Urchin-like ternary cobalt phosphosulfide as high-efficiency and stable bifunctional electrocatalyst for overall water splitting

被引：38
作者：
Hu, Guojing [1 ]
Xiang, Junxiang [1 ]
Li, Jing [1 ]
Liu, Ping [1 ]
Ali, Rai Nauman [1 ]
Xiang, Bin [1 ]
机构：
[1] Univ Sci & Technol China, Hefei Natl Res Ctr Phys Sci Microscale, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China
来源：
JOURNAL OF CATALYSIS | 2019年 / 371卷
基金：
中国国家自然科学基金;
关键词：
Ternary CoPS; Oxygen evolution reaction; Hydrogen evolution reaction; Overall water splitting; OXYGEN EVOLUTION REACTION; HIGH-PERFORMANCE; NICKEL FOAM; NANOSHEETS; CATALYST; PYRITE; HETEROSTRUCTURES; NANOCRYSTALS; GRAPHENE; COPPER;
D O I：
10.1016/j.jcat.2019.01.039
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The development of efficient non-noble bifunctional electrocatalysts for the overall water splitting is a pressing and challenging task. In this work, we report a sea urchin-like cobalt phosphosulfide (CoPS) ternary compound for overall water splitting. Because CoPS contains more than one nonmetallic element, ternary compounds possess dianions might lead to modulated electronic structure and thus modified their electrocatalytic properties. Our DFT calculation results reveal that the ternary CoPS exhibits favorable performance for both the oxygen evolution reaction and hydrogen evolution reaction. Experimentally set as cathode and anode in a full cell for overall water splitting, the CoPS cell needs a voltage of only similar to 1.59 V to reach a current density of 10 mA cm(-2) and has outstanding stability. Our results open up a path to search for alternative bifunctional electrocatalyst materials to substitute for noble metals in overall water splitting. (C) 2019 Elsevier Inc. All rights reserved.
引用
收藏
页码：126 / 134
页数：9
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