期刊
CHEMICAL ENGINEERING JOURNAL
卷 442, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.136337
关键词
Atomically dispersed ruthenium; Carbon aerogel; Hydrogen evolution reaction; Water splitting; pH-universal catalyst
资金
- National Key R&D Program of China [2019YFA0210300]
- National Natural Science Foundation of China [21972169, 21773311]
- Hunan Provincial Science and Technology Plan Project [2017TP1001]
- Postdoctoral Research Foundation of Central South Univer-sity [140050038]
- Fundamental Research Funds for the Central Universities of Central South University [1053320210029]
- National Science Foundation [CHE-2003685, CHE-1900235]
Carbon aerogel doped with atomically isolated Ru exhibits remarkable performance in hydrogen evolution reaction (HER) across a wide range of solution pH. The optimized sample shows ultra-low overpotential and high mass activity, surpassing the commercial Pt/C benchmark. This study highlights the unique advantages of carbon aerogel-based single atom catalysts in electrochemical energy technologies.
Development of cost-effective catalysts for hydrogen evolution reaction (HER) plays a significant role in scalable production of hydrogen. Herein, carbon aerogels doped with atomically isolated Ru are produced pyrolytically from biomass hydrogels and exhibit a remarkable performance in HER within a broad range of solution pH, due to the formation of abundant RuNx moieties. At the current density of 10 mA cm(-2), the optimal sample (NCAG/Ru-3) exhibits an ultralow overpotential of merely -4 mV in 1.0 M KOH, -45 mV in 1.0 M phosphate buffer solution and -65 mV in 0.5 M H2SO4, with the respective mass activity 44, 16 and 6 times that of commercial Pt/C benchmark. The excellent performance is also manifested in full water splitting. Theoretical calculations suggest that the high activity arise from the RuNx sites at the zigzag edges and nanowrinkles. These results underscore the unique quality of carbon aerogel-based single atom catalysts in electrochemical energy technologies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据