TY - JOUR

T1 - Pt-Fe nanoalloy: Structure evolution study and catalytic properties in water gas shift reaction

AU - Gorlova, Anna

AU - Zadesenets, Andrey

AU - Filatov, Evgeniy

AU - Simonov, Pavel

AU - Korenev, Sergey

AU - Stonkus, Olga

AU - Sobyanin, Vladimir

AU - Snytnikov, Pavel

AU - Potemkin, Dmitriy

N1 - Funding Information: In the part of catalytic study the work was supported by the Russian Science Foundation under the Project № 19-73-00157 (D. Potemkin, A. Gorlova). In the part of samples preparation the work was supported by the Russian Science Foundation under the Project № 21-73-20203 (A. Zadesenets, E. Filatov). In the part of catalyst characterization by HRTEM technique the work was supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental order for Boreskov Institute of Catalysis (project AAAA-A21-121011390009-1). The HRTEM studies were carried out using facilities of the shared research center “National center of investigation of catalysts” at Boreskov Institute of Catalysis. Publisher Copyright: © 2022

PY - 2022/5

Y1 - 2022/5

N2 - In the present work we studied the properties of Pt0.5Cu0.5, Pt0.5Fe0.5, Pt0.33Ag0.67, Pt0.6Au0.4 nanoalloys in water gas shift (WGS) reaction for the first time. Cu, Fe, Ag, Au were chosen as modifiers due to the low catalytic activity in undesirable side reactions of carbon oxides methanation. Nanoalloys were synthesized via corresponding double complex salts decomposition, which provided the selective formation of bimetallic nanoparticles. A simulated reformate gas mixture, containing (vol.%) 10 CO, 15 CO2, 30 H2O and 45 H2, was used to evaluate the activity of these systems. Only Pt0.5Fe0.5 nanopowder was active, while Pt-FeOx metal-oxide composite was inert. The positive effect of Pt-Fe alloying on WGS performance was also confirmed for silica supported catalysts. TG and XRD in situ analysis reveal that Pt0.5Fe0.5 is stable toward oxidation under WGS reaction conditions (T < 350°C, reductive atmosphere), while Pt-FeOx undergoes partial reduction but without formation of Pt-Fe alloy nanoparticles.

AB - In the present work we studied the properties of Pt0.5Cu0.5, Pt0.5Fe0.5, Pt0.33Ag0.67, Pt0.6Au0.4 nanoalloys in water gas shift (WGS) reaction for the first time. Cu, Fe, Ag, Au were chosen as modifiers due to the low catalytic activity in undesirable side reactions of carbon oxides methanation. Nanoalloys were synthesized via corresponding double complex salts decomposition, which provided the selective formation of bimetallic nanoparticles. A simulated reformate gas mixture, containing (vol.%) 10 CO, 15 CO2, 30 H2O and 45 H2, was used to evaluate the activity of these systems. Only Pt0.5Fe0.5 nanopowder was active, while Pt-FeOx metal-oxide composite was inert. The positive effect of Pt-Fe alloying on WGS performance was also confirmed for silica supported catalysts. TG and XRD in situ analysis reveal that Pt0.5Fe0.5 is stable toward oxidation under WGS reaction conditions (T < 350°C, reductive atmosphere), while Pt-FeOx undergoes partial reduction but without formation of Pt-Fe alloy nanoparticles.

KW - Catalysis

KW - Hydrogen production

KW - Nanoalloy

KW - Platinum

KW - Water gas shift reaction

UR - http://www.scopus.com/inward/record.url?scp=85122837545&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/1401bd09-edfd-34df-a57a-28bf5ed9e972/

U2 - 10.1016/j.materresbull.2022.111727

DO - 10.1016/j.materresbull.2022.111727

M3 - Article

AN - SCOPUS:85122837545

VL - 149

JO - Materials Research Bulletin

JF - Materials Research Bulletin

SN - 0025-5408

M1 - 111727

ER -