Enhanced Carrier Spatial Separation and Interfacial Transfer for Photocatalytic Cyanation of Olefins
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作者
Zhang, Shuyi; Chu, Changqing; Huang, Min; Wu, Bo; Zhong, Liangshu; Sun, Yuhan
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刊物名称
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
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年、卷、文献号
2022, 10, 2168-0485
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关键词
Zhang, Shuyi; Chu, Changqing; Huang, Min; Wu, Bo; Zhong, Liangshu; Sun, Yuhan
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摘要
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. Ni-0 and MnOx 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.
