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在类似雪花的铜硫化物接口上的协奏效应,用于通过电化学还原方法高选择性地将二氧化碳转化为成型

Hengcong Tao¹, Tianbo Jia², Lina Zhang³

¹College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, PR China; School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316022, PR China.

Journal of colloid and interface science

|November 18, 2023

概括

一种新的电催化剂,SnO2@C on Cu2S,通过电化学二氧化碳减排 (ECR) 显著提高了酸盐的产量. 这种新材料实现了HCOOH的88%法拉第效率,推进了碳回收和能源解决方案.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
催化剂是一种催化剂.

背景情况:

电化学二氧化碳减排 (ECR) 对于应对能源挑战和实现碳回收至关重要.
开发高效的电催化剂是提高ECR过程中选择性和性能的关键.

研究的目的:

在ECR过程中设计和研究一种用于高选择性格式 (HCOOH) 生产的新型电催化剂.
通过利用SnO2@C和Cu2S之间的协同效应来提高CO2转换效率和选择性.

主要方法:

通过将SnO2@C加载到类似雪花的Cu2S上,合成一种新的电催化剂.
电化学表征包括循环电压测量和时电压测量来评估HCOOH法拉第效率和电流密度.
现场FT-IR和拉曼光谱法用于识别活性物种和反应中间体.
密度函数理论 (DFT) 计算以阐明催化机制和中间稳定.

主要成果:

Cu2S/1%SnO2@C电催化剂在 -1.0 V (与RHE相比) 达到88%的高HCOOH法拉第效率.
优化的催化剂表现出显著增强的CO2减排电流密度15.6mA cm-2,而纯Cu2S的3.9mA cm-2.
现场光谱学确定Cu+为活性物种,促进碳酸盐吸附/激活并抑制CO中间体.
DFT计算证实了HCOO*中间体在Cu2S/1%SnO2@C表面的稳定.

结论:

Cu2S和SnO2@C之间的协同作用有效地增强了电子转移和CO2-HCOOH转化.
开发的电催化剂提供了一种简单而有效的方法来提高ECR中的HCOOH选择性.
这项工作为碳回收和可持续能源的实际应用提供了有希望的途径.

关键词:

电化学电化学电化学电子运输是一种电子运输.格式格式格式雪花雪花是什么意思这是一个协同效应的效应.

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