{"title":"CuCeZrO2-δ催化剂烟尘氧化活性及抗硫中毒性能的实验研究","authors":"Bin Guan, Junyan Chen, Zhongqi Zhuang, Lei Zhu, Zeren Ma, Xuehan Hu, Chenyu Zhu, Sikai Zhao, Kaiyou Shu, Hongtao Dang, Junjie Gao, Luyang Zhang, Tiankui Zhu, Zhen Huang","doi":"10.1016/j.matchemphys.2025.131244","DOIUrl":null,"url":null,"abstract":"<div><div>In this paper, CuCeZrO<sub>2-δ</sub> catalyst for soot oxidation was prepared by SHS method. At the same time, through sulfur-processing and reaction in the atmosphere containing SO<sub>2,</sub> the sulfur resistance of this series of catalysts was evaluated, and the catalysts were characterized by TEM, XPS, XRD, N<sub>2</sub> isothermal adsorption desorption, In situ DRIFTS, etc. Cu loading on CeZrO<sub>2-δ</sub> can promote soot combustion and improve CO<sub>2</sub> selectivity to a certain extent, and its overall performance is better than Pt noble metal catalyst. This is because Cu loading can make crystal grains more dispersed, and promote the reaction of NO to generate NO<sub>2</sub> on the catalyst surface. The overall sulfur resistance of CuCeZrO<sub>2-δ</sub> is better than that of Pt catalyst. Sulfur poisoning reduced the dispersion of catalyst grains, significantly reduced the active oxygen O<sub>A</sub> adsorbed on the catalyst surface, and led to the reduction of the process rate of NO oxidation to NO<sub>2</sub> on the catalyst surface. Compared with CuO and CeZrO<sub>2-δ</sub> catalysts, CuCeZrO<sub>2-δ</sub> has both strong NO oxidation capacity and excellent NO<sub>2</sub> storage capacity, and CuO and CeZrO<sub>2-δ</sub> have a strong synergistic effect, which greatly improves their respective advantages. The adsorption capacity of CuCeZrO<sub>2-δ</sub> catalyst after sulfur poisoning was not affected. The deactivation of the catalyst is mainly due to the poisoning of Cu element, which weakens the ability of the catalyst to oxidize NO.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"345 ","pages":"Article 131244"},"PeriodicalIF":4.7000,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental study on the soot oxidation activity and sulfur poisoning resistance of CuCeZrO2-δ catalyst\",\"authors\":\"Bin Guan, Junyan Chen, Zhongqi Zhuang, Lei Zhu, Zeren Ma, Xuehan Hu, Chenyu Zhu, Sikai Zhao, Kaiyou Shu, Hongtao Dang, Junjie Gao, Luyang Zhang, Tiankui Zhu, Zhen Huang\",\"doi\":\"10.1016/j.matchemphys.2025.131244\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In this paper, CuCeZrO<sub>2-δ</sub> catalyst for soot oxidation was prepared by SHS method. At the same time, through sulfur-processing and reaction in the atmosphere containing SO<sub>2,</sub> the sulfur resistance of this series of catalysts was evaluated, and the catalysts were characterized by TEM, XPS, XRD, N<sub>2</sub> isothermal adsorption desorption, In situ DRIFTS, etc. Cu loading on CeZrO<sub>2-δ</sub> can promote soot combustion and improve CO<sub>2</sub> selectivity to a certain extent, and its overall performance is better than Pt noble metal catalyst. This is because Cu loading can make crystal grains more dispersed, and promote the reaction of NO to generate NO<sub>2</sub> on the catalyst surface. The overall sulfur resistance of CuCeZrO<sub>2-δ</sub> is better than that of Pt catalyst. Sulfur poisoning reduced the dispersion of catalyst grains, significantly reduced the active oxygen O<sub>A</sub> adsorbed on the catalyst surface, and led to the reduction of the process rate of NO oxidation to NO<sub>2</sub> on the catalyst surface. Compared with CuO and CeZrO<sub>2-δ</sub> catalysts, CuCeZrO<sub>2-δ</sub> has both strong NO oxidation capacity and excellent NO<sub>2</sub> storage capacity, and CuO and CeZrO<sub>2-δ</sub> have a strong synergistic effect, which greatly improves their respective advantages. The adsorption capacity of CuCeZrO<sub>2-δ</sub> catalyst after sulfur poisoning was not affected. The deactivation of the catalyst is mainly due to the poisoning of Cu element, which weakens the ability of the catalyst to oxidize NO.</div></div>\",\"PeriodicalId\":18227,\"journal\":{\"name\":\"Materials Chemistry and Physics\",\"volume\":\"345 \",\"pages\":\"Article 131244\"},\"PeriodicalIF\":4.7000,\"publicationDate\":\"2025-07-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Chemistry and Physics\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0254058425008909\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Chemistry and Physics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0254058425008909","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Experimental study on the soot oxidation activity and sulfur poisoning resistance of CuCeZrO2-δ catalyst
In this paper, CuCeZrO2-δ catalyst for soot oxidation was prepared by SHS method. At the same time, through sulfur-processing and reaction in the atmosphere containing SO2, the sulfur resistance of this series of catalysts was evaluated, and the catalysts were characterized by TEM, XPS, XRD, N2 isothermal adsorption desorption, In situ DRIFTS, etc. Cu loading on CeZrO2-δ can promote soot combustion and improve CO2 selectivity to a certain extent, and its overall performance is better than Pt noble metal catalyst. This is because Cu loading can make crystal grains more dispersed, and promote the reaction of NO to generate NO2 on the catalyst surface. The overall sulfur resistance of CuCeZrO2-δ is better than that of Pt catalyst. Sulfur poisoning reduced the dispersion of catalyst grains, significantly reduced the active oxygen OA adsorbed on the catalyst surface, and led to the reduction of the process rate of NO oxidation to NO2 on the catalyst surface. Compared with CuO and CeZrO2-δ catalysts, CuCeZrO2-δ has both strong NO oxidation capacity and excellent NO2 storage capacity, and CuO and CeZrO2-δ have a strong synergistic effect, which greatly improves their respective advantages. The adsorption capacity of CuCeZrO2-δ catalyst after sulfur poisoning was not affected. The deactivation of the catalyst is mainly due to the poisoning of Cu element, which weakens the ability of the catalyst to oxidize NO.
期刊介绍:
Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.