摘要
Exploring highly active but inexpensive electrocatalysts for the hydrogen evolution reaction(HER)is of critical importance for hydrogen production from electrochemical water splitting.Herein,we report a multicomponent catalyst with exceptional activity and durability for HER,in which cobalt nanoparticles were in-situ confined inside bamboo-like carbon nanotubes(CNTs)while ultralow ruthenium loading(~2.6μg per electrode area~cm^(−2))is uniformly deposited on their exterior walls(Co@CNTsǀRu).The atomic-scale structural investigations and theoretical calculations indicate that the confined inner Co and loaded outer Ru would induce charge redistribution and a synergistic electron coupling,not only optimizing the adsorption energy of H intermediates(ΔGH*)but also facilitating the electron/mass transfer.The as-developed Co@CNTsǀRu composite catalyst requires overpotentials of only 10,32,and 63 mV to afford a current density of 10 mA cm^(−2) in alkaline,acidic and neutral media,respectively,representing top-level catalytic activity among all reported HER catalysts.The current work may open a new insight into the rational design of carbon-supported metal catalysts for practical applications.
基金
supported by“Shuguang Program”supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission Shaanxi Outstanding Youth Fund(2020JC-49)
Youth Innovation Team of University in Shaanxi Province(20SG03)
State Key Laboratory of New Textile Materials and Advanced Processing Technologies(No.FZ2021001)
Guangdong Basic and Applied Basic Research Foundation(2021A1515110496)
the Natural Science Basic Research Plan in Shaanxi Province of China(No.2022JQ-438).