文献类型：期刊文献

英文题名：Morphology-Tuned Activity of Ru/Nb2O5 Catalysts for Ketone Reductive Amination

作者：Guo, Wanjun[1,2];Tong, Tao[1,2];Liu, Xiaohui[1,2];Guo, Yong[1,2];Wang, Yanqin[1,2]

机构：[1]East China Univ Sci Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：11

期号：16

起止页码：4130

外文期刊名：CHEMCATCHEM

收录：;EI(收录号：20192106956492);WOS:【SCI-EXPANDED(收录号:WOS:000498036500062)】；

基金：This work was supported financially by the NSFC of China (No. 21832002, 21872050, 21808063), the Fundamental Research Funds for the Central Universities (222201718003) and the Science and Technology Commission of Shanghai Municipality (18ZR1408500, 10dz2220500).

语种：英文

外文关键词：reduction amination; biomass; DRIFT-MS; niobium oxide; geometric effect

摘要：Amines are important compounds in natural products and medicines. Specifically, cyclopentylamine is one of the value-added chemicals widely used in the production of pesticides, cosmetics and medicines. In this work, three Ru/Nb2O5 catalysts with different Nb2O5 morphologies were used in the reductive amination of cyclopentanone under mild reaction conditions (90 degrees C, 2 MPa H-2), among which 1%Ru/Nb2O5 L catalyst exhibits best performance with the yield of cyclopentylamine reaching 84%. This catalytic system is stable and has not significant deactivation even after 5 runs in the durability test. In addition, this catalyst can be extended to a series of aldehydes/ketones. Further comprehensive characterizations (XPS analysis and CO-adsorption DRIFT) reveal that the electronic effect of Ru species can be ruled out; instead, the activity of the catalyst is strongly influenced by the geometric effect. Layered Nb2O5 material possesses the highest surface area, resulting in the highest Ru dispersion, and therefore shows the highest catalytic activity. The in-situ DRIFT-MS technique was also used to reveal and understand the reaction mechanism. It is found that Ru species play a key role in activating carbonyl groups. This study illustrates a promising application of Ru/Nb2O5-Layer catalyst in the synthesis of amine and provides an understanding to the reaction mechanism.