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Liu Y, Li X, Sun Q, Wang Z, Huang WH, Guo X, Fan Z, Ye R, Zhu Y, Chueh CC, Chen CL, Zhu Z. Freestanding 2D NiFe Metal-Organic Framework Nanosheets: Facilitating Proton Transfer via Organic Ligands for Efficient Oxygen Evolution Reaction. Small 2022; 18:e2201076. [PMID: 35638469 DOI: 10.1002/smll.202201076] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 05/14/2022] [Indexed: 06/15/2023]
Abstract
The oxygen evolution reaction (OER) is crucial to electrochemical hydrogen production. However, designing and fabricating efficient electrocatalysts still remains challenging. By confinedly coordinating organic ligands with metal species in layered double hydroxides (LDHs), an innovative LDHs-assisted approach is developed to facilely synthesize freestanding bimetallic 2D metal-organic framework nanosheets (2D MOF NSs), preserving the metallic components and activities in OER. Furthermore, the research has demonstrated that the incorporation of carboxyl organic ligands coordinated with metal atoms as proton transfer mediators endow 2D MOF NSs with efficient proton transfer during the electrochemical OHads → Oads transition. These freestanding NiFe-2D MOF NSs require a small overpotential of 260 mV for a current density of 10 mA cm-2 . When this strategy is applied to LDH nanosheets grown on nickel foam, the overpotential can be reduced to 221 mV. This outstanding OER activity supports the capability of multimetallic organic frameworks for the rational design of water oxidation electrocatalysts. This strategy provides a universal path to the synthesis of 2D MOF NSs that can be used as electrocatalysts directly.
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Affiliation(s)
- Yizhe Liu
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Xintong Li
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Qidi Sun
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Zilong Wang
- Siyuan Laboratory, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong, 510632, P. R. China
| | - Wei-Hsiang Huang
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology (NTUST), Taipei, 10607, Taiwan
- National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan, ROC
| | - Xuyun Guo
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong
| | - Zhanxi Fan
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Ruquan Ye
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Ye Zhu
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong
| | - Chu-Chen Chueh
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Chi-Liang Chen
- National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan, ROC
| | - Zonglong Zhu
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
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