UM
Mechanistic insights into NO‒H2 reaction over Pt/boron-doped graphene catalyst
Yao,Zhenhua1; Li,Lei2; Liu,Xuguang3; Hui,Kwun Nam4; Shi,Ling1; Zhou,Furong1; Hu,Maocong1; Hui,K. S.5
2021-03-15
Source PublicationJournal of Hazardous Materials
ISSN0304-3894
Volume406
AbstractThis work presents a systematical experimental and density functional theory (DFT) studies to reveal the mechanism of NO reduction by H reaction over platinum nanoparticles (NPs) deposited on boron-doped graphene (denoted as Pt/BG) catalyst. Both characterizations and DFT calculations identified boron (in Pt/BG) as an additional NO adsorption site other than the widely recognized Pt NPs. Moreover, BG led to a decrease of Pt NPs size in Pt/BG, which facilitated hydrogen spillover. The mathematical and physical criteria of the Langmuir-Hinshelwood dual-site kinetic model over the Pt/BG were satisfied, indicating that adsorbed NO on boron (in Pt/BG) was further activated by H-spillover. On the other hand, Pt/graphene (Pt/Gr) demonstrated a typical Langmuir-Hinshelwood single-site mechanism where Pt NPs solely served as active sites for NO adsorption. This work helps understand NO-H reaction over Pt/BG and Pt/Gr catalysts in a closely mechanistic view and provides new insights into roles of active sites for improving the design of catalysts for NO abatement.
KeywordDFT study Graphene-based catalysis Kinetic modeling Langmuir−Hinshelwood dual-site mechanism NO abatement
DOI10.1016/j.jhazmat.2020.124327
URLView the original
Language英语
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Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorHu,Maocong
Affiliation1.Hubei Key Laboratory of Industrial Fume and Dust Pollution Control,and Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,Jianghan University,Wuhan,430056,China
2.Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM) of Chongqing,Yangtze Normal University,Chongqing,408100,China
3.College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao,266042,China
4.Institute of Applied Physics and Materials Engineering (IAPME) University of Macau Avenida da Universidade,Taipa,China
5.School of Engineering,University of East Anglia,Norwich,NR4 7TJ,United Kingdom
Recommended Citation
GB/T 7714
Yao,Zhenhua,Li,Lei,Liu,Xuguang,et al. Mechanistic insights into NO‒H2 reaction over Pt/boron-doped graphene catalyst[J]. Journal of Hazardous Materials,2021,406.
APA Yao,Zhenhua,Li,Lei,Liu,Xuguang,Hui,Kwun Nam,Shi,Ling,Zhou,Furong,Hu,Maocong,&Hui,K. S..(2021).Mechanistic insights into NO‒H2 reaction over Pt/boron-doped graphene catalyst.Journal of Hazardous Materials,406.
MLA Yao,Zhenhua,et al."Mechanistic insights into NO‒H2 reaction over Pt/boron-doped graphene catalyst".Journal of Hazardous Materials 406(2021).
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