Bifunctional mechanism for low-temperature Methanol-SCR on H-FER zeolite doped by trace amount of cobalt

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-03-04 DOI:10.1016/j.apcata.2025.120201

Dekai Liu , Han Sun , Ziying Hong , Chenxi He , Takashi Toyao , Masaya Matsuoka , Haijun Chen

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引用次数: 0

Abstract

Green methanol is a promising alternative to fossil fuels in the fields where decarbonization is a major challenge, such as maritime transport. Selective catalytic reduction of NO_x by methanol (Methanol-SCR) offers a perfect deNO_x solution for methanol engines because of the co-existence of methanol and NO_x in the exhaust. Here, we developed Co-H-FER zeolites containing only trace amount of cobalt as low as 0.05 wt% as Methanol-SCR catalysts, giving rise to a surprised enhancement of deNO_x activity at low temperature region (250–350 °C) with excellent selectivity towards N₂. Atomically dispersed [Co-OH]^2 + species play a vital role in facilitating the generation of HONO species, which contribute to the formation of nitromethane as an initial step for the overall Methanol-SCR reaction. Bifunctional catalytic active sites including both [Co-OH]²⁺ sites and zeolite solid acid sites has been proposed for Methanol-SCR at low temperature.

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.