催化作用
层状双氢氧化物
化学
脱氢
无机化学
转移加氢
X射线光电子能谱
煅烧
吸附
反应中间体
化学工程
物理化学
有机化学
钌
工程类
作者
Yingyu Ren,Yusen Yang,Lifang Chen,Lei Wang,Yawen Shi,Ping Yin,Wenlong Wang,Mingfei Shao,Xin Zhang,Min Wei
标识
DOI:10.1016/j.apcatb.2022.121515
摘要
As a safe and environmentally friendly selective hydrogenation method, catalytic transfer hydrogenation (CTH) has aroused great interest in preparation of high-value-added products from biomass derived resources. Herein, a Cu-based catalyst (Cu/CuAl-MMO-400) was prepared by structural topological transformation of layered double hydroxides (LDHs) precursor, which displayed promising catalytic behavior toward CTH reaction of furfural (FAL) with 2-propanol (2-POL) as the hydrogen donor. Notably, the reaction rate is as high as 0.125 mol g−1 h−1, which is superior to previously reported non-noble metal catalysts. A combination investigation based on XPS, XANES and Bader charge confirms the co-existence of Cu0 and Cu+ sites on the surface of Cu nanoparticles. Both experimental studies (in situ DRIFTS and isotope labelling MS) and DFT calculations reveal that the Cu0−Cu+ synergistic effect plays a vital role in determining catalytic behavior: the Cu+ species acts as both dehydrogenation and hydrogenation active site; while the Cu0 site promotes the transfer of H atoms between adsorbed substrates. This work substantiates a Cu0 −Cu+ synergetic catalysis by establishing structure-property correlation and revealing reaction pathway, which could be extended to other CTH reactions in the upgrading processes of biomass.
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