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author:

Long, Jinlin (Long, Jinlin.) [1] | Xie, Xiuqiang (Xie, Xiuqiang.) [2] | Xu, Jie (Xu, Jie.) [3] | Gu, Quan (Gu, Quan.) [4] | Chen, Liming (Chen, Liming.) [5] | Wang, Xuxu (Wang, Xuxu.) [6]

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EI

Abstract:

This work demonstrates the molecular engineering of active sites on a graphene scaffold. It was found that the N-doped graphene nanosheets prepared by a high-temperature nitridation procedure represent a novel chemical function of efficiently catalyzing aerobic alcohol oxidation. Among three types of nitrogen species doped into the graphene lattice - pyridinic N, pyrrolic N, and graphitic N - the graphitic sp2 N species were established to be catalytically active centers for the aerobic oxidation reaction based on good linear correlation with the activity results. Kinetic analysis showed that the N-doped graphene-catalyzed aerobic alcohol oxidation proceeds via a Langmuir-Hinshelwood pathway and has moderate activation energy (56.1 ± 3.5 kJ·mol-1 for the benzyl alcohol oxidation) close to that (51.4 kJ·mol-1) proceeding on the catalyst Ru/Al 2O3 reported in literature. An adduct mechanism was proposed to be different remarkably from that occurring on the noble metal catalyst. The possible formation of a sp2 N-O2 adduct transition state, which can oxidize alcohols directly to aldehydes without any byproduct, including H2O2 and carboxylic acids, may be a key element step. Our results advance graphene chemistry and open a window to study the graphitic sp2 nitrogen catalysis. © 2012 American Chemical Society.

Keyword:

Activation analysis Activation energy Alcohols Aldehydes Aluminum nitride Doping (additives) Graphene Nanocatalysts Nanosheets Nitrogen Oxidation Precious metals Scaffolds

Community:

  • [ 1 ] [Long, Jinlin]Fujian Provincial Key Laboratory of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
  • [ 2 ] [Xie, Xiuqiang]Fujian Provincial Key Laboratory of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
  • [ 3 ] [Xu, Jie]Fujian Provincial Key Laboratory of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
  • [ 4 ] [Gu, Quan]Fujian Provincial Key Laboratory of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
  • [ 5 ] [Chen, Liming]Fujian Provincial Key Laboratory of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
  • [ 6 ] [Wang, Xuxu]Fujian Provincial Key Laboratory of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China

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Source :

ACS Catalysis

ISSN: 2155-5435

Year: 2012

Issue: 4

Volume: 2

Page: 622-631

5 . 2 6 5

JCR@2012

1 1 . 7 0 0

JCR@2023

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 383

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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