纳米晶枝CuAu 合金催化剂对二氧化碳电催化还原性能的研究

doi:10.13208/j.electrochem.201253

摘要/Abstract

摘要：

利用可再生清洁能源将CO₂转化为CO和其他小分子是合成含碳燃料的可观方法之一。间歇性可再生能源存储的重要策略之一是将二氧化碳进行电化学还原。选择具有高活性和稳定性的电催化剂对于电化学还原CO₂至关重要。在这项研究中,我们使用简单的电沉积方法合成了具有纳米晶枝状结构的CuAu合金电极。各项表征显示原子比约为1:1的CuAu纳米枝晶对CO₂的电化学还原具有出色的催化活性。合成的主要产物是H₂和CO,这是合成气体是合成天然气,氨和甲醇合成的中间体。电化学阻抗谱（EIS）测量表明,相对于Cu和Au电沉积催化剂,CuAu纳米晶枝状催化剂具有相对低的电荷转移阻力。CuAu纳米枝晶催化剂是一种具有潜在的转化CO₂为合成气体的高活性电催化剂。

关键词: 电催化, 电沉积, 二氧化碳还原, 铜金, 纳米晶枝

Abstract:

The conversion of carbon dioxide (CO₂) to carbon monoxide (CO) and other value-added products is an interesting approach for carbon-containing fuel synthesis using renewable and clean energy. The electrochemical reduction of CO₂ is one of the promising strategies for the storage of intermittent renewable energy resources. The development of electrocatalysts with high activity and stability is vital in the electrochemical CO₂ reduction process. In this study, copper and gold alloyed (CuAu) electrodes with nanodendritic structures were synthesized using a facile electrodeposition method. The CuAu nanodendrites with the atomic ratio of Cu to Au being approximately 1:1 demonstrated excellent catalytic activity for the electrochemical reduction of CO₂. Syngas, which is utilized as an intermediate in the production of synthetic natural gas, ammonia, and methanol, was the major product obtained under various applied potentials. Electrochemical impedance spectroscopic (EIS) measurements revealed that the CuAu nanodendrtic catalyst had a much lower charge transfer resistance than Cu and Au electrodeposited catalysts. The CuAu nanodendrite catalyst is an intriguing material with potential applications for syngas production from CO₂.

Key words: electrocatalysis, electrodeposition, CO₂ reduction reaction, CuAu nanocomposite, nanodendrites

Dylan Siltamaki, 陈帅, Farnood Pakravan, Jacek Lipkowski, 陈爱成. 纳米晶枝CuAu 合金催化剂对二氧化碳电催化还原性能的研究[J]. 电化学（中英文）, 2021, 27(3): 278-290.

Dylan Siltamaki, Shuai Chen, Farnood Rahmati, Jacek Lipkowski, Ai-Cheng Chen. Synthesis and Electrochemical Study of CuAu Nanodendrites for CO₂ Reduction[J]. Journal of Electrochemistry, 2021, 27(3): 278-290.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.201253

https://electrochem.xmu.edu.cn/CN/Y2021/V27/I3/278

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