Magnetic properties of (1 − x)Bi0.5Na0.5TiO3 + xSrCoO3 − δ solid-solution materials

Dũng, Đặng Đức

doi:10.1007/s00339-020-3409-8

Cited by 18 publications

(1 citation statement)

References 38 publications

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“…Figure S1 depicts the X-ray diffraction (XRD) patterns of the synthesized materials, Ca 0.8 Sr 0.2 CoO 3−δ (CSCo), Ca 0.8 Sr 0.2 CuO 3−δ (CSCu), and Ca 0.8 Sr 0.2 Co 0.5 Cu 0.5 O 3−δ (CSCoCu), confirming their perovskite structure. The XRD pattern shows peaks at 2θ of 23.0, 31.5, 39.5, 46.5, and 57.0°, which are related to the pure crystalline structure of CSCo (space group: Pm 3̅ m ), which is in good agreement with a previous report . The Rietveld refinement indicated the presence of single-phase perovskite for CSCo.…”

Section: Resultssupporting

confidence: 90%

Cobalt-/Copper-Containing Perovskites in Oxygen Evolution and Reduction Reactions

Tabari,

Kobielusz,

Singh

et al. 2023

ACS Appl. Eng. Mater.

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The design and engineering of electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are key to sustainable development. The structure of ABO 3 perovskites allows engineering of their electronic properties such as the energy of the Fermi level and the valence band maximum, which directly impact their electrocatalytic activity. Moreover, the covalency of the B−O bond and its electron affinity increase the polarization of −OH adsorbed at B-sites, leading to enhanced kinetics of OER. Here, a series of cobalt/copper perovskites (Ca 0.8 Sr 0.2 Co 1−x Cu x O 3−δ (x = 0, 0.5, and 1)) were prepared. In our finding, copper with a larger electron affinity compared to cobalt accelerates OER, while the coexistence of Co/Cu at the Bsites increases the activity of the system in ORR. The mechanism of OER is discussed based on the pH dependency on the reversible hydrogen electrode (RHE) scale and galvanostatic oxidation measurements. The results point to the lattice oxygen mechanism as the prevailing one.

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Section: Resultssupporting

confidence: 90%