Sintering resistant noble metal nanoparticles are critical to the development of advanced catalysts with high activity and stability.Herein,we reported the construction of highly dispersed Pd nanoparticles loaded at t...Sintering resistant noble metal nanoparticles are critical to the development of advanced catalysts with high activity and stability.Herein,we reported the construction of highly dispersed Pd nanoparticles loaded at the inner wall of ZrO_(2)hollow spheres(Pd@HS-ZrO_(2)),which shows improved activity and thermal stability over references in the Pd-ZrO_(2)(catalyst-support)system.Even after 800℃ high temperature calcination,the Pd nanoparticles and ZrO_(2)hollow spheres did not undergo morphological changes.The Pd@HS-ZrO_(2)manifests batter catalytic activity and thermal stability than the counterpart Pd/ZrO_(2)catalysts.In comparison to Pd/ZrO_(2)-800,Pd@ZrO_(2)-800 exhibits a 25℃ reduction in the temperature required for complete conversion of CO.The enhanced catalytic activity and thermal stability of Pd@HS-ZrO_(2)can be attributed to the nanoconfinement effect offered by the 10 nm wall thickness of the ZrO_(2)hollow spheres,which suppresses the coarsening of the Pd nanoparticles(active center for catalysis).展开更多
基金The authors would like to thank the financial support from the National Natural Science Foundation of China(Grant Nos.52173257,52162028,and 51962015)
文摘Sintering resistant noble metal nanoparticles are critical to the development of advanced catalysts with high activity and stability.Herein,we reported the construction of highly dispersed Pd nanoparticles loaded at the inner wall of ZrO_(2)hollow spheres(Pd@HS-ZrO_(2)),which shows improved activity and thermal stability over references in the Pd-ZrO_(2)(catalyst-support)system.Even after 800℃ high temperature calcination,the Pd nanoparticles and ZrO_(2)hollow spheres did not undergo morphological changes.The Pd@HS-ZrO_(2)manifests batter catalytic activity and thermal stability than the counterpart Pd/ZrO_(2)catalysts.In comparison to Pd/ZrO_(2)-800,Pd@ZrO_(2)-800 exhibits a 25℃ reduction in the temperature required for complete conversion of CO.The enhanced catalytic activity and thermal stability of Pd@HS-ZrO_(2)can be attributed to the nanoconfinement effect offered by the 10 nm wall thickness of the ZrO_(2)hollow spheres,which suppresses the coarsening of the Pd nanoparticles(active center for catalysis).
