Pd Cluster Nanowires as Highly Efficient Catalysts for Selective Hydrogenation Reactions

Authors: Zhang, Zhi-Cheng; Zhang, Xin¹; Yu, Qi-Yu²; Liu, Zhi-Chang¹; Xu, Chun-Ming¹; Gao, Jin-Sen¹; Zhuang, Jing²; Wang, Xun²

Source: Chemistry ?? A European Journal, Volume 18, Number 9, 27 February 2012 , pp. 2639-2645(7)

Publisher: Wiley-Blackwell

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Abstract:

<title type="main">Abstract</title>

Palladium is a key catalyst invaluable to many industrial processes and fine-chemical synthesis. Although recent progress has allowed the synthesis of Pd nanoparticles with various shapes by using different techniques, the facile synthesis of Pd nanocrystals and turning them into a highly active, selective, and stable catalyst systems still remain challenging. Herein, we report the highly selective one-pot synthesis of monodisperse Pd cluster nanowires in aqueous solution; these consist of interconnected nanoparticles and may serve as highly active catalysts because of the enrichment of high index facets on the surface, including {443}, {331}, and {221} steps. For the first time, carbon nanotube and γ-Al₂O₃ immobilized Pd cluster nanowires showed highly enhanced catalytic performance in the liquid-phase selective hydrogenation of cinnamaldehyde and gas-phase hydrogenation of 1,3butadiene relative to immobilized Pd icosahedra and nanocubes, as well as commercial Pd catalysts.

Document Type: Research article

DOI: http://dx.doi.org/10.1002/chem.201102903

Affiliations: 1: State Key Laboratory of Heavy Oil Processing, Department of Chemical Engineering, China University of Petroleum, Beijing 102249 (P.R. China) 2: Department of Chemistry, Tsinghua University, Beijing 100084 (P.R. China)

Publication date: 2012-02-27