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Local coulomb attraction for enhanced H2 evolution stability of metal sulfide photocatalysts
Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2017-09-06 , DOI: 10.1016/j.apcatb.2017.09.012
Jun Jie Zhao , Yu Hang Li , Peng Fei Liu , Yu Lei Wang , Xu Lei Du , Xue Lu Wang , Hui Dan Zeng , Li Rong Zheng , Hua Gui Yang

Cadmiun sulfide (CdS) is considered as a promising semiconductor photocatalyst for its outstanding light absorbance and photoinduced charge separation, but it suffers from severe photocorrosion, mainly due to the sluggish kinetics of holes transfer. In this work, we introduce the strong local Coulomb attraction, which is demonstrated via the in situ K-edge X-ray absorption near edge (XANES) analysis, to accelerate the migration of holes for long-term photocatalytic activity. As a proof-of-concept sample, the hole-attraction Fe2O3/CdS nanorods evidence an outstanding stability of at least 6 days without obvious deactivation, and feature with an excellent H2 evolution rate of 20.7 mmol g−1 h−1. Moreover, this Coulomb attraction strategy can be leveraged to enhance the photocatalytic performance of Zn0.5Cd0.5S, indicating the wide application of the strategy.



中文翻译:

局部库仑吸引增强金属硫化物光催化剂的H 2析出稳定性

硫化镉(CdSun)因其出色的吸光率和光致电荷分离而被认为是有前途的半导体光催化剂,但由于空穴传输的动力学缓慢,它遭受了严重的光腐蚀。在这项工作中,我们引入了强大的局部库仑吸引力,这通过原位K边缘X射线近边缘吸收(XANES)分析得到证明,以加速空穴的迁移以实现长期的光催化活性。作为证明的概念的样品,空穴吸引力的Fe 2 ö 3 / CdS的纳米棒证据至少6天的显着的稳定性没有明显失活,和特征具有优异ħ 2 20.7毫摩尔克进化速率-1  ħ - 1个。此外,可以利用这种库仑吸引策略来增强Zn 0.5 Cd 0.5 S的光催化性能,表明该策略的广泛应用。

更新日期:2017-09-06
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