Preparation of three-dimensional Ag electrode by oxidation-reduction cycle method in sodium phosphate aqueous solution for reduction CO<sub>2</sub> to CO

HE Zhiqiao; WEI Rongfei; YAN Tingting; XU Xuyang; CHEN Jianmeng; SONG Shuang

doi:10.11949/j.issn.0438-1157.20170797

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Preparation of three-dimensional Ag electrode by oxidation-reduction cycle method in sodium phosphate aqueous solution for reduction CO₂ to CO

更新时间：2025-12-10

- Preparation of three-dimensional Ag electrode by oxidation-reduction cycle method in sodium phosphate aqueous solution for reduction CO₂ to CO
- CIESC Journal Issue 12, Pages: 4809-4815(2017)
- 作者机构：
  
  浙江工业大学环境学院,浙江,杭州,310032
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170797
  CLC： 643
- Online First：05 December 2017，
  
  Published：05 December 2017
- 稿件说明：
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HE Zhiqiao, WEI Rongfei, YAN Tingting, et al. Preparation of three-dimensional Ag electrode by oxidation-reduction cycle method in sodium phosphate aqueous solution for reduction CO₂ to CO[J]. CIESC Journal, 2017, (12): 4809-4815. DOI: 10.11949/j.issn.0438-1157.20170797.
DOI：

HE Zhiqiao, WEI Rongfei, YAN Tingting, et al. Preparation of three-dimensional Ag electrode by oxidation-reduction cycle method in sodium phosphate aqueous solution for reduction CO₂ to CO[J]. CIESC Journal, 2017, (12): 4809-4815. DOI: 10.11949/j.issn.0438-1157.20170797. DOI：

摘要

通过氧化还原循环制备了具有三维表面的纳米银电极（3D-Ag）。采用X射线衍射（XRD），场发射扫描电子显微镜（FE-SEM），高分辨透射电子显微镜（HRTEM）和双电位阶跃等方法研究了电极的结构和性能。制备的3D-Ag电极表面均匀分布了（100）和（111）晶面暴露的纳米Ag颗粒，颗粒直径为30～150 nm。通过CO2的电催化还原实验考察了电极的催化活性和寿命，结果显示，相比未改性Ag片，改性3D-Ag电极具有更高的活性、选择性和稳定性。此外，3D-Ag电极在3组连续的2 h电还原CO2实验中能保持较高活性，而未改性Ag电极随时间逐渐失去活性。3D-Ag电极表现出的高活性可归因于Ag纳米颗粒有利于*COOH的稳定化和吸附态还原中间体*CO的脱附。

Abstract

Silver electrode with a three-dimensional surface (3D-Ag) was synthesized by a facile oxidation-reduction cycle method. The structure and properties of the electrode were characterized by X-ray diffraction (XRD)

field-emission scanning electron microscopy (FE-SEM)

high-resolution transmission electron microscopy (HRTEM) and potential steps. The results showed that Ag nanoparticles with {100} and {111} facets exposed and a diameter of 30-150 nm dispersed uniformly on the as-prepared 3D-Ag. In comparison to untreated Ag plate

the synthesized 3D-Ag electrode exhibits superior activity

selectivity and stability toward electrocatalytic reduction of CO2 to CO. Moreover

the 3D-Ag electrode could maintain its high activity during three successive periods of two hours

while the bulk silver electrode gradually lost its activity. The high performance of 3D-Ag electrode could be ascribed to that the Ag nanoparticles are beneficial to the stabilization of the surface adsorbed COOH species

and to the desorption of the reduction intermediates of adsorbed CO species during the reduction of CO2.

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Preparation of three-dimensional Ag electrode by oxidation-reduction cycle method in sodium phosphate aqueous solution for reduction CO2 to CO

DOI：10.11949/j.issn.0438-1157.20170797

摘要

Abstract

关键词

Keywords

references

Preparation of three-dimensional Ag electrode by oxidation-reduction cycle method in sodium phosphate aqueous solution for reduction CO₂ to CO