Ionic Liquid-Regulated Electrodeposition of Silver for Crystal Plane Engineering to Enhance Electroreduction of CO<sub>2</sub> to CO

Xue Qi’zhou; Zhang Zeng’hui; Cheng Ao’fei; Wang Yan’lin; Feng Jia’qi; Zhang Xiang

doi:10.11949/0438-1157.20260568

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Ionic Liquid-Regulated Electrodeposition of Silver for Crystal Plane Engineering to Enhance Electroreduction of CO₂ to CO

更新时间：2026-06-12

- Ionic Liquid-Regulated Electrodeposition of Silver for Crystal Plane Engineering to Enhance Electroreduction of CO₂ to CO
- CIESC Journal (2026)
- 作者机构：
  
  1.中国石油大学（北京）化学工程与环境学院，重质油全国重点实验室，碳捕集与转化利用北京市重点实验室，北京102249
  2.中国科学院过程工程研究所，离子液体清洁过程北京市重点实验室，北京100190
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260568
  CLC： TQ 151.1
- Received：20 April 2026，
  
  Revised：2026-06-11，
  
  Accepted：12 June 2026，
- 稿件说明：
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Xue Qi’zhou, Zhang Zeng’hui, Cheng Ao’fei, et al. Ionic Liquid-Regulated Electrodeposition of Silver for Crystal Plane Engineering to Enhance Electroreduction of CO₂ to CO[J/OL]. CIESC Journal, 2026. DOI: 10.11949/0438-1157.20260568.
DOI：

Xue Qi’zhou, Zhang Zeng’hui, Cheng Ao’fei, et al. Ionic Liquid-Regulated Electrodeposition of Silver for Crystal Plane Engineering to Enhance Electroreduction of CO₂ to CO[J/OL]. CIESC Journal, 2026. DOI: 10.11949/0438-1157.20260568. DOI：

摘要

银（Ag）基催化剂因其在电催化还原二氧化碳（CO

RR）制备一氧化碳（CO）过程中表现出较高催化活性，受到广泛关注，但其不同晶面组成会对催化活性产生显著影响，如何制备高活性晶面组成Ag基催化剂仍存在挑战。本文在电沉积液中加入离子液体，成功制备出以高活性Ag（111）晶面为主导的银基催化剂。该催化剂在CO

RR制CO反应中表现出优异

的催化性能，0.1 A cm

-2

电流密度下CO法拉第效率（FE

）可达92.3%，是非Ag（111）晶面主导型催化剂的2.42倍，且在0.1~0.3 A cm

-2

电流密度范围内，FE

均保持在80%以上。原位红外实验结果证实Ag（111）晶面与关键中间体*COOH的结合能力更强，增加了其在催化剂表面的覆盖度，从而提升催化剂活性。本研究为通过调控晶面组成开发高效、稳定的CO

RR制CO催化剂提供了新的思路。

Abstract

Silver （Ag）-based catalysts have attracted extensive attention owing to their high catalytic activity in the electrocatalytic reduction of carbon dioxide （CO

RR） to carbon monoxide （CO）. However

the crystal plane composition of Ag exhibits a remarkable influence on its catalytic activity

and the rational preparation of Ag-based catalysts with dominant high-activity crystal planes remains a formidable challenge. In this work

ionic liquid was introduced into the electrodeposition electrolyte

enabling the successful fabrication of Ag-based catalysts dominated by the highly active Ag（111） crystal plane. The as-prepared catalyst delivered outstanding catalytic performance toward CO

to CO: the Faradaic efficiency of CO （FE

） reached 92.3% at a current density of 0.1 A cm

-2

which was 2.42 times higher than that of the non-Ag（111）-oriented catalyst. Moreover

remained above 80% over the current density range of 0.1-0.3 A cm

-2

. In situ infrared spectroscopy results verified that the Ag（111） plane possesses stronger adsorption affinity toward the key intermediate *COOH

thereby increasing its surface coverage and boosting catalytic activity. This study provides a novel strategy for developing efficient and stable CO

RR catalysts toward CO production via crystal plane composition modulation.

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⁰

Ionic Liquid-Regulated Electrodeposition of Silver for Crystal Plane Engineering to Enhance Electroreduction of CO2 to CO

DOI：10.11949/0438-1157.20260568

摘要

Abstract

关键词

Keywords

references

Ionic Liquid-Regulated Electrodeposition of Silver for Crystal Plane Engineering to Enhance Electroreduction of CO₂ to CO