Insights into the interface of NiCo_(2)O_(4) spinel/LaCoO_(3) perovskite nano-composite for CO and soot oxidation  

作　　者：Neha Harshita Singh Satya Vir Singh 

机构地区：[1]Department of Chemical Engineering,Indian Institute of Technology(BHU),Varanasi,221005,India [2]Department of Botany,Institute of Science,Banaras Hindu University,Varanasi,221005,India

出　　处：《Journal of Environmental Sciences》2024年第4期339-349,共11页环境科学学报（英文版）

摘　　要：In the quest for the development of thermally stable,highly active and low-cost catalysts for use in catalyzed diesel particulate filter,nano-composites are new areas of research.Therefore,we reported the easy synthesis of spinel NiCo_(2)O_(4)/perovskite LaCoO_(3) nano-composite,and its individual oxides NiCo_(2)O_(4)and LaCoO_(3) for comparison.The detailed insights into the physio-chemical characteristics of formed NiCo_(2)O_(4)/LaCoO_(3) nano-composite were done based on various characterization analysis such as X-ray diffraction(XRD),Fourier transform infrared(FT-IR),N_(2) physiosorption,scanning electron microscopy-energy dispersive spectroscopy(SEM-EDX),transmission electron microscopy(TEM),and X-ray photoelectron spectroscopy(XPS).The characterization analysis of NiCo_(2)O_(4)/LaCoO_(3) revealed the successful formation of a chemical interface possessing strong interfacial interaction,resulting in desirable physicochemical characteristics such as small crystallite size,abundant mesoporosity,high specific surface area and activation of surface lattice oxygen.Owing to the desirable characteristics,the activity results over NiCo_(2)O_(4)/LaCoO_(3) nano-composite showed the excellent CO oxidation performance and high soot oxidation activity,recyclability and thermal stability.This work mainly attempts to emphasize the effectiveness of the facile,inexpensive and conventionally used precipitation method for the successful formation of highly efficient nano-composites.

关 键 词：LaCoO_(3) NiCo_(2)O_(4) Spinel/perovskite CO oxidation Soot oxidation Chemical interface 

分 类 号：X701[环境科学与工程—环境工程] TQ426[化学工程] TB332[一般工业技术—材料科学与工程]