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Cai J, Zhang X, Wang T, Shi Y, Lin S. Synthesis of a carbon-wrapped microsphere MoO 2/Mo 2C heterojunction as an efficient electrocatalyst for the oxygen reduction reaction and the hydrogen evolution reaction. Dalton Trans 2023; 52:13991-14002. [PMID: 37740289 DOI: 10.1039/d3dt02537c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
The development of non-noble metal catalysts for the optimization of conversion and storage devices is an important research topic. Hence, the microsphere MoO2/Mo2C/C heterojunction composites, which play an important role in the oxygen reduction reaction (ORR) and the hydrogen evolution reaction (HER), were synthesized using the solvothermal-sintering method. The results revealed that the as-prepared composite exhibited better ORR and HER catalytic performances than those of MoO2/Mo2C and Vulcan XC-72R (carbon black), and approaching that of commercial Pt/C. At the same time, it has a superior methanol tolerance and electrochemical stability than that of the commercial Pt/C. The excellent performance may be attributed to the synergistic effect of the MoO2/Mo2C heterostructure, highly conductive Vulcan XC-72R, and oxygen vacancies (Ov). This research offers new insights into the design and synthesis of cost-effective, environmentally friendly heterojunction composite catalysts used as a high-performance cathode material in fuel cells and water splitting.
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Affiliation(s)
- Jiannan Cai
- Fujian Polytechnic Normal University, Fuzhou 350300, China.
| | - Xiaofeng Zhang
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, China.
- Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fuzhou 350007, China
| | - Ting Wang
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, China.
- Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fuzhou 350007, China
| | - Yuande Shi
- Fujian Polytechnic Normal University, Fuzhou 350300, China.
| | - Shen Lin
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, China.
- Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fuzhou 350007, China
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Patil R, Liu S, Yadav A, Khaorapapong N, Yamauchi Y, Dutta S. Superstructures of Zeolitic Imidazolate Frameworks to Single- and Multiatom Sites for Electrochemical Energy Conversion. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2203147. [PMID: 36323587 DOI: 10.1002/smll.202203147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 09/24/2022] [Indexed: 06/16/2023]
Abstract
The exploration of electrocatalysts with high catalytic activity and long-term stability for electrochemical energy conversion is significant yet remains challenging. Zeolitic imidazolate framework (ZIF)-derived superstructures are a source of atomic-site-containing electrocatalysts. These atomic sites anchor the guest encapsulation and self-assembly of aspheric polyhedral particles produced using microreactor fabrication. This review provides an overview of ZIF-derived superstructures by highlighting some of the key structural types, such as open carbon cages, 1D superstructures, hollow structures, and the interconversion of superstructures. The fundamentals and representative structures are outlined to demonstrate the role of superstructures in the construction of materials with atomic sites, such as single- and dual-atom materials. Then, the roles of ZIF-derived single-atom sites for the electroreduction of CO2 and electrochemical synthesis of H2 O2 are discussed, and their electrochemical performance for energy conversion is outlined. Finally, the perspective on advancing single- and dual-atom electrode-based electrochemical processes with enhanced redox activity and a low-impedance charge-transfer pathway for cathodes is provided. The challenges associated with ZIF-derived superstructures for electrochemical energy conversion are discussed.
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Affiliation(s)
- Rahul Patil
- Electrochemical Energy and Sensor Research Laboratory, Amity Institute of Click Chemistry Research and Studies, Amity University, 201303, Noida, India
| | - Shude Liu
- JST-ERATO Yamauchi Materials Space-Tectonics Project, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Anubha Yadav
- Electrochemical Energy and Sensor Research Laboratory, Amity Institute of Click Chemistry Research and Studies, Amity University, 201303, Noida, India
| | - Nithima Khaorapapong
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, 40002, Khon Kaen, Thailand
| | - Yusuke Yamauchi
- JST-ERATO Yamauchi Materials Space-Tectonics Project, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Saikat Dutta
- Electrochemical Energy and Sensor Research Laboratory, Amity Institute of Click Chemistry Research and Studies, Amity University, 201303, Noida, India
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