TY - JOUR

T1 - Pt1−xNix Alloy Nanoparticles Embedded in Self-Grown Carbon Nanofibers: Synthesis, Properties and Catalytic Activity in HER

AU - Popov, Anton A.

AU - Afonnikova, Sofya D.

AU - Varygin, Andrey D.

AU - Bauman, Yury I.

AU - Trenikhin, Mikhail V.

AU - Plyusnin, Pavel E.

AU - Shubin, Yury V.

AU - Vedyagin, Aleksey A.

AU - Mishakov, Ilya V.

N1 - This work was financially supported by the Russian Science Foundation (project No. 21-13-00414, https://rscf.ru/project/21-13-00414/, NIIC SB RAS). The catalytic experiments were supported by the Ministry of Science and Higher Education of the Russian Federation (project No. AAAA-A21-121011390054-1). Публикация для корректировки.

PY - 2023/3

Y1 - 2023/3

N2 - The development of new heterogeneous Pt-containing catalysts has retained its relevance over the past decades. The present paper describes the method to produce metal–carbon composites, Pt1−xNix/CNF, with an adjustable Pt/Ni ratio. The composites represent Pt1−xNix (x = 0.0–1.0) nanoparticles embedded within a structure of carbon nanofibers (CNF). The synthesis of the composites is based on a spontaneous disintegration of Pt1−xNix alloys in an ethylene-containing atmosphere with the formation of CNF. The initial Pt1−xNix alloys were prepared by thermolysis of multicomponent precursors. They possess a porous structure formed by fragments of 100–200 nm. As was shown by X-ray diffraction analysis, the crystal structure of the alloys containing 0–30 and 60–100 at.% Ni corresponds to a fcc lattice based on platinum (Fm-3m), while the Pt0.50Ni0.50 sample is an intermetallic compound with the tetragonal structure (P4/mmm). The impact of the Ni content in the Pt1−xNix samples on their activity in ethylene decomposition was studied as well. As was revealed, the efficiency of Pt1−xNix alloys in this process increases with the rise of Ni concentration. The composite samples were examined in an electrochemical hydrogen evolution reaction. The synthesized Pt1-xNix/CNF composites demonstrated superior activity if compared with the Pt/Vulcan commercial catalyst.

AB - The development of new heterogeneous Pt-containing catalysts has retained its relevance over the past decades. The present paper describes the method to produce metal–carbon composites, Pt1−xNix/CNF, with an adjustable Pt/Ni ratio. The composites represent Pt1−xNix (x = 0.0–1.0) nanoparticles embedded within a structure of carbon nanofibers (CNF). The synthesis of the composites is based on a spontaneous disintegration of Pt1−xNix alloys in an ethylene-containing atmosphere with the formation of CNF. The initial Pt1−xNix alloys were prepared by thermolysis of multicomponent precursors. They possess a porous structure formed by fragments of 100–200 nm. As was shown by X-ray diffraction analysis, the crystal structure of the alloys containing 0–30 and 60–100 at.% Ni corresponds to a fcc lattice based on platinum (Fm-3m), while the Pt0.50Ni0.50 sample is an intermetallic compound with the tetragonal structure (P4/mmm). The impact of the Ni content in the Pt1−xNix samples on their activity in ethylene decomposition was studied as well. As was revealed, the efficiency of Pt1−xNix alloys in this process increases with the rise of Ni concentration. The composite samples were examined in an electrochemical hydrogen evolution reaction. The synthesized Pt1-xNix/CNF composites demonstrated superior activity if compared with the Pt/Vulcan commercial catalyst.

KW - X-ray diffraction analysis

KW - carbon nanofibers

KW - electrochemical hydrogen evolution reaction

KW - nanoalloys

KW - nickel

KW - platinum

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85151496358&origin=inward&txGid=031b8877117b8f0ba482337f4d570660

UR - https://www.mendeley.com/catalogue/52d47f80-3131-3f10-83b0-0b3a3ab66fcc/

U2 - 10.3390/catal13030599

DO - 10.3390/catal13030599

M3 - Article

VL - 13

JO - Catalysts

JF - Catalysts

SN - 2073-4344

IS - 3

M1 - 599

ER -