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Mild-temperature hydrodeoxygenation of vanillin over porous nitrogen-doped carbon black supported nickel nanoparticles

Abstract

Porous nitrogen-doped carbon black (NCB) is synthesized by facile carbonization of carbon black (CB) coated with polypyrrole (CB@polypyrrole) and used as support for Ni nanoparticles (NPs). Microstructure, reducibility and crystallinity of as-synthesized materials are investigated by transmission electron microscope (TEM), H2-TPR/TPD, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD), respectively. It is found that surface nitrogen species on NCB significantly promote the decomposition of the nickel precursor and the reduction of nickel oxide, and improve the stability of metallic Ni in ambient atmosphere. In the selective hydrodeoxygenation (HDO) of vanillin in aqueous phase at low hydrogen pressure (0.5 MPa) and mild temperature (<150 oC), Ni/NCB shows much higher activity than those of N-free catalysts, which is ascribed to the higher reducibility, the lower oxidation state of Ni NPs and the enhanced hydrogen spillover of Ni to the support. Moreover, the Ni/NCB catalyst is relatively cheap and easy scale-up production, thus achieving a low-cost transformation of biomass to bio-oils.

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Publication details

The article was received on 19 Feb 2017, accepted on 08 May 2017 and first published on 08 May 2017


Article type: Paper
DOI: 10.1039/C7GC00531H
Citation: Green Chem., 2017, Accepted Manuscript
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    Mild-temperature hydrodeoxygenation of vanillin over porous nitrogen-doped carbon black supported nickel nanoparticles

    R. Nie, H. Yang, H. Zhang, X. Yu, X. Lu, D. Zhou and Q.-H. Xia, Green Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7GC00531H

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