TY - JOUR

T1 - Ceria–Zirconia Supported Platinum Catalysts for the Water-Gas Shift Reaction: The Influence of Support Composition

AU - Gorlova, A. M.

AU - Pakharukova, V. P.

AU - Stonkus, O. A.

AU - Rogozhnikov, V. N.

AU - Gladky, A. Y.

AU - Snytnikov, P. V.

AU - Potemkin, D. I.

N1 - This work was supported by Russian Science Foundation under the project no. 21-73-20075 (А.М. Gorlova, V.P. Pakharukova, О.А. Stonkus, V.N. Rogozhnikov).

PY - 2023/8

Y1 - 2023/8

N2 - The study is presented on the influence of the composition of a ceria-zirconia support on the structure and the activity in water-gas shift reaction of platinum catalysts (Pt/Ce0.75Zr0.25O2 and Pt/Ce0.4Zr0.5Y0.05La0.05O2). The structure diagnostics of the samples were performed using high-resolution transmission electron microscopy, powder X-ray diffraction, CO chemisorption and X-ray atomic pair distribution function method. It was shown that the catalysts contain highly dispersed platinum particles not exceeding 2 nm in size. Platinum particles supported on Ce0.75Zr0.25O2 are smaller due to the higher specific surface area of the support. The catalysts Pt/Ce0.75Zr0.25O2 and Pt/Ce0.4Zr0.5Y0.05La0.05O2 proved to have similar efficiency while having the same platinum content. It was assumed that the catalysts supported on Ce0.4Zr0.5Y0.05La0.05O2 demonstrate a slightly higher turnover frequency per platinum surface atom, but it is likely compensated by the difference in the supported metal particle size.

AB - The study is presented on the influence of the composition of a ceria-zirconia support on the structure and the activity in water-gas shift reaction of platinum catalysts (Pt/Ce0.75Zr0.25O2 and Pt/Ce0.4Zr0.5Y0.05La0.05O2). The structure diagnostics of the samples were performed using high-resolution transmission electron microscopy, powder X-ray diffraction, CO chemisorption and X-ray atomic pair distribution function method. It was shown that the catalysts contain highly dispersed platinum particles not exceeding 2 nm in size. Platinum particles supported on Ce0.75Zr0.25O2 are smaller due to the higher specific surface area of the support. The catalysts Pt/Ce0.75Zr0.25O2 and Pt/Ce0.4Zr0.5Y0.05La0.05O2 proved to have similar efficiency while having the same platinum content. It was assumed that the catalysts supported on Ce0.4Zr0.5Y0.05La0.05O2 demonstrate a slightly higher turnover frequency per platinum surface atom, but it is likely compensated by the difference in the supported metal particle size.

KW - ceria-zirconia

KW - hydrogen purification

KW - platinum catalyst

KW - water-gas shift

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85165612003&origin=inward&txGid=02efa881dfcc0973be0ded77cef3d5e1

UR - https://www.mendeley.com/catalogue/d55b85fc-9dbb-337c-858b-695602a4fe8b/

U2 - 10.1134/S0023158423040031

DO - 10.1134/S0023158423040031

M3 - Article

VL - 64

SP - 449

EP - 457

JO - Kinetics and Catalysis

JF - Kinetics and Catalysis

SN - 0023-1584

IS - 4

ER -