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1.
Luis A. Toledo-Matos Maximo Antonio Pech-Canul 《Journal of Solid State Electrochemistry》2011,15(9):1927-1934
The evolution under open-circuit conditions of iron passive films formed at 0.8 VSCE in a borate buffer solution at pH 8.4 was investigated with electrochemical impedance spectroscopy (EIS) and cyclic voltammetry.
The composition of the freshly formed passive film as determined by X-ray photoelectron spectroscopy (XPS) was found to be
in agreement with a bilayer model, where the inner layer is composed mainly of iron oxide and the outer layer consists of
a hydrated material. Results of XPS measurements also showed that the open-circuit breakdown of passive films was consistent
with a reductive dissolution mechanism. When the iron electrode reached an intermediate stage in the open-circuit potential
decay (approximately −0.3 VSCE), the oxide film, containing both Fe(II) and Fe(III), was still protective. The impedance response in this stage exhibited
a mixed control by charge transfer at the metal/film and film/solution interfaces and diffusion of point defects through the
film. At the final stage of the open-circuit potential decay (approximately −0.7 VSCE), the oxide film was very thin, and the ratio of Fe3+/Fe2+ and O2−/OH− had decreased significantly. The impedance response also exhibited a mixed charge-transfer–diffusion control, but the diffusion
process was related to transport of species in the electrolyte solution resulting from dissolution of the oxide film. 相似文献
2.
Tzvetanka Boiadjieva Milko Monev Alexander Tomandl Hermann Kronberger Günter Fafilek 《Journal of Solid State Electrochemistry》2009,13(5):671-677
The electrochemical deposition and dissolution of Zn on Pt electrode in sulphate electrolyte was investigated by electrochemical
methods in an attempt to contribute to the better understanding of the more complex Zn–Cr alloy electrodeposition process.
A decrease of the Zn electrolyte pH (from 5.4 to 1.0) so as to minimise/avoid the formation of hydroxo-products of Cr in the
electrolyte for deposition of alloy coatings decreases the current efficiency for the Zn reaction, but the rate of the cathode
reaction increases significantly due to intense hydrogen evolution. The results of the investigations in Zn electrolytes with
pH 1.0–1.6 indicate that Zn bulk deposition is preceded by hydrogen evolution, stepwise Zn underpotential deposition (UPD)
and formation of a Zn–Pt alloy. Hydrogen evolution from H2O starts in the potential range of Zn bulk deposition. Data obtained from the electrochemical quartz crystal microbalance
(EQCM) measurements support the assumption that electrochemical deposition of Zn proceeds at potentials more positive than
the reversible potential of Zn. Anodic potentiodynamic curves for galvanostatically and potentiostatically deposited Zn layers
provide indirect evidence about the dissolution of Zn from an alloy with the Pt substrate. The presumed potential of co-deposition
of Cr (−1.9 V vs. Hg/Hg2SO4) is reached at a current density of about 300 mA cm−2. 相似文献
3.
Ming-Yao Cheng Ching-Yeh Shiau Ping-Hung Lin Jen-Chen Chang 《Journal of Solid State Electrochemistry》2011,15(4):773-779
In this study, samaria-doped ceria (Sm0.2Ce0.8O1.9, SDC) thin film is deposited on the Ni-SDC support by employing the electrophoretic deposition technique. Various factors
are considered for the deposition of SDC films. The corresponding microstructure of the deposited SDC film is examined and
correlated to the electrochemical performance as a single-chamber solid oxide fuel cell (sc-SOFC). It is found that the microstructure
of the SDC film mainly relates to the particle size of SDC. After heat treatment, highly dense SDC film is obtained with the
deposition condition of 5 g L−1 of the SDC suspension (average grain size of SDC, 248 nm), 60 V as the applied potential, and the deposition time of 1 min
(18 μm in thickness). For the Ni-SDC/SDC/SSC cell, an open circuit potential of 0.92 V and peak power density of 155 mW cm−2 can be obtained at the furnace temperature of 500 °C. 相似文献
4.
Arvydas Survila Jolanta Pileckien? Stas? Kanapeckait? Putinas Kalinauskas Giedrius Stalnionis 《Journal of Solid State Electrochemistry》2012,16(2):521-527
In accordance with thermodynamic analysis, cuprous oxide layers are formed spontaneously in the Cu|Cu(II), gluconic acid system
at pH > 3.7 under open-circuit conditions. A current peak of Cu2O reduction is observed on cathodic voltammograms at ca −0.7 V, its height being dependent on the exposure time. The analysis
of the charge transferred in this region yields the rate of Cu2O formation equal to 1.25 × 10−10 mol cm−2 s−1. The light perturbation of Cu electrode under open-circuit conditions results in the generation of a negative photopotential,
which is indicative of n-type conductivity. The threshold wavelength is equal to ∼590 nm and is consistent with a band gap of ∼2.1 eV. Anodic photocurrents,
which are observed near the open-circuit potential, decrease with cathodic polarization and change their sign at ∼0.05 V.
Analysis of impedance data was performed, invoking the equivalent circuit that accounts for the two-step charge transfer.
In the presence of Cu2O, some retardation of Cu(II) reduction was found to occur with a slight increase in the admittance of the double layer. The
suggestion has been made that oxide layers formed in Cu(II) gluconate solutions cannot be compact and uniformly distributed
over the entire electrode surface. Relevant investigations of surface morphology support this conclusion. 相似文献
5.
J. Schnöller R. Franz C. Mitterer H. Hutter 《Analytical and bioanalytical chemistry》2009,393(8):1857-1861
V-alloyed AlCrN hard coatings were deposited on silicon wafers (Si (100)) by reactive arc evaporation in a commercial coating
system at 500 °C for 10 min, resulting in a coating thickness of ∼500 nm. The chemical composition of the stoichiometric coatings
is constant at approximately Al0.70Cr0.05V0.25N regardless of the applied bias voltage during deposition. Coatings synthesized at a low bias of −40 V show a dual-phase
structure (hexagonal close-packed and face-centered cubic (fcc)), whereas coatings deposited at a high bias of −150 V have
a metastable single-phase structure (face-centered cubic). All samples were oxidized for 15 min under 20 mbar O2 atmosphere and at four different temperatures (550, 600, 650, and 700 °C). The oxidized coatings were subject to depth profiling
and element mapping by a time of flight secondary ion mass spectrometry instrument, equipped with a Bi-cluster analysis gun
and Cs+-sputter gun. The evaluation of the in-depth distribution of several elements and species points out distinctive differences
in the oxidation behavior of the two different coatings, whereas element mapping shows the formation of islands made of oxidized
vanadium and aluminum species as the top-most layer of the single-phase (fcc) coating at temperatures above 650 °C. 相似文献
6.
Merlin C. E. Bandeira Joseph A. Crayston Norberto S. Gonçalves Lúcia K. Noda Andrew Glidle César V. Franco 《Journal of Solid State Electrochemistry》2007,11(2):231-239
The electropolymerization of trans-[RuCl2(vpy)4] (vpy=4-vinylpyridine) on Au or Pt electrodes was studied by cyclic voltammetry, electrochemical quartz crystal microbalance (EQCM) technique, and Raman spectroscopy. Cyclic voltammetry of the monomer at a microelectrode shows the typical Ru(III/II) and Ru(IV/III) waves, together with the vinyl reduction waves at −1.5 and −2.45 V and adsorption wave at −0.8 V. Electrodeposition on EQCM technique performed under potential cycling between −0.9 and −2.0 V revealed that the polymerization proceeded well in advance of the vinyl reduction waves. At potentials more positive than −0.9 V, soluble oligomers were deposited irreversibly on the electrode during the oxidative sweep. The film also showed reversible mass changes due to the oxidation and accompanying ingress of charge-balancing anions and solvent into the film. In contrast, potentiostatic growth of the polymer at −1.6 V was slower because the oligomeric material was lost completely from the electrode. Unreacted vinyl groups were detected by in situ Raman spectroscopy for films grown at −0.7, −0.9, and −1.6 V but were absent when the polymerization was carried out at −2.9 V vs Ag/Ag+. 相似文献
7.
Hue-Hsin Chen Peter N. Kalu Egwu E. Kalu 《Journal of Solid State Electrochemistry》2010,14(6):1013-1020
Copper indium diselenide (CuInSe2; CIS) layer was electrolytically plated from an aqueous medium at room temperature onto electroless nickel deposited on flexible
plastic (Kapton). The CIS depositions were carried out under constant deposition potentials (−0.5 to −1.1 V vs. Ag/AgCl) and
at various electrolyte flow rates (0.3 to 1.5 ml/s) under constant applied current. The resulting thin films were characterized
using atomic force microscopy, energy-dispersive X-ray spectroscopy, environmental scanning electron microscopy, and X-ray
diffraction. The surface morphology and the atomic composition of the deposited CIS film were found to be influenced by the
deposition potential under potential control and the electrolyte recirculation rate under current control. Low electrolyte
flow rates under constant current control and high cathodic deposition potential under voltage control favor the deposition
of indium. CIS films of uniform deposit, smoother surfaces, and with better adhesion properties are favored by moderate electrolyte
recirculation rate. At a current density of 0.6 mA/cm2, the electrolyte recirculation rate required to achieve ideal CIS atomic composition was found to be 1.0 ml/s in such a setting.
The crystallinity of the film improved after annealing for 2 h at 390 °C under argon atmosphere. 相似文献
8.
Rika M. Y. A. Rahman M. M. Salleh A. A. Umar A. Ahmad 《Journal of Solid State Electrochemistry》2010,14(11):2089-2093
A nanoparticle TiO2 solid-state photoelectrochemical cell has been fabricated. The effect of ionic conductivity of a solid electrolyte of polyacrylonitrile
(PAN)–propylene carbonate (PC)–lithium perchlorate (LiClO4) on the performance of a photoelectrochemical cell of indium tin oxide (ITO)/TiO2/PAN–PC–LiClO4/graphite has been investigated. A nanoparticle TiO2 film was deposited onto ITO-covered glass substrate by controlled hydrolysis technique. A solid electrolyte of PAN–LiClO4 with PC plasticizer prepared by solution casting technique was used as a redox couple medium. The room temperature conductivity
of the electrolyte was determined by AC impedance spectroscopy technique. A graphite electrode was prepared onto a glass slide
by electron beam evaporation technique. The device shows a photovoltaic effect under illumination. The short-circuit current
density, J
sc, and open-circuit voltage, V
oc, vary with the conductivity of the electrolyte. The highest J
sc of 2.82 μA cm−2 and V
oc of 0.56 V were obtained at the conductivity of 4.2 × 10−4 Scm−1 and at the intensity of 100 mW cm−2. 相似文献
9.
Igor Vrublevsky Vladimir Parkoun Vitaly Sokol Joachim Schreckenbach Werner A. Goedel 《Mikrochimica acta》2006,156(1-2):173-179
Chemical dissolution of the barrier layer of porous oxide films formed on an aluminum foil (99.5% purity) in 1.5 M sulfanic
acid after immersion in a 2 mol dm−3 sulphuric acid at 50 °C was studied. The barrier layer thickness before and after dissolution was determined using a re-anodizing
technique. Re-anodizing was conducted in 0.5 mol dm−3 H3BO3/0.05 mol dm−3 Na2B4O7 solution. We found that the change in the porous oxide growth mechanism was observed at the anodizing voltage of 30 V. Taking
into account this result chemical dissolution behaviour of the barrier layer of porous films formed at 20 V and 36 V and also
the influence of annealing of oxide films at 200 °C were studied. We showed the interplay between the dissolution rates and
charge distribution across the barrier layer. We conclude that the outer and middle layers have negative space charges and
the inner layer has positive space charges. 相似文献
10.
M. Jayakumar K. A. Venkatesan T. G. Srinivasan P. R. Vasudeva Rao 《Journal of Radioanalytical and Nuclear Chemistry》2010,284(1):79-85
The electrochemical behavior of ruthenium(III) and rhodium(III) in nitric acid medium has been studied at platinum and stainless
steel electrodes by cyclic voltammetry. The cyclic voltammograms consisted of surge in cathodic current occurring at potentials
of −0.13 V (Vs. Pd) and −0.15 V (Vs. Pd), which culminates into peaks at −0.47 V and −0.5 V due to the reductions of Ru(III)
and Rh(III) to their metallic forms, respectively. Electrodeposition was carried out at stainless steel electrode and unlike
palladium, the recovery of ruthenium and rhodium was limited to ~4% and ~14%, respectively. However, a different scenario
was observed in case of electrodeposition from a ternary solution containing all these platinum metals. Ruthenium and rhodium
deposited underpotentially in the presence of palladium and the recovery of ~20% and ~5% was observed for ruthenium and rhodium,
respectively. Evolution of RuO4 at the anode and deposition of RuO2 in the anodic side was observed in all cases during electrolysis of ruthenium(III) containing solutions. 相似文献
11.
G. Horányi 《Journal of Solid State Electrochemistry》2000,4(3):177-180
The specific adsorption of 36Cl-labelled Cl− ions and 35S-labelled HSO4
− ions was studied in 1 mol dm−3 HClO4 supporting electrolyte in the presence of Cd2+ ions at a gold support over a wide potential range corresponding to electrodeposition, alloy formation, underpotential deposition
of Cd species and existence of an adatom-free surface. The distinct sections in the potential dependence of the adsorption
of anions together with the potential versus time curves obtained under open circuit conditions reflect the changes in the
state of the electrode surface, the dissolution of the bulk Cd phase and the slow elimination of Cd species from the Cd/Au
alloy.
Received: 16 March 1999 / Accepted: 5 May 1999 相似文献
12.
Dong Mei Gao Yuan Yuan Sun Qiongyan Zhao Jing Bo Hu Qi Long Li 《Mikrochimica acta》2008,160(1-2):241-246
A novel electrode was prepared by implanting NH2
+ into an ITO film (NH2/ITO). Gold nanoparticles were deposited on the surface of NH2/ITO electrode. The NH2/ITO and Au/NH2/ITO electrodes were used to determine hemoglobin (Hb) immobilized on the electrodes surfaces. The relationship of the reductive
peak current value of Hb among different electrodes was: Hb/ITO:Hb/Au/ITO:Hb/NH2/ITO:Hb/Au/NH2/ITO=1:1.5:2:4. The linkage between the –NH2 implanted into ITO film and the –COOH of Hb was recognized to be the reason for the increase of active Hb coverage on NH2/ITO electrode compared with the ITO electrode. Increase of active Hb coverage on Au/NH2/ITO compared with Au/ITO was attributed to the different amount of gold nanoparticles deposited. The determination of Hb
at an Au/NH2/ITO electrode was optimized. Calibration curve was obtained over the range of 1.0 × 10−8 – 1.0 × 10−6 mol · L−1 with a detection limit of 1.0 × 10−8 mol · L−1. Results showed that the novel NH2/ITO and Au/NH2/ITO electrodes exhibited good stability, reproducibility besides better electrochemical performance.
Correspondence: Jing Bo Hu, Department of Chemistry, Beijing Normal University, Beijing 100875, China 相似文献
13.
Tian Yongmei Huang Jichun Gao Yuan Cao Dianxue Wang Guiling 《Journal of Solid State Electrochemistry》2012,16(5):1901-1906
Fe–N–C catalysts were prepared through metal-assisted polymerization method. Effects of carbon treatment, Fe loading, nitrogen
source, and calcination temperature on the catalytic performance of the Fe–N–C for H2O2 electroreduction were measured by voltammetry and chronoamperometry. The Fe–N–C catalyst shows optimal performance when prepared
with pretreated active carbon, 0.2 wt.% Fe, paranitroaniline (4-NA) and one-time calcination. The Fe–N–C catalyst displayed
good performance and stability for electroreduction of H2O2 in alkaline solution. An Al–H2O2 semi-fuel cell was set up with Fe–N–C catalyst as cathode and Al as anode. The cell exhibits an open-circuit voltage of 1.3 V
and its power density reached 51.4 mW cm−2 at 65 mA cm−2. 相似文献
14.
Genovaitė Valiulienė Albina Žielienė Birutė Šimkūnaitė Leonas Naruškevičius Loreta Tamašauskaitė Tamašiūnaitė Vidas Pakštas Algis Selskis 《Journal of Solid State Electrochemistry》2010,14(2):203-212
The electrochemical behavior of Bi2S3 coatings in Watts nickel plating electrolyte was investigated using the cyclic voltammetry, electrochemical quartz crystal
microbalance, X-ray diffraction, and energy dispersive X-ray analysis methods. During the bismuth sulfide coating reduction
in Watts background electrolyte in the potential region from −0.4 to −0.6 V, the Bi2S3 and Bi(III) oxygen compounds are reduced to metallic Bi, and the decrease in coating mass is related to the transfer of S2− ions from the electrode surface. When the bismuth sulfide coating is reduced in Watts nickel plating electrolyte, the observed
increase in coating mass in the potential region −0.1 to −0.4 V is conditioned by Ni2+ ions reduction before the bulk deposition of Ni, initiated by Bi2S3. In this potential region, the reduction of Bi(III) oxygen compounds can occur. After the treatment of as-deposited bismuth
sulfide coating in nickel plating electrolyte at E = −0.3 V, the sheet resistance of the layer decreases from 1013 to 500–700 Ω cm. A metal-rich mixed sulfide Ni3Bi2S2–parkerite is obtained when as-deposited bismuth sulfide coating is treated in Watts nickel plating electrolyte at a potential
close to the equilibrium potential of the Ni/Ni2+ system and then annealed at temperatures higher than 120 °C. 相似文献
15.
Weichun Ye Yongjie Li Bo Yang Chunming Wang 《Journal of Solid State Electrochemistry》2007,11(9):1347-1351
Pd/Ag films were electrolessly deposited onto p-silicon (100)-activated seed layers of Ag and Pd, respectively, in the solution
of 0.005 mol l−1 AgNO3 + 0.005 mol l−1 PdCl2 + 4.5 mol l−1 NH3 + 0.16 mol l−1 Na2EDTA+0.1 mol l−1 NH2NH2 (pH 10.5) at room temperature. The morphology and composition of the films were studied comparatively by using atomic force
microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). Cathodic polarization curves for hydrogen evolution were recorded
in 0.5-mol l−1 H2SO4 without illumination, in which the obtained films served as working electrodes. The experimental results show that the film
obtained on the Ag seed layer was rather a pure Ag film and not a Pd/Ag film, and the Ag deposition rate on Pd sites was much
faster than that on Ag sites. 相似文献
16.
M. O. Solaliendres A. Manzoli G. R. Salazar-Banda K. I. B. Eguiluz S. T. Tanimoto S. A. S. Machado 《Journal of Solid State Electrochemistry》2008,12(6):679-686
The processes involved in the Se electrodeposition, mainly the one related to the formation of H2Se species on Au electrode in perchloric acid solutions, have been investigated through cyclic voltammetry, electrochemical
quartz crystal microbalance (EQCM), rotating ring-disc electrode (RRDE), and atomic force microscopy (AFM) techniques. In
the experiments performed with the EQCM, with the potential sweep in the negative direction, the responses for the mass variation
were divided in three well-defined potential regions: A (from 1.55 to 0.35 V), B (from 0.35 to −0.37 V), and C (from −0.37
to −0.49 V). It was verified that the following processes can occur, respectively: the species (AuO)2H2SeO3 was desorbed during the AuO reduction, the reduction of Se(IV) to Se(0), and the formation of H2Se. When the potential was swept in the positive direction, the responses for the mass variation were divided in four well-defined
potential regions: D (from −0.49 to 0.66 V), E (from 0.66 to 0.99 V), F (from 0.99 to 1.26 V), and G (from 1.26 to 1.55 V),
and the described processes in these regions were, respectively: the Se deposition and adsorption of water molecules and/or
perchlorate ions, the Se dissolution, the Se incorporating mass in the form of HO–Se, and the Au oxidation (all potentials
are referred to the Ag/AgCl electrode). Making use of the RRDE, using the collection technique, the formation of H2Se species during the Se electrodeposition was investigated. Therefore, it was confirmed that this species is formed on the
disc electrode between −0.3 and −0.55 V vs the Ag/AgCl potential range (collecting the oxidized compound onto the ring electrode).
AFM images also indicated that the surface topography of the Se-massive deposit on Au is different from the images registered
after the formation of H2Se species, confirming the cathodic stripping of Se. 相似文献
17.
Shuhu Xiao Jiuhui Qu Huijuan Liu Xu Zhao Dongjin Wan 《Journal of Solid State Electrochemistry》2009,13(12):1959-1964
Titanium oxide nanotube electrodes were successfully prepared by anodic oxidation on pure Ti sheets in 0.5 wt.% NH4F + 1 wt.% (NH4)2SO4 + 90 wt.% glycerol mixed solutions. Nanotubes with diameter 40–60 nm and length 7.4 μm were observed by field emission scanning
electron microscope. The electrochemical and photoelectrochemical characteristics of TiO2 nanotube electrode were investigated using linear polarization and electrochemical impedance spectroscopy techniques. The
open-circuit potential dropped markedly under irradiation and with the increase of Cl− concentrations. A saturated photocurrent of approximately 1.3 mA cm−2 was observed under 10-W low-mercury lamp irradiation in 0.1 M NaCl solution, which was much higher than film electrode. Meanwhile,
the highest photocurrent in NaCl solution implied that the photogenerated holes preferred to combine with Cl−. Thus, a significant synergetic effect on active chlorine production was observed in photoelectrocatalytic processes. Furthermore,
the generation efficiency for active chlorine was about two times that using TiO2/Ti film electrode by sol–gel method. Finally, the effects of initial pH and Cl− concentration were also discussed. 相似文献
18.
Zhirong Mo Faqiong Zhao Fei Xiao Baizhao Zeng 《Journal of Solid State Electrochemistry》2010,14(9):1615-1620
Gold–platinum (AuPt) alloy particles were fabricated directly on multi-walled carbon nanotubes (MWNT)–ionic liquid (i.e.,
trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)imide, [P6,6,6,14][NTf2]) composite coated glassy carbon electrode (GCE) by electrodeposition method. Scanning electron microscope image showed that
they were well-dispersed nanocluster consisting of smaller nanoparticles, and their size was about 70 nm. X-ray diffraction
experiment showed that they were single-phase alloy nanomaterial, and the calculated composition was consisting with that
obtained by energy dispersive X-ray spectroscopy. The resulting modified electrode (i.e., AuPt–MWNT–[P6,6,6,14][NTf2]/GCE) presented high catalytic activity for the electrochemical oxidation of cysteine. The peak potential of cysteine shifted
to 0.42 V (versus saturated calomel electrode) in 0.1 M H2SO4 and the peak current increased greatly in comparison with that on the corresponding Pt (or Au)–MWNT–[P6,6,6,14][NTf2]/GCE. Under the optimized conditions, the oxidation current of cysteine at 0.45 V was linear to its concentration in the
range of 5.0 × 10−7 ∼ 4.0 × 10−5 M with a sensitivity of 43.8 mA M−1. 相似文献
19.
《Electrochemistry communications》2007,9(6):1293-1297
A combination of photocathodic stripping and precipitation was used to prepare CdTe nanoparticles (size range: 30–60 nm) that were immobilized on a polycrystalline Au substrate. Thus visible light irradiation of a Te modified Au surface generated Te2− species in situ followed by interfacial reaction with added Cd2+ ions in 0.1 M Na2SO4 electrolyte. The resultant CdTe compound semiconductor deposited as nanosized particles uniformly dispersed on the Au substrate surface. This approach to CdTe nanoparticle deposition was monitored by a combination of electrochemical methods (voltammetry, chronoamperometry) and quartz crystal microgravimetry in the “dark” and under illumination. The synthesized CdTe nanoparticles were characterized by scanning electron microscopy and energy dispersive X-ray analyses and laser Raman spectroscopy. 相似文献
20.
Effect of dioctyl sulfide on the kinetics of oxidative dissolution of gold nanoparticles in triton N-42 reverse micelles 总被引:1,自引:0,他引:1
V. V. Tatarchuk A. I. Bulavchenko I. A. Druzhinina A. P. Sergievskaya 《Russian Journal of Inorganic Chemistry》2011,56(5):808-815
The effect of additions of hydrophobic dioctyl sulfide (L) on the kinetics of dissolution of gold nanoparticles in the interaction
with a dispersed aqueous hydrochloric solution of H2O2 in Triton N-42 reverse micelles (decane was the dispersion medium) was studied spectrophotometrically. The process consists
of a two-stage oxidation Au0 → AuCl2− → AuCl4− at the surface of gold particles; the first stage occurs in two ways: a spontaneous reaction and an autocatalytic reaction
involving AuCl4− ions. With small additions of L (c
L < c
Au), only spontaneous oxidation of Au(0) to Au(I) takes place because Au(I) is completely bound in an inert complex AuLCl. When
unbound L is exhausted, the newly formed AuLCl is accumulated in micellar shells, changes the properties of the medium inside
the micelles, and affects the rate constant of the autocatalytic reaction, which increases with increasing c
L. At high concentrations of L, the coagulation of particles occurs instead of their dissolution, because of the deterioration
of the protective properties of micellar shells as a result of the ingression and accumulation of dioctyl sulfide molecules
on account of selective adsorption on gold particles. The rate constants of all stages of dissolution and coagulation are
determined. 相似文献