气候变化领域集成服务门户(CCPortal): Boosting alkaline hydrogen evolution: The dominating role of interior modification in surface electrocatalysis

CCPortal

DOI	10.1039/d0ee01750g
	Boosting alkaline hydrogen evolution: The dominating role of interior modification in surface electrocatalysis
	Li Z.; Niu W.; Yang Z.; Kara A.; Wang Q.; Wang M.; Gu M.; Feng Z.; Du Y.; Yang Y.
发表日期	2020
ISSN	17545692
起始页码	3110
结束页码	3118
卷号	13 期号:9
英文摘要	The alkaline hydrogen evolution reaction (A-HER) holds great promise for clean hydrogen fuel generation but its practical utilization is severely hindered by the sluggish kinetics for water dissociation in alkaline solutions. Traditional ways to improve the electrochemical kinetics for A-HER catalysts have been focusing on surface modification, which still can not meet the demanding requirements for practical water electrolysis because of catalyst surface deactivation. Herein, we report an interior modification strategy to significantly boost the A-HER performance. Specifically, a trace amount of Pt was doped in the interior Co2P (Pt-Co2P) to introduce a stronger dopant-host interaction than that of the surface-modified catalyst. Consequently, the local chemical state and electronic structure of the catalysts were adjusted to improve the electron mobility and reduce the energy barriers for hydrogen adsorption and H-H bond formation. As a proof-of-concept, the interior-modified Pt-Co2P shows a reduced onset potential at near-zero volts for the A-HER, low overpotentials of 2 mV and 58 mV to achieve 10 and 100 mA cm-2, and excellent durability for long-term utilization. The interior-modified Pt-Co2P delivers superior A-HER performance to Pt/C and other state-of-the-art electrocatalysts. This work will open a new avenue for A-HER catalyst design. This journal is © The Royal Society of Chemistry.
英文关键词	Alkalinity; Chemical bonds; Electrocatalysis; Electrocatalysts; Electronic structure; Gas adsorption; Hydrogen evolution reaction; Reaction kinetics; Alkaline solutions; Catalyst surfaces; Electrochemical kinetics; Hydrogen adsorption; Hydrogen evolution; Sluggish kinetics; Water dissociation; Water electrolysis; Hydrogen fuels; alkalinity; catalysis; catalyst; concentration (composition); electrochemistry; hydrogen
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189547
作者单位	Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32826, United States; NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, United States; Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Department of Physics, University of Central Florida, Orlando, FL 32826, United States; Energy Conversion and Propulsion Cluster, University of Central Florida, Orlando, FL 32826, United States; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China; School of Chemical Biological, and Environmental Engineering, Oregon State University, Corvallis, OR 97331, United States
推荐引用方式 GB/T 7714	Li Z.,Niu W.,Yang Z.,et al. Boosting alkaline hydrogen evolution: The dominating role of interior modification in surface electrocatalysis[J],2020,13(9).
APA	Li Z..,Niu W..,Yang Z..,Kara A..,Wang Q..,...&Yang Y..(2020).Boosting alkaline hydrogen evolution: The dominating role of interior modification in surface electrocatalysis.Energy & Environmental Science,13(9).
MLA	Li Z.,et al."Boosting alkaline hydrogen evolution: The dominating role of interior modification in surface electrocatalysis".Energy & Environmental Science 13.9(2020).