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Enhancing Metal–Support Interactions by Molybdenum Carbide: An Efficient Strategy toward the Chemoselective Hydrogenation of α,β‐Unsaturated Aldehydes
Author(s) -
He Sina,
Shao ZhengJiang,
Shu Yijin,
Shi Zhangping,
Cao XiaoMing,
Gao Qingsheng,
Hu Peijun,
Tang Yi
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201600323
Subject(s) - molybdenum , metal , carbide , chemoselectivity , materials science , chemistry , organic chemistry , metallurgy , catalysis
Metal–support interactions are desired to optimize the catalytic turnover on metals. Herein, the enhanced interactions by using a Mo 2 C nanowires support were utilized to modify the charge density of an Ir surface, accomplishing the selective hydrogenation of α,β‐unsaturated aldehydes on negatively charged Ir δ− species. The combined experimental and theoretical investigations showed that the Ir δ− species derive from the higher work function of Ir (vs. Mo 2 C) and the consequently electron transfer. In crotonaldehyde hydrogenation, Ir/Mo 2 C delivered a crotyl alcohol selectivity as high as 80 %, outperforming those of counterparts (<30 %) on silica. Moreover, such electronic metal–support interactions were also confirmed for Pt and Au, as compared with which, Ir/Mo 2 C was highlighted by its higher selectivity as well as the better activity. Additionally, the efficacy for various substrates further verified our Ir/Mo 2 C system to be competitive for chemoselective hydrogenation.