基于中介吸附平衡的金属间化合物的选,用于电催化酸盐降解为氨
Chaoqun Ma1,2, Huaifang Zhang1,2, Jing Xia3
1School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Journal of the American Chemical Society
|July 10, 2024
概括
六角Cosb金属间化合物在电催化缩方面表现出色,可将污染物转化为具有高选择性和稳定性的氨. 这一突破推动了可持续的化学合成和储能应用.
科学领域:
- 材料科学
- 电化学
- 环境化学
背景情况:
- 电催化降解 (NO3RR) 是将酸盐污染物转化为有价值的氨 (NH3) 的可持续途径.
- 主要挑战包括中间体的非平衡吸附和缓慢的多电子转移,阻碍NO3RR效率.
研究的目的:
- 选基于过渡金属的金属间化合物 (IMC) 以获得最佳的电催化酸盐降解.
- 确定具有改善中间吸附和增强NO3RR性能的催化剂.
主要方法:
- 基于Sb/Bi的21种过渡金属 (IIIV和IB) 的计算选.
- 对关键中间体 (*NO3, *NO, *H2O) 和d波段中心的吸附能量的分析.
- 对有前途的候选人的电催化测试.
主要成果:
- 六角COSb IMC显示了关键中间体的最佳吸附平衡.
- 对于NO3RR,CoSb IMC实现了高法拉第效率 (96.3%) 和NH3选择性 (89.1%).
- CoSb IMC 具有很好的稳定性,并集成到具有高功率密度 (11.88 mW cm-2) 的 Zn-NO3 电池中.
结论:
- 六角 CoSb IMC 是高效的酸盐降解电催化剂.
- 开发的催化剂系统对可持续的氨合成和储能应用都有希望.
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