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Yan Z, Guo S, Li C, Tan Z, Wang L, Wang W, Li G, Liu Y, Zhang H, Tang M, Feng Z, Wang Y, Li B. Core-bishell NiFe@NC@MoS 2 for boosting electrocatalytic activity towards ultra-efficient oxygen evolution reaction. J Colloid Interface Sci 2024; 674:823-833. [PMID: 38955013 DOI: 10.1016/j.jcis.2024.06.194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 06/24/2024] [Accepted: 06/25/2024] [Indexed: 07/04/2024]
Abstract
Designing and developing suitable oxygen evolution reaction (OER) catalysts with high activity and stability remain challenging in electrolytic water splitting. Hence, NiFe@NC@MoS2 core-bishell composites wrapped by molybdenum disulphide (MoS2) and nitrogen-doped graphene (NC) were prepared using hydrothermal synthesis in this research. NiFe@NC@MoS2 composite exhibits excellent performance with an overpotential of 288 mV and a Tafel slope of 53.2 mV·dec-1 at a current density of 10 mA·cm-2 in 1 M KOH solution, which is superior to commercial RuO2. NC and MoS2 bishells create profuse edge active sites that enhance the adsorption ability of OOH* while lowering the overall overpotential of the product and improving its oxygen precipitation performance. The density function theory(DFT) analysis confirms that the layered MoS2 in NiFe@NC@MoS2 provides additional edge active sites and enhances electron transfer, thus increasing the intrinsic catalytic activity. This research paves a novel way for developing OER electrocatalysts with excellent catalytic performance.
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Affiliation(s)
- Zhenwei Yan
- School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, PR China
| | - Shuaihui Guo
- School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, PR China
| | - Chuanbin Li
- School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, PR China
| | - Zhaojun Tan
- School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, PR China
| | - Lijun Wang
- School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, PR China.
| | - Wen Wang
- School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, PR China
| | - Gang Li
- School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, PR China
| | - Yanyan Liu
- College of Science, Henan Agriculture University, Zhengzhou 450002, PR China.
| | - Huanhuan Zhang
- College of Science, Henan Agriculture University, Zhengzhou 450002, PR China; College of Chemistry, Zhengzhou University, 100 Science Road, Zhengzhou 450001, PR China
| | - Mingqi Tang
- School of Materials Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, PR China
| | - Zaiqiang Feng
- School of Materials Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, PR China
| | - Yongfeng Wang
- Center for Carbon-based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, PR China.
| | - Baojun Li
- School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, PR China; College of Chemistry, Zhengzhou University, 100 Science Road, Zhengzhou 450001, PR China.
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Fan X, Li B, Zhu C, Yan F, Zhang X, Chen Y. Nitrogen and Sulfur Co-Doped Carbon-Coated Ni 3S 2/MoO 2 Nanowires as Bifunctional Catalysts for Alkaline Seawater Electrolysis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309655. [PMID: 38243851 DOI: 10.1002/smll.202309655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/30/2023] [Indexed: 01/22/2024]
Abstract
Bifunctional catalysts have inherent advantages in simplifying electrolysis devices and reducing electrolysis costs. Developing efficient and stable bifunctional catalysts is of great significance for industrial hydrogen production. Herein, a bifunctional catalyst, composed of nitrogen and sulfur co-doped carbon-coated trinickel disulfide (Ni3S2)/molybdenum dioxide (MoO2) nanowires (NiMoS@NSC NWs), is developed for seawater electrolysis. The designed NiMoS@NSC exhibited high activity in alkaline electrolyte with only 52 and 191 mV overpotential to attain 10 mA cm-2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Significantly, the electrolyzer (NiMoS@NSC||NiMoS@NSC) based on this bifunctional catalyst drove 100 mA cm-2 at only 1.71 V along with a robust stability over 100 h in alkaline seawater, which is superior to a platinum/nickel-iron layered double hydroxide couple (Pt||NiFe LDH). Theoretical calculations indicated that interfacial interactions between Ni3S2 and MoO2 rearranged the charge at interfaces and endowed Mo sites at the interfaces with Pt-like HER activity, while Ni sites on Ni3S2 surfaces at non-interfaces are the active centers for OER. Meanwhile, theoretical calculations and experimental results also demonstrated that interfacial interactions improved the electrical conductivity, boosting reaction kinetics for both HER and OER. This study presented a novel insight into the design of high-performance bifunctional electrocatalysts for seawater splitting.
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Affiliation(s)
- Xiaocheng Fan
- Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Bei Li
- College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Chunling Zhu
- Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Feng Yan
- College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Xitian Zhang
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, and School of Physics and Electronic Engineering, Harbin Normal University, Harbin, 150025, China
| | - Yujin Chen
- Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
- College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin, 150001, China
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