通过Vo-SnO2/TiO2复合电极将光电化学驱动的降解为氨
Junbo Ma1, Jiangjian Fu1, Lan Sun1
1State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China. sunlan@xmu.edu.cn.
Nanoscale
|February 26, 2024
概括
这项研究证明了一种用于固的新型光电化学 (PEC) 催化剂. 设计的SnO2/TiO2材料在环境条件下使用光和电能高效地将转化为氨.
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:
- (N2) 分子具有强烈的三重键,在温和条件下使固定具有挑战性.
- 光电化学 (PEC) 催化提供了一个有前途的方法,通过整合光催化和电催化来减少环境.
研究的目的:
- 开发一种高效的SnO2/TiO2光电极,用于增强降解反应 (NRR).
- 调查氧空缺 (Vo) 在提高氨合成PEC性能方面的作用.
主要方法:
- 通过热水方法在TiO2纳米基阵列上制造SnO2量子点.
- 在惰性大气下通过高温回火在SnO2中引入氧气空缺 (Vo).
- 不同质的VO-SnO2/TiO2结构及其PEC性能的表征.
主要成果:
- 这种VO-SnO2/TiO2异构结构有效地促进了光载体的分离.
- 在SnO2中的氧空缺 (Vo) 激活了N2分子并促进了氨 (NH3) 的产生.
- 在 -0.2 V偏向下实现了19.41 μg cm−2 h−1的固定产量和59.6%的法拉代效率.
结论:
- 不同质的VO-SnO2/TiO2结构,加上氧气空缺,显著增强了PEC缩.
- 在VO-SnO2/TiO2系统中,光和电之间的协同效应对于高效的氨合成至关重要.
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