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31.
Stefan Popović Dr. Milutin Smiljanić Dr. Primož Jovanovič Jan Vavra Prof. Dr. Raffaella Buonsanti Prof. Dr. Nejc Hodnik 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(35):14844-14854
To date, copper is the only monometallic catalyst that can electrochemically reduce CO2 into high value and energy-dense products, such as hydrocarbons and alcohols. In recent years, great efforts have been directed towards understanding how its nanoscale structure affects activity and selectivity for the electrochemical CO2 reduction reaction (CO2RR). Furthermore, many attempts have been made to improve these two properties. Nevertheless, to advance towards applied systems, the stability of the catalysts during electrolysis is of great significance. This aspect, however, remains less investigated and discussed across the CO2RR literature. In this Minireview, the recent progress on understanding the stability of copper-based catalysts is summarized, along with the very few proposed degradation mechanisms. Finally, our perspective on the topic is given. 相似文献
32.
Milutin M. Milosavljevi? Milica Sovrli? Aleksandar D. Marinkovi? Dragan D. Milenkovi? 《Monatshefte für Chemie / Chemical Monthly》2010,57(2):749-755
Abstract
A novel synthesis of N-alkyl and N,N-dialkyl O-ethyl thiocarbamates from diethyl dixanthogenate and primary and secondary amines, using three oxidizing systems, has been developed on the laboratory scale, and the method using sodium hypochlorite has been applied on a semi-industrial scale. The effect of the oxidizing agents, sodium hypochlorite, in-situ-generated peracetic acid, and the manganese(II) acetate/oxygen system on product purity and yield was studied. The results obtained by use of these three methods were compared with those obtained by reaction of sodium ethyl xanthogenacetate and amines, and of sodium ethyl xanthate with amines in the presence of sulfated nickel zeolite catalyst. The reaction mechanism of sodium hypochlorite oxidation has been established on the basis of isolation of reaction intermediates and determination of their structure by use of Fourier-transform infrared, 1H and 13C NMR, and mass spectrometric methods. The suggested sodium hypochlorite and manganese(II) acetate/oxygen systems have many advantages in comparison with commercial and catalytically promoted synthetic methods, because they are new ecologically friendly syntheses. 相似文献33.
34.
Milutin R. Dostanić 《纯数学与应用数学通讯》2011,64(8):1148-1164
For the eigenvalues $( \lambda_{n}) _{n=1}^{\infty}$ of the Dirichlet Laplacian on a bounded convex domain $\font\open=msbm10 at 10pt\def\C{\hbox{\open C}}\Omega\subset{\C}$ , we find the sum of the series the regularized trace of the inverse of Dirichlet Laplacian. © 2011 Wiley Periodicals, Inc. 相似文献
35.
Stefan Popovi Milutin Smiljani Primo Jovanovi
Jan Vavra Raffaella Buonsanti Nejc Hodnik 《Angewandte Chemie (International ed. in English)》2020,59(35):14736-14746
To date, copper is the only monometallic catalyst that can electrochemically reduce CO2 into high value and energy‐dense products, such as hydrocarbons and alcohols. In recent years, great efforts have been directed towards understanding how its nanoscale structure affects activity and selectivity for the electrochemical CO2 reduction reaction (CO2RR). Furthermore, many attempts have been made to improve these two properties. Nevertheless, to advance towards applied systems, the stability of the catalysts during electrolysis is of great significance. This aspect, however, remains less investigated and discussed across the CO2RR literature. In this Minireview, the recent progress on understanding the stability of copper‐based catalysts is summarized, along with the very few proposed degradation mechanisms. Finally, our perspective on the topic is given. 相似文献
36.
Milutin R. Dostanić 《Mathematische Zeitschrift》2001,236(3):453-459
We prove that for every Volterra operator T the inequality holds, where b is an absolute constant and are its singular values.
Received January 26, 2000 / Published online February 5, 2001 相似文献
37.
We theoretically study the properties of one-dimensional nonlinear saturable photonic lattices exhibiting multiple mobility windows for stationary solutions. The effective energy barrier decreases to a minimum in those power regions where a new intermediate stationary solution appears. As an application, we investigate the dynamics of high-power Gaussian-like beams finding several regions where the light transport is enhanced. 相似文献
38.
Milutin M. Milosavljevi? Aleksandar D. Marinkovi? Vlada B. Veljkovi? Dragan D. Milenkovi? 《Monatshefte für Chemie / Chemical Monthly》2012,13(2):43-49
Abstract
The kinetics of the syntheses of N-alkyl, N,N-dialkyl, and N-(4-substituted phenyl) O-ethyl thioncarbamates from sodium ethyl xanthogenacetate, ten alkylamines, and eight substituted anilines were studied at 25, 30, 35, and 40 °C. The reactions were found to follow second-order kinetics. The kinetic (Arrhenius) parameters, such as the activation energy and the frequency factor, as well as the Eyring parameters, such as the standard entropy, the standard Gibbs energy, and the standard enthalpy of activation, were calculated from the second-order rate constants. The mechanism of the reaction was postulated based on the kinetic studies presented and the optimization of the reaction mechanism using the MOPAC PM6 semi-empirical method. 相似文献39.
Milutin R. Dostanic 《Proceedings of the American Mathematical Society》1997,125(7):2115-2118
In this paper the dependence of the constant in the inequality on simply connected bounded domains is found.
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