Rui Tang - Highly stable Pt nanoparticle catalyst supported by polyphenol-grafted collagen fiber and its catalytic application in the hydrogenation of olefins

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      Publication Details (including relevant citation   information):

      Hao Wu, Rui Tang, Qiang He, Xuepin Liao, Bi Shi. Highly stable   Pt  nanoparticle catalyst supported by polyphenol-grafted   collagen fiber and  its catalytic application in the   hydrogenation of olefins. J. Chem.  Technol. Biotechnol.   2009: 1702-1711.

      Abstract:

     

        BACKGROUND: Collagen fiber (CF) is a      potential biopolymer support for preparing Pt nanoparticle     catalyst.  Previous work has shown that the interaction     between CF and platinum  group metals is not strong enough     to fully immobilize these metals.  Therefore,     epigallocatechin-3-gallate (EGCG), which contains     multiple  orthophenolic hydroxyls, was grafted onto the     surface of CF in order to  enhance the immobilization of     Pt nanoparticles on CF. The methods of  preparing     EGCG-grafted CF (EGCG-CF) and EGCG-CF supported Pt      nanoparticle catalyst (Pt-EGCG-CF) were optimized. The     catalytic  activity and selectivity of Pt-EGCG-CF for     hydrogenation of typical  olefins were investigated.  

     

        RESULTS: Scanning electron microscopy     displayed the ordered fibrous morphology  of Pt-EGCG-CF.     The presence of EGCG grafted on the CF surface and the      coordinate interaction of EGCG and Pt were confirmed by     X-ray  photoelectron spectroscopy analysis. X-ray     diffraction and transmission  electron microscopy analyses     showed that Pt nanoparticles with diameter  1–3 nm were     uniformly dispersed on the outer surface of CF.      Hydrogenation of olefins catalyzed by Pt-EGCG-CF was conducted     under  mild conditions. This heterogeneous catalyst     exhibited outstanding  activity and nearly 100%     selectivity for the hydrogenation of CC     double bonds. Moreover, this catalyst presented satisfactory     reusability and storage stability in air.  

     

        CONCLUSION: An efficient method has been     established to prepare a highly active,  selective and     stable Pt nanoparticle catalyst for the hydrogenation of      olefins using EGCG-grafted CF as a bio-support. Copyright ©     2009 Society  of Chemical Industry  

      Address (URL): http://onlinelibrary.wiley.com/doi/10.1002/jctb.2234/abstract