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Research Article

Ni(OH)2 nanoparticles encapsulated in conductive nanowire array for high-performance alkaline seawater oxidation

Longcheng Zhang1,2,§, Jiaqian Wang2,3,§, Pengyu Liu2, Jie Liang2, Yongsong Luo2, Guanwei Cui1, Bo Tang1, Qian Liu4, Xuedong Yan5, Haigang Hao3, Meiling Liu6( ), Rui Gao3( ), Xuping Sun1,2 ( )
College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
Institute for Advanced Study, Chengdu University, Chengdu 610106, China
Ningbo Veken Battery Company, 5th Gangxi Avenue, West Bonded Zone, Ningbo College of Chemical Engineering, Ningbo Polytechnic, Ningbo 315800, China
Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education, China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China

§ Longcheng Zhang and Jiaqian Wang contributed equally to this work.

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Abstract

Design and development of high-efficiency and durable oxygen evolution reaction (OER) electrocatalysts is crucial for hydrogen production from seawater splitting. Herein, we report the in situ electrochemical conversion of a nanoarray of Ni(TCNQ)2 (TCNQ = tetracyanoquinodimethane) on graphite paper into Ni(OH)2 nanoparticles confined in a conductive TCNQ nanoarray (Ni(OH)2-TCNQ/GP) by anode oxidation. The Ni(OH)2-TCNQ/GP exhibits high OER performance and demands overpotentials of 340 and 382 mV to deliver 100 mA·cm−2 in alkaline freshwater and alkaline seawater, respectively. Meanwhile, the Ni(OH)2-TCNQ/GP also demonstrates steady long-term electrochemical durability for at least 80 h under alkaline seawater.

Graphical Abstract

Ni(OH)2-TCNQ/GP nanowire array acts as an efficient electrocatalyst for the oxygen evolution reaction in alkaline seawater, which only needs a low overpotential of 382 mV to deliver 100 mA·cm−2. Meanwhile, it also demonstrates strong long-term stability, maintaining its activity for at least 80 h.

Keywords

Ni(OH)2 nanoparticles tetracyanoquinodimethane (TCNQ) nanoarrayelectrocatalysisseawater splitting

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Nano Research
Volume 15 Issue 7,
July 2022
Pages 6084-6090
DOI: 10.1007/s12274-022-4391-6

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Cite this article:
Zhang L, Wang J, Liu P, et al. Ni(OH)2 nanoparticles encapsulated in conductive nanowire array for high-performance alkaline seawater oxidation. Nano Research, 2022, 15(7): 6084-6090. https://doi.org/10.1007/s12274-022-4391-6
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Electrocatalysts

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Received: 21 January 2022
Revised: 02 April 2022
Accepted: 05 April 2022
Published: 21 April 2022
© Tsinghua University Press 2022