ACS Catalysis p. 6425 - 6434 (2019)
Update date:2022-08-05
Topics: Catalyst Ionic Hydrogenation
Wu, Qifan
Zhang, Chao
Arai, Masahiko
Zhang, Bin
Shi, Ruhui
Wu, Peixuan
Wang, Zhuangqing
Liu, Qiang
Liu, Ke
Lin, Weiwei
Cheng, Haiyang
Zhao, Fengyu
A Pt/TiH2 catalyst having hydrogen storage and release capability was investigated for selective hydrogenation of trans-cinnamaldehyde (CAL) to cinnamyl alcohol (COL) with gaseous dihydrogen. The catalytic behavior of this catalyst was significantly different from that of a reference Pt/TiO2 catalyst with respect to the product selectivity and the hydrogenation mechanism. The Pt/TiH2 catalyst showed a COL selectivity of 97% at a CAL conversion of 98%, which was ascribed to the function of a Pt crystallite-support boundary layer that caused the preferential adsorption of CAL with its carbonyl group. Furthermore, the carbonyl group was hydrogenated by hydride species (H+, H-) supplied from the support and the hydride species consumed were compensated from gaseous dihydrogen; hydrogen atoms were formed by ordinary homolytic cleavage on Pt and then these hydrogen atoms moved onto the surface of TiH2 and diffused into the bulk of the support, during which those simultaneously changed to hydride species (H+, H-) via electron transfer with titanium species and hydride vacancies therein. The surface and bulk diffusion of the hydrogen atoms from Pt to TiH2 support should be the dominant step rather than their addition to the carbonyl group of CAL (ordinary hydrogenation). That is, ionic hydrogenation occurs with Pt/TiH2 in the presence of gaseous dihydrogen.
View MoreCangzhou Senary Chemical Science-tech Co., Ltd
Contact:+86-317-3563899, 3563699
Address:168 Jinde Road, Cangzhou, Hebei, China
Contact:+852-8198 2399
Address:9E, Leapont Industrial Building, 18-28 Wo Liu Hang Road, Shatin, New Territories, Hong Kong
Jiangsu King Road New Materials Co., Ltd.
website:http://www.jskingroad.com
Contact:0519-85720726 0519-85720721 13584535752
Address:No.1,Weihua Road,Xinbei District,Changzhou City,Jiangsu Province
Nanjing Habo Medical Technology Co., Ltd.
Contact:025-85769882
Address:No.108. Ganjiabian east. Qixia District .Nanjing
Jiangsu Fengshan Group Co., Ltd.
Contact:86-25-86558671
Address:1903,Central International Mansion 105-6 North Zhongshan Road, Nanjing, China
Doi:10.1071/C97159
(1997)Doi:10.1039/P19920003257
(1992)Doi:10.1023/A:1015387108748
(2002)Doi:10.1021/jm00345a009
(1982)Doi:10.1007/BF00962277
(1981)Doi:10.1021/ja01186a013
(1948)