Implanting Ru nanoclusters into N-doped graphene for efficient alkaline hydrogen evolution

被引：52
作者：
Li, Yang [1 ,2 ,3 ]
Luo, Yuting [2 ,3 ]
Zhang, Zhiyuan [2 ,3 ]
Yu, Qiangmin [2 ,3 ]
Li, Can [4 ]
Zhang, Qi [1 ]
Zheng, Zhi [1 ]
Liu, Huakun [1 ]
Liu, Bilu [2 ,3 ]
Dou, Shixue [1 ]
机构：
[1] Univ Wollongong, Inst Supercond & Elect Mat, Wollongong, NSW 2522, Australia
[2] Tsinghua Univ, Shenzhen Geim Graphene Ctr SGC, Tsinghua Berkeley Shenzhen Inst TBSI, Shenzhen 518055, Peoples R China
[3] Tsinghua Univ, Inst Mat Res, Tsinghua Shenzhen Int Grad Sch TSIGS, Shenzhen 518055, Peoples R China
[4] China Jiliang Univ, Coll Opt & Elect Technol, Inst Optoelect Mat & Devices, Hangzhou 310018, Peoples R China
来源：
CARBON | 2021年 / 183卷
基金：
澳大利亚研究理事会; 美国国家科学基金会;
关键词：
Alkaline hydrogen evolution; Electrocatalyst; Ru nanocluster; Water dissociation; Density functional theory; AT-NI; CARBON; ELECTROCATALYST; NANOPARTICLES; CATALYSIS; SUPERIOR; SITES; PH;
D O I：
10.1016/j.carbon.2021.07.039
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：
Electrocatalytic hydrogen evolution reaction (HER) in alkaline media is important for low-cost hydrogen production in industry. Developing catalysts with ultrafast water dissociation kinetics and decent activity are main challenges for alkaline HER. Here, we report a two-step pyrolysis method to construct Ru nanoclusters uniformly deposited on nitrogen-doped graphene for efficient alkaline HER. The catalyst shows an exceptional intrinsic activity with a low overpotential of 25.9 mV at 10 mA cm(-2) and a low Tafel slope of 32.6 mV dec(-1) in alkaline media. Density functional theory calculations indicate that the Ru-based nanoclusters exhibit good ability for water dissociation, giving rise to the superior hydrogen evolution activity. This work shines fresh light on fabricating highly efficient catalysts for alkaline HER, as well as provides a deep insight on the reaction mechanism of Ru-based catalysts under alkaline conditions. (C) 2021 Published by Elsevier Ltd.
引用
收藏
页码：362 / 367
页数：6
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