期刊
NANOSCALE
卷 9, 期 11, 页码 3995-4001出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr00460e
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资金
- Ministry of Science and Technology of China [2016YFA0200700]
- National Natural Science Foundation of China [21373065, 61474033, 61574050, 11674072]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09040201]
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication
- Youth Innovation Promotion Association CAS
Developing earth-abundant and efficient bifunctional electrocatalysts for realizing the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under alkaline conditions is an intriguing challenge. Here, ternary necklace-like CoP2xSe2(1-x) nanowire arrays are synthesized via simultaneously phosphorizing and selenizing Co(OH)(2) nanowires. Owing to the substitution of the P atom in the ternary system, the optimal electronic structure of CoP2xSe2(1-x) can be obtained and the stability can also be enhanced for hydrogen evolution. Thus, the ternary CoP2xSe2(1-x) NWs are highly active for electrochemical hydrogen evolution in both acidic and alkaline media, achieving a current density of 10 mA cm (-2) at overpotentials of 70 mV and 98 mV, respectively. To realize the overall water splitting, we further performed the experiment using the CoP2xSe2(1-x) NWs as a cathode and Co(OH)(2) NWs as an anode, which requires a cell voltage of 1.65 V to afford a water splitting current density of 10 mA cm (-2) in strong alkaline media (1.0 M KOH).
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