Pan, Ming Ham, Hyung Chul Yu, Wen-Yueh Hwang, Gyeong S. Mullins, C. Buddie 2024-01-20T13:03:44Z 2024-01-20T13:03:44Z 2021-08-31 2013-01-09 0002-7863 https://pubs.kist.re.kr/handle/201004/128458 We have discovered that NO2 is reduced to NO at 77 K by hydrogen precovered gold in vacuum. Here, we investigate the partial reduction of NO2 to NO on an atomic-hydrogen populated model gold catalyst for a more fundamental understanding of the surface chemistry of hydrogenation. Gold-based catalysts have been found to be active for many hydrogenation reactions, but few related fundamental studies have been conducted. Our experimental results reveal a high catalytic activity for gold: indeed, NO2 is reduced to NO with 100% conversion and 100% selectivity at temperatures lower than 120 K. Density functional theory calculations and reflection-absorption infrared spectroscopy measurements indicate that HNO2 and N2O3 are intermediates which are highly dependent on surface hydrogen concentrations; subsequent hydrogenation of HNO2 and dissociation of N2O3 upon annealing induces the production of NO and H2O. English AMER CHEMICAL SOC CO OXIDATION SUPPORTED GOLD ATOMIC-HYDROGEN NITRIC-OXIDE WATER ADSORPTION OXYGEN AU CATALYSTS AU(111) Highly Selective, Facile NO2 Reduction to NO at Cryogenic Temperatures on Hydrogen Precovered Gold Article 10.1021/ja3096575 1 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.135, no.1, pp.436 - 442 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 135 1 436 442 scie scopus 000313143000066 2-s2.0-84872121398 Chemistry, Multidisciplinary Chemistry Article CO OXIDATION SUPPORTED GOLD ATOMIC-HYDROGEN NITRIC-OXIDE WATER ADSORPTION OXYGEN AU CATALYSTS AU(111) NO2 NO Reduction Au