无机材料学报2025，Vol.40Issue(4)：379-387,中插8-中插12,14.DOI:10.15541/jim20240402
Pt-Fe/GO纳米催化剂的制备及其电催化乙醇氧化性能研究
Pt-Fe/GO Nanocatalysts:Preparation and Electrocatalytic Performance on Ethanol Oxidation
摘要
Abstract
Direct ethanol fuel cells(DEFC)have garnered significant attention due to their high energy conversion efficiency,low noise levels,and environmental friendliness.However,these fuel cells still face challenges such as high catalyst costs,poor stability,and low catalytic activity.In this study,graphene oxide(GO)was utilized as support,glycol as reducing agent,and hexahydrate chloroplatinic acid as precursor to introduce non-noble metal iron(Fe).By adjusting the molar ratio of Pt to Fe,a series of PtFex/GO(x=1/6,1/5,1/4,1/3,1/2,1)binary alloy catalysts were synthesized using microwave-assisted heating,and nanocrystals were in situ loaded on GO support.Fe with small atomic radii was incorporated into the lattice of Pt,resulting in reduction in spacing between adjacent atoms and lattice contraction,forming Pt-Fe alloy.Electrochemical performance tests demonstrated that the catalyst specifically at x=1/3 exhibited optimal catalytic activity with an electrocatalytic active area of 69.84 m2/g,an oxidation peak current density of 858.42 A/g,and a smaller Tafel slope.Its 1100 s steady stable current was 194.80 A/g,with CO oxidation peak potential of 0.554 V,activation energy of 18.37 kJ/mol,and current density retention rate of 80.48％after 800 cycles,all surpassing the performance of commercial Pt/C(JM).This study shows that incorporating the less expensive Fe can significantly enhance the catalytic activity and stability of Pt-based catalysts,providing important theoretical foundations for the design and potential applications of Pt-based catalyst materials.关键词
直接乙醇燃料电池(DEFC)/原位负载/二元合金催化剂/微波加热合成法Key words
direct ethanol fuel cell(DEFC)/in situ load/binary alloy catalyst/microwave heating synthesis分类
动力与电气工程引用本文复制引用
信震宇,郭瑞华,乌仁托亚,王艳,安胜利,张国芳,关丽丽..Pt-Fe/GO纳米催化剂的制备及其电催化乙醇氧化性能研究[J].无机材料学报,2025,40(4):379-387,中插8-中插12,14.基金项目
国家自然科学基金(51864040,51962028,52162010) （51864040,51962028,52162010）
内蒙古自治区科技计划(2021GG0042) （2021GG0042）
内蒙古自治区高等学校青年科技英才(NJYT22064) （NJYT22064）
内蒙古自治区自然科学基金(2022MS05018,2022LHMS05021)National Natural Science Foundation of China(51864040,51962028,52162010) （2022MS05018,2022LHMS05021）
Inner Mongolia Autonomous Region Science and Technology Program(2021GG0042) （2021GG0042）
Inner Mongolia Autonomous Region Youth Science and Technology Excellence in Higher Education(NJYT22064) （NJYT22064）
Inner Mongolia Autonomous Region Natural Science Foundation Program(2022MS05018,2022LHMS05021) （2022MS05018,2022LHMS05021）
