Double perovskite oxides Sr2MMoO6 (M=Fe and Co) as cathode materials for oxygen reduction in alkaline medium

Cheriti, Mabrouk; Kahoul, A.

doi:10.1016/j.materresbull.2011.09.016

Cited by 41 publications

(29 citation statements)

References 31 publications

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“…8 shows that all the impedance plots are almost similar in form with an arc in the high frequency range and a straight line in the low frequency range, corresponding to charge transfer and diffusion processes of oxygen at the electrode/electrolyte interface [36], respectively. L is the equivalent inductance, C 1 is the limit capacitance, and R 1 is a combinational resistance of ionic resistance of electrolyte, intrinsic resistance of substrate, and contact resistance at the active material/current collector interface [39].…”

Section: Electrocatalytic Activitymentioning

confidence: 78%

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Oxygen reduction reaction activity of LaMn1-xCoxO3-graphene nanocomposite for zinc-air battery

Wang

Shi

et al. 2015

Electrochimica Acta

120

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Section: Electrocatalytic Activitymentioning

confidence: 78%

“…What is more, the LaMn 0.9 Co 0.1 O 3 -graphene showed a shift (30 mV) of the half wave potential to a positive voltage compared to LaMnO 3 -graphene. Half-wave potential is commonly used as an indicator of surface reaction activity, which is associated with the catalytic properties of ORR [36]. LaMn 1-…”

Section: Electrocatalytic Activitymentioning

confidence: 99%

Oxygen reduction reaction activity of LaMn1-xCoxO3-graphene nanocomposite for zinc-air battery

Wang

Shi

et al. 2015

Electrochimica Acta

120

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“…357 Mixed valence oxides of transition metals with a spinel structure are regarded as an important class of metal oxides. 369 Furthermore, previous studies on perovskites having the B site fully occupied by Co cations have reported a 4-electron process for ORR. 358,359 Dai et al developed a MnCo 2 O 4 -N-doped graphene hybrid material as a highly efficient ORR electrocatalyst in alkaline conditions.…”

Section: View Article Onlinementioning

confidence: 99%

Recent advancements in Pt and Pt-free catalysts for oxygen reduction reaction

2015

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Developing highly efficient catalysts for the oxygen reduction reaction (ORR) is key to the fabrication of commercially viable fuel cell devices and metal-air batteries for future energy applications. Herein, we review the most recent advances in the development of Pt-based and Pt-free materials in the field of fuel cell ORR catalysis. This review covers catalyst material selection, design, synthesis, and characterization, as well as the theoretical understanding of the catalysis process and mechanisms. The integration of these catalysts into fuel cell operations and the resulting performance/durability are also discussed. Finally, we provide insights into the remaining challenges and directions for future perspectives and research.

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“…Cobalt‐based catalysts are not broadly considered as highly active for O 2 reduction; however, PM La 0.5 Sr 0.5 CoO 2.91 perovskite is a high‐performance catalyst for ORR, and actually shares many of the orbital physics of La 0.4 Sr 0.6 MnO 3 or LaMnO 3+δ . We consider based on our analysis that the oxygen‐deficient Sr 2 CoMoO 6−δ (SCMO) composition is an entropically capable catalyst . SCMO has FM domains characterised by a T C up to 370 K, and we believe the comparison between LSMO and SCMO is pertinent.…”

Section: Resultsmentioning

confidence: 99%

Analysis of the Magnetic Entropy in Oxygen Reduction Reactions Catalysed by Manganite Perovskites

Gracia¹,

Munárriz

Polo

et al. 2017

ChemCatChem

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Manganese oxides with a half‐metallic ground state are particularly active for oxygen reduction reactions (ORR). La0.67Sr0.33MnO3 (LSMO) perovskite is the archetypal example for compositions with a Curie temperature (TC) above room temperature and with a high intrinsic activity for the partial reduction of triplet‐state O2. The ferromagnetic (FM) character of the superexchange interactions in LSMO facilitates both charge and spin transport below 370 K. Other than the enhanced electronic conductivity, the reduced spin entropy seems to be relevant in oxygen catalysis because the magnetic ordering extends to the surface. The sign of the exchange interactions determines the adsorption of the triplet oxygen molecule with its spin antiparallel to the FM catalysts. Based on the transition‐state theory, we report that on LSMO, the hindrance resulting from the magnetic entropy for the initial reduction of O2 by two antiparallel electrons to diamagnetic intermediates (such H2O2) is minimum. On the other hand, the additional reduction of H2O2 to H2O, diamagnetic steps, prefers paramagnetic catalysts with higher magnetic entropy such as La0.4Sr0.6MnO3 to avoid spin accumulation.

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Double perovskite oxides Sr2MMoO6 (M=Fe and Co) as cathode materials for oxygen reduction in alkaline medium

Cited by 41 publications

References 31 publications

Oxygen reduction reaction activity of LaMn1-xCoxO3-graphene nanocomposite for zinc-air battery

Oxygen reduction reaction activity of LaMn1-xCoxO3-graphene nanocomposite for zinc-air battery

Recent advancements in Pt and Pt-free catalysts for oxygen reduction reaction

Analysis of the Magnetic Entropy in Oxygen Reduction Reactions Catalysed by Manganite Perovskites

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