biostudies-literatureAljabour AAustrian Science Fund FWFe202302208https://www.ebi.ac.uk/biostudies/studies/S-EPMC10947295biostudies-literatureUnknown62(21)As alternative energy sources are essential to reach a climate-neutral economy, hydrogen peroxide (H₂ O₂ ) as futuristic energy carrier gains enormous awareness. However, seeking for stable and electrochemically selective H₂ O₂ ORR electrocatalyst is yet a challenge, making the design of-ideally-bifunctional catalysts extremely important and outmost of interest. In this study, we explore the application of a trimetallic cobalt(II) triazole pyridine bis-[cobalt(III) corrole] complex Co^II TP[Co^III C]₂ 3 in OER and ORR catalysis due to its remarkable physicochemical properties, fast charge transfer kinetics, electrochemical reversibility, and durability. With nearly 100 % selective catalytic activity towards the two-electron transfer generated H₂ O₂ , an ORR onset potential of 0.8 V vs RHE and a cycling stability of 50 000 cycles are detected. Similarly, promising results are obtained when applied in OER catalysis. A relatively low overpotential at 10 mA cm^-2 of 412 mV, Faraday efficiency 98 % for oxygen, an outstanding Tafel slope of 64 mV dec^-1 combined with superior stability.Angewandte Chemie (International ed. in English)A Bifunctional Electrocatalyst for OER and ORR based on a Cobalt(II) Triazole Pyridine Bis-[Cobalt(III) Corrole] Complex.PMC10947295P 32045P28167P32045Song LScharber MCSchofberger WAljabour AOffenthaler SAwada HSun HYari FBechmann MfalseA Bifunctional Electrocatalyst for OER and ORR based on a Cobalt(II) Triazole Pyridine Bis-[Cobalt(III) Corrole] Complex.As alternative energy sources are essential to reach a climate-neutral economy, hydrogen peroxide (H₂ O₂ ) as futuristic energy carrier gains enormous awareness. However, seeking for stable and electrochemically selective H₂ O₂ ORR electrocatalyst is yet a challenge, making the design of-ideally-bifunctional catalysts extremely important and outmost of interest. In this study, we explore the application of a trimetallic cobalt(II) triazole pyridine bis-[cobalt(III) corrole] complex Co^II TP[Co^III C]₂ 3 in OER and ORR catalysis due to its remarkable physicochemical properties, fast charge transfer kinetics, electrochemical reversibility, and durability. With nearly 100 % selective catalytic activity towards the two-electron transfer generated H₂ O₂ , an ORR onset potential of 0.8 V vs RHE and a cycling stability of 50 000 cycles are detected. Similarly, promising results are obtained when applied in OER catalysis. A relatively low overpotential at 10 mA cm^-2 of 412 mV, Faraday efficiency 98 % for oxygen, an outstanding Tafel slope of 64 mV dec^-1 combined with superior stability.2023-01-01T00:00:00Z2023 May2025-04-20T02:50:22.333Z2025-02-19T03:09:37.133ZS-EPMC109472953682169910.1002/anie.202302208