Hybrid photoanodes based on surface-bound host-guest molecular assemblies

IF 19.1 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chem Pub Date : 2024-12-09 DOI:10.1016/j.chempr.2024.11.003

Jiaxuan Wang, Daokuan Li, Xiaona Li, Guoquan Liu, Yong Zhu, Licheng Sun, Fei Li

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Abstract

In artificial photosynthesis, molecule/semiconductor hybrids combine the merits of the high activity of molecular catalysts and the high stability of semiconductor light absorbers. We report here a host-guest strategy for hybrid photoanode fabrication, where phosphonate-derivatized cyclodextrins (p-CDs) as hosts were anchored on the surface of a tungsten oxide (WO₃) film, and molecular catalysts as guests were self-encapsulated into the cavities of p-CDs in either aqueous or organic media. By choosing an admantanyl cobaloxime complex (Co1) as a molecular water oxidation catalyst, the resulting WO₃|p-CD|Co1 photoanode exhibited high photoelectrochemical (PEC) activity and stability for water oxidation due to the unexpected efficient charge separation and the strong affinity between p-CD and catalyst. In addition, the WO₃|p-CD was identified to be a versatile platform for catalyst loading, when a 4-hydroxy-2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) derivative was employed as the guest molecule, the conversion yield of PEC alcohol oxidation to aldehyde was dramatically increased.

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来源期刊

Chem Environmental Science-Environmental Chemistry

CiteScore

32.40

自引率

1.30%

发文量

281

期刊介绍： Chem, affiliated with Cell as its sister journal, serves as a platform for groundbreaking research and illustrates how fundamental inquiries in chemistry and its related fields can contribute to addressing future global challenges. It was established in 2016, and is currently edited by Robert Eagling.