Hierarchical three-dimensional framework interface assembled from oxygen-doped cobalt phosphide layer-shelled metal nanowires for efficient electrocatalytic water splitting

被引：111

作者：

Thi Luu Luyen Doan ^{[1
]}

Duy Thanh Tran ^{[1
]}

Dinh Chuong Nguyen ^{[1
]}

Huu Tuan Le ^{[1
]}

Nam Hoon Kim ^{[1
]}

Joong Hee Lee ^{[1
,2
]}

机构：

[1] Jeonbuk Natl Univ, Dept BIN Convergence Technol, Adv Mat Inst BIN Convergence Technol BK21 Plus Gl, Jeonju 54896, Jeonbuk, South Korea

[2] Jeonbuk Natl Univ, Dept Polymer & Nanosci & Technol, Carbon Composite Res Ctr, Jeonju 54896, Jeonbuk, South Korea

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 261卷

关键词：

Oxygen-doped cobalt phosphide layer; 1D copper-based nanowires; Core-shell structure; Bifunctional electrocatalyst; Overall water splitting; HYDROGEN EVOLUTION REACTION; BIFUNCTIONAL ELECTROCATALYST; COP NANOPARTICLES; CARBON CLOTH; CATALYSTS; NANOSTRUCTURES; NICKEL; SURFACE; SULFUR; ARRAYS;

D O I：

10.1016/j.apcatb.2019.118268

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：

A novel hierarchical electrocatalyst of oxygen-doped cobalt phosphide layer-shelled copper nanowires vertically attached on surface of three-dimensional framework was fabricated through a simple and cost-effective approach. Such unique architecture was demonstrated to produce significant defects and modulated surface chemistry with rich-electroactive sites, adjusted adsorption energy, and enhanced surface area owning abundant channels for diffusion process. The catalyst achieved low overpotentials of 101 and 270 mV to acquire current response of 10 mA cm(-2) towards hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline, respectively. Rapid kinetics were also obtained with low Tafel slopes of 69.4 mV dec(-1) for HER and 74.4 mV dec(-1) for OER. A practical electrolyzer of the electrocatalyst for water splitting exhibited small cell voltages of 1.54 and 1.71 Vat 10 and 50 mA cm(-2), respectively, along with excellent stability, which are superior to those of a similar device based on RuO2-C + Pt-C.

引用

页数：13

共 70 条

[1] Mechanistic insight into oxygen evolution electrocatalysis of surface phosphate modified cobalt phosphide nanorod bundles and their superior performance for overall water splitting [J].