Facile sol-gel preparation of high-entropy multielemental electrocatalysts for efficient oxidation of methanol and urea
作者机构:Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026China School of BiologyFood and EnvironmentHefei UniversityHefei 230022China
出 版 物:《Nano Research》 (纳米研究(英文版))
年 卷 期:2022年第15卷第6期
页 面:5014-5023页
核心收录:
学科分类:081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程(可授工学、理学学位)] 0703[理学-化学] 0702[理学-物理学]
基 金:supported by the National Natural Science Foundation of China(Nos.21778052 and 21975240) by the Fundamental Research Funds for the Central Universities(No.WK2060190102)
主 题:catalytic oxidation reaction high-entropy multi-elemental electrocatalysts sol-gel formic acid
摘 要:High-entropy multi-elemental(HEM)electrocatalysts present superior catalytic performance due to the efficient synergism of their *** electrocatalysts are usually prepared through hydrothermal reactions or calcination,which could generate undesired heterogeneous structures that hinder the exploration of the structure–property relationship of these HEM ***,we report a sol-gel method to synthesize homogeneous HEM electrocatalysts for electro-oxidation of methanol and urea(methanol oxidation reaction(MOR)and urea oxidation reaction(UOR)),through an acid-catalyzed gelation at room *** Ni as the primary component for MOR and UOR,Co can reduce the overpotentials,while Fe can increase the catalytic activities and *** and phosphate can tune the charge distribution in active sites and speed up the reaction kinetics through fast proton ***,the optimal Ni_(2)Fe_(0.5)Co_(0.5)-BP HEM catalyst demonstrates superior catalytic activity together with good durability and great resistance to CO *** addition,a direct methanol fuel cell with Ni_(2)Fe_(0.5)Co_(0.5)-BP electrode can not only provide power,but also produce formic acid with high yield and high Faraday *** work presents a simple strategy to prepare high-performance HEM electrocatalysts for fuel cells and production of valueadded chemicals.