Abstract
The development of cost-effective electrocatalysts with high efficiency and long durability for hydrogen evolution reaction(HER)remains a great challenge in the field of water splitting.Herein,we design an ultrafine and highly dispersed Ru nanoparticles stabilized on porous V8C7/C matrix via pyrolysis of the metal-organic frameworks V-BDC(BDC:1,4-benzenedicarboxylate).The obtained Ru-V8C7/C composite exhibits excellent HER performance in all pH ranges.At the overpotential of 40 mV,its mass activity is about 1.9,4.1 and 9.4 times higher than that of commercial Pt/C in acidic,neutral and alkaline media,respectively.Meanwhile,Ru-V8C7/C shows the remarkably high stability in all pH ranges which,in par-ticular,can maintain the current density of 10 mA cm-2 for over 150 h in 1.0 mol L-1 phosphate buffer saline(PBS).This outstanding HER performance can be attributed to the high intrinsic activity of Ru spe-cies and their strong interface interactions to the V8C7/C substrate.The synergistic effect of abundant active sites on the surface and the formed Ru-C-V units at the interface promotes the adsorption of reac-tion intermediates and the release of active sites,contributing the fast HER kinetics.This work provides a reference for developing versatile and robust HER catalysts by surface and interface regulation for pH tolerance.
基金项目
Overseas High-level Talents Plan of China and Guangdong Province()
100 Talents Plan Foundation of Sun Yatsen University()
中央高校基本科研业务费专项()
Program for Guangdong Introducing Innovative and Entrepreneurial Teams(2017ZT07C069)
国家自然科学基金(22075321)
国家自然科学基金(21821003)
国家自然科学基金(21890380)
国家自然科学基金(22375223)
Guangdong Basic Research Center of Excellence for Functional Molecular Engineering()
广东省自然科学基金(2021A1515010068)
NETL
NSTL
万方数据