Cation Exchange Strategy to Single-Atom Noble-Metal Doped CuO Nanowire Arrays with Ultralow Overpotential for H2O Splitting

被引：112

作者：

Xu, Haitao ^{[2
,3
,4
]}

Liu, Tianyang ^{[1
]}

Bai, Shuxing ^{[2
]}

Li, Leigang ^{[2
]}

Zhu, Yiming ^{[2
]}

Wang, Juan ^{[2
]}

Yang, Shize ^{[5
]}

Li, Yafei ^{[1
]}

Shao, Qi ^{[2
]}

Huang, Xiaoqing ^{[2
,3
]}

机构：

[1] Nanjing Normal Univ, Coll Chem & Mat Sci, Nanjing 210023, Peoples R China

[2] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Nanjing 215123, Jiangsu, Peoples R China

[3] Xiamen Univ, Coll Chem & Chem Engn, Xiamen 361005, Fujian, Peoples R China

[4] Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China

[5] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

来源：

NANO LETTERS | 2020年 / 20卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Nanowire Array; Cation Exchange; Single Atom; Noble Metal; Water Splitting; HYDROFORMYLATION; ROBUST;

D O I：

10.1021/acs.nanolett.0c02007

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Single-atom site catalysts (SACs) have aroused enormous attention and brought about new opportunities for many applications. Herein, we report a versatile strategy to rhodium (Rh) SAC by a facile cation exchange reaction. Remarkably, the Rh SAC modified CuO nanowire arrays on copper foam (Rh SAC-CuO NAs/CF) show unprecedented alkaline oxygen evolution reaction (OER) activity with a high current density of 84.5 mA cm(-2)@1.5 V vs reversible hydrogen electrode (RHE), 9.7 times that of Ir/C/CF. More strikingly, when used as an anode and a cathode for overall water splitting, the Rh SAC-CuO NAs/CF can achieve 10 mA cm(-2) at only 1.51 V. Density functional theory calculations reveal that the high OER and HER intrinsic catalytic activities result from moderate adsorption energy of intermediates on Rh SAC. Finally, we demonstrate the general synthesis of different single-atom noble-metal catalysts on CuO NAs (M SAC-CuO NAs/CF, where M = Ru, Ir, Os, and Au).

引用

页码：5482 / 5489

页数：8

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