High-Performance Electrocatalytic CO2 Reduction for CO Generation Using Hydrophobic Porous Carbon Supported Au

Yanjia Cui; Yonghui Cheng; Caili Yang; Yingshi Su; Defu Yao; Biping Liufu; Jialei Li; Yiwen Fang; Suyao Liu; Ziyi Zhong; Xiaoming Wang; Yibing Song; Zhen Li

doi:10.1021/acssuschemeng.3c02291

High-Performance Electrocatalytic CO₂ Reduction for CO Generation Using Hydrophobic Porous Carbon Supported Au

Yanjia Cui, Yonghui Cheng, Caili Yang, Yingshi Su, Defu Yao, Biping Liufu, Jialei Li, Yiwen Fang, Suyao Liu, Ziyi Zhong, Xiaoming Wang, Yibing Song, Zhen Li^*

^*Corresponding author for this work

Chemical Engineering

Research output: Contribution to journal › Article

6 Scopus citations

Abstract

Electrocatalytically reducing gaseous CO2 to high value-added chemical fuels is an ideal method to address energy and environmental issues. To achieve high Faradic efficiency (FE) of specific products with high current density for the CO2 reduction reaction (CO2RR), it is crucial to design suitable electrocatalysts to understand the relationship of structure and performance. Herein, we synthesized a hydrophobic porous carbon scaffold loaded with Au nanoparticles to explore the effect of the porous structure on CO2RR performance. As high as 92% FE of CO is achieved over the optimized 20%Au/FPC-800 electrocatalyst within the applied potential range of −0.7 to −1.1 V versus RHE, and its current density toward CO2RR is also much larger than that of other three electrocatalysts for comparison. Based on the characterization of CO2 adsorption/desorption, Tafel slope, electrochemical impedance spectroscopy (EIS), and in situ attenuated total reflection-surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) analysis, it is proposed that the hydrophobic porous structure favors CO2 storage, which can enhance the mass transfer of low-soluble CO2 molecules to the electrocatalyst interface during CO2RR. Our findings provide a strategy for achieving high FE of converting CO2 to generate a CO product with a high current density.

Original language	English
Journal	ACS Sustainable Chemistry and Engineering
DOIs	https://doi.org/10.1021/acssuschemeng.3c02291
State	Published - 20 Jul 2023

Keywords

CO2 reduction
Au
hydrophobic
porous carbon
in situ ATR-SRIRAS
CO product
electrolysis

Access to Document

10.1021/acssuschemeng.3c02291

Cite this

@article{ba959db1d841469d9135e020f404a34e,

title = "High-Performance Electrocatalytic CO2 Reduction for CO Generation Using Hydrophobic Porous Carbon Supported Au",

abstract = "Electrocatalytically reducing gaseous CO2 to high value-added chemical fuels is an ideal method to address energy and environmental issues. To achieve high Faradic efficiency (FE) of specific products with high current density for the CO2 reduction reaction (CO2RR), it is crucial to design suitable electrocatalysts to understand the relationship of structure and performance. Herein, we synthesized a hydrophobic porous carbon scaffold loaded with Au nanoparticles to explore the effect of the porous structure on CO2RR performance. As high as 92% FE of CO is achieved over the optimized 20%Au/FPC-800 electrocatalyst within the applied potential range of −0.7 to −1.1 V versus RHE, and its current density toward CO2RR is also much larger than that of other three electrocatalysts for comparison. Based on the characterization of CO2 adsorption/desorption, Tafel slope, electrochemical impedance spectroscopy (EIS), and in situ attenuated total reflection-surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) analysis, it is proposed that the hydrophobic porous structure favors CO2 storage, which can enhance the mass transfer of low-soluble CO2 molecules to the electrocatalyst interface during CO2RR. Our findings provide a strategy for achieving high FE of converting CO2 to generate a CO product with a high current density.",

keywords = "CO2 reduction, Au, hydrophobic, porous carbon, in situ ATR-SRIRAS, CO product, electrolysis",

author = "Yanjia Cui and Yonghui Cheng and Caili Yang and Yingshi Su and Defu Yao and Biping Liufu and Jialei Li and Yiwen Fang and Suyao Liu and Ziyi Zhong and Xiaoming Wang and Yibing Song and Zhen Li",

year = "2023",

month = jul,

day = "20",

doi = "10.1021/acssuschemeng.3c02291",

language = "英语",

journal = "ACS Sustainable Chemistry and Engineering",

issn = "2168-0485",

publisher = "American Chemical Society",

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TY - JOUR

T1 - High-Performance Electrocatalytic CO2 Reduction for CO Generation Using Hydrophobic Porous Carbon Supported Au

AU - Cui, Yanjia

AU - Cheng, Yonghui

AU - Yang, Caili

AU - Su, Yingshi

AU - Yao, Defu

AU - Liufu, Biping

AU - Li, Jialei

AU - Fang, Yiwen

AU - Liu, Suyao

AU - Zhong, Ziyi

AU - Wang, Xiaoming

AU - Song, Yibing

AU - Li, Zhen

PY - 2023/7/20

Y1 - 2023/7/20

N2 - Electrocatalytically reducing gaseous CO2 to high value-added chemical fuels is an ideal method to address energy and environmental issues. To achieve high Faradic efficiency (FE) of specific products with high current density for the CO2 reduction reaction (CO2RR), it is crucial to design suitable electrocatalysts to understand the relationship of structure and performance. Herein, we synthesized a hydrophobic porous carbon scaffold loaded with Au nanoparticles to explore the effect of the porous structure on CO2RR performance. As high as 92% FE of CO is achieved over the optimized 20%Au/FPC-800 electrocatalyst within the applied potential range of −0.7 to −1.1 V versus RHE, and its current density toward CO2RR is also much larger than that of other three electrocatalysts for comparison. Based on the characterization of CO2 adsorption/desorption, Tafel slope, electrochemical impedance spectroscopy (EIS), and in situ attenuated total reflection-surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) analysis, it is proposed that the hydrophobic porous structure favors CO2 storage, which can enhance the mass transfer of low-soluble CO2 molecules to the electrocatalyst interface during CO2RR. Our findings provide a strategy for achieving high FE of converting CO2 to generate a CO product with a high current density.

AB - Electrocatalytically reducing gaseous CO2 to high value-added chemical fuels is an ideal method to address energy and environmental issues. To achieve high Faradic efficiency (FE) of specific products with high current density for the CO2 reduction reaction (CO2RR), it is crucial to design suitable electrocatalysts to understand the relationship of structure and performance. Herein, we synthesized a hydrophobic porous carbon scaffold loaded with Au nanoparticles to explore the effect of the porous structure on CO2RR performance. As high as 92% FE of CO is achieved over the optimized 20%Au/FPC-800 electrocatalyst within the applied potential range of −0.7 to −1.1 V versus RHE, and its current density toward CO2RR is also much larger than that of other three electrocatalysts for comparison. Based on the characterization of CO2 adsorption/desorption, Tafel slope, electrochemical impedance spectroscopy (EIS), and in situ attenuated total reflection-surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) analysis, it is proposed that the hydrophobic porous structure favors CO2 storage, which can enhance the mass transfer of low-soluble CO2 molecules to the electrocatalyst interface during CO2RR. Our findings provide a strategy for achieving high FE of converting CO2 to generate a CO product with a high current density.

KW - CO2 reduction

KW - Au

KW - hydrophobic

KW - porous carbon

KW - in situ ATR-SRIRAS

KW - CO product

KW - electrolysis

U2 - 10.1021/acssuschemeng.3c02291

DO - 10.1021/acssuschemeng.3c02291

M3 - 文章

SN - 2168-0485

JO - ACS Sustainable Chemistry and Engineering

JF - ACS Sustainable Chemistry and Engineering

ER -