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基于BiVO₄的异质连接光阴极用于高性能光电化学过氧化生产

Shaobo Shi¹, Yurou Song¹, Yuye Jiao¹

¹State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China.

|April 29, 2024

概括

这项研究开发了一种新型的光电化学 (PEC) 细胞,使用 bismuth vanadate (BiVO4) 进行高效的过氧化 (H2O2) 生产. 综合系统实现了高产量,为人工光合作用和太阳能燃料发电铺平了道路.

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) 细胞为过氧化 (H2O2) 合成提供了一个可持续的途径.
高效的H2O2生产对于各种化学过程以及作为潜在的液态太阳能燃料至关重要.

研究的目的:

设计和合成用于PEC H2O2生产的集成光阴极.
通过异构结构和催化剂增强H2O2生成.
为高效的太阳能燃料生产构建一个无偏见的PEC并联电池.

主要方法:

制造p型BiVO4 (p-BVO) 阵列,具有金属氧化物 (MO) 异构和NiNC催化剂.
合成n型化BiVO4 (n-Mo:BVO) 光电极.
使用已制造的光阴极和光阳极组装一个无偏的PEC联电池.
评估H2O2生产速度和法拉第效率 (FE).

主要成果:

该p-BVO/SnO2/NiNC光阴极实现了65.46μmol L-1 h-1的H2O2生产率,其FE值为76.12%.
没有偏见的PEC联单元显示,H2O2生成的FE总值为97.67%.
一个面积大 (3 × 3 厘米) 的基于BiVO4的合细胞达到总H2O2产量为338.84 μmol L-1.

结论:

开发的基于BiVO4的光阴极和并联细胞显示了对高效的PEC H2O2合成的重大前景.
这项工作为设计用于太阳能燃料生产的人工光合作用系统提供了基础.
综合系统突出了PEC技术在可持续化学合成方面的潜力.

关键词:

基于BiVO4的双联系统.人工光合作用细胞.摄影电极 (Photoanode) 是一个光电极.摄像电解极是光学电解极.通过光电化学方法生产H2O2.

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