期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 5, 页码 4689-4696出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b16430
关键词
bifunctional eletrocatalyst; heterostructures; nickel phosphide; nickel sulfide; overall water splitting
资金
- NSFC Major International (Regional) Joint Research Project NSFC-SNSF [51661135023]
- NSFC [21673091]
- 973 Program of China [2014CB643506]
- Fundamental Research Funds for the Central Universities [HUST: 2016YXMS031]
- WNLO
- Open Funds of the State Key Laboratory of Electroanalytical Chemistry [SKLEAC201607]
- Australian Research Council Discovery project [DP160103107]
Developing high-active and low-cost bifunctional materials for catalyzing the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) holds a pivotal role in water splitting. Therefore, we present a new strategy to form NiS/Ni2P heterostructures. The as-obtained NiS/Ni2P/carbon cloth (CC) requires overpotentials of 111 mV for the HER and 265 mV for the OER to reach a current density of 20 mA cm(-2), outperforming their counterparts such as NiS and Ni2P under the same conditions. Additionally, the NiS/Ni2P/CC electrode requires a 1.67 V cell voltage to deliver 10 mA cm(-2) in a two-electrode electrolysis system, which is comparable to the cell using the benchmark Pt/C parallel to RuO2 electrode. Detailed characterizations reveal that strong electronic interactions between NiS and Ni2P, abundant active sites, and smaller charge-transfer resistance contribute to the improved HER and OER activity.
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