Gold and Cobalt Nanoparticles Dispersed on N‐Doped Carbon Matrix as a Catalyst for 4‐Nitrophenol Reduction. Issue 10 (8th March 2022)

• Record Type: Journal Article
• Authors: Li, Caifeng; Su, Yan; Cheng, Mengmeng; Liu, Jinglei; Hou, Shifeng
• Is Part Of: ChemistrySelect. Volume 7:Issue 10(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-03-08
• Subjects: Catalytic reduction of 4-nitrophenol -- Carbon-Supported Catalysts -- Gold -- Replacement reaction; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202103739
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: In this work, gold, cobalt nanoparticles dispersed on a porous N doped Carbon matrix (Au/Co@N−C), which were prepared by replacement reaction to anchor Au nanoparticles (NPs) on the surface of the carbonized ZIF‐67 (Co@N−C). The Au/Co@N−C composites display excellent catalytic activity for the reduction of 4‐nitrophenol (4‐NP) due to the highly ordered carbon frameworks, which offered porous structure and space to improve the capability of electronic transmission. Moreover, the method of replacement reaction avoided the aggregation of gold nanoparticles effectively, which enhanced the catalytic activity of the Au/Co@N−C composites. The catalytic properties of nanocomposites were assessed through the reduction reaction of 4‐nitrophenol (4‐NP) translate 4‐NP into 4‐aminophenol (4‐AP) with excessive NaBH4, the K app was up to 37.46×10 −3 s −1 and the conversion rate of 4‐NP remained at 89 % after five consecutive cycles. Thus, this work has excellent promising preparation of noble metal catalysts and application in the catalysis of phenols. Abstract : To uniformly disperse the Au NPs on the N‐doped porous carbon supports (Co@N−C), we prepared ZIF‐67 by the hydrothermal method and then pyrolysed to form the Co@N−C. The nanocomposites (Au/Co@N−C) was synthesized via the replacement reaction between the partial Co NPs and Au ions to made the Au NPs loaded on the Co@N−C carriers.The Au/Co@N−C displayed excellent catalytic performance, cyclical stability, and easy recovery for the reduction reaction of 4‐NP.