Premium
Activity Enhancement upon the Incorporation of Titanium: Au@Ti–SiO 2 Core–Shell Nanocatalysts for the CO Oxidation Reaction
Author(s) -
Sunil Sekhar Anandakumari C.,
Ziyad Kottavarithottil,
Soni Yogita,
Vinod Chathakudath P.
Publication year - 2015
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201402954
Subject(s) - nanomaterial based catalyst , catalysis , titanium , materials science , porosity , chemical engineering , shell (structure) , nanoparticle , morphology (biology) , nanotechnology , metallurgy , chemistry , composite material , organic chemistry , biology , engineering , genetics
The encapsulation of gold nanoparticles 8–12 nm in size within a porous Ti–SiO 2 shell to form a core–shell nanoarchitecture was investigated, and the catalytic activity of the resulting structure was probed. Detailed characterization of the synthesized materials shows that the core–shell morphology is lost beyond a certain amount of incorporated titanium, and results in normal gold‐supported Ti–SiO 2 . The material has a high surface area (913 m 2 g −1 ) and high porosity, both of which make it an excellent choice for catalytic applications. With the optimum amount of incorporated Ti, the core–shell catalyst shows excellent room‐temperature CO oxidation activity over several cycles with retention of its morphology at higher temperatures.