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"双重使用"策略,用于提高BiVO₄光电解极的光电化学性能,使用功能化多氧化状态

Fan Feng¹, Dariusz Mitoraj², Ekemena Oseghe¹

¹Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, Mainz 55128, Germany.

ACS applied materials & interfaces

|January 16, 2025

概括

一种新的"双重使用"策略增强了用于太阳能水分的木瓦纳酸盐光电极. 作为酸和共催化剂,酸 (CoPOM) 显著提高了光电化学设备的效率和稳定性.

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:

岩瓦纳酸盐 (BiVO4) 是光电化学 (PEC) 水分解的一个有前途的材料.
提高BiVO4性能通常涉及兴奋剂和表面修饰.
开发高效和稳定的光电极极对于太阳能水分技术至关重要.

研究的目的:

引入一种"双重使用"策略,使用单个-化物 (CoPOM) 分子,用于BiVO4光电极的散装化和表面化.
调查CoPOM兴奋剂对BiVO4.4电导率和电荷分离效率的影响.
评估批量兴奋剂和表面CoPOM修改对太阳能水分裂中的BiVO4光电极的整体性能和稳定性的综合影响.

主要方法:

用CoPOM (Na10[Co4(H2O) 2 ((PW9O34) 2)) 合的BiVO4光电极的合成.
CoPOM 表面沉积在被化 BiVO4 光电极上.
使用应用偏差光转换效率 (ABPE) 测量等技术对材料性能和电化学性能进行表征.
分析表面W/Co比率,活性和稳定性之间的关系.

主要成果:

随着BiVO4与CoPOM的大量注,提高了电导率和电荷分离,使ABPE增加到0.54% (在0.87V与RHE之间),比原始BiVO4 (在1.04V与RHE之间0.03%),提高了18倍.
使用CoPOM作为共催化剂进行表面修改,进一步改善了孔提取和水氧化动力学.
结合的"双重使用"策略导致ABPE总体显著提升至0.79% (在0.82V与RHE之间),与原始BiVO4.4相比增加了26倍.

结论:

采用CoPOM的"双重使用"策略是一种高效,可扩展的方法,用于开发用于太阳能水分裂的高性能BiVO4光电极.
CoPOMs 作为合成先进能源材料的多功能前体.
这种方法为推进太阳能燃料发电技术提供了一个有希望的途径.

关键词:

在BiVO4中使用BiVO4.氧气的进化氧气的进化光电催化作用的光电催化光电极的光电极是光电极.聚氧甲酸盐是一种多氧甲酸盐.

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