Pt-Ni core-shell structure with Pt-skin and electronic effect on catalytic performance

In order to improve the catalytic performance of the nitrobenzene hydrogenation rearrangement to prepare p-aminophenol, a bimetallic Pt-Ni/C (PNC) catalyst was synthesized. Taking advantage of the synergistic effect of Ni and Pt to enhance product selectivity and catalytic performance stability, the electrons in Ni are moved to Pt by the electron effect, which affects the catalyst's ability to activate H2 as well as the amount of hydrogen activated. Furthermore, due to the strong Pt(5d)-Ni(3d) coupling effect, Ni can effectively maintain Pt stability in the acidic system and reduce Pt dissolution. The stability of the PNC can be found to be greatly enhanced compared to the Pt/C (PC) catalyst, and p-aminophenol selectivity is greatly enhanced, showing excellent catalytic performance. (c) 2023 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.