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Tu Y, Li C, Shi Y, Jiang Y, Xiao W, Zhu S, Lv P, Yan X. Low-temperature molten salt synthesis and catalytic mechanism of CoS 2/NC as an advanced bifunctional electrocatalyst. Dalton Trans 2023. [PMID: 37486320 DOI: 10.1039/d3dt01694c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
The development of productive and sustainable bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) plays an important role in the commercial evolution of metal-air batteries. In this paper, a low-temperature molten salt template method was adopted to synthesize the composite of CoS2 and nitrogen-doped carbon (CoS2/NC) without the protection of inert gas. The structural characterization studies show that the specific surface area (SSA) and crystal growth kinetics are increased and effectively improved, respectively, by the composite of CoS2 and NC. The as-synthesized CoS2/NC composite demonstrates outstanding bifunctional catalytic activity in alkaline electrolytes and exhibits a half-wave potential (E1/2) of 0.854 V (vs. RHE) and an overpotential of only 220 mV for the OER at a current density of 10 mA cm-2 (η10). Simultaneously, CoS2/NC also exhibits excellent electrochemical stability. Additionally, density functional theory (DFT) calculations have manifested that the synergistic effect of CoS2 and NC results in a remarkable enhancement in the bifunctional catalytic performance of the composite materials. This study offers a new pathway and theoretical guidance for the fabrication of efficient bifunctional electrocatalysts.
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Affiliation(s)
- Yuankun Tu
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023 Hubei, PR China.
| | - Chuanhua Li
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023 Hubei, PR China.
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, PR China
| | - Yubao Shi
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023 Hubei, PR China.
| | - Yu Jiang
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023 Hubei, PR China.
| | - Wei Xiao
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023 Hubei, PR China.
| | - Shenghua Zhu
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023 Hubei, PR China.
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, PR China
| | - Peng Lv
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, PR China
| | - Xuemin Yan
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023 Hubei, PR China.
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Bhatti AL, Tahira A, Gradone A, Mazzaro R, Morandi V, aftab U, Abro MI, Nafady A, Qi K, Infantes-Molina A, Vomiero A, Ibupoto ZH. Nanostructured Co3O4 electrocatalyst for OER: The role of organic polyelectrolytes as soft templates. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139338] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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