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在AgCd双金属催化剂中的兴奋剂工程使高效的CO2电还原成为CO和水性Zn-CO电池

Lan Kang¹, Yonghao Zhang¹, Lihui Dong^1,2

¹Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|October 8, 2024

概括

在AgCd双金属中的兴奋剂增强了CO2吸附和激活,从而产生高效的电化学CO2降解反应 (CO2RR). 这一突破使得Zn-CO2电池具有较高的二氧化碳选择性和更好的性能.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

电化学二氧化碳还原反应 (CO2RR) 受到二氧化碳吸附/激活不良以及高中间形成能量障碍的限制.
开发高效的催化剂对于推进CO2RR技术至关重要.

研究的目的:

为增强二氧化碳电还原工程设计一种添加剂的AgCd双金属催化剂 (AgCd-B).
调查兴奋剂对催化剂性能和反应机制的影响.
探索催化剂在水性Zn-CO2电池中的应用.

主要方法:

通过还原反应合成B化AgCd双金属催化剂 (AgCd-B).
在现场实验性表征.
密度函数理论 (DFT) 的计算.
电化学性能测试 (法拉第效率,潜在窗口).
水性Zn-CO2电池的组装和测试.

主要成果:

AgCd-B催化剂显示了增强的二氧化碳吸附和激活.
乙基兴奋剂调节电子结构,减少中间结合能.
在 -0.8 V 和 RHE 时,达到 99% 的高 CO 法拉第效率 (FE_CO).
在一个广泛的潜在窗口中,FE_CO 保持在 92% 以上 (-0.6 到 -1.1 V 与 RHE 相比).
二氧化碳电池的功率密度为20.18mW cm-2和33小时的充电时间.

结论:

兴奋剂是一种有效的策略,用于改善CO2电还原的AgCd双金属催化剂.
AgCd-B催化剂为CO生产提供了高效率和选择性.
开发的催化剂对储能器件 (如Zn-CO2电池) 的实际应用非常有希望.

关键词:

在AgCd双金属中.B 兴奋剂的使用.CO 的选择性.二氧化碳的电还原 CO2 的电还原.这是Zn-CO2电池.

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