期刊
ACS CATALYSIS
卷 -, 期 -, 页码 -出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.3c03933
关键词
2D/quasi-2D Ruddlesden-Popperperovskite; BA(2)MA( n-1)Pb (n) I3n+1; hydrohalic acidsplitting; photocatalysis; H-2 evolution
In recent years, two-dimensional and quasi-2D Ruddlesden-Popper perovskite materials have been developed as emerging semiconductor materials for solar cells due to their structural diversity and high power-conversion efficiency. However, their photocatalytic applications have been rarely explored. In this study, a 2D/quasi-2D RP perovskite was fabricated and used as a photocatalyst for hydrohalic acid splitting. The results showed that the stress in the perovskite significantly influenced its photoelectronic properties, and the quasi-2D perovskite with a high n value exhibited the highest photocatalytic activity, attributed to its efficient charge transport and separation capability.
In recent years, two-dimensional (2D) and quasi-2D Ruddlesden-Popper (RP) perovskite materials have been developed as emerging semiconductor materials for solar cells due to their structural diversity and high power-conversion efficiency, but there are few reports on the photocatalytic applications. Here, 2D/quasi-2D RP BA(2)MA(n-1)Pb(n)I(3n+1) perovskite was fabricated as a hydrogen evolution photocatalyst for hydrohalic acid splitting. Theoretical and experimental surveys show that the stress in BA(2)MA(n-1)Pb(n)I(3n+1) can significantly influence the photoelectronic properties. More importantly, charge carrier dynamics investigation shows that the quasi-2D perovskite with a high n value has more efficient charge transport and separation capability, obtaining the highest photocatalytic activity. When loading with Pt as the cocatalyst, 2.0 wt % Pt/BA(2)MA(3)Pb(4)I(13) exhibits a superior photocatalytic H-2 evolution activity of 394.8 mu mol h(-1) with an STH (solar-to-hydrogen efficiency) of 1.21%, better than most reported 3D perovskite photocatalysts. This work is expected to provide insights into expanding metal halide perovskite-based photocatalysts for efficient photocatalytic H-2 evolution.
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