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Chen S, Xu J, Chen J, Yao Y, Wang Z, Li P, Li Y, Wang F. Ru doping induced interface engineering in flower-liked CoMoO 4-RuO 2 boosts oxygen electrocatalysis for rechargeable Zn-air battery. J Colloid Interface Sci 2024; 658:230-237. [PMID: 38104405 DOI: 10.1016/j.jcis.2023.12.066] [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: 10/23/2023] [Revised: 12/01/2023] [Accepted: 12/10/2023] [Indexed: 12/19/2023]
Abstract
Constructing heterogeneous catalysts can significantly boost the electrocatalytic activity due to the improved intrinsic catalytic activity induced by tailored electronic structure and optimized chemisorption to the reaction intermediates. RuO2 based electrocatalysts are especially attractive due to the high catalytic activity of RuO2. To reduce the usage of noble metal and improve the catalytic activity of catalyst, CoMoO4-RuO2 micro-flower was synthesized using a facile hydrothermal-calcination method in this work. CoMoO4-RuO2 exhibits a low overpotential of 177 mV at 10 mA cm-2 for oxygen evolution reaction (OER) and a high half-wave potential of 0.858 V for oxygen reduction reaction (ORR). Moreover, the Zn-air battery assembled using CoMoO4-RuO2 exhibit shows a high maximum discharge power density of 149 mW cm-2 and a large open circuit voltage of 1.38 V. The good performance can be attributed to the incorporation of RuO2, which not only induces extra catalytic active sites, but also forms heterojunction with CoMoO4 to optimize the electronic structure of CoMoO4-RuO2, thereby achieving a better equilibrium of absorption and desorption of intermediates. The work provides insights into designing RuO2 based electrocatalysts for advanced electrocatalysis.
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Affiliation(s)
- Siru Chen
- School of Material and Chemical Engineering, Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou 450007, China.
| | - Junlong Xu
- School of Material and Chemical Engineering, Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Junyan Chen
- School of Material and Chemical Engineering, Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Yingying Yao
- School of Material and Chemical Engineering, Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Zhuo Wang
- School of Material and Chemical Engineering, Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Pengyu Li
- School of Material and Chemical Engineering, Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Yanqiang Li
- School of Materials Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China.
| | - Fang Wang
- School of Material and Chemical Engineering, Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou 450007, China.
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Wu Z, Hu X, Cai C, Wang Y, Li X, Wen J, Li B, Gong H. Controlled three-dimensional leaf-like NiCoO 2@NiCo layered double hydroxide heterostructures for oxygen evolution electrocatalysts in rechargeable Zn-air batteries. J Colloid Interface Sci 2024; 657:75-82. [PMID: 38035421 DOI: 10.1016/j.jcis.2023.11.157] [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: 09/25/2023] [Revised: 11/22/2023] [Accepted: 11/24/2023] [Indexed: 12/02/2023]
Abstract
Rechargeable zinc-air batteries (ZABs) have garnered attention as a viable choice for large-scale energy storage due to their advantageous characteristics, such as high energy density and cost-effectiveness. Strategies aimed at improving the kinetics of the oxygen evolution reaction (OER) through advanced electrocatalytic materials or structural designs can significantly enhance the efficiency and longevity of ZABs. In this study, we introduce a three-dimensional (3D) leaf-vein system heterojunction architecture. In this structure, NiCoO2 nanowire arrays form the central vein, surrounded by an outer leaf composed of NiCo layered double hydroxide (LDH) nanosheets. All these components are integrated onto a substrate made of Ni foam. Notably, when tested in an alkaline environment, the NiCoO2@NiCo LDH exhibited an overpotential of 272 mV at a current density of 10 mA cm-2, and extended durability evaluations over 12 h underscored its robustness at 99.76 %. The rechargeable ZABs achieved a peak power density of 149 mW cm-2. Furthermore, the NiCoO2@NiCo LDH demonstrated stability by maintaining high round-trip efficiencies throughout more than 680 cycles (equivalent to 340 h) under galvanostatic charge-discharge cycling at 5 mA cm-2. The leaf-vein system heterojunction significantly increased the active sites of the catalysts, facilitating charge transport, improving electronic conductivity, and enhancing overall stability.
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Affiliation(s)
- Zhenkun Wu
- School of Science, Chongqing Key Laboratory of Green Energy Materials Technology and Systems, Chongqing University of Technology, Chongqing 400054, China
| | - Xiaolin Hu
- School of Science, Chongqing Key Laboratory of Green Energy Materials Technology and Systems, Chongqing University of Technology, Chongqing 400054, China.
| | - Chengbin Cai
- School of Science, Chongqing Key Laboratory of Green Energy Materials Technology and Systems, Chongqing University of Technology, Chongqing 400054, China
| | - Yuru Wang
- School of Science, Chongqing Key Laboratory of Green Energy Materials Technology and Systems, Chongqing University of Technology, Chongqing 400054, China
| | - Xiang Li
- School of Science, Chongqing Key Laboratory of Green Energy Materials Technology and Systems, Chongqing University of Technology, Chongqing 400054, China
| | - Jie Wen
- School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Bangxing Li
- School of Science, Chongqing Key Laboratory of Green Energy Materials Technology and Systems, Chongqing University of Technology, Chongqing 400054, China
| | - Hengxiang Gong
- School of Science, Chongqing Key Laboratory of Green Energy Materials Technology and Systems, Chongqing University of Technology, Chongqing 400054, China
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