Reduction of NO by CO on unsupported Ir: bridging the materials gap

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
Wenhua ChenTimo Jacob

Abstract

Temperature programmed desorption (TPD) and density functional theory (DFT) are used to investigate adsorption sites and reaction of coadsorbed NO and CO on planar Ir(210) and faceted Ir(210) with tailored sizes of three-sided nanopyramids exposing (311), (31 1) and (110) faces. Both planar and faceted Ir(210) are highly active for reduction of NO by CO with high selectivity to N(2), which is accompanied by simultaneous oxidation of CO. Evidence is found for structure sensitivity in adsorption sites and reaction of coadsorbed NO and CO on faceted Ir(210) versus planar Ir(210). Strong interaction between NO and CO at high NO exposure and one-monolayer CO pre-coverage results in "explosive" evolution of N(2) and CO(2) on planar Ir(210) and size effects in reduction of NO by CO on faceted Ir(210) for average facet size ranging from 5 to 14 nm without change in facet structure.

References

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Citations

Jun 27, 2013·Physical Chemistry Chemical Physics : PCCP·Payam KaghazchiRobert A Bartynski
Jan 21, 2014·The Journal of Chemical Physics·Hao WangTimo Jacob
Sep 7, 2013·The Journal of Chemical Physics·Quantong ShenRobert A Bartynski
Dec 2, 2011·The Journal of Chemical Physics·Chao-zheng HeJing-yao Liu
Jan 16, 2020·Environmental Science and Pollution Research International·Zhicheng XuTingyu Zhu
Jan 1, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Wenhua ChenTimo Jacob

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