Construction of symbiotic one-dimensional ionic channels in a cobalt-based covalent organic framework for high-performance oxygen reduction electrocatalysis

Ren, Rong; Yang, Liting; Zhang, Lin; Li, Xiaoyü; Zhang, Shuomeng; Zheng, Tianyu; Wu, Duojie; Wang, Jian; Wei, Yuan; Ding, Wei; Huang, Ning; Gu, Meng; He, Qinggang

doi:10.1039/d2ta06228c

“…TAT-TFBE Polymer OER/HER Alkaline water splitting [151] Au@PD-COP-II Polymer OER/HER Alkaline water splitting [152] Co-COP Polymer ORR/OER Zn-air battery [153] NiCoFe-NDA MOF OER AEMWE [154] NCF-MOF MOF OER/HER Alkaline water splitting [155] CdFe-BDC MOF OER/HER Sea water splitting [156] Ni-TAPP-Co COF ORR/OER Li-O 2 battery [157] FePc-BBL COF COF ORR Zn-air battery [105] TAPPCo-QA COF ORR AEMFC [158] possess high activity compatibility in assembled electrodes (including substrate, current collector, binder, conductive enhancer, ionomer, etc.) of actual devices should be proposed to realize the practical application of low-cost electrocatalysts.…”

Section: Ni(ii) Complexesmentioning

confidence: 99%

Section: Optimization Of Organic Electrocatalysts For Practical Appli...mentioning

confidence: 99%

Rational Design of Organic Electrocatalysts for Hydrogen and Oxygen Electrocatalytic Applications

Cheng,

He,

Li

et al. 2024

Advanced Materials

8

0

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Efficient electrocatalysts are pivotal for advancing green energy conversion technologies. Organic electrocatalysts, as cost‐effective alternatives to noble‐metal benchmarks, have garnered attention. However, the understanding of the relationships between their properties and electrocatalytic activities remains ambiguous. Plenty of research articles regarding low‐cost organic electrocatalysts started to gain momentum in 2010 and have been flourishing recently though, a review article for both entry‐level and experienced researchers in this field is still lacking. This review underscores the urgent need to elucidate the structure‐activity relationship and design suitable electrode structures, leveraging the unique features of organic electrocatalysts like controllability and compatibility for real‐world applications. Organic electrocatalysts are classified into four groups: small molecules, oligomers, polymers, and frameworks, with specific structural and physicochemical properties serving as activity indicators. To unlock the full potential of organic electrocatalysts, five strategies are discussed: integrated structures, surface property modulation, membrane technologies, electrolyte affinity regulation, and addition of anti‐corrosion species, all aimed at enhancing charge efficiency, mass transfer, and long‐term stability during electrocatalytic reactions. The review offers a comprehensive overview of the current state of organic electrocatalysts and their practical applications, bridging the understanding gap and paving the way for future developments of more efficient green energy conversion technologies.This article is protected by copyright. All rights reserved

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Precisely Engineering Asymmetric Atomic CoN₄ by Electron Donating and Extracting for Oxygen Reduction Reaction

Lv,

Cui,

Huang

et al. 2024

Angewandte Chemie

1

0

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The development of nonpyrolytic catalysts featuring precisely defined active sites represents an effective strategy for investigating the fundamental relationship between the catalytic activity of oxygen reduction reaction (ORR) catalysts and their local coordination environments. In this study, we have synthesized a series of model electrocatalysts with well‐defined CoN4 centers and nonplanar symmetric coordination structures. These catalysts were prepared by a sequential process involving the chelation of cobalt salts and 1,10‐phenanthroline‐based ligands with various substituent groups (phen(X), where X = OH, CH3, H, Br, Cl) onto covalent triazine frameworks (CTFs). By modulating the electron‐donating or electron‐withdrawing properties of the substituent groups on the phen‐based ligands, we were able to effectively control the electron density surrounding the CoN4 centers. Our results demonstrated a direct correlation between the catalytic activity of the CoN4 centers and the electron‐donating ability of the substituent group on the phenanthroline ligands. Notably, the catalyst denoted as BCTF‐Co‐phen(OH), featuring the electron‐donating OH group, exhibited the highest ORR catalytic activity. This custom‐crafted catalyst achieved a remarkable half‐wave potential of up to 0.80 V vs. RHE and an impressive turnover frequency (TOF) value of 47.4×10‐3 Hz at 0.80 V vs. RHE in an alkaline environment.

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Precisely Engineering Asymmetric Atomic CoN₄ by Electron Donating and Extracting for Oxygen Reduction Reaction

Lv,

Cui,

Huang

et al. 2024

Angew Chem Int Ed

10

0

View full text Add to dashboard Cite

The development of nonpyrolytic catalysts featuring precisely defined active sites represents an effective strategy for investigating the fundamental relationship between the catalytic activity of oxygen reduction reaction (ORR) catalysts and their local coordination environments. In this study, we have synthesized a series of model electrocatalysts with well‐defined CoN4 centers and nonplanar symmetric coordination structures. These catalysts were prepared by a sequential process involving the chelation of cobalt salts and 1,10‐phenanthroline‐based ligands with various substituent groups (phen(X), where X = OH, CH3, H, Br, Cl) onto covalent triazine frameworks (CTFs). By modulating the electron‐donating or electron‐withdrawing properties of the substituent groups on the phen‐based ligands, we were able to effectively control the electron density surrounding the CoN4 centers. Our results demonstrated a direct correlation between the catalytic activity of the CoN4 centers and the electron‐donating ability of the substituent group on the phenanthroline ligands. Notably, the catalyst denoted as BCTF‐Co‐phen(OH), featuring the electron‐donating OH group, exhibited the highest ORR catalytic activity. This custom‐crafted catalyst achieved a remarkable half‐wave potential of up to 0.80 V vs. RHE and an impressive turnover frequency (TOF) value of 47.4×10‐3 Hz at 0.80 V vs. RHE in an alkaline environment.

show abstract

Construction of symbiotic one-dimensional ionic channels in a cobalt-based covalent organic framework for high-performance oxygen reduction electrocatalysis

Abstract: With the advantages of high specific activity and selectivity, molecular catalysts are regarded as burgeoning electrode materials for anion exchange membrane fuel cells (AEMFCs). However, their catalytic performance in the...

Cited by 9 publications

References 63 publications

Rational Design of Organic Electrocatalysts for Hydrogen and Oxygen Electrocatalytic Applications

Rational Design of Organic Electrocatalysts for Hydrogen and Oxygen Electrocatalytic Applications

Precisely Engineering Asymmetric Atomic CoN₄ by Electron Donating and Extracting for Oxygen Reduction Reaction

Precisely Engineering Asymmetric Atomic CoN₄ by Electron Donating and Extracting for Oxygen Reduction Reaction

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Construction of symbiotic one-dimensional ionic channels in a cobalt-based covalent organic framework for high-performance oxygen reduction electrocatalysis

Abstract: With the advantages of high specific activity and selectivity, molecular catalysts are regarded as burgeoning electrode materials for anion exchange membrane fuel cells (AEMFCs). However, their catalytic performance in the...

Cited by 9 publications

References 63 publications

Rational Design of Organic Electrocatalysts for Hydrogen and Oxygen Electrocatalytic Applications

Rational Design of Organic Electrocatalysts for Hydrogen and Oxygen Electrocatalytic Applications

Precisely Engineering Asymmetric Atomic CoN4 by Electron Donating and Extracting for Oxygen Reduction Reaction

Precisely Engineering Asymmetric Atomic CoN4 by Electron Donating and Extracting for Oxygen Reduction Reaction

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Product

Resources

About

Precisely Engineering Asymmetric Atomic CoN₄ by Electron Donating and Extracting for Oxygen Reduction Reaction

Precisely Engineering Asymmetric Atomic CoN₄ by Electron Donating and Extracting for Oxygen Reduction Reaction