接口电子相互作用促进了酸盐电还原到氨的激活,而酸盐电还原为氨,而酸盐是经过Ag修饰的Co3O4
Zhenhai Fan1, Chunmei Cao1, Xingchuan Yang1
1School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China.
Angewandte Chemie (International ed. in English)
|August 6, 2024
概括
这项研究开发了一种高效的银改性氧化物 (Ag-Co3O4) 电极,用于电催化降解酸盐到氨. 电极表现出色的性能,并揭示了增强催化剂能力的界面电子相互作用.
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:
- 电催化酸盐降解为氨 (NRA) 是一种关键的可持续氨合成途径.
- 接口电子相互作用 (IEI) 对催化剂性能至关重要,但在NRA中未得到充分研究.
- 在中性介质中为NRA开发高效的催化剂至关重要.
研究的目的:
- 调查IEI对电催化NRA的影响.
- 为NRA开发一个高效的Ag-modified Co3O4电极.
- 为了阐明协同的催化机制.
主要方法:
- 用Ag修饰的Co3O4电极 (Ag1.5Co/CC) 的合成.
- 在中性介质中进行电化学表征和性能测试.
- 进行X射线光电子光谱 (XPS) 和密度函数理论 (DFT) 计算.
主要成果:
- Ag1.5Co/CC电极实现了96.86%的酸盐转化,96.11%的氨法拉代克效率和~100%的选择性.
- Ag1.5Co/CC的内在活性是Ag纳米粒子的81倍.
- 证实了Ag和Co3O4之间的IEI,稳定了Co3O4并促进了反应物的吸附.
结论:
- 通过优化吸附和反应途径,IEI显著提高了电催化NRA性能.
- 协同催化发生在Ag位降解酸盐到酸盐和Co位化酸盐到氨的过程中.
- 这项工作为设计先进的NRA电催化剂提供了见解.
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