Issue 47, 2023

Highly active low-temperature HCHO oxidation of mesoporous Pt/CeO2 derived from Pt/CeBDC

Abstract

In the present work, mesoporous Pt/CeO2(MOF) was synthesized from Pt-containing CeBDC by high-temperature treatment for application in low-temperature HCHO oxidation. The catalytic results show that Pt/CeO2(MOF) possesses enhanced HCHO oxidation performance where its HCHO conversion rate is up to 78% while that of a commercial CeO2-supported Pt catalyst is only 31% at room temperature. Simultaneously, in a long-term HCHO oxidation experiment, Pt/CeO2(MOF) can remain catalytically stable. Kinetic studies demonstrate the more likely oxidation of HCHO molecules on Pt/CeO2(MOF). Structural characterization shows that Pt/CeO2(MOF) does not have an organic composition, which is elementally identical to that of a commercial CeO2-supported Pt catalyst. The Pt nanoparticles of Pt/CeO2(MOF) are mainly dispersed in the mesopores of CeO2 to significantly increase the number of Pt–O–Ce interfaces. Due to its structural characteristics, the mesoporous Pt/CeO2(MOF) possesses more reactive oxygen species, including peroxides (O22−). HCHO-DRIFTS studies demonstrate that the reaction rates of the two steps of HCHO decomposition, i.e. DOM transformation and CO oxidation, dramatically increase on Pt/CeO2(MOF). Moreover, the formate decomposition step of Pt/CeO2(MOF) is relatively faster than those of control catalysts. These factors could be responsible for the excellent low-temperature HCHO oxidation performance of the mesoporous Pt/CeO2(MOF).

Graphical abstract: Highly active low-temperature HCHO oxidation of mesoporous Pt/CeO2 derived from Pt/CeBDC

Article information

Article type
Paper
Submitted
31 Jul 2023
Accepted
01 Nov 2023
First published
22 Nov 2023

New J. Chem., 2023,47, 21905-21915

Highly active low-temperature HCHO oxidation of mesoporous Pt/CeO2 derived from Pt/CeBDC

K. Shi, S. Lv, Z. Hua, C. Ruan, X. Liu, N. Wu, C. Mao and L. Li, New J. Chem., 2023, 47, 21905 DOI: 10.1039/D3NJ03565D

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