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Origin of synergistic effects in bicomponent cobalt oxide-platinum catalysts for selective hydrogenation reaction

Author

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  • Jiankang Zhang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Zhe Gao

    (Chinese Academy of Sciences)

  • Sen Wang

    (Chinese Academy of Sciences)

  • Guofu Wang

    (Chinese Academy of Sciences)

  • Xiaofeng Gao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Baiyan Zhang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Shuangfeng Xing

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Shichao Zhao

    (Chinese Academy of Sciences)

  • Yong Qin

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

Abstract

The synergistic nature of bicomponent catalysts remains a challenging issue, due to the difficulty in constructing well-defined catalytic systems. Here we study the origin of synergistic effects in CoOx-Pt catalysts for selective hydrogenation by designing a series of closely contacted CoOxPt/TiO2 and spatially separated CoOx/TiO2/Pt catalysts by atomic layer deposition (ALD). For CoOx/TiO2/Pt, CoOx and platinum are separated by the walls of titania nanotubes, and the CoOx-Pt intimacy can be precisely tuned. Like CoOxPt/TiO2, the CoOx/TiO2/Pt shows higher selectivity to cinnamyl alcohol than monometallic TiO2/Pt, indicating that the CoOx-Pt nanoscale intimacy almost has no influence on the selectivity. The enhanced selectivity is ascribed to the increased oxygen vacancy resulting from the promoted hydrogen spillover. Moreover, platinum-oxygen vacancy interfacial sites are identified as the active sites by selectively covering CoOx or platinum by ALD. Our study provides a guide for the understanding of synergistic nature in bicomponent and bifunctional catalysts.

Suggested Citation

  • Jiankang Zhang & Zhe Gao & Sen Wang & Guofu Wang & Xiaofeng Gao & Baiyan Zhang & Shuangfeng Xing & Shichao Zhao & Yong Qin, 2019. "Origin of synergistic effects in bicomponent cobalt oxide-platinum catalysts for selective hydrogenation reaction," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-11970-8
    DOI: 10.1038/s41467-019-11970-8
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    Cited by:

    1. Mingwu Tan & Yanling Yang & Ying Yang & Jiali Chen & Zhaoxia Zhang & Gang Fu & Jingdong Lin & Shaolong Wan & Shuai Wang & Yong Wang, 2022. "Hydrogen spillover assisted by oxygenate molecules over nonreducible oxides," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Tianjiao Wang & Yu Xin & Bingfeng Chen & Bin Zhang & Sen Luan & Minghua Dong & Yuxuan Wu & Xiaomeng Cheng & Ye Liu & Huizhen Liu & Buxing Han, 2024. "Selective hydrodeoxygenation of α, β-unsaturated carbonyl compounds to alkenes," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    3. Yi Wang & Rong Yang & Yajun Ding & Bo Zhang & Hao Li & Bing Bai & Mingrun Li & Yi Cui & Jianping Xiao & Zhong-Shuai Wu, 2023. "Unraveling oxygen vacancy site mechanism of Rh-doped RuO2 catalyst for long-lasting acidic water oxidation," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    4. Zhida Gu & Mengke Li & Cheng Chen & Xinglong Zhang & Chengyang Luo & Yutao Yin & Ruifa Su & Suoying Zhang & Yu Shen & Yu Fu & Weina Zhang & Fengwei Huo, 2023. "Water-assisted hydrogen spillover in Pt nanoparticle-based metal–organic framework composites," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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