A cobalt(II) porphyrin with a tethered imidazole for efficient oxygen reduction and evolution electrocatalysis

Li, Xialiang; Li, Ping; Yang, Jindou; Xie, Lisi; Wang, Ni; Lei, Haitao; Zhang, Chaochao; Zhang, Wei; Lee, Yong Min; Zhang, Weiqiang; Fukuzumi, Shunichi; Nam, Wonwoo; Cao, Rui

doi:10.1016/j.jechem.2022.10.010

Cited by 21 publications

(16 citation statements)

References 40 publications

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“…Cao group has also developed a Co‐porphyrin version with a similar strategy ( C5 , Scheme 1). [92] The cyclic voltammograms of C5 /CNT in O 2 ‐saturated aqueous solutions displayed a sharp rise in the current as compared to that in the presence of N 2 , corresponding to the electrocatalytic reduction of oxygen. In order to determine the O 2 reduction product, rotating‐ring disk electrode (RRDE) studies were conducted, based on which n values for ORR by C5 /CNT were calculated to be 3.29.…”

Section: Leading Examples Of Bifunctional Oer/orr Molecular Catalystsmentioning

confidence: 97%

Bio‐inspired Design of Bidirectional Oxygen Reduction and Oxygen Evolution Reaction Molecular Electrocatalysts

et al. 2023

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The proper utilization of renewable energy sources has emerged as a major challenge in our pursuit of a sustainable and carbon‐neutral energy landscape. Small molecule activation is a key component for proper utilization of renewable energy resources, where O2/H2O redox couple is reckoned a potential game changer. In this regard, electrocatalytic oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) have become the prime interest of catalyst designers. Typically, these ORR and OER electrocatalysts are developed distinctly; however, very soon, the requirement of a bidirectional ORR/OER electrocatalyst becomes obvious for practical applicability and rapid energy transduction purposes. A bidirectional catalyst is defined as a catalyst capable of driving a redox reaction in opposing directions. In this review, we have portrayed the development of enzyme structure‐inspired design of molecular bidirectional ORR/OER catalysts. The strategic incorporation of secondary and outer coordination sphere features has significantly enhanced the performance of these catalysts, which can be monitored via the key catalytic parameters. These bifunctional OER/ORR catalysts are vital for metal‐air battery and fuel cell applications and appropriately poised to lay the foundation for an efficient, economical, and eco‐friendly pathway for sustainable energy usage with the rational assembly of energy converting and storage devices.

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Section: Leading Examples Of Bifunctional Oer/orr Molecular Catalystsmentioning

confidence: 97%

Bio‐inspired Design of Bidirectional Oxygen Reduction and Oxygen Evolution Reaction Molecular Electrocatalysts

et al. 2023

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“…+ ORR with Co porphyrins [29,55] and Fe phthalocyanines. [47,56] Importantly, our recent studies showed that the presence of an imidazole group on the central metal ion can contribute greatly to promoting O 2 binding and activation for both Fe porphyrins [25] and Co porphyrins.…”

Section: Background and Originality Contentmentioning

confidence: 99%

A Cobalt(III) Corrole with a Tethered Imidazole for Boosted Electrocatalytic Oxygen Reduction Reaction

Peng

Luo

2023

Chin. J. Chem.

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Comprehensive SummaryDeveloping electrocatalysts with high activity and selectivity for the oxygen reduction reaction (ORR) is vital to promote the performance of the next‐generation energy technologies, which depend on the efficiency of the catalytic reduction of dioxygen. In the structure of cytochrome c oxidases (CcOs), a histidine imidazole residue binding to the axial position of Fe plays a crucial role in facilitating the selective reduction of O2 to water. Inspired by nature, we herein report on the synthesis of CoIII corrole 1 tethered with an imidazole ligand as well as its electrocatalytic ORR and O2 binding features. As compared to the imidazolium‐free analogue, complex 1 displayed remarkably boosted activity for the selective four‐electron/four‐proton (4e‐/4H+) ORR with a half‐wave potential of E1/2 = 0.82 V versus reversible hydrogen electrode (RHE) in 0.1 mol/L KOH solutions. Importantly, we demonstrate that the tethered axial imidazole ligand improves the O2 binding ability of 1 thermodynamically and dynamically, which is crucial to boost electrocatalytic ORR performance. This work presents an example to improve electrocatalytic ORR activity and selectivity of Co corroles by introducing an axial imidazole ligand to enhance the O2 binding and activation.

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“…4,58 Inspired by CcOs, tremendous efforts have been devoted to tuning the catalytic performance of metal porphyrins through the incorporation of functional groups in the secondcoordination sphere. 28,29,[59][60][61][62][63][64][65][66] For instance, it was demonstrated that introducing hydrogen-bonding interactions, 35,67,68 proton relays 69,70 and electrostatic interactions 71,72 to the molecular backbone of metal porphyrins can dramatically improve the O 2 binding and subsequent conversion to H 2 O. By contrast, metal corrole molecules typically exhibit better catalytic ORR properties than relevant metal porphyrins, 29,31,73 because the trianionic corrole macrocycles are more effective than dianionic porphyrin macrocycles at stabilizing high-valent metal ions, which are intermediates in the ORR process.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic oxygen reduction with cobalt corroles bearing cationic substituents

Gao

Lei

Bao

et al. 2023

Phys. Chem. Chem. Phys.

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A cobalt(II) porphyrin with a tethered imidazole for efficient oxygen reduction and evolution electrocatalysis

Cited by 21 publications

References 40 publications

Bio‐inspired Design of Bidirectional Oxygen Reduction and Oxygen Evolution Reaction Molecular Electrocatalysts

Bio‐inspired Design of Bidirectional Oxygen Reduction and Oxygen Evolution Reaction Molecular Electrocatalysts

A Cobalt(III) Corrole with a Tethered Imidazole for Boosted Electrocatalytic Oxygen Reduction Reaction

Electrocatalytic oxygen reduction with cobalt corroles bearing cationic substituents

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