SrMnO3 is a potential solid oxide fuel cell (SOFC) cathode material. However, the formation of different crystalline phases and poor sinterability restrict its application as in SOFC. Thus, present study focused on synthesis monophasic using sintering temperatures with variable durations. The X-ray diffraction confirms gradual transformation hexagonal to orthorhombic SrMnO3. Minor amounts Hausm...

Abstract Microbial anaerobic oxidation of methane coupled to the reduction Mn(IV)-oxides, typically MnO 2 , derived from continental weathering and riverine transport has been proposed as a globally important sink methane. However, potential role hydrothermal Mn(IV) oxide-rich sediments sink, mechanisms underpinning at high-temperature fields remain poorly understood. Here, we report occurrence...

In this study, porous manganese oxide (MnOx) thin films were synthesized via electrostatic spray deposition (ESD) and evaluated as pseudocapacitive electrode materials in neutral aqueous media. Very interestingly, the gravimetric specific capacitance of the ESD-based electrodes underwent a marked enhancement upon electrochemical cycling, from 72 F∙g-1 to 225 F∙g-1, with a concomitant improvemen...

Ahstract--Mn-substituted iron oxides were synthesized by coprecipitating Fe(NO3)3 and Mn(SO4) solutions with NH4OH, adjusting the suspensions to pH 4 or 6, and then keeping the suspensions at 55~ for 62 days. The Mn mole fraction of the final products ranged from 0 to 0.3. X-ray powder diffraction patterns showed that goethite and hematite formed in each Fe-containing system. Groutite formed in...

Jarosewichite, Mn3+Mn3+(AsOn)(OH)0, is a new mineral, closely related to chlorophoenicite, from the Franklin mine, Franklin, Sussex County, New Jersey, where it occurs associated with andradite, franklinite, flinkite, cahnite and hausmannite. Jarosewichite is orthorhombic, space grotp C2lmLlm2lm, C222 or Cmm2, with a : 6.56(3), b : 25.20(10), c : 10.00(5)4, and Z : 8. The strongest lines in the...