在电化学二氧化碳还原反应过程中,具有高效的电催化形式生成的硫添加铜催化剂
Yinuo Wang1,2, Hongming Xu2,3, Yushen Liu2
1Advanced Materials Thrust, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou, 511400, Guangdong, China.
Angewandte Chemie (International ed. in English)
|January 7, 2024
概括
一种新的硫合铜催化剂显著提高了电化学二氧化碳减排中的酸盐生产,实现了高效率. 这种低成本的催化剂与工业应用的昂贵替代品相竞争.
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:
- 过渡后金属催化剂在电化学二氧化碳减排方面表现出色.
- 没有过渡后金属的铜 (Cu) 催化剂对这种反应的活性有限.
研究的目的:
- 通过电化学二氧化碳减排开发一种高性能,低成本的催化剂,用于通过电化学二氧化碳减排生成形式.
- 调查硫注射在增强铜催化剂活性中的作用.
主要方法:
- 一种硫 (S) 添加剂的铜 (Cu) 基催化剂的合成.
- 电化学二氧化碳减排反应 (CO2 RR) 的性能评估.
- 现场结构特征和热力学计算.
主要成果:
- 用S-doped Cu催化剂实现了最大的法拉代效率92%和部分电流密度为321 mA cm-2的形式生成.
- 结构分析揭示了丰富的谷物边界,并保留了来自岩阶段的S-S债券.
- 热力学计算表明,S-S债券适度的中间约束能,增强格式通路活动.
结论:
- 硫剂有效地提高了铜催化剂的性能,用于电化学二氧化碳的减少以形成.
- S-doped Cu催化剂表现出与主流催化剂相当的性能,提供了一个具有成本效益的解决方案.
- 这项工作突出了改造低成本金属与非金属元素的潜力,以实现先进的催化.
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