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从普鲁士蓝模拟预催化剂获取压力工程V-Fe ((O) OH,以实现高效的阳极氧化反应
Baghendra Singh1, Shalini Verma1, Pandian Mannu2
1Southern Laboratories-208A, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208016, India.
Angewandte Chemie (International ed. in English)
|August 22, 2025
概括
一个新的d-d电子补充策略增强了普鲁士蓝色模拟 (PBA) 预催化剂. 由此产生的V-Fe(O) OH催化剂在氧化演变和氧化反应中表现出优异的性能.
科学领域:
- 材料科学
- 电化学
- 催化剂
背景情况:
- 普鲁士蓝类似物 (PBA) 是阳极氧化反应 (AOR) 的有效预催化剂.
- 活性金属氧化[M(O) OH]相对于AORs至关重要.
- 调整PBA的电子特征可以增强催化活性.
研究的目的:
- 为微调 VOFe-PBA 前催化剂引入 d-d 电子补充策略.
- 研究VOFe-PBA的电子和结构变化.
- 评估衍生V-Fe(O) OH活性催化剂的催化性能.
主要方法:
- 合成和VOFe-PBA前催化剂的表征.
- 分析电子结构的光谱研究 (例如XPS,XAS).
- 氧化演化反应 (OER) 和氧化反应 (IOR) 的电化学激活和性能测试.
- 在现场进行拉曼光谱和机械研究.
主要成果:
- 与FeFe-PBA相比,光谱研究证实VOFe-PBA的协调和电子特征发生了变化.
- 电化学激活产生了压力V-Fe(O) OH活性催化剂.
- 在100 mA cm-2下,V-Fe(O) OH表现出异常的OER (1.56 V与RHE相比) 和IOR (1.42 V与RHE相比).
- 在IOR辅助的水分解过程中,V-Fe(O) OH实现了60%的能量效率.
结论:
- 该d-d电子补充策略有效地增强了PBA预催化剂.
- 压力V-Fe(O) OH活性催化剂对AORs具有优越的电催化活性.
- 该机制涉及晶格氧机制 (LOM) 和质子脱电子转移 (PDET).
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