Fe2O3-modified CuO catalyst for efficient catalytic silicon hydrochlorination to trichlorosilane: catalyst structural evolution

Ning Qi; Baofang Jin; Yongxia Zhu; Yuanyuan Dong; Liqing Ban; Zhanguo Zhang; Jiajian Gao; Ziyi Zhong; Guangwen Xu; Fabing Su

doi:10.1016/j.apcata.2023.119327

Fe2O3-modified CuO catalyst for efficient catalytic silicon hydrochlorination to trichlorosilane: catalyst structural evolution

Ning Qi, Baofang Jin^*, Yongxia Zhu, Yuanyuan Dong, Liqing Ban^*, Zhanguo Zhang, Jiajian Gao^*, Ziyi Zhong, Guangwen Xu, Fabing Su^*

^*Corresponding author for this work

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Catalytic hydrochlorination of Si is an effective route to manufacture trichlorosilane (TCS), the main feedstock of high-purity Si for solar cells. However, the understanding of its catalytic process is still limited. Herein, we prepared CuO catalysts modified with Fe2O3 promoter (Fe2O3-CuO) by one-step hydrothermal method and investigated their catalytic performance for producing TCS. Compared with the non-catalytic case, pure CuO catalyst, and the Fe2O3-CuO-M catalyst obtained by mechanically mixing CuO with Fe2O3, the Fe2O3-CuO catalyst exhibits the highest TCS selectivity and Si conversion. The introduction of Fe2O3 facilitates lattice oxygen migration of CuO due to the electron interactions between Fe2O3 and CuO. During the reaction, CuO transforms into CuCl2 and CuCl2·2H2O, then to CuCl. The latter is the key intermediate for forming the active CuxSi phase. This work discloses the transformation of the CuO catalyst during the Si hydrochlorination reaction, and provides new insights into the catalytic mechanism.

Original language	English
Journal	Applied Catalysis A: General
Volume	664
DOIs	https://doi.org/10.1016/j.apcata.2023.119327
State	Published - 25 Aug 2023

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10.1016/j.apcata.2023.119327

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@article{1c62f02efef64189bdff9ba12ddcca43,

title = "Fe2O3-modified CuO catalyst for efficient catalytic silicon hydrochlorination to trichlorosilane: catalyst structural evolution",

abstract = "Catalytic hydrochlorination of Si is an effective route to manufacture trichlorosilane (TCS), the main feedstock of high-purity Si for solar cells. However, the understanding of its catalytic process is still limited. Herein, we prepared CuO catalysts modified with Fe2O3 promoter (Fe2O3-CuO) by one-step hydrothermal method and investigated their catalytic performance for producing TCS. Compared with the non-catalytic case, pure CuO catalyst, and the Fe2O3-CuO-M catalyst obtained by mechanically mixing CuO with Fe2O3, the Fe2O3-CuO catalyst exhibits the highest TCS selectivity and Si conversion. The introduction of Fe2O3 facilitates lattice oxygen migration of CuO due to the electron interactions between Fe2O3 and CuO. During the reaction, CuO transforms into CuCl2 and CuCl2·2H2O, then to CuCl. The latter is the key intermediate for forming the active CuxSi phase. This work discloses the transformation of the CuO catalyst during the Si hydrochlorination reaction, and provides new insights into the catalytic mechanism.",

author = "Ning Qi and Baofang Jin and Yongxia Zhu and Yuanyuan Dong and Liqing Ban and Zhanguo Zhang and Jiajian Gao and Ziyi Zhong and Guangwen Xu and Fabing Su",

year = "2023",

month = aug,

day = "25",

doi = "10.1016/j.apcata.2023.119327",

language = "英语",

volume = "664",

journal = "Applied Catalysis A: General",

issn = "0926-860X",

publisher = "Elsevier",

}

TY - JOUR

T1 - Fe2O3-modified CuO catalyst for efficient catalytic silicon hydrochlorination to trichlorosilane: catalyst structural evolution

AU - Qi, Ning

AU - Jin, Baofang

AU - Zhu, Yongxia

AU - Dong, Yuanyuan

AU - Ban, Liqing

AU - Zhang, Zhanguo

AU - Gao, Jiajian

AU - Zhong, Ziyi

AU - Xu, Guangwen

AU - Su, Fabing

PY - 2023/8/25

Y1 - 2023/8/25

N2 - Catalytic hydrochlorination of Si is an effective route to manufacture trichlorosilane (TCS), the main feedstock of high-purity Si for solar cells. However, the understanding of its catalytic process is still limited. Herein, we prepared CuO catalysts modified with Fe2O3 promoter (Fe2O3-CuO) by one-step hydrothermal method and investigated their catalytic performance for producing TCS. Compared with the non-catalytic case, pure CuO catalyst, and the Fe2O3-CuO-M catalyst obtained by mechanically mixing CuO with Fe2O3, the Fe2O3-CuO catalyst exhibits the highest TCS selectivity and Si conversion. The introduction of Fe2O3 facilitates lattice oxygen migration of CuO due to the electron interactions between Fe2O3 and CuO. During the reaction, CuO transforms into CuCl2 and CuCl2·2H2O, then to CuCl. The latter is the key intermediate for forming the active CuxSi phase. This work discloses the transformation of the CuO catalyst during the Si hydrochlorination reaction, and provides new insights into the catalytic mechanism.

AB - Catalytic hydrochlorination of Si is an effective route to manufacture trichlorosilane (TCS), the main feedstock of high-purity Si for solar cells. However, the understanding of its catalytic process is still limited. Herein, we prepared CuO catalysts modified with Fe2O3 promoter (Fe2O3-CuO) by one-step hydrothermal method and investigated their catalytic performance for producing TCS. Compared with the non-catalytic case, pure CuO catalyst, and the Fe2O3-CuO-M catalyst obtained by mechanically mixing CuO with Fe2O3, the Fe2O3-CuO catalyst exhibits the highest TCS selectivity and Si conversion. The introduction of Fe2O3 facilitates lattice oxygen migration of CuO due to the electron interactions between Fe2O3 and CuO. During the reaction, CuO transforms into CuCl2 and CuCl2·2H2O, then to CuCl. The latter is the key intermediate for forming the active CuxSi phase. This work discloses the transformation of the CuO catalyst during the Si hydrochlorination reaction, and provides new insights into the catalytic mechanism.

U2 - 10.1016/j.apcata.2023.119327

DO - 10.1016/j.apcata.2023.119327

M3 - 文章

SN - 0926-860X

VL - 664

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

ER -

Fe2O3-modified CuO catalyst for efficient catalytic silicon hydrochlorination to trichlorosilane: catalyst structural evolution

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