Comprehensive Summary Designing new materials and architectures to maintain activity and stability requires a better understanding on the anticorrosion dynamics of nanoparticles.Under-coordinated atoms on the surface ...Comprehensive Summary Designing new materials and architectures to maintain activity and stability requires a better understanding on the anticorrosion dynamics of nanoparticles.Under-coordinated atoms on the surface of nanoparticles can be protected by deposited shells.Real-time observation on how protective shells grow and play a role is challenging but worthwhile.Here,protective effects of AuCl_(3) shells on Au nanobipyramids(NBPs)are studied in HAuCl_(4) aqueous solutions by in-situ liquid cell transmission electron microscopy(LCTEM).This study is the first to observe the formation of Au-AuCl_(3) core-shell nanostructure and the corresponding anticorrosion behaviors of AuCl_(3) deposited shell.The presence of CTAB can substantially influence the growth mode and structure of AuCl_(3) shell,by a direct or indirect way,intervene the dissolution of Au NBP.These growth or dissolution kinetics here revealed at the nanoscale provide insights towards engineering of the surface anticorrosion to pursue Au nanoparticles with improved stability in acidic environment.展开更多
基金support from the National Natural Science Foundation of China(51801024)Natural Science Foundation of the Jiangsu Higher Education Institutions of China(22KJD510006,22KJB110012)Jiangsu Open University“14th Five-Year”2023 Annual Scientific Research Planning Project(2023XK004).
文摘Comprehensive Summary Designing new materials and architectures to maintain activity and stability requires a better understanding on the anticorrosion dynamics of nanoparticles.Under-coordinated atoms on the surface of nanoparticles can be protected by deposited shells.Real-time observation on how protective shells grow and play a role is challenging but worthwhile.Here,protective effects of AuCl_(3) shells on Au nanobipyramids(NBPs)are studied in HAuCl_(4) aqueous solutions by in-situ liquid cell transmission electron microscopy(LCTEM).This study is the first to observe the formation of Au-AuCl_(3) core-shell nanostructure and the corresponding anticorrosion behaviors of AuCl_(3) deposited shell.The presence of CTAB can substantially influence the growth mode and structure of AuCl_(3) shell,by a direct or indirect way,intervene the dissolution of Au NBP.These growth or dissolution kinetics here revealed at the nanoscale provide insights towards engineering of the surface anticorrosion to pursue Au nanoparticles with improved stability in acidic environment.
