Characterization of bismuth-manganese oxide catalysts for methane oxidative coupling

Structure, thermoelectric and electrical properties of bismuth-manganese oxide prepared by mechanochemical method

“…As expected, the orthorhombic phase decreases with increasing milling time at the same heat treatment temperature. It is concluded that, Bi2Mn4O10 decomposes to α-Bi2O3 and α-Mn2O3[4]. Also, BiMn2O5 has a structure, which contains octahedrally coordinated Mn 4+ ions and Mn 3+ ions located in square pyramids[23].In the present work, the decomposition clearly observed with 50h milled sample where cubic system with space group I23 (No.…”

“…Also, bismuth manganese oxide like Bi2Mn4O10 can be used as catalysts for methane. The results showed that samples containing small amount of bismuth oxide with bismuth manganese oxide enhance catalytic activity [4]. Single-phase of BiMnO3 was prepared in high energetic ball mill by mechanochemical synthesis method from Bi2O3 and Mn2O3 powder [5].…”

Remote Control of Catalytic Sites by Spillover Species: A Chemical Reaction Engineering Approach∗

“…More recently, RC was shown to operate in the oxidation of butane to MAA (Ruiz et al, 1993), the oxidative dehydrogenation of butene (Qiu et al, 1989a(Qiu et al, , 1989b, and, probably, the oxygen-aided dehydration of alcohols. Serious candidates for effective remote control are methanol synthesis, where the role of spillover hydrogen is investigated (Burch et al, 1990), other reactions with synthesis gas (ethanol formation: Ehwald et al, 1991), and the oxidative coupling of methane (Baidikova et al, 1992), where a synergy between phases has been demonstrated but a remote control has not been definitely proven yet.…”

Significant Promotion Effect of Bi2O3on the Activity and Stability of Directly Assembled Lanthanum Manganite Based Cathodes of Solid Oxide Fuel Cells

“…This again confirms the interaction between LSMPt and YSB during the cathodic polarization. Mn-Bi-O tertiary oxides such as Bi 2 Mn 4 O 10 and BiMnO 3 have been reported [63][64][65] and Bi 2 Mn 4 O 10 shows an excellent catalytic activity for methane oxidative coupling and oxidation reaction of ammonia. 63,64 The exact mechanism of the interface or the contact pit formation is not clear at the present stage.…”

“…Mn-Bi-O tertiary oxides such as Bi 2 Mn 4 O 10 and BiMnO 3 have been reported [63][64][65] and Bi 2 Mn 4 O 10 shows an excellent catalytic activity for methane oxidative coupling and oxidation reaction of ammonia. 63,64 The exact mechanism of the interface or the contact pit formation is not clear at the present stage. The observation of pits on the YSZ surface indicates the in situ formation of electrode/electrolyte interface under the influence of polarization, and the formation of Mn-Bi containing particles or phase at interface would facilitate the rapid migration of oxygen ions from the electrode to the electrolyte, indicated by the significantly reduced R p for the ORR on LSMPt-YSB composite electrode (Fig.…”