摘要
Diesel engines are widely used in automobiles,ships,and other fields because of their good economy and power performance;however,the use of diesel engines is often accompanied by the production of the soot particles,which can cause significant harm to the environment and humans;thus,catalytically eliminating soot particles is of great significance.A series of spindle-like CeO_(2)catalysts loaded with different contents of K and Co mixed oxides(K_(x)Co_(y)O_(δ)/CeO_(2))was successfully prepared via hydrothermal and incipient wetness methods.Due to the loading of K and Co mixed oxides on the surface of CeO_(2),the K_(x)Co_(y)O_(δ)/CeO_(2)catalysts have abundant oxygen vacancies,good redox performance,and NO oxidation ability.At the same time,the K_(x)Co_(y)O_(δ)/CeO_(2)catalysts have a special spindle-like morphology that helps the catalyst generate an increased number of active sites and oxygen vacancies;therefore,they have excellent catalytic performance for soot combustion reaction,including activity,stability,and water and sulfur resistance.Among them,the K_(0.05)Co_(0.05)O_(δ)/CeO_(2)catalyst has the highest soot combustion activity,with T_(10),T_(50),and T_(90)values of 287,325,and 349~℃,respectively.Due to the excellent catalytic performance,as well as the easy availability and low cost of the raw materials,the K_(x)Co_(y)O_(δ)/CeO_(2)catalysts have good development prospects in the field of catalytic soot elimination.
基金
Project supported by National Key R&D Program of China(2022YFB3506200)
the Science and Technology Major Program of Guangxi(GUIKEAA24206022)
National Natural Science Foundation of China(22372107,22402129)
Fundamental Research Funds for the Liaoning Universities(LJ212410166052,LJ212410166046)
the Ministry of Education's Collaborative Education Project on Industry and Education(230805940033356)
Postgraduate Education Reform Project of Liaoning Province(LNYJG2023280,LNYJG2022400)
Liaoning Xingliao Talented Youth Top Talent Program(XLYC2203007,XLYC2203138)
Liaoning Province International Science and Technology Cooperation Program(2024JH2/102100004)。
