@article{Wu2009, 
author = {Binghui Wu and Hai Zhang and Cheng Chen and Shuichao Lin and Nanfeng Zheng},
title = {Interfacial Activation of Catalytically Inert Au (6.7 nm)-Fe3O4 Dumbbell Nanoparticles for CO Oxidation},
year = {2009},
journal = {Nano Research},
volume = {2},
number = {12},
pages = {975-983},
keywords = {Gold nanocatalysts, support effect, CO oxidation, Au-Fe3O4, dumbbell nanoparticles},
url = {https://www.sciopen.com/article/10.1007/s12274-009-9102-z},
doi = {10.1007/s12274-009-9102-z},
abstract = {Au nanoparticles epitaxially grown on Fe3O4 in Au (6.7 nm)-Fe3O4 dumbbell nanoparticles exhibit excellent stability against sintering, but display negligible catalytic activity in CO oxidation. Starting from various supported Au (6.7 nm)-Fe3O4 catalysts prepared by the colloidal deposition method, we have unambiguously identified the significance of the Au-TiO2 interface in CO oxidation, without any possible size effect of Au. In situ thermal decomposition of TiO2 precursors on Au-Fe3O4 was found to be an effective way to increase the Au-TiO2 interface and thereby optimize the catalytic performance of TiO2-supported Au-Fe3O4 dumbbell nanoparticles. By reducing the size of Fe3O4 from 15.2 to 4.9 nm, the Au-TiO2 contact was further increased so that the resulting TiO2-supported Au (6.7 nm)-Fe3O4 (4.9 nm) dumbbell particles become highly efficient catalysts for CO oxidation at room temperature.}
}