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Maximizing the catalytic function of hydrogen spillover in platinum-encapsulated aluminosilicates with controlled nanostructures

Author

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  • Juhwan Im

    (Korea Advanced Institute of Science and Technology)

  • Hyeyoung Shin

    (Korea Advanced Institute of Science and Technology, Graduate School of Energy, Environment, Water, and Sustainability (EEWS))

  • Haeyoun Jang

    (Korea Advanced Institute of Science and Technology)

  • Hyungjun Kim

    (Korea Advanced Institute of Science and Technology, Graduate School of Energy, Environment, Water, and Sustainability (EEWS))

  • Minkee Choi

    (Korea Advanced Institute of Science and Technology)

Abstract

Hydrogen spillover has been studied for several decades, but its nature, catalytic functions and even its existence remain topics of vigorous debate. This is a consequence of the lack of model catalysts that can provide direct evidences of the existence of hydrogen spillover and simplify the catalytic interpretation. Here we use platinum encapsulated in a dense aluminosilicate matrix with controlled diffusional properties and surface hydroxyl concentrations to elucidate the catalytic functions of hydrogen spillover. The catalytic investigation and theoretical modelling show that surface hydroxyls, presumably Brønsted acids, are crucial for utilizing the catalytic functions of hydrogen spillover on the aluminosilicate surface. The catalysts with optimized nanostructure show remarkable activities in hydro-/dehydrogenation, but virtually no activity for hydrogenolysis. This distinct chemoselectivity may be beneficial in industrially important hydroconversions such as propane dehydrogenation to propylene because the undesired hydrogenolysis pathway producing light hydrocarbons of low value (methane and ethane) is greatly suppressed.

Suggested Citation

  • Juhwan Im & Hyeyoung Shin & Haeyoun Jang & Hyungjun Kim & Minkee Choi, 2014. "Maximizing the catalytic function of hydrogen spillover in platinum-encapsulated aluminosilicates with controlled nanostructures," Nature Communications, Nature, vol. 5(1), pages 1-8, May.
  • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4370
    DOI: 10.1038/ncomms4370
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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. Xiao-Jue Bai & Caoyu Yang & Zhiyong Tang, 2024. "Enabling long-distance hydrogen spillover in nonreducible metal-organic frameworks for catalytic reaction," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    3. Li, Sen & Guo, Longhui & He, Xinyu & Qiao, Congzhen & Tian, Yajie, 2022. "Synthesis of uniform Ni nanoparticles encapsulated in ZSM–5 for selective hydrodeoxygenation of phenolics," Renewable Energy, Elsevier, vol. 194(C), pages 89-99.
    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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