Site-Selective Surface Reactions: Nitric Oxide Reduction on Mo(110)

High-Temperature Degradation of Hastelloy C276 in Methane and 99% Cracked Ammonia Combustion: Surface Analysis and Mechanical Property Evolution at 4 Bar

“…The primary mechanism involves the formation of molybdenum trioxide (MoO 3 ), which has significant vapour pressure at the exposure temperatures (815-860 • C) and readily volatilizes from the surface [13,60,62]. The elevated NOx concentrations (151.3 ppm) may also contribute to molybdenum oxidation through reactions such as Mo + 3NO 2 → MoO 3 + 1.5N 2 O, providing additional pathways for molybdenum oxide formation [113][114][115]. The extensive molybdenum depletion with only small retention spots directly explains the bright spots observed in the backscattered electron images of the 99% sample.…”

High-Temperature Degradation of Hastelloy C276 in Methane and 99% Cracked Ammonia Combustion: Surface Analysis and Mechanical Property Evolution at 4 Bar

“…The primary mechanism involves the formation of molybdenum trioxide (MoO 3 ), which has significant vapour pressure at the exposure temperatures (815-860 • C) and readily volatilizes from the surface [13,60,62]. The elevated NOx concentrations (151.3 ppm) may also contribute to molybdenum oxidation through reactions such as Mo + 3NO 2 → MoO 3 + 1.5N 2 O, providing additional pathways for molybdenum oxide formation [113][114][115]. The extensive molybdenum depletion with only small retention spots directly explains the bright spots observed in the backscattered electron images of the 99% sample.…”

High-Temperature Degradation of Hastelloy C276 in Methane and 99% Cracked Ammonia Combustion: Surface Analysis and Mechanical Property Evolution at 4 Bar

“…The primary mechanism involves the formation of molybdenum trioxide (MoO 3 ), which has significant vapour pressure at the exposure temperatures (815-860 • C) and readily volatilizes from the surface [13,60,62]. The elevated NOx concentrations (151.3 ppm) may also contribute to molybdenum oxidation through reactions such as Mo + 3NO 2 → MoO 3 + 1.5N 2 O, providing additional pathways for molybdenum oxide formation [113][114][115]. The extensive molybdenum depletion with only small retention spots directly explains the bright spots observed in the backscattered electron images of the 99% sample.…”

High-Temperature Degradation of Hastelloy C276 in Methane and 99% Cracked Ammonia Combustion: Surface Analysis and Mechanical Property Evolution at 4 Bar

“…The primary mechanism involves the formation of molybdenum trioxide (MoO 3 ), which has significant vapour pressure at the exposure temperatures (815-860 • C) and readily volatilizes from the surface [13,60,62]. The elevated NOx concentrations (151.3 ppm) may also contribute to molybdenum oxidation through reactions such as Mo + 3NO 2 → MoO 3 + 1.5N 2 O, providing additional pathways for molybdenum oxide formation [113][114][115]. The extensive molybdenum depletion with only small retention spots directly explains the bright spots observed in the backscattered electron images of the 99% sample.…”