首页|Exploring the impact of Nafion modifier on electrocatalytic CO2 reduction over Cu catalyst

Exploring the impact of Nafion modifier on electrocatalytic CO2 reduction over Cu catalyst

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Nafion as a universal polymer ionomer was widely applied for nanocatalysts electrode preparation.However,the effect of Nafion on electrocatalytic performance was often overlooked,especially for CO2 electrolysis.Herein,the key roles of Nafion for CO2RR were systematically studied on Cu nanoparticles(NPs)electrocatalyst.We found that Nafion modifier not only inhibit hydrogen evolution reaction(HER)by decreasing the accessibility of H2O from electrolyte to Cu NPs,and increase the CO2 concentra-tion at electrocatalyst interface for enhancing the CO2 mass transfer process,but also activate CO2 mole-cule by Lewis acid-base interaction between Nafion and CO2 to accelerate the formation of*CO,which favor of C-C coupling for boosting C2 product generation.Owing to these features,the HER selectivity was suppressed from 40.6％to 16.8％on optimal Cu@Nafion electrode at-1.2 V versus reversible hydro-gen electrode(RHE),and as high as 73.5％faradaic efficiencies(FEs)of C2 products were achieved at the same applied potential,which was 2.6 times higher than that on bare Cu electrode(～28.3％).In addition,Nafion also contributed to the long-term stability by hinder Cu NPs morphology reconstruction.Thus,this work provides insights into the impact of Nafion on electrocatalytic CO2RR performance.

Nafion modifierCO2 reductionCu nanoparticlesIn situ ATR-SEIRASC2 product

Yingshi Su、Yonghui Cheng、Zhen Li、Yanjia Cui、Caili Yang、Ziyi Zhong、Yibing Song、Gongwei Wang、Lin Zhuang

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College of Chemistry & Chemical Engineering and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province,Shantou University,Shantou 515063,Guangdong,China

Department of Chemistry Engineering,Guangdong Technion-Israel Institute of Technology(GTIIT),Shantou 515063,Guangdong,China

Technion-Israel Institute of Technology(IIT),Haifa 32000,Israel

College of Chemistry and Molecular Sciences,Hubei Key Lab of Electrochemical Power Sources,Wuhan University,Wuhan 430072,Hubei,China

The Institute for Advanced Studies,Wuhan University,Wuhan 430072,Hubei,China

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Natural Science Foundation of Guangdong ProvinceNational Natural Science Foundation of ChinaSTU Scientific Research Foundation for Talents2020 Li Ka Shing Foundation Cross-Disciplinary Research Grant

2022A151501235921902121NTF210202020LKSFG09A

2024

10.1016/j.jechem.2023.10.010

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)：2024.88(1)
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