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Nano Research 2022, 15(6): 4986-4995 https://doi.org/10.1007/s12274-022-4144-6
Research Article | Issue | Published: 10 March 2022

Interface construction of NiCo LDH/NiCoS based on the 2D ultrathin nanosheet towards oxygen evolution reaction

Show Author's Information Jiahui Li1,  Lili Wang1( ),  Haojia He2,  Yiquan Chen2,  Zirui Gao3,  Na Ma4,  Bing Wang1,  Linlin Zheng1,  Rulin Li1,  Yujia Wei1,  Junqing Xu5,  Yao Xu3,  Bowen Cheng4,  Zhen Yin4( ),  Ding Ma3( )
State Key Laboratory of Separation Membranes and Membrane Processes, School of Chemistry, Tiangong University, Tianjin 300387, China
School of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China
Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT, Peking University, Beijing 100871, China
College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
China Tianchen Engineering Corporation, Tianjin 300400, China
Keywords:
oxygen evolution reaction, layered double hydroxide, ultrathin nanosheet, hybrid structure, surface sulfidation, interface of NiCo LDH/NiCoS
Topics:
Oxygen evolution reaction
Cite this article:
Li J, Wang L, He H, et al. Interface construction of NiCo LDH/NiCoS based on the 2D ultrathin nanosheet towards oxygen evolution reaction. Nano Research, 2022, 15(6): 4986-4995. https://doi.org/10.1007/s12274-022-4144-6
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Abstract Full text Electronic supplementary material About this article

Carbon-free hydrogen as a promising clean energy source can be produced with electrocatalysts via water electrolysis. Oxygen evolution reaction (OER) as anodic reaction determines the overall efficiency of water electrolysis due to sluggish OER kinetics. Thus, it’s much desirable to explore the efficient and earth-abundant transition-metal-based OER electrocatalysts with high current density and superior stability for industrial alkaline electrolyzers. Herein, we demonstrate a significant enhancement of OER kinetics with the hybrid electrocatalyst arrays in alkaline via judiciously combining earth-abundant and ultrathin NiCo-based layered double hydroxide (NiCo LDH) nanosheets with nickel cobalt sulfides (NiCoS) with a facile metal-organic framework (MOF)-template-involved surface sulfidation process. The obtained NiCo LDH/NiCoS hybrid arrays exhibits an extremely low OER overpotential of 308 mV at 100 mA·cm−2, 378 mV at 200 mA·cm−2 and 472 mV at 400 mA·cm−2 in 1 M KOH solution, respectively. A much low Tafel slope of 48 mV·dec−1 can be achieved. Meanwhile, with the current density from 50 to 250 mA·cm−2, the NiCo-LDH/NiCoS hybrid arrays can run for 25 h without any degradation. Our results demonstrate that the construction of hybrid arrays with abundant interfaces of NiCo LDH/NiCoS can facilitate OER kinetics via possible modulation of binding energy of O-containing intermediates in alkaline media. The present work would pave the way for the development of low-cost and efficient OER catalysts and industrial application of water alkaline electrolyzers.


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Abstract
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Electronic supplementary material
About this article

Interface construction of NiCo LDH/NiCoS based on the 2D ultrathin nanosheet towards oxygen evolution reaction

Show Author's information Jiahui Li1, Lili Wang1( ), Haojia He2, Yiquan Chen2, Zirui Gao3, Na Ma4, Bing Wang1, Linlin Zheng1, Rulin Li1, Yujia Wei1, Junqing Xu5, Yao Xu3, Bowen Cheng4, Zhen Yin4( ), Ding Ma3( )
State Key Laboratory of Separation Membranes and Membrane Processes, School of Chemistry, Tiangong University, Tianjin 300387, China
School of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China
Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT, Peking University, Beijing 100871, China
College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
China Tianchen Engineering Corporation, Tianjin 300400, China

Abstract

Carbon-free hydrogen as a promising clean energy source can be produced with electrocatalysts via water electrolysis. Oxygen evolution reaction (OER) as anodic reaction determines the overall efficiency of water electrolysis due to sluggish OER kinetics. Thus, it’s much desirable to explore the efficient and earth-abundant transition-metal-based OER electrocatalysts with high current density and superior stability for industrial alkaline electrolyzers. Herein, we demonstrate a significant enhancement of OER kinetics with the hybrid electrocatalyst arrays in alkaline via judiciously combining earth-abundant and ultrathin NiCo-based layered double hydroxide (NiCo LDH) nanosheets with nickel cobalt sulfides (NiCoS) with a facile metal-organic framework (MOF)-template-involved surface sulfidation process. The obtained NiCo LDH/NiCoS hybrid arrays exhibits an extremely low OER overpotential of 308 mV at 100 mA·cm−2, 378 mV at 200 mA·cm−2 and 472 mV at 400 mA·cm−2 in 1 M KOH solution, respectively. A much low Tafel slope of 48 mV·dec−1 can be achieved. Meanwhile, with the current density from 50 to 250 mA·cm−2, the NiCo-LDH/NiCoS hybrid arrays can run for 25 h without any degradation. Our results demonstrate that the construction of hybrid arrays with abundant interfaces of NiCo LDH/NiCoS can facilitate OER kinetics via possible modulation of binding energy of O-containing intermediates in alkaline media. The present work would pave the way for the development of low-cost and efficient OER catalysts and industrial application of water alkaline electrolyzers.

Keywords: oxygen evolution reaction, layered double hydroxide, ultrathin nanosheet, hybrid structure, surface sulfidation, interface of NiCo LDH/NiCoS

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Publication history
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Acknowledgements

Publication history

Received: 02 December 2021
Revised: 03 January 2022
Accepted: 09 January 2022
Published: 10 March 2022
Issue date: April 2022

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

We acknowledge the financial supports from the National Natural Science Foundation of China (Nos. 51908408 and 21872104), the Natural Science Foundation of Tianjin for Distinguished Young Scholar (No. 20JCJQJC00150) and Innovative Research Team of Tianjin Municipal Education Commission (No. TD13-5008). D. M. acknowledges the support from the Tencent Foundation through the XPLORER PRIZE.

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