Promoted Glycerol Oxidation Reaction in an Interface-Confined Hierarchically Structured Catalyst

Zhongxin Chen, Cuibo Liu, Xiaoxu Zhao, Huan Yan, Jing Li, Pin Lyu, Yonghua Du, Shibo Xi, Kai Chi, Xiao Chi, Haisen Xu, Xing Li, Wei Fu, Kai Leng, Stephen J. Pennycook, Shuai Wang, Kian Ping Loh

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)

Abstract

Confined catalysis in a 2D system is of particular interest owing to the facet control of the catalysts and the anisotropic kinetics of reactants, which suppress side reactions and improve selectivity. Here, a 2D-confined system consisting of intercalated Pt nanosheets within few-layered graphene is demonstrated. The strong metal–substrate interaction between the Pt nanosheets and the graphene leads to the quasi-2D growth of Pt with a unique (100)/(111)/(100) faceted structure, thus providing excellent catalytic activity and selectivity toward one-carbon (C1) products for the glycerol oxidation reaction. A hierarchically porous graphene architecture, grown on carbon cloth, is used to fabricate the confined catalyst bed in order to enhance the mass-diffusion limitation in interface-confined reactions. Owing to its unique 3D porous structure, this graphene-confined Pt catalyst exhibits an extraordinary mass activity of 2910 mA mgPt −1 together with a formate selectivity of 79% at 60 °C. This paves the way toward rational designs of heterogeneous catalysts for energy-related applications.

Original languageEnglish
Article number1804763
JournalAdvanced Materials
Volume31
Issue number2
DOIs
Publication statusPublished - 11 Jan 2019
Externally publishedYes

Keywords

  • confined catalysis
  • electrocatalysis
  • glycerol oxidation
  • graphene
  • platinum nanosheets

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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