Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 1, Pages 745-752Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b16280
Keywords
Cu2OxS1-x; sulfur doping; hydrogen evolution reaction; oxygen evolution reaction; overall water splitting
Funding
- National Key Research and Development Program of China [2016YFA0200400]
- Natural Science Foundation of China [51571100, 24275064, 51602305]
- Program for JLU Science and Technology Innovative Research Team (JLUSTIRT) [2017TD-09]
- Fundamental Research Funds for the Central Universities
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Developing active and bifunctional noble metal-free electrocatalysts is crucial for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in the full water splitting process. A ternary nanoporous sulfur-doped copper oxide (Cu2OxS1-x) was successfully synthesized on Cu foam. The obtained Cu2OxS1-x/Cu shows robust electrocatalytic activity toward HER with a low overpotential of 40 mV at 10 mA cm(-2) and a Tafel slope of 68 mV dec(-1) and exhibits long-term stability in acid solution. Moreover, Cu2OxS1-x shows excellent electrocatalytic activity for OER, HER, and overall water splitting as a bifunctional catalyst in 1.0 M KOH electrolyte. The sulfur doping strategy implemented here can greatly improve the catalytic performance and stability in both acidic and alkaline water electrolyzers and presents an efficient catalyst for overall water splitting.
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