{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,16]],"date-time":"2026-02-16T15:38:31Z","timestamp":1771256311368,"version":"3.50.1"},"reference-count":42,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2024,8,7]],"date-time":"2024-08-07T00:00:00Z","timestamp":1722988800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Special Project for Sustainable Development Science Technology in Shenzhen","award":["KCXFZ20201221173000001"],"award-info":[{"award-number":["KCXFZ20201221173000001"]}]},{"name":"Special Project for Sustainable Development Science Technology in Shenzhen","award":["2023A0505010018"],"award-info":[{"award-number":["2023A0505010018"]}]},{"DOI":"10.13039\/501100012245","name":"Guangdong Science and Technology Program","doi-asserted-by":"publisher","award":["KCXFZ20201221173000001"],"award-info":[{"award-number":["KCXFZ20201221173000001"]}],"id":[{"id":"10.13039\/501100012245","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012245","name":"Guangdong Science and Technology Program","doi-asserted-by":"publisher","award":["2023A0505010018"],"award-info":[{"award-number":["2023A0505010018"]}],"id":[{"id":"10.13039\/501100012245","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>Zeolite-based catalysts efficiently catalyze the selective catalytic reduction of NOx with methane (CH4-SCR) for the environmentally friendly removal of nitrogen oxides, but suffer severe deactivation in high-temperature SO2- and H2O-containing flue gas. In this work, SSZ-39 zeolite (AEI topology) with high hydrothermal stability is reported for preparing CH4-SCR catalysts. Mild acid leaching with oxalic acid (OA) not only modulates the Si\/Al ratio of commercial SSZ-39 to a suitable value, but also removes some extra-framework Al atoms, introducing a small number of mesopores into the zeolite that alleviate diffusion limitation. Additional Co3O4 modification during indium exchange further enhances the catalytic activity of the resulting In-Co3O4\/H-SSZ-39(OA). The optimized sample exhibits remarkable performance in CH4-SCR under a gas hourly space velocity (GHSV) of 24,000 h\u22121 and in the presence of 5 vol% H2O. Even under harsh SO2- and H2O-containing high-temperature conditions, it shows satisfactory stability. Catalysts containing Co3O4 components demonstrate much higher CH4 conversion. The strong mutual interaction between Co3O4 and Br\u00f8nsted acid sites, confirmed by the temperature-programmed desorption of NO (NO-TPD), enables more stable NxOy species to be retained in In-Co3O4\/H-SSZ-39(OA) to supply further reactions at high temperatures.<\/jats:p>","DOI":"10.3390\/molecules29163747","type":"journal-article","created":{"date-parts":[[2024,8,8]],"date-time":"2024-08-08T07:01:25Z","timestamp":1723100485000},"page":"3747","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Engineering In-Co3O4\/H-SSZ-39(OA) Catalyst for CH4-SCR of NOx: Mild Oxalic Acid (OA) Leaching and Co3O4 Modification"],"prefix":"10.3390","volume":"29","author":[{"given":"Guanyu","family":"Chen","sequence":"first","affiliation":[{"name":"State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weixin","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5589-9031","authenticated-orcid":false,"given":"Rongshu","family":"Zhu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yanpeng","family":"Chen","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Minghu","family":"Zhao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9342-5395","authenticated-orcid":false,"given":"Mei","family":"Hong","sequence":"additional","affiliation":[{"name":"Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Advanced Materials, Peking University Shenzhen Graduate School (PKUSZ), Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,8,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"107270","DOI":"10.1016\/j.jece.2022.107270","article-title":"Selective catalytic reduction of NOx with CH4 over zeolite catalysts: Research progress, challenges and perspectives","volume":"10","author":"Xu","year":"2022","journal-title":"J. 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