在Bi催化剂中激活惰性非缺陷部位,使用拉伸应变工程来实现高活性CO2电还原
Xingbao Chen1,2, Ruihu Lu2, Chengbo Li3
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, PR China.
Nature communications
|February 24, 2025
概括
在 (Bi) 位点引入拉力应变会增加二氧化碳减少到酸. 这种新的方法创造了空缺,降低了反应障碍,实现了可持续催化剂的高效率和电流密度.
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:
- 双缺陷部位对二氧化碳降解为酸是有效的,但大多数表面都有惰性Bi部位.
- 克服这一局限性需要策略来激活非缺陷的Bi位点以加强催化.
研究的目的:
- 在非缺陷的Bi站点引入拉伸应变,以改善二氧化碳减排 (CO2RR).
- 为了研究CO2RR中应力Bi位点的催化性能,以酸.
主要方法:
- 对基于Bi的金属有机框架 (Bi-MOF-TS) 施加快速热冲击,以诱导拉伸应变.
- 在应力Bi-MOF-TS催化剂上电化学减少CO2.
- 压力催化剂的表征和反应中间体和障碍物的分析.
主要成果:
- 在Bi站点上的拉力压力削弱了Bi-O债券并创建了Bi集群,导致持续的空缺.
- 增强OHCO中间体的吸附和显著降低反应障碍因应变.
- 在800mV范围内,Bi-MOF-TS实现了>90%的法拉代效率,格式部分电流密度为-995 ± 93 mA cm-2.2.
- 高 HCOOH 法拉代效率 (96 ± 0.64%) 在酸性电解质中的400 mA cm-2和62.0%的单通碳转化效率 (SPCE).
- 一个带有Bi-MOF-TS阴极的Zn-CO2电池显示了21.4mW cm-2的峰值功率密度和300个周期的稳定性.
结论:
- 拉力应变是一种可行的策略,用于激活非缺陷的Bi位点,以获得高效的CO2RR.
- 双MOF-TS在二氧化碳减少为酸和Zn-CO2电池方面表现出色.
- 这种方法为开发用于二氧化碳利用和储能的先进催化剂提供了有希望的途径.
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