Solar Hydrogen Production by Amorphous Silicon Photocathodes Coated with a Magnetron Sputter Deposited Mo2C Catalyst

被引：77

作者：

Morales-Guio, Carlos G. ^{[1
]}

Thorwarth, Kerstin ^{[2
]}

Niesen, Bjoem ^{[2
]}

Liardet, Laurent ^{[1
]}

Patscheider, Jorg ^{[2
]}

Ballif, Christophe ^{[3
]}

Hu, Xile ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne EPFL, Inst Chem Sci & Engn, Lab Inorgan Synth & Catalysis, CH-1015 Lausanne, Switzerland

[2] Swiss Fed Labs Mat Sci & Technol EMPA, Lab Nanoscale Mat Sci, CH-8600 Dubendorf, Switzerland

[3] Ecole Polytech Fed Lausanne EPFL, Inst Microengn IMT, Photovolta & Thin Film Elect Lab, CH-2000 Neuchatel, Switzerland

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2015年 / 137卷 / 22期

关键词：

EVOLUTION REACTION; MOLYBDENUM CARBIDE; MECHANICAL-PROPERTIES; TITANIUM CARBIDE; H-2; EVOLUTION; EFFICIENT; ELECTROCATALYSTS; LAYER; FILMS;

D O I：

10.1021/jacs.5b03417

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Coupling of Earth-abundant hydrogen evolution catalysts to photoabsorbers is crucial for the production of hydrogen fuel using sunlight. In this work, we demonstrate the use of magnetron sputtering to deposit Mo2C as an efficient hydrogen evolution reaction catalyst onto surface-protected amorphous silicon (a-Si) photoabsorbers. The a-Si/Mo2C photocathode evolves hydrogen under simulated solar illumination in strongly acidic and alkaline electrolytes. Onsets of photocurrents are observed at potentials as positive as 0.85 V vs RHE. Under AM 1.5G (1 sun) illumination, the photocathodes reach current densities of -11.2 mA cm(-2) at the reversible hydrogen potential in 0.1 M H2SO4 and 1.0 M KOH. The high photovoltage and low-cost of the Mo2C/a-Si assembly make it a promising photocathode for solar hydrogen production.

引用

页码：7035 / 7038

页数：4

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