具有梯度氧空隙分布的FeOOH催化剂,可实现高效和稳定的BiVO4光电极
Shiyuan Wang1, Mengjia Jiao1, Qian Ye1
1State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Shaanxi Laboratory for Advanced Materials, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China.
一种新的光蚀刻方法在氧化氧化铁 (FeOOH) 催化剂中产生渐变氧空缺. 这增强了孔运输,并提高了用于水分裂的木瓦纳酸盐 (BiVO4) 光电极的性能.
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
- 光催化作用的光催化
背景情况:
- 高活性和稳定的可催化剂对于高效的木瓦纳酸盐 (BiVO4) 光电极至关重要.
- 厚铁氧化水氧化物 (FeOOH) 催化剂虽然稳定,但呈现出较差的孔运输,限制了光电极的性能.
研究的目的:
- 通过改善FeOOH催化剂的孔运输来提高BiVO4光电极的性能.
- 在FeOOH层中引入梯度氧空缺 (GOv),使用简单的光蚀刻策略.
主要方法:
- 使用厚厚的FeOOH催化剂制造BiVO4光电极.
- 应用光蚀刻策略,将梯度氧空缺 (GOv) 引入FeOOH层.
- 修改后的FeOOH层和光电极的结构和电子特性.
主要成果:
- 采用光策略,成功地在FeOOH层中引入了梯度氧空缺 (GOv).
- 印度政府为光生成孔的"中继运输"提供了便利,并提供了丰富的氧化活性点.
- 经过修改的BiVO4/FeOOH-GOv光电极实现了5.37 mA cm-2的光电流密度和160小时的稳定性在1.23 VRHE.
结论:
- 开发的光策略有效地优化了FeOOH催化剂,用于增强光电化学水分解.
- 梯度氧空位显著提高了孔运输动态和氧演化反应 (OER) 活动.
- 这种方法为建造高效和稳定的光电化学设备提供了一个有希望的途径.
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