Electrodeposited Cobalt-Phosphorous-Derived Films as Competent Bifunctional Catalysts for Overall Water Splitting

被引：821

作者：

Jiang, Nan ^{[1
]}

You, Bo ^{[1
]}

Sheng, Meili ^{[1
]}

Sun, Yujie ^{[1
]}

机构：

[1] Utah State Univ, Dept Chem & Biochem, Logan, UT 84322 USA

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2015年 / 54卷 / 21期

基金：

美国国家科学基金会;

关键词：

electrocatalysts; nonprecious metal catalysts; overall water splitting; potentiodynamic deposition; ELECTROCATALYTIC HYDROGEN EVOLUTION; OXYGEN-EVOLVING CATALYST; PHOSPHIDE NANOPARTICLES; GENERATING HYDROGEN; SULFIDE FILMS; NANOWIRE; CATHODE; FE; IDENTIFICATION; ARRAYS;

D O I：

10.1002/anie.201501616

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

One of the challenges to realize large-scale water splitting is the lack of active and low-cost electrocatalysts for its two half reactions: H-2 and O-2 evolution reactions (HER and OER). Herein, we report that cobalt-phosphorous-derived films (Co-P) can act as bifunctional catalysts for overall water splitting. The as-prepared Co-P films exhibited remarkable catalytic performance for both HER and OER in alkaline media, with a current density of 10mAcm(-2) at overpotentials of -94mV for HER and 345mV for OER and Tafel slopes of 42 and 47mV/dec, respectively. They can be employed as catalysts on both anode and cathode for overall water splitting with 100% Faradaic efficiency, rivalling the integrated performance of Pt and IrO2. The major composition of the as-prepared and post-HER films are metallic cobalt and cobalt phosphide, which partially evolved to cobalt oxide during OER.

引用

页码：6251 / 6254

页数：4

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