Tuning Mixed Nickel Iron Phosphosulfide Nanosheet Electrocatalysts for Enhanced Hydrogen and Oxygen Evolution

被引:282
作者
Song, Bo [1 ]
Li, Kai [2 ]
Yin, Ying [3 ]
Wu, Tao [4 ]
Dang, Lianna [4 ]
Caban-Acevedo, Miguel [4 ]
Han, Jiecai [3 ]
Gao, Tangling [5 ]
Wang, Xianjie [1 ]
Zhang, Zhihua [6 ]
Schmidt, J. R. [4 ]
Xu, Ping [2 ]
Jin, Song [4 ]
机构
[1] Harbin Inst Technol, Acad Fundamental & Interdisciplinary Sci, Dept Phys, Harbin 150001, Heilongjiang, Peoples R China
[2] Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers, Harbin 150001, Heilongjiang, Peoples R China
[3] Harbin Inst Technol, Ctr Composite Mat & Struct, Harbin 150001, Heilongjiang, Peoples R China
[4] Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA
[5] Heilongjiang Acad Sci, Inst Petrochem, Harbin 150040, Heilongjiang, Peoples R China
[6] Dalian Jiaotong Univ, Sch Mat Sci & Engn, Dalian 116028, Peoples R China
来源
ACS CATALYSIS | 2017年 / 7卷 / 12期
基金
中国国家自然科学基金; 对外科技合作项目(国际科技项目); 美国国家科学基金会;
关键词
nickel iron phosphosulfide; nanosheet; electrocatalysts; hydrogen evolution; oxygen evolution; SITU ELECTROCHEMICAL OXIDATION; AUGMENTED-WAVE METHOD; WIDE PH RANGE; WATER OXIDATION; BIFUNCTIONAL ELECTROCATALYST; EFFICIENT ELECTROCATALYST; MOLYBDENUM-DISULFIDE; CATALYSTS; PHOSPHIDE; NI;
D O I
10.1021/acscatal.7b02575
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
Highly efficient earth-abundant electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are of great importance for renewable energy conversion systems. Herein, guided by theoretical calculations, we demonstrate highly efficient water splitting in alkaline solution using quarternary mixed nickel iron phosphosulfide (Ni1-xFexPS3) nanosheets (NSs), even though neither NiPS3 nor FePS3 is a good HER (or OER) electrocatalyst. With tuned electronic structure and improved electrical conductivity induced by mixing appropriate amount of Fe into NiPS3, Ni09Fe0.1PS3 NSs display excellent HER activity (an overpotential of 72 mV vs reversible hydrogen electrode (RHE) at a geometric catalytic current density of -10 mA cm(-2) and a Tafel slope of 73 mV dec(-1)), which is among the best HER catalysts under alkaline conditions. Ni0.9Fe0.1PS3 NSs also show a good apparent OER activity (an overpotential of 329 mV vs RHE at a catalytic current density of 20 mA cm(-2) and a Tafel slope of 69 mV dec(-1)), although structural investigation indicates the formation of Ni(Fe)OOH and Ni(Fe)(OH), layers on the catalyst surface after OER reactions as likely the real active species. These mixed nickel iron phosphosulfide non-precious-metal electrocatalysts with enhanced intrinsic activity and long-term stability and durability should have great potential in overall water-splitting applications.
引用
收藏
页码:8549 / 8557
页数:9
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