期刊
ACS CATALYSIS
卷 5, 期 7, 页码 4115-4120出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.5b00556
关键词
copper electrode; cuprous oxide; phosphate; electrocatalysis; hydrogen evolution
资金
- Energy Research Institute @ Nanyang Technological University (ERI@N)
- Singapore-Berkeley Research Initiative for Sustainable Energy (SinBeRISE) CREATE
- Centre for Artificial Photosynthesis (CAP-NTU)
- SinBeRISE CREATE
A phosphate mediated (photo)electro-reduction process has been developed to activate cuprous oxide (Cu2O) to copper-cuprous oxide (Cu/Cu2O) for high efficient hydrogen evolution reaction (HER) in water at neutral pH. The activated copper-based electrode can efficiently catalyze HER with an impressive onset potential of -30 mV vs reversible hydrogen electrode (RHE), low Tafel slope of 60-80 mV.decade(-1) and exchange current density j(0) of 3.0 x 10(-5) A.cm(-2). This represents the first highly active copper-based electrocatalyst that could be used as a low-cost alternative to Pt for water electrolysis.
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