Hollow Mo-doped CoP nanoarrays for efficient overall water splitting

被引：666

作者：

Guan, Cao ^{[1
]}

Xiao, Wen ^{[1
]}

Wu, Haijun ^{[1
]}

Liu, Ximeng ^{[1
]}

Zang, Wenjie ^{[1
]}

Zhang, Hong ^{[1
]}

Ding, Jun ^{[1
]}

Feng, Yuan Ping ^{[2
]}

Pennycook, Stephen J. ^{[1
]}

Wang, John ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117574, Singapore

[2] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

来源：

NANO ENERGY | 2018年 / 48卷

关键词：

Hollow nanoarrays; Binder-free; Metal phosphide; Electrochemical electrocatalyst; 2D metal-organic framework; HYDROGEN EVOLUTION REACTION; GENERALIZED GRADIENT APPROXIMATION; HIGH CATALYTIC-ACTIVITY; OXYGEN EVOLUTION; BIFUNCTIONAL ELECTROCATALYSTS; HIGHLY EFFICIENT; NANOWIRE ARRAYS; SURFACE; NANOSHEETS; GENERATION;

D O I：

10.1016/j.nanoen.2018.03.034

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：

Earth-abundant, efficient and durable electrocatalysts for water splitting are vitally important for a sustainable energy system. Here we report the rational design of hollow Mo-doped CoP (Mo-CoP) nanoarrays, which simultaneously combine electronic structure modification through doping with a high density of reaction sites through nanostructuring. With this strategy the Mo-CoP arrays give significantly improved hydrogen evolution reaction (HER) performance, and also, when in situ transformed into Mo-doped CoOOH (Mo-CoOOH) arrays, excellent activity towards the oxygen evolution reaction (OER) is obtained. The origin of the improvement is determined by atomic-resolution imaging combined with density functional theory (DFT). An electrolyzer using Mo-CoP and Mo-CoOOH can be powered by a single AA battery (similar to 1.5 V), and maintains a stable water-splitting current for 20 h, superior to most reported electrocatalysts in alkaline media, offering great promise for practical applications.

引用

页码：73 / 80

页数：8

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