Boron-doped graphene nanosheet-supported Pt: A highly active and selective catalyst for low temperature H2-SCR

Maocong Hu, Zhenhua Yao, Lili Li, Yung Hao Tsou, Liyuan Kuang, Xiaoyang Xu, Wen Zhang, Xianqin Wang

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

A series of boron-doped graphene-supported Pt (Pt/BG) nanosheets were designed and synthesized using a one-step facile hydrothermal method. ICP, XPS, and TPD results confirmed that boron atoms were successfully embedded into the graphene matrix. The selective catalytic reduction of nitric oxide with hydrogen (H2-SCR) was tested over Pt/BG catalysts. The multi-roles of doped-boron were investigated by Raman, BET, CO-chemisorption, H2-TPD, XPS, and NO-TPD. Boron doping led to a higher dispersion and smaller size of Pt nanoparticles, facilitated hydrogen spillover, promoted more metallic Pt formation, and increased both H2 and NO chemisorption, which were attributed to an enhanced Pt nucleation rate over doped-boron, electron donation from boron to Pt, and extra chemisorption sites. The reaction performances (conversion 94.7%, selectivity 90.3%, and TOF 0.092 s-1) were greatly promoted attributing to a bifunctional catalytic mechanism. This work paves the way to modify the structure and tune the chemisorption ability of graphene-based catalysts, and provides novel insights for designing high performance catalysts.

Original languageEnglish (US)
Pages (from-to)10203-10212
Number of pages10
JournalNanoscale
Volume10
Issue number21
DOIs
StatePublished - Jun 7 2018

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this