title: Catalysis on singly dispersed bimetallic sites.
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.
authors: Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66047, USA.|Department of Chemistry, University of Kansas, Lawrence, Kansas 66047, USA.
authors: Shiran
authors: S
authors: Zhang
authors: Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66047, USA.|Department of Chemistry, University of Kansas, Lawrence, Kansas 66047, USA.
authors: Luan
authors: L
authors: Nguyen
authors: Department of Chemistry and Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China.|Guizhou Provincial Key Laboratory of Computational Nano-Material Science, Guizhou Normal College, Guiyang 550018, China.
authors: Jin-Xia
authors: JX
authors: Liang
authors: Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66047, USA.|Department of Chemistry, University of Kansas, Lawrence, Kansas 66047, USA.
authors: Junjun
authors: J
authors: Shan
authors: Department of Physics, Arizona State University, Tempe, Arizona 85287, USA.
authors: Jingyue Jimmy
authors: JJ
authors: Liu
authors: Department of Physics, Yeshiva University, New York, New York 10016, USA.
authors: Anatoly I
authors: AI
authors: Frenkel
authors: Department of Physics, Yeshiva University, New York, New York 10016, USA.
authors: Anitha
authors: A
authors: Patlolla
authors: Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66047, USA.|Department of Chemistry, University of Kansas, Lawrence, Kansas 66047, USA.
authors: Weixin
authors: W
authors: Huang
authors: Department of Chemistry and Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China.
authors: Jun
authors: J
authors: Li
authors: Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66047, USA.|Department of Chemistry, University of Kansas, Lawrence, Kansas 66047, USA.
authors: Franklin Feng
authors: FF
authors: Tao