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Efficient and stable PtFe alloy catalyst for electrocatalytic methanol oxidation with high resistance to CO

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Direct methanol fuel cells(DMFC)are widely considered to be an ideal green energy conversion device but their widespread applications are limited by the high price of the Pt-based catalysts and the instabil-ity in terms of surface CO toxicity in long-term operation.Herein,the PtFe alloy nanoparticles(NPs)with small particle size(～4.12 nm)supported on carbon black catalysts with different Pt/Fe atomic ratios(Pt1Fe2/C,Pt3Fe4/C,Pt1Fe1/C,and Pt2Fe1/C)are successfully prepared for enhanced anti-CO poisoning dur-ing methanol oxidation reaction(MOR).The optimal atomic ratio of Pt/Fe for the MOR is 1:2,and the mass activity of Pt1Fe2/C(5.40 A mgPt1)is 13.5 times higher than that of conventional commercial Pt/C(Pt/C-JM)(0.40 A mgpt1).The introduction of Fe into the Pt lattice forms the PtFe alloy phase,and the elec-tron density of Pt is reduced after forming the PtFe alloy.In-situ Fourier transform infrared results indicate that the addition of oxyphilic metal Fe has reduced the adsorption of reactant molecules on Pt during the MOR.The doping of Fe atoms helps to desorb toxic intermediates and regenerate Pt active sites,promoting the cleavage of C-O bonds with good selectivity of CO2(58.1％).Moreover,the Pt1Fe2/C catalyst exhibits higher CO tolerance,methanol electrooxidation activity,and long-term stability than other PtxFey/C catalysts.

Alloy catalystPtFeMethanol oxidationIn-situ FTIRCO resistance

Qian Yang、Sifan Zhang、Fengshun Wu、Lihua Zhu、Guang Li、Mingzhi Chen、An Pei、Yingliang Feng

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Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry,College of Chemistry and Chemical Engineering,Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China

College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China

国家自然科学基金国家自然科学基金Youth Jinggang Scholars Program in Jiangxi ProvinceThousand Talents Plan of Jiangxi ProvinceNatural Science Foundation of Jiangxi Province for Distinguished Young ScholarsProgram of Qingjiang Excellent Young Talents,Jiangxi University of Science and TechnologyResearch Foundation of Education Bureau of Jiangxi Province of ChinaFoundation of State Key Laboratory of Physical Chemistry of Solid Surfaces中国博士后科学基金Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry

2216201222202089[2019]57jxsq201920108320224ACB213005JXUSTQJBJ2019002GJJ2108332020222021M69389320212BCD42018

2024

10.1016/j.jechem.2023.11.038

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.90(3)
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