On the interpretation of XPS spectra of metal (Pt,Pt–Sn) nanoparticle/graphene systems |
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| Affiliation: | 1. School of Environmental Sciences and Resource, Inner Mongolia University, No. 235 West College Road, Hohhot, Inner Mongolia 010021, PR China;2. Department of Chemical and Petroleum Engineering, University of Wyoming, WY 82070, USA;1. Division of Environment, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;2. Department of Chemical and Biomolecular Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;3. Materials Characterization and Preparation Facility, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;4. Advanced Engineering Materials Facility, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;1. MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China;2. Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, PR China;3. Guangdong Provincial Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, PR China;1. The Key Laboratory of Chemical Metallurgy Engineering of Liaoning Province, School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan, Liaoning Province, 114051, China;2. Department of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA;3. Angang Heavy Machinery Co., Ltd, Anshan, Liaoning Province, 114051, China;4. Technical University of Cluj-Napoca, The Directorate of Research, Development and Innovation Management (DMCDI), Constantin Daicoviciu St., No. 15, Cluj-Napoca, 400020, Cluj County, Romania;1. Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, PO Box 5825, Doha, Qatar;2. Physics Department, Faculty of Education, Thamar University, Dhamar, Republic of Yemen;3. College of Life and Health Sciences, Hamad Bin Khalifa University (HBKU), PO Box 34110, Doha, Qatar |
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| Abstract: | This Letter discusses the X-ray photoelectron spectroscopy (XPS) results of an article on Pt and Pt–Sn nanoparticles dispersed on graphene nanosheets. I argue that the authors’ interpretation is largely unwarranted because it neglects the spin–orbit multiplicity and the branching ratio of XPS signals arising from electron levels with l > 0, and the fact that XPS peaks of given electron levels and given chemical species possess precise full with at half maximum (FWHM) values, and binding energy (BE) values. I suggest an interpretation which offers a more accurate insight into the chemical composition and the catalytic properties of these nanoparticle systems. |
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