Covalent organic frameworks/carbon nanotubes composite with cobalt(II) pyrimidine sites for bifunctional oxygen electrocatalysis

Zhuangzhuang Wu; Lijuan Feng; Zhe Lu; Xinxin Yu; Yuzhen Zhao; Junming Luo; Shaolei Wang; Xinlong Tian; Qi Chen

Nano Materials Science (Aug 2024)

Covalent organic frameworks/carbon nanotubes composite with cobalt(II) pyrimidine sites for bifunctional oxygen electrocatalysis

Zhuangzhuang Wu,
Lijuan Feng,
Zhe Lu,
Xinxin Yu,
Yuzhen Zhao,
Junming Luo,
Shaolei Wang,
Xinlong Tian,
Qi Chen

Affiliations

Zhuangzhuang Wu: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Marine Science and Engineering, Hainan University, Haikou, 570228, PR China; Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, School of Chemistry, Northeast Normal University, Changchun, 130024, PR China
Lijuan Feng: School of Bioengineering, Zhuhai Campus of Zunyi Medical University, Zhuhai, 519041, PR China
Zhe Lu: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Marine Science and Engineering, Hainan University, Haikou, 570228, PR China
Xinxin Yu: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Marine Science and Engineering, Hainan University, Haikou, 570228, PR China
Yuzhen Zhao: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Marine Science and Engineering, Hainan University, Haikou, 570228, PR China
Junming Luo: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Marine Science and Engineering, Hainan University, Haikou, 570228, PR China
Shaolei Wang: Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, School of Chemistry, Northeast Normal University, Changchun, 130024, PR China; Corresponding author.
Xinlong Tian: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Marine Science and Engineering, Hainan University, Haikou, 570228, PR China; Corresponding author.
Qi Chen: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Marine Science and Engineering, Hainan University, Haikou, 570228, PR China; Corresponding author.

Journal volume & issue: Vol. 6, no. 4
pp. 419 – 427

Abstract

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With characteristics and advantages of functional composite materials, they are commendably adopted in numerous fields especially in oxygen electrocatalysis, which is due to the significant synergies between various components. Herein, a novel bifunctional oxygen electrocatalyst (Co-CNT@COF-Pyr) has been synthesized through in-situ growth of covalent organic frameworks (COFs) layers on the outer surface of highly conductive carbon nanotubes (CNTs) followed by coordination with Co(Ⅱ). For electrocatalytic OER, Co-CNT@COF-Pyr reveals a low overpotential (438 mV) in alkaline electrolyte (1.0 M aqueous solution of KOH) with a current density of 10 mA cm−2, which is comparable to most discovered COF-based catalysts. For electrocatalytic ORR, Co-CNT@COF-Pyr exhibits a low H2O2 yield range (9.0 %–10.1 %) and a reaction pathway close to 4e− (n = 3.82–3.80) in alkaline electrolyte (0.1 M aqueous solution of KOH) within the test potential range of 0.1–0.6 V vs. RHE, which is superior to most reported COF-based catalysts. Hence, this research could not only offer an innovative insight into the construction of composites, but also facilitate the practical application of renewable fuel cells, closed water cycle, and rechargeable metal-air batteries.

Published in Nano Materials Science

ISSN: 2589-9651 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: https://www.keaipublishing.com/en/journals/nano-materials-science/

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