Local Atomic and Electronic Structure of Pt-Os Nanoplates and Nanofibers Derived from the Single-Source Precursor (NH4)2[Pt0.5Os0.5Cl6] Full article
| Journal |
Journal of Nanoparticle Research
ISSN: 1388-0764 , E-ISSN: 1572-896X |
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| Output data | Year: 2022, Volume: 24, Article number : 5, Pages count : 23 DOI: 10.1007/s11051-021-05378-z | ||||||
| Tags | Alloy morphology; Bimetallic alloy; Electronic structure; Nanoalloy; Synchrotron radiation; XAFS | ||||||
| Authors |
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| Affiliations |
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Funding (3)
| 1 | The Ministry of Education and Science of the Russian Federation | FWUZ-2021-0002 (121031700315-2) |
| 2 | Ministry of Science and Higher Education of the Russian Federation | FWUZ-2021-0005 (121031700313-8) |
| 3 | Russian Foundation for Basic Research | 19-02-00308 (АААА-А19-119011590024-7) |
Abstract:
Nowadays, Pt-Os binary systems are mainly considered as catalysts and electrocatalysts, but the role of Os in these processes is still poorly understood. The electronic structure of Pt-Os nanosystems remains a few studied as well. Using bimetallic (NH4)2[Pt0.5Os0.5Cl6] as a single-source precursor for preparing Pt-Os nanoalloy through the thermal decomposition in hydrogen and inert atmospheres, the relation of morphology, atomic ordering, and electronic structure of Pt-Os nanoalloy was examined by in situ Quick XAFS, XPS, PXRD, SEM, and HRTEM techniques. Being the only variable parameter, the decomposition atmosphere was found to govern the morphology of the Pt-Os nanoalloy and change the atomic ordering (alloying extent), which involves a change in the electronic structure. In a hydrogen atmosphere, the nanofibers (NFs) (ø ~ 5–6 nm) with the atomic ordering Oscore&Pt-richshell were observed to form; in a nitrogen atmosphere, thin nanoplates (NPLs) (~ 12 nm) with the atomic architecture Os-richcore&Pt-richshell were found out. The depletion in the Os 5d5/2 and Pt 5d5/2,3/2 states was revealed for Pt-Os nanoalloys. This unusual result disagrees with the known d-band theory and indicates that there is a gain of non-d conduction electron counts at one or both sites. Mixed conductivity may exist in such Pt-Os nanoalloy that may be responsible for a manifestation of new physical properties of this binary system. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
Cite:
Zvereva V.V.
, Asanov I.P.
, Yusenko K.V.
, Zadesenec A.V.
, Plyusnin P.E.
, Gerasimov E.Y.
, Maksimovskiy E.A.
, Korenev S.V.
, Asanova T.I.
Local Atomic and Electronic Structure of Pt-Os Nanoplates and Nanofibers Derived from the Single-Source Precursor (NH4)2[Pt0.5Os0.5Cl6]
Journal of Nanoparticle Research. 2022. V.24. 5 :1-23. DOI: 10.1007/s11051-021-05378-z WOS Scopus РИНЦ ANCAN OpenAlex
Local Atomic and Electronic Structure of Pt-Os Nanoplates and Nanofibers Derived from the Single-Source Precursor (NH4)2[Pt0.5Os0.5Cl6]
Journal of Nanoparticle Research. 2022. V.24. 5 :1-23. DOI: 10.1007/s11051-021-05378-z WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Jul 27, 2021 |
| Accepted: | Nov 24, 2021 |
| Published online: | Dec 31, 2021 |
| Published print: | Jan 1, 2022 |
Identifiers:
| Web of science: | WOS:000736484100001 |
| Scopus: | 2-s2.0-85122104761 |
| Elibrary: | 47548394 |
| Chemical Abstracts: | 2022:20895 |
| Chemical Abstracts (print): | 181:22109 |
| OpenAlex: | W4206315853 |