首页|Unraveling the role of iron on Ni-Fe alloy nanoparticles during the electrocatalytic ethanol-to-acetate process

Unraveling the role of iron on Ni-Fe alloy nanoparticles during the electrocatalytic ethanol-to-acetate process

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The anodic electrooxidation of ethanol to value-added acetate is an excellent example of replacing the oxygen evolution reaction to promote the cathodic hydrogen evolution reaction and save energy.Herein,we present a colloidal strategy to produce Ni-Fe bimetallic alloy nanoparticles(NPs)as efficient electrocatalysts for the electrooxidation of ethanol in alkaline media.Ni-Fe alloy NPs deliver a current density of 100 mA·cm-2 in a 1.0 M KOH solution containing 1.0 M ethanol merely at 1.5 V vs.reversible hydrogen electrode(RHE),well above the performance of other electrocatalysts in a similar system.Within continuous 10 h testing at this external potential,this electrode is able to produce an average of 0.49 mmol-cm-2·h-1 of acetate with an ethanol-to-acetate Faradaic efficiency of 80％.A series of spectroscopy techniques are used to probe the electrocatalytic process and analyze the electrolyte.Additionally,density functional theory(DFT)calculations demonstrate that the iron in the alloy NPs significantly enhances the electroconductivity and electron transfer,shifts the rate-limiting step,and lowers the energy barrier during the ethanol-to-acetate reaction pathway.

electrocatalysisethanol oxidation reactionalloy nanoparticleacetatebiorefinery

Junshan Li、Luming Li、Xinyu Ma、Jun Wang、Jun Zhao、Yu Zhang、Ren He、Yaoyue Yang、Andreu Cabot、Yongfa Zhu

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Institute for Advanced Study,Chengdu University,610106 Chengdu,China

State Key Laboratory of Environmental-Friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China

College of Food and Biological Engineering,Chengdu University,Chengdu 610106,China

School of Chemistry and Environment,Southwest Minzu University,Chengdu 610041,China

Hebei Key Laboratory of Photoelectric Control on Surface and Interface,College of Science,Hebei University of Science and Technology,Shijiazhuang 050018,China

Catalonia Institute for Energy Research-IREC,Sant Adrià de Besòs,Barcelona 08930,Catalonia,Spain

ICREA,Pg.Lluís Companys 23,Barcelona 08010,Catalonia,Spain

Department of Chemistry,Tsinghua University,Beijing 100084,China

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Natural Science Foundation of Sichuan Provinceopen project from Hebei Key Laboratory of Photoelectric Control on Surface and InterfaceChina Postdoctoral Science FoundationEuropean Regional Development FundsSpanish Ministerio de Ciencia e Innovación through the project COMBENERGYNational Natural Science Foundation of China(NSFC)Fundamental Research Funds for the Central Universities,Southwest Minzu University

2022NSFSC1229ZD20220032023MD734228PID2019-105490RB-C3222172121xiao2021102

2024

10.1007/s12274-023-6049-4

纳米研究(英文版)

纳米研究(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.17(4)
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