%0 Journal Article
%A Jia, Henglei
%A Du, Aoxuan
%A Zhang, Han
%A Yang, Jianhua
%A Jiang, Ruibin
%A Wang, Jianfang
%A Zhang, Chun-yang
%D 2019
%T Site-Selective
Growth of Crystalline Ceria with Oxygen
Vacancies on Gold Nanocrystals for Near-Infrared Nitrogen Photofixation
%U https://acs.figshare.com/articles/journal_contribution/Site-Selective_Growth_of_Crystalline_Ceria_with_Oxygen_Vacancies_on_Gold_Nanocrystals_for_Near-Infrared_Nitrogen_Photofixation/7887719
%R 10.1021/jacs.8b13062.s001
%2 https://acs.figshare.com/ndownloader/files/14690663
%K bifunctional K 2 PtCl 4
%K NIR
%K OV
%K N 2 molecules
%K NR
%K K 2 PtCl 4
%K surface
%K gold nanocrystals
%K Near-Infrared Nitrogen Photofixation Site-selective growth
%K ceria
%X Site-selective
growth of crystalline semiconductors on gold nanocrystals
remains a great challenge because of the difficult control of both
nucleation and growth dynamics as well as the easy agglomeration and
deformation of gold nanocrystals at high temperatures of 400–1000
°C. Here we report a facile wet-chemistry route for the selective
growth of crystalline ceria at the ends of gold nanorods (Au NRs)
in the presence of a small amount of bifunctional K2PtCl4. Due to the smaller steric hindrance at the ends than at
the side surface, K2PtCl4 may preferentially
adsorb at the ends of Au NRs, triggering the autoredox reaction with
the ceria precursor to obtain crystalline CeO2 at the ends.
Notably, the surface of grown ceria is rich in oxygen vacancies (OVs)
that facilitate the adsorption and activation of N2 molecules.
The unique structure, the plasmon-induced hot carriers and the OVs
make the obtained Au/end-CeO2 an excellent catalyst for
nitrogen photofixation under near-infrared (NIR) illumination.
%I ACS Publications