Earth-Abundant Molecular Z-Scheme Photoelectrochemical Cell for Overall Water-Splitting

被引：102

作者：

Windle, Christopher D. ^{[1
]}

Kumagai, Hiromu ^{[2
,8
]}

Higash, Masanobu ^{[3
]}

Brisse, Romain ^{[4
]}

Bold, Sebastian ^{[1
,5
,6
,7
]}

Jousselme, Bruno ^{[4
]}

Chavarot-Kerlidou, Murielle ^{[1
]}

Maeda, Kazuhiko ^{[2
]}

Abe, Ryu ^{[3
]}

Ishitani, Osamu ^{[2
]}

Artero, Vincent ^{[1
]}

机构：

[1] Univ Grenoble Alpes, CNRS, UMR 5249, CEA,Lab Chim & Biol Metaux, 17 Rue Martyrs, F-38054 Grenoble, France

[2] Tokyo Inst Technol, Sch Sci, Dept Chem, Meguro Ku, O Okayama 2-12-1-NE-1, Tokyo 1528550, Japan

[3] Kyoto Univ, Grad Sch Engn, Dept Energy & Hydrocarbon Chem, Nishikyo Ku, Kyoto 6158510, Japan

[4] Univ Paris Saclay, CNRS, CEA Saclay, NIMBE,CEA,Lab Innovat Surface Chem & Nanosci LICS, F-91191 Gif Sur Yvette, France

[5] Friedrich Schiller Univ Jena, Inst Phys Chem, Helmholtzweg 4, D-07743 Jena, Germany

[6] Friedrich Schiller Univ Jena, Abbe Ctr Photon, Helmholtzweg 4, D-07743 Jena, Germany

[7] Leibniz Inst Photon Technol Jena IPHT, Dept Funct Interfaces, Albert Einstein Str 9, D-07745 Jena, Germany

[8] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2019年 / 141卷 / 24期

基金：

日本科学技术振兴机构;

关键词：

DYE-SENSITIZED PHOTOCATHODE; HYDROGEN EVOLUTION; NICKEL-OXIDE; THIN-FILMS; COBALOXIME CATALYST; NIO PHOTOCATHODES; DRIVEN; CUGAO2; SYSTEM; ASSEMBLIES;

D O I：

10.1021/jacs.9b02521

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A push-pull organic dye and a cobaloxime catalyst were successfully cografted on NiO and CuGaO2 to form efficient molecular photocathodes for H-2 production with >80% Faradaic efficiency. CuGaO2 is emerging as a more effective p-type semiconductor in photoelectrochemical cells and yields a photocathode with 4-fold higher photocurrent I so densities and 400 mV more positive onset photocurrent potential compared to the one based on NiO. Such an optimized CuGaO2 photocathode was combined with a TaON vertical bar CoOx photoanode in a photoelectrochemical cell. Operated in this Z-scheme configuration, the two photo-electrodes produced H-2 and O-2 from water with 87% and 88% Faradaic efficiency, respectively, at pH 7 under visible light and in the absence of an applied bias, equating to a solar to hydrogen conversion efficiency of 5.4 X 10(-3)%. This is, to the best of our knowledge, the highest efficiency reported so far for a molecular-based noble metal-free water splitting Z-scheme.

引用

页码：9593 / 9602

页数：10

共 47 条

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