An excellent OER electrocatalyst of cubic SrCoO_3−δ prepared by a simple F-doping strategy

Abstract

Cubic perovskite SrCoO3−δ was successfully prepared through simple anion F-doping and demonstrated great OER performance.

Tri‐Functional Double Perovskite Oxide Catalysts for Fuel Cells and Electrolyzers

“…This result is comparable to that of CF/BSCF (0.32 V @10 mA cm −2 and 0.65 V @150 mA cm −2 ), CF/PBSCF (0.34 V @10 mA cm −2 and 0.64 V @150 mA cm −2 ), and CF/GBSCF (0.36 V @10 mA cm −2 and 0.63 V @150 mA cm −2 ), and lower than that of CF (0.57 V @10 mA cm −2 ). Hence, our record material, CF/PBSCF−Ag, exhibits a lower overpotential compared to many other reported materials (Figure 2b) [8,32–35] . The Tafel slope (derived from the linear fit of overpotential vs. logarithmic current density plot (Figure S4a)) is another key parameter to obtain the rate of OER kinetics.…”

Rational Construction of a N, F Co‐doped Mesoporous Cobalt Phosphate with Rich‐Oxygen Vacancies for Oxygen Evolution Reaction and Supercapacitors

“…From Co 2p spectrum of NCoHPOF (Figure 4b), it could be seen that two peaks at 781.6 and 797.7 eV with two satellite peaks at 787.3 and 803.4 eV, which are attributed to the spin‐orbit splitting of Co 2p 3/2 and 2p 1/2 , respectively [31–33,43,44] . Compared with the pristine NCoHPOF, the Co 2p of NCoHPOF‐450 moves slightly towards high binding energy of 0.42 eV, which should be ascribed to the aliovalent N and F doping caused the electronic structure reconstruction on the material surface [31–36] . Notably, compared with NCoHPOF, the ratio of Co 2+ /Co 3+ in NCoHPOF‐450 increases from 1.68 to 1.76, which should be ascribed to the appearance of oxygen vacancies [5,45–47] .…”

2D Heterojunction Between Double Perovskite Oxide Nanosheet and Layered Double Hydroxide to Promote Rechargeable Zinc‐Air Battery Performance

“…The PXRD patterns of PBMNC‐ x NSs with tetragonal crystal structure have three additional reflections. The reflections at 2θ ∼24° and 44° correspond to BaCO 3 and metallic Co impurity phases, respectively (Figure 1a), [13,32] and the peak at 2θ ∼31.5° is due to another tetragonal ( P4/mmm ) phase of the electrochemically inactive Ba 3 Nb 5 O 12 (Table S1) [33] . Although these impurities are the result of Nb‐doping and high temperature reduction, this averse effect is overhauled by the added benefits of a favourable electronic environment at the Nb‐doped B‐site and the resultant 2D architecture [13,32] …”