Chinese Journal of Catalysis ›› 2025, Vol. 77: 153-170.DOI: 10.1016/S1872-2067(25)64782-6

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Remote hydrogen-spillover effect on catalytic transnitrilation for biomass-based nitrile synthesis

Guipeng Zhang, Yan Bin, Yanxin Wang, Jinzhu Chen*()   

  1. College of Chemistry and Materials Science, Jinan University, Guangzhou 511443, Guangdong, China
  • Received:2025-05-08 Accepted:2025-06-30 Online:2025-10-18 Published:2025-10-05
  • Contact: *E-mail: chenjz@jnu.edu.cn (J. Chen).
  • Supported by:
    National Natural Science Foundation of China(22075104);Guangdong Basic and Applied Basic Research Foundation(2025A1515010832)

Abstract:

Acid-nitrile exchange reaction (transnitrilation) is a state-of-the-art strategy for nitrile synthesis with a promising industrial application. Herein, a dedicated catalytic system for transnitrilation was designed based on remote H-spillover effect by physically mixing Pt nanoparticles-encapsulated in hollow ZSM-5 (Pt@ZSM-5) and Ni-doped Nb2O5 (Ni/Nb2O5) under 10%-H2/N2. The Pt@ZSM-5 acts as a primary active-center for H2-dissociation over Pt to form H-spillover; while, Ni/Nb2O5 serves as an acceptor-site of H-spillover. Upon uptake of the H-spillover, the doped-reversible Ni2+/Ni+ couples in the Ni/Nb2O5 significantly facilitate migrations of proton (Brönsted-acid site) and surface vacancy (Lewis-acid site) throughout its surface, thus enhancing and enriching its surface-acidic sites for the catalytic transnitrilation. Kinetic analysis demonstrates nitrile-activation over Lewis-acid site of Ni/Nb2O5 as rate-determining step of the transnitrilation. This research provides a molecular-scale and fundamental understanding of remote H-spillover effect on a solid acid for an improved catalytic performance by in-situ regulation on its surface-acid type and strength.

Key words: Acidity, Biomass, Hydrogen spillover, Surface vacancy, Transnitrilation