Catalysis on singly dispersed bimetallic sites

Shiran Zhang, Luan Nguyen, Jin-Xia Liang, Junjun Shan, Jingyue Liu, Anatoly I. Frenkel, Anitha Patlolla, Weixin Huang, Jun Li () and Franklin Tao ()
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Shiran Zhang: University of Kansas
Luan Nguyen: University of Kansas
Jin-Xia Liang: Tsinghua University
Junjun Shan: University of Kansas
Jingyue Liu: Arizona State University
Anatoly I. Frenkel: Yeshiva University
Anitha Patlolla: Yeshiva University
Weixin Huang: University of Kansas
Jun Li: Tsinghua University
Franklin Tao: University of Kansas

Nature Communications, 2015, vol. 6, issue 1, 1-10

Abstract: 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.

Date: 2015
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DOI: 10.1038/ncomms8938

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