单体FAPbBr3光电极用于光电化学氧化水,具有较低的发作潜力和增强的稳定性
Hao Yang1, Yawen Liu2, Yunxuan Ding3
1Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10044, Stockholm, Sweden.
Nature communications
|September 7, 2023
概括
研究人员开发了一种新的金属化物矿光电极,用于高效的光电化学水分裂. 这种无贵金属的设备展示了太阳能到电能的高效率和稳定性,为可扩展的太阳能燃料生产铺平了道路.
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
- 可再生能源可再生能源是可再生能源.
背景情况:
- 光电化学 (PEC) 水分离对于太阳能燃料生产至关重要.
- 由于光电极的挑战,目前的PEC系统面临效率,稳定性和可扩展性的局限性.
- 金属化物矿为PEC应用提供有前途的光伏性能.
研究的目的:
- 开发一种高效,稳定和可扩展的基于金属化物矿的光电极,用于光电化学水氧化.
- 为了研究FAPbBr3矿光伏装置的性能,该光伏装置集成到单体光电极结构中.
- 探索矿光电极用于太阳能燃料发电的潜力.
主要方法:
- 一个平面的FAPbBr3矿光伏装置的制造,具有一个半孔碳孔导电层.
- 一个单体光电极的构造,其中包含FAPbBr3吸收器,碳/石墨导电保护和NiFe催化剂层.
- 性能特征包括太阳能到电效率,开放电路电压,启动潜力和应用偏差光子到电流效率 (ABPE).
- 在阳光照明下的稳定性测试与紫外线过器保护和光热效应调查.
主要成果:
- 该FAPbBr3光伏设备实现了9.2%的太阳能电力转换效率和1.4V的开放电路电压.
- 单体光电极表现出超低的启动电位 (<0V与RHE) 和8.5%的ABPE.
- 使用紫外线过器保护,实现了超过100小时的稳定运行.
- 光热检测证实,由于光热效应,矿光电极的性能得到了提高.
结论:
- 金属化物矿光电极,特别是FAPbBr3,对于高效和稳定的光电化学水氧化非常有前途.
- 开发的单体光电极设计克服了可扩展性和性能方面的关键挑战.
- 这项研究为推进基于光伏材料的光电电极用于太阳能燃料应用提供了重要的指导.
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