材料科学
光电流
光电阴极
分解水
纳米晶
纳米结构
水溶液
钙钛矿(结构)
能量转换效率
光催化
化学稳定性
化学工程
催化作用
纳米技术
光电子学
物理化学
化学
生物化学
物理
量子力学
工程类
电子
作者
Linjuan Li,Li‐Yong Gan,Zhonghai Zhang
标识
DOI:10.1002/admi.202100202
摘要
Abstract All inorganic perovskite CsPbBr 3 nanocrystals are a promising candidate as photocathode for efficient photoelectrocatalytic (PEC) water splitting. However, the poor chemical stability severely limits its practical applications. The exploration of perovskite‐based ideal photocathode materials with efficient and highly stable PEC performance is still an ambitious and meaningful challenge. Herein, under guidance of theoretical calculations, an encapsulation strategy is proposed to prepare the CsPbBr 3 /Ni 2 P core/shell nanostructures. Compared with the pristine CsPbBr 3 nanocrystals, the CsPbBr 3 /Ni 2 P nanostructures show a significant improvement of photocurrent density up to 10 000 folds with long‐term stability in aqueous solution, and present superior PEC activity for hydrogen generation with nearly 100% faradic efficiency. The encapsulation strategy opens up an avenue for rational design of perovskite‐based photocathodes for efficient and stable PEC water reduction.
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