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Gold Nanoparticles Embedded within Mesoporous Cobalt Oxide Enhance Electrochemical Oxygen Evolution
Author(s) -
Lu Xunyu,
Ng Yun Hau,
Zhao Chuan
Publication year - 2014
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201300975
Subject(s) - cobalt , catalysis , mesoporous material , cobalt oxide , nanoparticle , materials science , electrochemistry , chemical engineering , oxide , oxygen evolution , porosity , mesoporous silica , metal , colloidal gold , inorganic chemistry , nanotechnology , chemistry , electrode , metallurgy , organic chemistry , composite material , engineering
Gold nanoparticles incorporated in mesoporous cobalt oxides (Au/mCo 3 O 4 ) are fabricated by a nanocasting method using porous silica as the hard template. The Au/mCo 3 O 4 material exhibits enhanced catalytic activity towards water oxidation compared to bulk mCo 3 O 4 in both alkaline and neutral solutions. The superior catalytic performance is ascribed to the synergistic effect of electronegative metal gold, which facilitates the generation of active Co IV sites, as well as the large specific surface area and the preferential exposure of catalytic active crystalline lattice.