Local Atomic and Electronic Structure of Pt-Os Nanoplates and Nanofibers Derived from the Single-Source Precursor (NH4)2[Pt0.5Os0.5Cl6] | Sciact - CRIS-система Института катализа

Local Atomic and Electronic Structure of Pt-Os Nanoplates and Nanofibers Derived from the Single-Source Precursor (NH4)2[Pt0.5Os0.5Cl6] Научная публикация

Журнал

Journal of Nanoparticle Research
ISSN: 1388-0764 , E-ISSN: 1572-896X

Вых. Данные

Год: 2022, Том: 24, Номер статьи : 5, Страниц : 23 DOI: 10.1007/s11051-021-05378-z

Ключевые слова

Alloy morphology; Bimetallic alloy; Electronic structure; Nanoalloy; Synchrotron radiation; XAFS

Авторы

Zvereva V.V. ¹ , Asanov I.P. ¹ , Yusenko K.V. ² , Zadesenec A.V. ¹ , Plyusnin P.E. ¹ , Gerasimov E.Y. ³ , Maksimovskiy E.A. ¹ , Korenev S.V. ¹ , Asanova T.I. ¹

Организации

1	Siberian Brunch of the Russian Academy of Sciences, Nikolaev Institute of Inorganic Chemistry, Lavrentiev Ave 3, 630090 Novosibirsk, Russia
2	BAM Federal Institute of Materials Research and Testing, Richard-Willstatter Str. 11, 12489 Berlin, Germany
3	Siberian Brunch of the Russian Academy of Sciences, Boreskov Institute of Catalysis, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia

Информация о финансировании (3)

1	Министерство образования и науки Российской Федерации	FWUZ-2021-0002 (121031700315-2)
2	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	FWUZ-2021-0005 (121031700313-8)
3	Российский фонд фундаментальных исследований	19-02-00308 (АААА-А19-119011590024-7)

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.

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 CAPlusCA OpenAlex

Поступила в редакцию:	27 июл. 2021 г.
Принята к публикации:	24 нояб. 2021 г.
Опубликована online:	31 дек. 2021 г.
Опубликована в печати:	1 янв. 2022 г.

Web of science:	WOS:000736484100001
Scopus:	2-s2.0-85122104761
РИНЦ:	47548394
Chemical Abstracts:	2022:20895
Chemical Abstracts (print):	181:22109
OpenAlex:	W4206315853

БД	Цитирований
Scopus	2
Web of science	3
OpenAlex	2