在金属有机框架中调节Zn/Co双金属催化剂和氧化,以改善光电化学水氧化
Xiu-Shuang Xing1, Xuyang Zeng1,2, Zhongyuan Zhou3,4
1Henan Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, P. R. China. djm@iccas.ac.cn.
Dalton transactions (Cambridge, England : 2003)
|July 31, 2023
概括
这项研究增强了光电化学水分裂 (PEC-WS),使用用ZnCo-ZIF和ZnCoOOH双金属催化剂修饰的血光电极. 由于更好的载体转移和与血结合的能量,ZnCo-ZIF表现出卓越的性能.
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:
- 黑马 (α-Fe2O3) 是用于光电化学水分裂 (PEC-WS) 的热门光电极材料.
- 为了达到高的PEC-WS性能,需要催化剂来增强光生成载体分离.
- 将催化剂加载到血光电极上对于高效的PEC-WS至关重要.
研究的目的:
- 使用ZnCo-ZIF和ZnCoOOH双金属催化剂来修改FTO/Sn@α-Fe2O3光电极.
- 调查这些双金属催化剂对PEC-WS性能的影响.
- 了解提高PEC-WS效率背后的机制.
主要方法:
- 制造FTO/Sn@α-Fe2O3/ZnCo-ZIF和FTO/Sn@α-Fe2O3/ZnCoOOH光电极.这些光电极的制造过程包括:
- 光电化学测量以确定光电流密度.
- 机制研究包括电荷转移电阻和重组分析.
主要成果:
- 在FTO/Sn@α-Fe2O3/ZnCo-ZIF光电极实现了2.6 mA cm-2的光电密度在1.23 VRHE.
- 在1.23 VRHE时,FTO/Sn@α-Fe2O3/ZnCoOOH光电极达到2.3 mA cm-2的光电密度.
- 这两种催化剂都降低了转移电阻和电荷重组,改善了PEC-WS的性能.
结论:
- ZnCo-ZIF和ZnCoOOH有效地提高了基于血的PEC-WS性能.
- 与ZnCoOOH相比,ZnCo-ZIF表现出优越的催化活性和载体转移效率.
- 改善ZnCo-ZIF和血之间的结合能量有助于提高其性能.
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