电子结构调节在Cu-Co双单原子催化剂中,用于增强COOH*溢出和电催化CO2减少活动2
Yang Yang1, Wenjun Zhang1, Guangchen Wu1
1State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China.
一种新的铜-双单原子催化剂 (CuCo-DSAC) 有效地将二氧化碳 (CO2) 转化为一氧化碳 (CO). 这种先进的电催化剂克服了减少二氧化碳的局限性,显示出卓越的性能和稳定性.
科学领域:
- 电触媒溶解是一种电触媒.
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 为了将二氧化碳 (CO2) 减少为一氧化碳 (CO),高效的电催化剂至关重要,但面临着竞争进化和中间稳定等挑战.
- 开发具有高选择性和稳定性用于二氧化碳电还原的催化剂仍然是可持续化学的重大障碍.
研究的目的:
- 合成和描述一种新的铜-双单原子催化剂 (CuCo-DSAC),用于增强二氧化碳电还原到二氧化碳.
- 阐明CuCo-DSAC中Cu和Co活性位点之间的协同机制,以提高催化性能和稳定性.
主要方法:
- 在碳黑上固的CuCo-DSAC可扩展的热解合成.
- 电化学评估包括法拉第效率,选择性和长期稳定性测试.
- 在现场光谱和密度功能理论 (DFT) 计算来研究反应机制.
主要成果:
- CuCo-DSAC在500 mA cm-2下实现了98.5%的CO法拉代效率,在400 mV范围内具有>95%的选择性.
- 催化剂表现出极好的稳定性,在48小时内衰变<6%,超过单原子控制.
- 确定了Cu和Co位点之间的协同效应,促进CO2激活,稳定中间体,促进CO吸附,同时抑制的演化.
结论:
- 定制的双站点架构,如CuCo-DSAC,提供了一个有希望的策略,以克服二氧化碳电减的局限性.
- Cu和Co位点之间的电子相互作用优化了中间能量,从而达到工业级的电催化性能.
- 这项工作为设计用于复杂化学转换的先进电催化剂提供了新的途径.
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