The cooperative promotion induced by Na modification of the Pd-Ce/USY catalyst for HCHO oxidation at room temperature.

Authors

Longbao Jiang, Jiani Zheng, Qiyong Li, Jia Liu, Fuda Li, Jiangfei Deng, Huangjian Luo, Wangchuan Xiao, Xiaofeng Liu

Published in

RSC advances. Aug 03, 2026. Epub Aug 03, 2026.

Abstract

Room-temperature catalytic oxidation is an important strategy for the efficient removal of indoor low-concentration HCHO. However, catalysts often suffer from insufficient generation of reactive oxygen species, accumulation of reaction intermediates, and decreased stability at low temperatures. In this study, Na modified Pd-Ce/USY catalysts were constructed using USY zeolite as the support, and the cooperative effect of Na and Ce on room-temperature HCHO oxidation was systematically investigated. Activity evaluation showed that the introduction of an appropriate amount of Na significantly enhanced the HCHO oxidation performance of the catalyst, and the Pd-Na-Ce/USY-R catalyst maintained 100% HCHO conversion during a 12 h continuous reaction. Various characterization results revealed that Na modification changes the framework acid-base properties and the interfacial oxygen environment, increases the population of defect-related oxygen species, and improves the low-temperature conversion of adsorbed HCHO-derived intermediates. The enhanced performance is attributed to the cooperative functions of Pd sites for HCHO/O₂ activation, CeO _x -associated sites for interfacial oxygen transfer, and Na-modified surface sites for accelerating intermediate removal.

PMID:
42548993
Bibliographic data and abstract were imported from PubMed on 04 Aug 2026.

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