Modulating electronic structure of cobalt phosphide porous nanofiber by ruthenium and nickel dual doping for highly-efficiency overall water splitting at high current density

被引：119
作者：
Song, Yuyan [1 ]
Cheng, Jianlin [1 ]
Liu, Jiang [1 ]
Ye, Qing [1 ]
Gao, Xiang [1 ]
Lu, Jinjun [1 ]
Cheng, Yongliang [1 ]
机构：
[1] Northwest Univ, Coll Chem & Mat Sci, Key Lab Synthet & Nat Funct Mol, Minist Educ, Xian 710069, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2021年 / 298卷
基金：
中国国家自然科学基金;
关键词：
Cobalt phosphide; Dual-metal doping; Bifunctional; Overall water splitting; HYDROGEN EVOLUTION REACTION; BIFUNCTIONAL ELECTROCATALYST; COP; ALKALINE; OXYGEN; NANOARRAYS; NANOSHEETS;
D O I：
10.1016/j.apcatb.2021.120488
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 rational design and construction of high-efficiency bifunctional electrocatalysts are the central challenges for improving the overall water splitting efficiency. In this paper, Ru and Ni dual-metal doped CoP (Ru, Ni-CoP) porous nanofibers were fabricated. Dual-metal doping can be more efficiently used to modulate the electronic structure than single-metal doping, thereby, achieving decreased water dissociation energy and optimized adsorption energy for different reaction intermediates. Consequently, Ru, Ni-CoP porous nanofibers exhibit highly enhanced bifunctional activities. The electrolytic cell based on Ru, Ni-CoP porous nanofibers, which is significantly superior to Pt/C||IrO2 pairs, requires a low voltage of 1.448 and 1.757 V at 10 and 500 mA cm-2, respectively. The electrolytic cell exhibits excellent long-term stability at 400 mA cm-2. This excellent activity and stability at high-current density provides the considerable potential for the practical applications of Ru, NiCoP porous nanofibers as high-performance bifunctional electrocatalysts.
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页数：10
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