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Highly selective hydrogenation of acetophenone over supported amorphous alloy catalyst
Author(s) -
Lv Zhiguo,
Wang Jiaomei,
Zhang Shuying,
Wang Bing,
Guo Zhenmei,
Zhang Chao
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5555
Subject(s) - chemistry , catalysis , acetophenone , selectivity , chemisorption , amorphous solid , adsorption , nickel , alloy , activation energy , inorganic chemistry , nuclear chemistry , chemical engineering , organic chemistry , engineering
Alpha‐phenylethanol (PE) is an essential chemical in the field of medicine and synthetic perfumery. Therefore, in this work, we used a supported Ni–B–P amorphous alloy catalyst (Ni–B–P/SiO 2 ) in the hydrogenation of acetophenone (AP) to α‐PE, which demonstrated excellent catalytic activity and selectivity, compared with Ni–B/SiO 2 (KBH 4 reduction of nickel salt). Ni–B–P/SiO 2 exhibited a high AP hydrogenation conversion of approximately 99%, whereas the PE selectivity reached up to 94%, which is approximately 1.4‐fold higher than that of Ni–B/SiO 2 (about 69%), thereby directly proving the unique inhibition of AP hydrogenation over hydrogenation of P in the Ni–B catalytic system. The doped P in Ni–B–P/SiO 2 enhances the oxidation resistance and maintains the valence stability of Ni and B. Furthermore, sufficient experimental data were collected to determine the kinetic parameters. Based on the Langmuir–Hinshelwood model, we assumed that (i) AP and H 2 compete for adsorption on Ni–B–P/SiO 2 ; (ii) AP has strong adsorptive capacity on Ni–B–P/SiO 2 ; and (iii) PE coverage on the catalyst was negligible. Then, the dynamic equation was derived, which indicated that experimental data agree well with the dynamic model. Finally, the activation energy was confirmed to be 50.73 KJ/mol. This report will open up an avenue for the industrialization of amorphous alloy catalysts.