排序方式: 共有47条查询结果,搜索用时 15 毫秒
1.
Fangyang Liu Can Han Liangxing Jiang Jie Li Yexiang Liu 《Journal of Solid State Electrochemistry》2014,18(7):1833-1845
Based on the basic principles of kinetics and some reasonable assumptions about the electrodeposition process, a dynamic model for metal selenide electrodeposition (kink site selected model) was constructed. This model is of universal significance in realizing the compositional prediction and dynamic behavior analysis of deposited films for different main salt concentration ratios and was applied to the ternary Cu–In–Se system. For CuInSe2 electrodeposition, in the Cu–Se system, the co-deposition of Cu and Se can be carried out within a large range of main salt concentration ratio; in the Cu–In system, the mole fraction of Cu in deposited thin films is always higher than that of Cu2+ in electrolyte, while in the In–Se system, the co-deposition of In and Se can be achieved only when the In3+ concentration is much higher than the H2SeO3 concentration. As for the compositional estimation of CuInSe2, the predictive results of our dynamic model agree well with the experimental data. It is then found that by correcting the difference of kink site selectivity constants caused by the change of deposition potential, the error of the predictive results can be reduced. 相似文献
2.
Guangmei Cai Lihua Zeng Lanqi He Shujian Sun Yexiang Tong Jianyong Zhang 《化学:亚洲杂志》2020,15(13):1963-1969
A series of porphyrin‐based imine gels have been synthesized via dynamic covalent gelation between 5,10,15,20‐tetra(4‐aminophenyl)‐21H,23H‐porphyrin (H2TAPP) derivatives and various aldehyde compounds. The porphyrin‐ferrocene imine gels based on MTAPP (M=H2, Ni2+, Co2+, Pd2+ and Zn2+) and ferrocene‐1,1′‐dicarbaldehyde (NA) display efficient HER, OER and ORR activities in alkaline media. Among the gels, CoTAPP‐NA shows an HER current density of 10 mA cm?2 at low overpotential of 470 mV and small Tafel slope of 110 mV decade?1 in alkaline media. CoTAPP‐NA also exhibits OER catalytic activity with low overpotential (416 mV for 10 mA cm?2). CoTAPP‐NA shows ability in overall water splitting in alkaline media. In addition, CoTAPP‐NA exhibits onset potential (Ep) of 0.95 V and half‐wave potential (E1/2) of 0.84 V in 1.0 mol L?1 KOH solution for oxygen reduction. Moreover, the gel catalyst shows good stability. 相似文献
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Zhang X Lu X Shen Y Han J Yuan L Gong L Xu Z Bai X Wei M Tong Y Gao Y Chen J Zhou J Wang ZL 《Chemical communications (Cambridge, England)》2011,47(20):5804-5806
Three-dimensional (3D) WO(3) nanostructures were grown on carbon paper by a catalyst-free high temperature reactive vapor deposition process, which exhibit a good photoelectrochemical property and visible light driven photocatalytic performance. 相似文献
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In this Letter, a pair of novel naphthalimide derivatives with long-wavelength emission (>600 nm) and larger Stokes shift (>140 nm) have been developed through the photochemical cycloaromatization, in which intramolecular radical-induced 1,3-aromatic hydrogen transfer might be occurred. Cell uptake experiments showed that dye 2 could be used as a potential NIR fluorescence imaging agent. 相似文献
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Xie S Lu X Zhai T Gan J Li W Xu M Yu M Zhang YM Tong Y 《Langmuir : the ACS journal of surfaces and colloids》2012,28(28):10558-10564
We report the synthesis of Zn(x)Cd(1-x)S@ZnO nanorod arrays via a facile two-step process and the implementation of these core-shell nanorods as an environmental friendly and recyclable photocatalyst for methyl orange degradation. The band gap of Zn(x)Cd(1-x)S@ZnO core-shell nanorods can be readily tunable by adjusting the ratio of Zn/Cd during the synthesis. These Zn(x)Cd(1-x)S@ZnO core-shell nanorods exhibit a high photocatalytic activity and good stability in the degradation of the methyl orange. Moreover, these films grown on FTO substrates make the collection and recycle of the photocatalyst easier. These findings may open new opportunities for the design of effective, stable, and easy-recyclable photocatalytic materials. 相似文献
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酰胺-尿素-NaBr熔体中电沉积Tb-Co合金的研究 总被引:12,自引:2,他引:12
在353K的乙酰胺 尿素 NaBr熔体中,Co(Ⅱ)一步不可逆还原为金属Co,测得α为0.23和D0为1.25×10-6cm2·s-1;Tb(Ⅲ)不能单独还原为Tb,但是可以被Co2+诱导而共沉积。由恒电位电解法得到非晶态的Tb Co合金;Tb的含量随阴极电位的负移、Tb3+ Co2+摩尔比增大及电解时间延长而增大,Tb的最大含量可达83.91wt%。Tb Co合金膜经高温晶化后用X射线衍射分析其组成为(TbCo3)12R。 相似文献
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Lei Hu Tuzhi Xiong Ran Liu Yuwen Hu Dr. Yanchao Mao Prof. M.-Sadeeq Balogun Prof. Yexiang Tong 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(26):6575-6583
In the work reported herein, the electrocatalytic properties of Co3O4 in hydrogen and oxygen evolution reactions have been significantly enhanced by coating a shell layer of a copper-based metal–organic framework on Co3O4 porous nanowire arrays and using the products as high-performance bifunctional electrocatalysts for overall water splitting. The coating of the copper-based metal–organic framework resulted in the hybridization of the copper-embedded protective carbon shell layer with Co3O4 to create a strong Cu−O−Co bonding interaction for efficient hydrogen adsorption. The hybridization also led to electronically induced oxygen defects and nitrogen doping to effectively enhance the electrical conductivity of Co3O4. The optimal as-prepared core–shell hybrid material displayed excellent overall-water-splitting catalytic activity that required overall voltages of 1.45 and 1.57 V to reach onset and a current density of 10 mA cm−2, respectively. This is the first report to highlight the relevance of hybridizing MOF-based co-catalysts to boost the electrocatalytic performance of nonprecious transition-metal oxides. 相似文献
10.
Mingyang Li Xinjun He Yinxiang Zeng Meiqiong Chen Ziyang Zhang Hao Yang Pingping Fang Xihong Lu Yexiang Tong 《Chemical science》2015,6(12):6799-6805
Hydrogen gas is emerging as an attractive fuel with high energy density for the direction of energy resources in the future. Designing integrated devices based on a photoelectrochemical (PEC) cell and a microbial fuel cell (MFC) represents a promising strategy to produce hydrogen fuel at a low price. In this work, we demonstrate a new solar-microbial (PEC–MFC) hybrid device based on the oxygen-deficient Nb2O5 nanoporous (Nb2O5–x NPs) anodes for sustainable hydrogen generation without external bias for the first time. Owing to the improved conductivity and porous structure, the as-prepared Nb2O5–x NPs film yields a remarkable photocurrent density of 0.9 mA cm–2 at 0.6 V (vs. SCE) in 1 M KOH aqueous solution under light irradiation, and can achieve a maximum power density of 1196 mW m–2 when used as an anode in a MFC device. More importantly, a solar-microbial hybrid system by combining a PEC cell with a MFC is designed, in which the Nb2O5–x NPs electrodes function as both anodes. The as-fabricated PEC–MFC hybrid device can simultaneously realize electricity and hydrogen using organic matter and solar light at zero external bias. This novel design and attempt might provide guidance for other materials to convert and store energy. 相似文献