光催化
价(化学)
杂原子
金属有机骨架
制氢
过渡金属
光化学
可见光谱
分解水
氧化物
铂金
化学物理
材料科学
化学
化学工程
物理化学
催化作用
吸附
有机化学
光电子学
工程类
戒指(化学)
作者
Xinning Zhang,Xiaojie Ma,Yuqing Ye,Caixia Guo,Xiaojun Xu,Junwen Zhou,Bo Wang
标识
DOI:10.1016/j.cej.2022.140939
摘要
Fe-oxo cluster-based metal–organic frameworks (MOFs) offer a tunable platform for visible-light-driven catalysis, yet the unmatched energy level and the ease of charge recombination strongly hinder their application in photocatalytic H2 generation. In this work, we report an Fe(II/III) mixed-valence catalyst derived from the transition of an Fe(II)2N2O10 cluster-based MOF in water through a solvent displacement pathway. Both electronic band structure and charge transfer dynamics are effectively optimized via heteroatom coordination and valence mixing in the iron clusters. 25 times the visible-light-induced H2 yield of pristine FeMOF was obtained by Fe(II/III) MOF with platinum as cocatalyst. The Fe MOF catalyst also shows significantly superior performance in comparison with the well-known oxide catalyst α-Fe2O3 and the commonly investigated MOF catalyst NH2-UiO-66. This work provides a direction for the structural engineering of Fe-MOFs for photocatalysts.
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