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电解质辅助结构重建Sn-Zn混合氧化物的优化提高了电化学CO2到HCOO的转化

Jinxian Feng¹, Chunfa Liu¹, Lulu Qiao¹

¹Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR, 999078, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|August 19, 2024

概括

电解质显著影响电化学二氧化碳的减少. KHCO3 电解质与 Sn-Zn 混合氧化物显示出优异的 CO2 形成转化,由于优化表面重建,优于其他电解质.

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:

电解质对于电化学二氧化碳还原反应 (e-CO2RR) 的性能至关重要.
电解质对e-CO2RR机制和催化剂行为的特定影响尚不清楚.
开发高效的电催化剂用于二氧化碳转化对于碳中和至关重要.

研究的目的:

调查不同电解质对Sn-Zn混合氧化电催化剂减少CO2的性能的影响.
阐明电解质诱导的表面重建和e-CO2RR中的催化活性之间的关系.
确定最佳的电解质条件,以提高二氧化碳的形式转化.

主要方法:

使用Sn-Zn混合氧化物的电化学CO2降解反应 (e-CO2RR) 实验.
在各种电解质中的性能评估:KHCO3,NaHCO3,K2SO4.
系统性表征 (例如,表面分析) 来研究电解质依赖的表面重建.

主要成果:

在KHCO3中,Sn-Zn混合氧化物在0.93V时实现了高的HCOO-法拉第效率 (~89%) 和产率 (~0.58 mmol cm-2 h-1).
观察到电解质依赖的表面重建:KHCO3中的Sn-SnO2/ZnO,NaHCO3中的ZnO封装的Sn-SnO2/ZnO,K2SO4.4中的Sn-SnO2/Zn-ZnO.
经KHCO3重建的Sn-SnO2/ZnO催化剂证明了增强的电荷传输,二氧化碳吸附,质子积累,并抑制了进化.

结论:

电解质成分极大地影响了Sn-Zn混合氧化物电催化剂的表面重建.
电解液KHCO3促进了表面重建,从而产生更高的CO2,以形成转换效率和稳定性.
这项研究为设计用于减少二氧化碳的先进电催化剂提供了对电解质表面相互作用的见解.

关键词:

减少二氧化碳的减少氧化 - 氧化的氧化物电解质的电解质是一种电解质.格式格式格式表面的重建表面的重建

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