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Photocatalytic Reduction of Carbon Dioxide by Hydrous Hydrazine over Au–Cu Alloy Nanoparticles Supported on SrTiO 3 /TiO 2 Coaxial Nanotube Arrays
Author(s) -
Kang Qing,
Wang Tao,
Li Peng,
Liu Lequan,
Chang Kun,
Li Mu,
Ye Jinhua
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201409183
Subject(s) - bimetallic strip , photocatalysis , materials science , catalysis , nanoparticle , alloy , hydrazine (antidepressant) , chemical engineering , coaxial , reducing agent , nanotechnology , inorganic chemistry , chemistry , composite material , organic chemistry , electrical engineering , chromatography , engineering
Efficient photocatalytic conversion of CO 2 into CO and hydrocarbons by hydrous hydrazine (N 2 H 4 ⋅H 2 O) is achieved on SrTiO 3 /TiO 2 coaxial nanotube arrays loaded with Au–Cu bimetallic alloy nanoparticles. The synergetic catalytic effect by the Au–Cu alloy nanoparticles and the fast electron‐transfer in SrTiO 3 /TiO 2 coaxial nanoarchitecture are the main reasons for the efficiency, while N 2 H 4 ⋅H 2 O as the H source and electron donor provides a reducing atmosphere to protect the surface Cu atoms from oxidation, therefore maintaining the alloying effect which is the basis for the high photocatalytic activity and stability. This approach opens a feasible route to enhance the photocatalytic efficiency, which also benefits the development of photocatalysts and co‐catalysts.