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author:

Wan, Q. (Wan, Q..) [1] | Guo, H. (Guo, H..) [2] | Lin, S. (Lin, S..) [3]

Indexed by:

Scopus

Abstract:

Pristine graphene is widely considered to be chemically inert, but recent experimental studies have suggested that it can provide frustrated Lewis pairs (FLPs) for activating H2under mild conditions. Using density functional theory (DFT) and ab initio molecular dynamics (AIMD) calculations, we explore in this work the possibility that corrugation in pristine graphene is responsible for the formation of FLPs and thus its observed catalytic activity. Our DFT results demonstrate that the ease of H2activation is proportional to the degree of corrugation of graphene. For corrugated graphene, the two catalytic para-carbon sites show clear signs of transient Lewis acid/base properties along the reaction coordinate, a pre-requisite for FLPs. Furthermore, the two dissociating H atoms carry opposite charges, suggesting heterolytic activation of H2. This behavior is confirmed by AIMD simulations at room temperature, which show that fluctuations of the corrugated graphene lead to C sites with diverse distances and varying charges. These observations offer a plausible rationalization of the experimental observations and possible design principles for FLP catalysts using homogeneous two-dimensional materials. © 2022 American Chemical Society. All rights reserved.

Keyword:

corrugation dynamics frustrated Lewis pairs graphene H2activation hydrogenation

Community:

  • [ 1 ] [Wan, Q.]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350002, China
  • [ 2 ] [Guo, H.]Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, NM 87131, United States
  • [ 3 ] [Lin, S.]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350002, China

Reprint 's Address:

  • [Lin, S.]State Key Laboratory of Photocatalysis on Energy and Environment, China

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Source :

ACS Catalysis

ISSN: 2155-5435

Year: 2022

Issue: 23

Volume: 12

Page: 14601-14608

1 2 . 9

JCR@2022

1 1 . 7 0 0

JCR@2023

ESI HC Threshold:74

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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