articleScientific ReportsOct 17, 2016GOLD OA

Cu2O/CuO Bilayered Composite as a High-Efficiency Photocathode for Photoelectrochemical Hydrogen Evolution Reaction

YYYang YangDXDi XuQWQingyong WuPDPeng Diao

Beihang University

PubMed
Indexed incrossrefdoajpubmed

Abstract

Abstract Solar powered hydrogen evolution reaction (HER) is one of the key reactions in solar-to-chemical energy conversion. It is desirable to develop photocathodic materials that exhibit high activity toward photoelectrochemical (PEC) HER at more positive potentials because a higher potential means a lower overpotential for HER. In this work, the Cu 2 O/CuO bilayered composites were prepared by a facile method that involved an electrodeposition and a subsequent thermal oxidation. The resulting Cu 2 O/CuO bilayered composites exhibited a surprisingly high activity and good stability toward PEC HER, expecially at high potentials in alkaline solution. The photocurrent density for HER was 3.15 mA·cm −2 at the…

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Topics & keywords

Topics
Keywords
  • Photocathode
  • Photocurrent
  • Materials science
  • Heterojunction
  • Water splitting
  • Overpotential
  • Oxide
  • Chemical engineering
UN Sustainable Development Goals
  • Affordable and clean energy
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