期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 204, 期 -, 页码 486-496出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2016.11.050
关键词
Core-shell structure; Nickel phosphide; Nickel phosphate; Bifunctional catalysts; Overall water splitting
资金
- National Natural Science Foundation of China [21373199, 21433003]
- Strategic Priority Research Program of CAS [XDA09030104]
- Jilin Province Science and Technology Development Program [20150101066JC, 20160622037JC]
- Recruitment Program of Foreign Experts [WQ20122200077]
Non-precious metal catalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are the cost-effective materials for overall water splitting. Here, we report that the core-shell structured Ni12P5/Ni-3(PO4)(2) hollow spheres (Ni12P5/Ni-3(PO4)(2)-HS) exhibits high activity and stability towards both HER and OER in strong alkaline media. A current density of 10 mA cm(-2) is generated at an overpotential of 0.114V and 0318 V in 1 M KOH for HER and OER, respectively. The high activity is attributed to the hollow core-shell (Ni12P5/Ni-3(PO4)(2)) structure that the material adopts under catalytic conditions. The Ni12P5/Ni-3(PO4)(2)-HS can serve as both cathode and anode catalysts for a real water electrolysis cell, which generates a current density of 357.6mA cm(-2) at 1.8V and stable at 300mA cm(-2) for at least 100h, the potential catalytic degradation mechanism has been systematically studied and discussed. (C) 2016 Elsevier B.V. All rights reserved.
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