Enhanced Carrier Spatial Separation and Interfacial Transfer for Photocatalytic Cyanation of Olefins

Photocatalysis provides a promising route to alleviate energy crises under mild reaction conditions. However, the low carrier separation efficiency greatly limits its industrial application. Herein, a fast interfacial channel to accelerate photocarrier transfer is rationally designed by selectively...

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Bibliographic Details
Published in:ACS sustainable chemistry & engineering 2022-01, Vol.10 (2), p.831-837
Main Authors: Zhang, Shuyi, Chu, Changqing, Huang, Min, Wu, Bo, Zhong, Liangshu, Sun, Yuhan
Format: Article
Language:English
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Summary:Photocatalysis provides a promising route to alleviate energy crises under mild reaction conditions. However, the low carrier separation efficiency greatly limits its industrial application. Herein, a fast interfacial channel to accelerate photocarrier transfer is rationally designed by selectively photodepositing two non-noble cocatalysts Ni and Mn on commercial TiO2 (P25). The as-obtained activity is enhanced nearly up to 60-fold higher than that of P25 for photocatalytic cyanation of olefins. Ni0 and MnO x function as the photogenic electron and hole traps, respectively, suppressing carrier recombination. In addition, a compact interface with lower resistance and a shorter migration distance is formed between cocatalysts and TiO2, further enhancing the activity. This work may provide a cheap and facile method to design photocatalysts with high charge mobility and promising potential for large-scale application.
ISSN:2168-0485
2168-0485
DOI:10.1021/acssuschemeng.1c06288