Affiliation:
1. Key Laboratory of Green Chemistry and Technology of Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
2. CAS Key Laboratory of Urban Pollutant Conversion Department of Applied Chemistry University of Science and Technology of China Hefei 230026 China
Abstract
AbstractHigh‐entropy alloys (HEAs) have offered wide opportunities for materials discovery, property optimization, and application exploration. In spite of some encouraging progress, manipulating HEAs with functional morphology/mesostructure and controlled chemical orderliness remains a big challenge. In this manuscript, a powerful and general strategy to synthesizing libraries of mesoporous high‐entropy intermetallics (MHEIs) with controlled orderliness in both mesoscopic and atomic levels is reported for the first time. Final products feature an ordered polyhedral morphology and double‐gyroid mesostructure as well as long‐range L10 intermetallic phase and HEA composition, delivering multiple advantages for enhancing electrochemical performance in oxygen reduction reaction (ORR) and single rechargeable zinc–air battery. Specifically, MHEI‐PtPdFeCoNi affords remarkable ORR activity (0.63 A mg−1 for mass activity and 1.01 mA cm−2 for specific activity) and superior stability (≈87% activity retained for 50 000 cycles and chronoamperometry tests) compared with the MHEAs with disordered atomic arrangement and commercial Pt/C. The excellent performance comes from the optimized surface HEA multimetallization as well as ordered intermetallic and mesoporous structure that changes the chemisorption of O*/OH* intermediates and lowers the overall energy barrier of oxygen reduction.
Funder
Natural Science Foundation of Sichuan Province
Fundamental Research Funds for the Central Universities
Subject
General Materials Science,Renewable Energy, Sustainability and the Environment
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献