Cu-clusters nodes of 2D metal-organic frameworks as a cost-effective noble-metal-free cocatalyst with high atom-utilization efficiency for efficient photocatalytic hydrogen evolution

光催化 材料科学 Atom(片上系统) 贵金属 金属有机骨架 氢原子 催化作用 金属 纳米技术 光化学 化学 物理化学 计算机科学 有机化学 冶金 吸附 嵌入式系统 烷基
作者
Guangmei Jiang,Xingyan Liu,Huilong Jian,Peng Lu,Jinwu Bai,Guizhi Zhang,Yun Wen,Siqi Li,Youzhou He
出处
期刊:Chinese Chemical Letters [Elsevier]
卷期号:33 (6): 3049-3052 被引量:22
标识
DOI:10.1016/j.cclet.2021.09.047
摘要

Several 2D nanosheets of porphyrin MOFs with various transition-metal clusters as metal nodes were prepared via a simple solvothermal method to apply in the photocatalytic hydrogen evolution, in which the hydrogen production rate of the optimal NS-Cu was as high as 15.39 mmol g−1 h−1. A series of experimental technologies especially cyclic voltammetry (CV) and Mott-Schottky (M-S) had been adopted to investigate the charge-transfer property of photo-generated electron-hole pairs, it was found that the uniformly dispersed Cu-clusters nodes in the original 2D MOFs played a key role in the electron transfer process, that was, the photo-generated electron transferred from excited state eosin-Y to the Cu-clusters nodes for the efficient hydrogen evolution. The excellent photocatalytic performance could be attributed to the reversible oxidation-–reduction process of CuII/CuI, which had excellent electron-receiving and electron-outputting capabilities. Our results provided a novel avenue to adapt the uniformly dispersed metal nodes in the original MOFs as cost-effective noble-metal-free cocatalysts with very high atom-utilization efficiency to improve the photocatalytic hydrogen evolution performance in dye-sensitized system.
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