doi:10.16597/j.cnki.issn.1002-154x.2025.03.008
贵金属催化剂用于 H₂ 选择性催化还原 NOₓ 的研究进展
朱红霞∗ 高 新
(国家知识产权局专利局专利审查协作北京中心, 北京 100160)
摘要
作者总结了贵金属催化剂用于 H₂ 选择性催化还原 (SCR) 氮氧化物 (NOₓ) 的研究进展，重点介绍了 H₂-SCR 的反应机理，以及铂、钯等金属催化剂的应用条件及其强化 H₂-SCR 反应的催化过程。最后，总结了 H₂-SCR 催化剂的密度泛函理论 (DFT) 的研究成果，比较了贵金属催化剂 H₂-SCR 过程的氢气吸附能、活化能以及水的比吸附/脱附能量，明确了不同贵金属催化剂在 NOₓ 还原过程中的限速步骤，并对未来贵金属 H₂-SCR 催化剂的研究发展进行了展望。
关键词 氢气选择性催化还原 氮氧化物 贵金属催化剂
Research Progress of Noble Metal Catalysts for H₂ Selective Catalytic Reduction of NOₓ
ZHU Hongxia∗ GAO Xin
(Patent Examination Cooperation(Beijing) Center of the Patent Office, CNIPA, Beijing 100160, China)
Abstract
In this paper, the research progress of noble metal catalysts used in H₂ selective catalytic reduction of nitrogen oxides (NOₓ) was reviewed, with emphasis on the reaction mechanism of H₂-SCR, the application conditions of platinum, palladium and other noble metal catalysts and their catalytic performance of H₂-SCR reaction. Finally, the research progress of density functional calculation (DFT) for H₂-SCR catalysts was summarized, the hydrogen adsorption energy, activation energy and specific adsorption/desorption energy of noble metal catalysts in the H₂-SCR process were compared, the rate-limiting steps of different metal catalysts in the NOₓ reduction process were defined, and the future research and development of precious metal catalysts were proposed.
Keywords hydrogen selective catalytic reduction nitrogen oxides noble metal catalyst