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Catalysis on singly dispersed bimetallic sites
Zhang, Shiran ; Nguyen, Luan ; Liang, Jin-Xia ; Shan, Junjun ; Liu, Jingyue ; Frenkel, Anatoly I. ; Patlolla, Anitha ; Huang, Weixin ; Li, Jun ; Tao, Franklin Feng
Zhang, Shiran
Nguyen, Luan
Liang, Jin-Xia
Shan, Junjun
Liu, Jingyue
Frenkel, Anatoly I.
Patlolla, Anitha
Huang, Weixin
Li, Jun
Tao, Franklin Feng
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Abstract
A catalytic site typically consists of one or more atoms of a catalyst surface that arrange into a configuration offering a specific electronic structure for adsorbing or dissociating reactant molecules. The catalytic activity of adjacent bimetallic sites of metallic nanoparticles has been studied previously. An isolated bimetallic site supported on a non-metallic surface could exhibit a distinctly different catalytic performance owing to the cationic state of the singly dispersed bimetallic site and the minimized choices of binding configurations of a reactant molecule compared with continuously packed bimetallic sites. Here we report that isolated Rh1Co3 bimetallic sites exhibit a distinctly different catalytic performance in reduction of nitric oxide with carbon monoxide at low temperature, resulting from strong adsorption of two nitric oxide molecules and a nitrous oxide intermediate on Rh1Co3 sites and following a low-barrier pathway dissociation to dinitrogen and an oxygen atom. This observation suggests a method to develop catalysts with high selectivity.
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Date
2015-08-21
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Publisher
Nature Publishing Group
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Keywords
Catalyst Synthesis, Nanoparticles, Physical Chemistry
Citation
Zhang, S., Nguyen, L., Liang, J., Shan, J., Liu, J., Frenkel, A. I., . . . Tao, F. (2015). Catalysis on singly dispersed bimetallic sites. Nature Communications, 6, 7938. doi:10.1038/ncomms8938