Abstract
Au–Ag bimetallic catalysts on SiO2 were prepared using a simultaneous solid grinding (simul-SG) method, in which multiple kinds of organometallic complexes are ground with a support powder. After optimizing the Ag/Au ratio, the obtained catalysts exhibited remarkably high activity for low-temperature CO oxidation compared with that of Au/SiO2 or Ag/SiO2 catalysts. A detailed structural analysis using electron microscopy revealed that a higher ratio of Ag prevents growth of the particles via sintering and induces high densities of active Au–Ag contacts. Our simul-SG method is a promising tool for the easy preparation of multicomponent catalysts on various supports.
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Acknowledgments
This work was supported by JSPS KAKENHI, Grant Number 26286054. We are grateful to Dr. Yamazaki for his support with the UV–vis measurements. We would like to thank Editage (http://www.editage.jp) for English language editing.
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Maeda, Y., Taguchi, N., Akita, T. et al. A Simultaneous Solid Grinding Method for the Preparation of Gold Catalysts. Catal Lett 146, 2376–2380 (2016). https://doi.org/10.1007/s10562-016-1870-y
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DOI: https://doi.org/10.1007/s10562-016-1870-y