Constructing 2D MOFs from 2D LDHs: A highly efficient and durable electrocatalyst for water oxidation

Mengke Cai; Qinglin Liu; Ziqian Xue; Yinle Li; Yanan Fan; Aiping Huang; Man Rong Li; Mark Croft; Trevor A. Tyson; Zhuofeng Ke; Guangqin Li

doi:10.1039/c9ta09397d

Constructing 2D MOFs from 2D LDHs: A highly efficient and durable electrocatalyst for water oxidation

Mengke Cai, Qinglin Liu, Ziqian Xue, Yinle Li, Yanan Fan, Aiping Huang, Man Rong Li, Mark Croft, Trevor A. Tyson, Zhuofeng Ke, Guangqin Li

Physics

Research output: Contribution to journal › Article › peer-review

100 Scopus citations

Abstract

Two-dimensional (2D) materials have been widely applied in electrochemical conversion technologies, especially toward the water oxidation reaction (WOR) in metal-air batteries and water splitting. Here, we demonstrate a facile ligand-assisted synthetic method, promoting the transformation of 2D layered double hydroxides (LDHs) into 2D metal-organic frameworks (MOFs). The CoFe-LDH precursor acts as an adjustable metal release source, controlling heterogeneous nucleation for 2D MOFs. Compared with most cobalt-based electrocatalysts, the optimized CoFe 2D MOFs exhibit a superior WOR performance on glassy-carbon electrodes (overpotential of 274 mV at 10 mA cm^-2 and a Tafel slope of 46.7 mV dec^-1) and long-term stability, due to the unique 2D characteristics and coupling effect between Co and Fe ions. More importantly, this work highlights the ability to transform 2D LDHs into 2D MOFs and reveals the intrinsic factors for excellent performance in the WOR.

Original language	English (US)
Pages (from-to)	190-195
Number of pages	6
Journal	Journal of Materials Chemistry A
Volume	8
Issue number	1
DOIs	https://doi.org/10.1039/c9ta09397d
State	Published - Jan 7 2020

All Science Journal Classification (ASJC) codes

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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title = "Constructing 2D MOFs from 2D LDHs: A highly efficient and durable electrocatalyst for water oxidation",

abstract = "Two-dimensional (2D) materials have been widely applied in electrochemical conversion technologies, especially toward the water oxidation reaction (WOR) in metal-air batteries and water splitting. Here, we demonstrate a facile ligand-assisted synthetic method, promoting the transformation of 2D layered double hydroxides (LDHs) into 2D metal-organic frameworks (MOFs). The CoFe-LDH precursor acts as an adjustable metal release source, controlling heterogeneous nucleation for 2D MOFs. Compared with most cobalt-based electrocatalysts, the optimized CoFe 2D MOFs exhibit a superior WOR performance on glassy-carbon electrodes (overpotential of 274 mV at 10 mA cm-2 and a Tafel slope of 46.7 mV dec-1) and long-term stability, due to the unique 2D characteristics and coupling effect between Co and Fe ions. More importantly, this work highlights the ability to transform 2D LDHs into 2D MOFs and reveals the intrinsic factors for excellent performance in the WOR.",

author = "Mengke Cai and Qinglin Liu and Ziqian Xue and Yinle Li and Yanan Fan and Aiping Huang and Li, {Man Rong} and Mark Croft and Tyson, {Trevor A.} and Zhuofeng Ke and Guangqin Li",

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year = "2020",

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doi = "10.1039/c9ta09397d",

language = "English (US)",

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T1 - Constructing 2D MOFs from 2D LDHs

T2 - A highly efficient and durable electrocatalyst for water oxidation

AU - Cai, Mengke

AU - Liu, Qinglin

AU - Xue, Ziqian

AU - Li, Yinle

AU - Fan, Yanan

AU - Huang, Aiping

AU - Li, Man Rong

AU - Croft, Mark

AU - Tyson, Trevor A.

AU - Ke, Zhuofeng

AU - Li, Guangqin

PY - 2020/1/7

Y1 - 2020/1/7

N2 - Two-dimensional (2D) materials have been widely applied in electrochemical conversion technologies, especially toward the water oxidation reaction (WOR) in metal-air batteries and water splitting. Here, we demonstrate a facile ligand-assisted synthetic method, promoting the transformation of 2D layered double hydroxides (LDHs) into 2D metal-organic frameworks (MOFs). The CoFe-LDH precursor acts as an adjustable metal release source, controlling heterogeneous nucleation for 2D MOFs. Compared with most cobalt-based electrocatalysts, the optimized CoFe 2D MOFs exhibit a superior WOR performance on glassy-carbon electrodes (overpotential of 274 mV at 10 mA cm-2 and a Tafel slope of 46.7 mV dec-1) and long-term stability, due to the unique 2D characteristics and coupling effect between Co and Fe ions. More importantly, this work highlights the ability to transform 2D LDHs into 2D MOFs and reveals the intrinsic factors for excellent performance in the WOR.

AB - Two-dimensional (2D) materials have been widely applied in electrochemical conversion technologies, especially toward the water oxidation reaction (WOR) in metal-air batteries and water splitting. Here, we demonstrate a facile ligand-assisted synthetic method, promoting the transformation of 2D layered double hydroxides (LDHs) into 2D metal-organic frameworks (MOFs). The CoFe-LDH precursor acts as an adjustable metal release source, controlling heterogeneous nucleation for 2D MOFs. Compared with most cobalt-based electrocatalysts, the optimized CoFe 2D MOFs exhibit a superior WOR performance on glassy-carbon electrodes (overpotential of 274 mV at 10 mA cm-2 and a Tafel slope of 46.7 mV dec-1) and long-term stability, due to the unique 2D characteristics and coupling effect between Co and Fe ions. More importantly, this work highlights the ability to transform 2D LDHs into 2D MOFs and reveals the intrinsic factors for excellent performance in the WOR.

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Constructing 2D MOFs from 2D LDHs: A highly efficient and durable electrocatalyst for water oxidation

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