Phase cooperation of V2O5 and Bi2O3 in the selective oxidation of H2S containing ammonia and water

Potentiometric CO sensors using anion-conducting polymer electrolyte: Effects of the kinds of noble metal-loaded metal oxides as sensing-electrode materials on CO-sensing properties

“…On the other hand, the EC(Bi2O3) sensor showed the largest CO and H2 responses among all the EC(MO) sensors. The Bi2O3, which has some oxygen vacancies in the lattice [35], has been applied as a component of various oxidation catalysts to organic molecules [36], CO [37], and H2S [38]. We also have reported that the Bi2O3 addition into Pt electrode largely enhanced the CO-sensing properties of NASICON-based solid electrolyte gas sensors at RT [39].…”

Advances in Resources Recovery of H2S: A Review of Desulfurization Processes and Catalysts

“…Metal oxide composites such as Nb 2 O 5 /Fe 2 O 3 , Co 3 O 4 /SiO 2 , Fe 2 O 3 /SiO 2 , V 2 O 5 /SiO 2 , and V 2 O 5 /Bi 2 O 3 are effective for this reaction . Park et al reported a 10%V 2 O 5 /SiO 2 catalyst for the reaction of H 2 S with NH 3 at 260 °C (GHSV = 60,000 h –1 and H 2 S/O 2 /NH 3 /H 2 O = 5%/2.5%/10%/60%) .…”

Production of ammonium thiosulfate by the oxidation of hydrogen sulfide over Nb-Fe mixed oxide catalysts

“…As will be discussed later, this SO 2 production comes from the oxidation of H 2 S with excess oxygen (H 2 S + (3/2)O 2 → SO 2 + H 2 O) or from the oxidation of sulfur with oxygen (S + O 2 → SO 2 ). In our previous work on the selective oxidation of H 2 S over V 2 O 5 [16], we reported that an oxidized form of vanadium having very active surface oxygen produced only SO 2 . When V 2 O 5 was reduced to a suboxide after the reaction with H 2 S, the production of SO 2 decreased and only sulfur was produced when labile oxygen in vanadium was depleted by the treatment with pure hydrogen sulfide.…”