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The tuned selective catalytic reduction behaviors of NO over the Pt/CeO2 catalysts by preferentially exposing different facets of CeO2 supports

Catalysis communications, 2022-12, Vol.172, p.106530, Article 106530 [Peer Reviewed Journal]

2022 The Authors ;ISSN: 1566-7367 ;EISSN: 1873-3905 ;DOI: 10.1016/j.catcom.2022.106530

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  • Title:
    The tuned selective catalytic reduction behaviors of NO over the Pt/CeO2 catalysts by preferentially exposing different facets of CeO2 supports
  • Author: Wang, Kaiqiang ; Zhang, Roujia ; Wu, Songze ; Chen, Mengyin ; Tang, Jie ; Zhao, Liming ; Liu, Yubing ; Fan, Yining
  • Subjects: CeO2 support ; Different exposed facet ; NO + CO reaction ; Oxygen vacancy ; Pt catalyst
  • Is Part Of: Catalysis communications, 2022-12, Vol.172, p.106530, Article 106530
  • Description: For the Pt catalysts supported on CeO2 nanosheet (NS), nanopolyhedron (NP) and nanorod (NR) with preferentially exposed {100}, {111} and {110} facets, respectively, the NO conversion and N2 selectivity for NO + CO reaction at 100–250 °C exhibit the order as Pt/CeO2-NS{100} > Pt/CeO2-NP{111} > Pt/CeO2-NR{110}. The higher surface concentration of oxygen vacancies on CeO2 (NS) can promote the dissociation of NO and result in the highest performance of Pt/CeO2-NS{100} catalyst. Moreover, CO intensively chemisorbs on the Pt2+ ions on CeO2 (NR) support, suppressing the dissociative chemisorption of NO and leading to lower reaction performance of Pt/CeO2-NR{110} catalyst. [Display omitted] •The facet–dependent effect of Pt/CeO2 catalysts for NO + CO reaction has been studied.•The higher O2− vacancy concentration on Pt/CeO2-NS{100} catalyst promotes NO dissociation.•The more negatively charged O2− on CeO2{110} results in stronger CO adsorption on Pt2+.
  • Publisher: Elsevier B.V
  • Language: English
  • Identifier: ISSN: 1566-7367
    EISSN: 1873-3905
    DOI: 10.1016/j.catcom.2022.106530
  • Source: DAOJ: Directory of Open Access Journals
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