Bifunctional electrocatalytic activity of La0.8Sr0.2MnO3-based perovskite with the A-site deficiency for oxygen reduction and evolution reactions in alkaline media

Bifunctional electrochemical properties of La0.8Sr0.2Co0.8M0.2O3−δ(M = Ni, Fe, Mn, and Cu): efficient elemental doping based on a structural and pH-dependent study

“…6,7 Perovskite oxides (ABO 3 ) have the potential of being bifunctional catalysts or efficient oxygen electrodes due to their excellent oxygen mobility, low cost and their structures with atomic-level defects that play important roles in the OER/ORR. [8][9][10] One way to improve the OER/ORR of perovskite oxides is to increase their specific surface area and porosity of the catalysts, which have been reported to be beneficial for exposing more accessible active sites and facilitating the mass transfer and electron transfer during the OER/ORR processes. 11,12 However, the morphology optimization is difficult to break through the limitation of material's intrinsic properties.…”

Cation Deficiency Tuning of LaCoO3 Perovskite as Bifunctional Oxygen Electrocatalyst

“…Implementation of perovskites as oxygen electrocatalysts was originally discovered in 1970s, [20] followed by more and more study on perovskites, especially La-based perovskites [21] for oxygen electrocatalysis. Up to date, several approaches have been applied to boost the electrocatalytic activity of perovskites, including oxygen vacancy creation in perovskites through A-site cation deficiency [22] or doping with other metal cations. [6,19] Besides, introduction of extra metal ions into B-sites can provide additional active sites in perovskites, leading to improved catalytic activities.…”

Perovskite Oxides for Cathodic Electrocatalysis of Energy‐Related Gases: From O2 to CO2 and N2

“…It was proposed to be attributed to the increased content of oxygen vacancies and the formation of Fe 4+ /Fe 3+ couple. [75] Compared with the A-site deficient material, [76,77] A-site excessive perovskite oxides have been rarely investigated for ORR catalysis due to the relatively inferior stability. In 2019, Xu and co-workers showed that (La 0.8 Sr 0.2 ) 1+x MnO 3 with excessive A-site cations was a robust ORR catalyst.…”

“…Inspiringly, some bifunctional perovskite oxide catalysts have been developed for both ORR and OER, making it feasible for rechargeable fuel cells. [68,72,76,78,81,82,85,92] Furthermore, trifunctional perovskite oxides recently have been reported to catalyze ORR, OER and HER in the identical alkaline condition, which provides the possibility for integrating the catalyst into the water electrolyzer-fuel cell systems. [102,103] Collectively, we are confident that the multifunctionality of perovskite oxides can be boosted by diverse strategies, including morphological tailoring, structure engineering, and introduction of specific active sites, [118] which will undoubtedly promote the widespread application of perovskite oxides in energy and environmental fields.…”