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Volume 31
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Structure Driven Tuning of the Catalytic Performance of PtCe-Modified Zeolite ZSM-5 in the CO Oxidation

by
Marina I Shilina
1,*,
Irina N Krotova
1,
Konstantin I. Maslakov
1,
Stanislava A Petrova
1,
Olga V Udalova
2 and
Tatiana N Rostovshchikova
1
1
Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia
2
Semenov Federal Research Center for Chemical Physics, RAS, 119991 Moscow, Russia
*
Author to whom correspondence should be addressed.
Molecules 2026, 31(1), 156; https://doi.org/10.3390/molecules31010156 (registering DOI)
Submission received: 16 December 2025 / Revised: 26 December 2025 / Accepted: 27 December 2025 / Published: 1 January 2026
(This article belongs to the Special Issue Catalytic Green Reductions and Oxidations, 2nd Edition)
Versions Notes

Abstract

The catalytic oxidation of CO is of great technological importance for the treatment of vehicle and industrial exhaust gases. PtCe-catalysts of low-temperature CO oxidation were prepared by the impregnation of ZSM-5 zeolite (Z) with aqueous solutions of H2PtCl6 and Ce(NO3)3, varying the order of metal deposition and thermal treatment conditions. The relationships between structure transformations and catalyst performance were established based on the SEM, TEM, EDX, DRIFT, and X-ray photoelectron spectroscopies data. For the Ce/Pt/Z sample, in which cerium was deposited after platinum, the 100% CO conversion temperature was only 120 °C. The inverse deposition sequence of metals (Pt/Ce/Z catalyst) resulted in CO oxidation at a higher temperature that can be decreased to 110 °C by redox treatment. The prepared catalysts were also active in the CO oxidation in excess hydrogen (PROX) but were not selective enough. However, the activity of PtCe-modified ZSM-5 enhanced greatly in the repeated cycles of CO oxidation (TOX) after testing in PROX. It is suggested that enhancing the interaction between Pt and Ce is a key factor in tuning the catalyst performance. The 0.2 wt.% Pt catalysts showed the best performance and provided complete CO conversion at 95 °C, which is a pronounced result for low-loaded Pt catalysts.
Keywords: zeolite ZSM-5; platinum; cerium; catalysis; carbon monoxide; oxidation zeolite ZSM-5; platinum; cerium; catalysis; carbon monoxide; oxidation

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MDPI and ACS Style

Shilina, M.I.; Krotova, I.N.; Maslakov, K.I.; Petrova, S.A.; Udalova, O.V.; Rostovshchikova, T.N. Structure Driven Tuning of the Catalytic Performance of PtCe-Modified Zeolite ZSM-5 in the CO Oxidation. Molecules 2026, 31, 156. https://doi.org/10.3390/molecules31010156

AMA Style

Shilina MI, Krotova IN, Maslakov KI, Petrova SA, Udalova OV, Rostovshchikova TN. Structure Driven Tuning of the Catalytic Performance of PtCe-Modified Zeolite ZSM-5 in the CO Oxidation. Molecules. 2026; 31(1):156. https://doi.org/10.3390/molecules31010156

Chicago/Turabian Style

Shilina, Marina I, Irina N Krotova, Konstantin I. Maslakov, Stanislava A Petrova, Olga V Udalova, and Tatiana N Rostovshchikova. 2026. "Structure Driven Tuning of the Catalytic Performance of PtCe-Modified Zeolite ZSM-5 in the CO Oxidation" Molecules 31, no. 1: 156. https://doi.org/10.3390/molecules31010156

APA Style

Shilina, M. I., Krotova, I. N., Maslakov, K. I., Petrova, S. A., Udalova, O. V., & Rostovshchikova, T. N. (2026). Structure Driven Tuning of the Catalytic Performance of PtCe-Modified Zeolite ZSM-5 in the CO Oxidation. Molecules, 31(1), 156. https://doi.org/10.3390/molecules31010156

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