Ni单原子/纳米粒子合作催化系统通过P异原子不对称协调进行有效的电催化CO2减少的调节
Haoquan Wang1, Weiqi Liu1, Shiyong Xu1
1MOE Key Laboratory of Coal Processing and Efficient Utilization, School of Chemical Engineering and Technology, China University of Mining and Technology, 1 Daxue Road, Xuzhou, Jiangsu, 221116, China.
一种具有Ni─N─P共的新型多孔碳催化剂增强了电催化二氧化碳的减少. 这种催化剂通过整合Ni纳米粒子和单个原子来提高选择性和稳定性,以实现高效的电子转移和中间合.
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:
- 单原子催化剂 (SAC) 和纳米颗粒催化剂在电催化二氧化碳减排 (eCO2RR) 方面表现有前景.
- 由于局部轨道,SACs在中间合中面临挑战,而纳米粒子则面临聚合和进化的风险.
- 现有的催化剂在eCO2RR中的效率和选择性方面扎.
研究的目的:
- 为eCO2RR开发一种新型催化剂,克服当前SAC和纳米颗粒催化剂的局限性.
- 增强电子传输和中间合,以提高二氧化碳减排性能.
- 在电催化二氧化碳还原反应中实现高选择性,电流密度和稳定性.
主要方法:
- 通过两步热解工艺制备多孔碳催化剂.
- 与尼克尔 (Ni), (N) 和 (P) 进行三级共.
- 封装Ni纳米粒子 (NP) 并将Ni单个原子 (SA) 固定在碳支上.
主要成果:
- --P辅助催化剂整合了--和-,促进了电子转移.
- 兴奋剂控制了Ni NP的大小,抑制了的进化,并形成了不对称的NiN3P─SA活性位点.
- 实现了高的CO选择性 (95%),电流密度 (227.4 mA cm-2) 和稳定性 (120 h).
结论:
- 多孔的Ni─N─P三元共化催化剂显示出对eCO2RR的卓越性能.
- Ni NPs和Ni SAs之间的协同效应,以及定制的活性位点,提高了催化效率.
- 这种催化剂为高效和选择性的电催化二氧化碳减排提供了一个有希望的策略.
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