Cation Exchange Strategy to Single-Atom Noble-Metal Doped CuO Nanowire Arrays with Ultralow Overpotential for H2O Splitting
Xu, HT (Xu, Haitao)[ 2,3,4 ] ; Liu, TY (Liu, Tianyang)[ 1 ] ; Bai, SX (Bai, Shuxing)[ 2 ] ; Li, LG (Li, Leigang)[ 2 ] ; Zhu, YM (Zhu, Yiming)[ 2 ] ; Wang, J (Wang, Juan)[ 2 ] ; Yang, SZ (Yang, Shize)[ 5 ] ; Li, YF (Li, Yafei)[ 1 ]*（李亚飞）; Shao, Q (Shao, Qi)[ 2 ] ; Huang, XQ (Huang, Xiaoqing)[ 2,3 ]*

[ 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

NANO LETTERS，202007,20(7),5482-5489

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).

文章链接：
https://pubs.acs.org/doi/10.1021/acs.nanolett.0c02007

版权与免责声明：本网页的内容由收集互联网上公开发布的信息整理获得。目的在于传递信息及分享，并不意味着赞同其观点或证实其真实性，也不构成其他建议。仅提供交流平台，不为其版权负责。如涉及侵权，请联系我们及时修改或删除。邮箱：sales@allpeptide.com