Supported Au nanocatalysts have been regarded as efficient catalysts.However,their poor thermal stability has hindered their extensive application.Herein,Au-TiO_(2)nanoparticles(NP_(s))with outstanding thermal stabili...Supported Au nanocatalysts have been regarded as efficient catalysts.However,their poor thermal stability has hindered their extensive application.Herein,Au-TiO_(2)nanoparticles(NP_(s))with outstanding thermal stability were prepared by a novel carbon nitride(C_(3)N_(4))-mediated synthetic strategy.The C_(3)N_(4)layer on TiO_(2)functioned as a sacrificial agent and mediated the engineering of a strong metal–support interaction(SMSI)between the TiO_(2)support and Au NPs.A SMSI is successfully formed after the removal of the C_(3)N_(4)sacrificial agent.The formation of a SMSI was found to rely on the thin coating layer of TiO_(2)around Au NPs and the electron transfer effect.The SMSI provides the Au NP_(s)with a boosted oxygen activation performance and enhanced the catalytic performance of aerobic oxidative desulfurization under mild conditions.Moreover,the SMSI induces a promoted thermal stability and good sintering resistance during the oxidative desulfurization process.This work could provide a simple strategy to enhance the thermal stability of noble metal NP_(s).展开更多
基金supported by the National Natural Science Foundation of China(no.21576122,21722604,21808092)the China Postdoctoral Science Foundation(no.2019M651743)+2 种基金the Natural Science Foundation of Jiangsu Province(BK20190852,BK20190854)the Natural Science Research of Jiangsu Higher Education Institutions of China(19KJB530005)the Postgraduate Research&Practice Innovation Program of Jiangsu Province(SJKY19_2575).
文摘Supported Au nanocatalysts have been regarded as efficient catalysts.However,their poor thermal stability has hindered their extensive application.Herein,Au-TiO_(2)nanoparticles(NP_(s))with outstanding thermal stability were prepared by a novel carbon nitride(C_(3)N_(4))-mediated synthetic strategy.The C_(3)N_(4)layer on TiO_(2)functioned as a sacrificial agent and mediated the engineering of a strong metal–support interaction(SMSI)between the TiO_(2)support and Au NPs.A SMSI is successfully formed after the removal of the C_(3)N_(4)sacrificial agent.The formation of a SMSI was found to rely on the thin coating layer of TiO_(2)around Au NPs and the electron transfer effect.The SMSI provides the Au NP_(s)with a boosted oxygen activation performance and enhanced the catalytic performance of aerobic oxidative desulfurization under mild conditions.Moreover,the SMSI induces a promoted thermal stability and good sintering resistance during the oxidative desulfurization process.This work could provide a simple strategy to enhance the thermal stability of noble metal NP_(s).
