A Robust Molecular Catalyst Generated In?Situ for Photo- and Electrochemical Water Oxidation
| Parent link: | ChemSusChem Vol. 10, iss. 5.— 2017.— [P. 862-875] |
|---|---|
| Korporativní autor: | |
| Další autoři: | , , , , , , , , |
| Shrnutí: | Title screen Water splitting is the key step towards artificial photosystems for solar energy conversion and storage in the form of chemical bonding. The oxidation of water is the bottle-neck of this process that hampers its practical utility; hence, efficient, robust, and easy to make catalytic systems based on cheap and earth-abundant materials are of exceptional importance. Herein, an in?situ generated cobalt catalyst, [CoII(TCA)2(H2O)2] (TCA=1-mesityl-1,2,3-1H-triazole-4-carboxylate), that efficiently conducts photochemical water oxidation under near-neutral conditions is presented. The catalyst showed high stability under photolytic conditions for more than 3?h of photoirradiation. During electrochemical water oxidation, the catalytic system assembled a catalyst film, which proved not to be cobalt oxide/hydroxide as normally expected, but instead, and for the first time, generated a molecular cobalt complex that incorporated the organic ligand bound to cobalt ions. The catalyst film exhibited a low overpotential for electrocatalytic water oxidation (360?mV) and high oxygen evolution peak current densities of 9 and 2.7?mA?cm?2 on glassy carbon and indium-doped tin oxide electrodes, respectively, at only 1.49 and 1.39?V (versus a normal hydrogen electrode), respectively, under neutral conditions. This finding, exemplified on the in?situ generated cobalt complex, might be applicable to other molecular systems and suggests that the formation of a catalytic film in electrochemical water oxidation experiments is not always an indication of catalyst decomposition and the formation of nanoparticles. |
| Jazyk: | angličtina |
| Vydáno: |
2017
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| Témata: | |
| On-line přístup: | http://dx.doi.org/10.1002/cssc.201601477 |
| Médium: | Elektronický zdroj Kapitola |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=656171 |
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| 200 | 1 | |a A Robust Molecular Catalyst Generated In?Situ for Photo- and Electrochemical Water Oxidation |f H. A. Yo. Hassan [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 56 tit.] | ||
| 330 | |a Water splitting is the key step towards artificial photosystems for solar energy conversion and storage in the form of chemical bonding. The oxidation of water is the bottle-neck of this process that hampers its practical utility; hence, efficient, robust, and easy to make catalytic systems based on cheap and earth-abundant materials are of exceptional importance. Herein, an in?situ generated cobalt catalyst, [CoII(TCA)2(H2O)2] (TCA=1-mesityl-1,2,3-1H-triazole-4-carboxylate), that efficiently conducts photochemical water oxidation under near-neutral conditions is presented. The catalyst showed high stability under photolytic conditions for more than 3?h of photoirradiation. During electrochemical water oxidation, the catalytic system assembled a catalyst film, which proved not to be cobalt oxide/hydroxide as normally expected, but instead, and for the first time, generated a molecular cobalt complex that incorporated the organic ligand bound to cobalt ions. The catalyst film exhibited a low overpotential for electrocatalytic water oxidation (360?mV) and high oxygen evolution peak current densities of 9 and 2.7?mA?cm?2 on glassy carbon and indium-doped tin oxide electrodes, respectively, at only 1.49 and 1.39?V (versus a normal hydrogen electrode), respectively, under neutral conditions. This finding, exemplified on the in?situ generated cobalt complex, might be applicable to other molecular systems and suggests that the formation of a catalytic film in electrochemical water oxidation experiments is not always an indication of catalyst decomposition and the formation of nanoparticles. | ||
| 461 | |t ChemSusChem | ||
| 463 | |t Vol. 10, iss. 5 |v [P. 862-875] |d 2017 | ||
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| 610 | 1 | |a катализаторы | |
| 610 | 1 | |a фотоокисление | |
| 610 | 1 | |a электрохимическое окисление | |
| 701 | 1 | |a Hassan |b H. A. Yo. |c chemical engineer |c assistant of Tomsk Polytechnic University |f 1985- |g Hussein Abdelazeem Younus |3 (RuTPU)RU\TPU\pers\39720 | |
| 701 | 1 | |a Ahmad |b N. |c chemical engineer |c assistant of Tomsk Polytechnic University |f 1981- |g Nazir |3 (RuTPU)RU\TPU\pers\39722 | |
| 701 | 1 | |a Chughtai |b A. H. |g Adeel | |
| 701 | 1 | |a Vandichel |b M. |g Matthias | |
| 701 | 1 | |a Busch |b M. |g Michael | |
| 701 | 1 | |a Van |b H. K. |g Hecke Kristof | |
| 701 | 1 | |a Yusubov |b M. S. |c chemist |c Professor of Tomsk Polytechnic University, Doctor of chemical sciences |f 1961- |g Mekhman Suleiman-Ogly (Suleimanovich) |3 (RuTPU)RU\TPU\pers\31833 | |
| 701 | 1 | |a Song |b Sh. |g Shaoxian | |
| 701 | 1 | |a Verpoort |b F. V. K. |c Chemical Engineer |c Professor of Tomsk Polytechnic University, doctor of chemical Sciences |f 1963- |g Frensis Valter Kornelius |3 (RuTPU)RU\TPU\pers\35059 |9 18334 | |
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