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Zhang T, Zhao Z, Li T, Diao Q, Lv L, Li Z. A highly efficient electrocatalyst for oxygen reduction reaction: Spinel MnCo2O4 nanoparticles supported on three-dimensional Nitrogen-doped graphene material with interconnected hierarchical porous nanostructure. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Zheng L, Zhao Y, Zhang H, Xia W, Tang J. Space-Confined Anchoring of Fe-N x on Concave N-Doped Carbon Cubes for Catalyzing Oxygen Reduction. CHEMSUSCHEM 2022; 15:e202102642. [PMID: 35083871 DOI: 10.1002/cssc.202102642] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/25/2022] [Indexed: 06/14/2023]
Abstract
Carbon-based electrocatalysts with atomically dispersed Fe-N-C display promising performance for oxygen reduction reaction (ORR) amongst non-precious electrocatalysts. Nonetheless, increasing the number and utilization of Fe-N-C active sites is challenging. Designing morphologies and adjusting the pore structure of carbon-based electrocatalysts would boost the mass transfer, enhance the utilization of the active sites, and increase the overall ORR performance. In this work, a concave N-doped carbon cubes structure adorned with highly external Fe-Nx was designed and produced by the space-confined induced strategy. The optimal electrocatalyst revealed excellent ORR activity in both alkaline and acidic electrolytes, with half-wave potentials of 0.86 and 0.75 V, respectively. The superior performance arose from its unique concave structure, possessing more accessible active sites with improved intrinsic activity, which holds promising potential for preparing advanced ORR electrocatalysts.
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Affiliation(s)
- Lingling Zheng
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, P. R. China
| | - Yingji Zhao
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, P. R. China
- Department of Nanoscience and Nanoengineering, Faculty of Science and Engineering, Waseda University, Shinjuku, Tokyo, 169-8555, Japan
- JST-ERATO Yamauchi Materials Space-Tectonics Project, Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, Shinjuku, Tokyo, 169-0051, Japan
| | - Hongjuan Zhang
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, P. R. China
| | - Wei Xia
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, P. R. China
| | - Jing Tang
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, P. R. China
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Wang X, Wang J, Jiang W, Chen C, Yu B, Xu R. Facile synthesis MnCo2O4 modifying PbO2 composite electrode with enhanced OER electrocatalytic activity for zinc electrowinning. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118916] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Béjar J, Espinosa-Magaña F, Guerra-Balcázar M, Ledesma-García J, Álvarez-Contreras L, Arjona N, Arriaga LG. Three-Dimensional-Order Macroporous AB 2O 4 Spinels (A, B =Co and Mn) as Electrodes in Zn-Air Batteries. ACS APPLIED MATERIALS & INTERFACES 2020; 12:53760-53773. [PMID: 33207869 DOI: 10.1021/acsami.0c14920] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this work, atomically substituted three-dimensionally ordered macroporous (3DOM) spinels based on Co and Mn (MnCo2O4 and CoMn2O4) were synthetized and used as cathodic electrocatalysts in a primary Zn-air battery. Scanning/transmission electron microscopy images show a 3DOM structure for both materials. Skeleton sizes of 114.4 and 140.8 nm and surface areas of 65.3 and 74.6 m2 g-1 were found for MnCo2O4 and CoMn2O4, respectively. The increase in surface area and higher presence of Mn3+ and Mn4+ species in the CoMn2O4 3DOM material improved battery performance with a maximum power density of 101.6 mW cm-2 and a specific capacity of 1440 mA h g-1, which shows the highest battery performance reported to date using similar spinel materials. The stability performance of the electrocatalyst was evaluated in half-cell and battery cell systems, showing the higher durability of CoMn2O4, which was related to its better capability to perform the electrocatalytic process as adsorption, electron transfer, and desorption. It was found through density functional theory calculations that the CoMn2O4 spinel has a higher density of states in the Fermi level vicinity and better conductivity. Finally, the unique shape of 3DOM spinels promoted a high interaction between electroactive species and catalytic sites, making them suitable for oxygen reduction reaction applications.
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Affiliation(s)
- José Béjar
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C., Querétaro C. P. 76703, Mexico
| | - Francisco Espinosa-Magaña
- Centro de Investigación en Materiales Avanzados S. C., Complejo Industrial Chihuahua, Chihuahua C. P. 31136, Mexico
| | - Minerva Guerra-Balcázar
- Facultad de Ingeniería, División de Investigación y Posgrado, Universidad Autónoma de Querétaro, Querétaro C. P. 76010, Mexico
| | - Janet Ledesma-García
- Facultad de Ingeniería, División de Investigación y Posgrado, Universidad Autónoma de Querétaro, Querétaro C. P. 76010, Mexico
| | - Lorena Álvarez-Contreras
- Centro de Investigación en Materiales Avanzados S. C., Complejo Industrial Chihuahua, Chihuahua C. P. 31136, Mexico
| | - Noé Arjona
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C., Querétaro C. P. 76703, Mexico
| | - Luis Gerardo Arriaga
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C., Querétaro C. P. 76703, Mexico
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Zhang T, Li Z, Wang L, Sun P, Zhang Z, Wang S. Spinel MnCo 2 O 4 Nanoparticles Supported on Three-Dimensional Graphene with Enhanced Mass Transfer as an Efficient Electrocatalyst for the Oxygen Reduction Reaction. CHEMSUSCHEM 2018; 11:2730-2736. [PMID: 29851295 DOI: 10.1002/cssc.201801070] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Indexed: 06/08/2023]
Abstract
The rational design of highly efficient and durable oxygen reduction reaction (ORR) catalysts is critical for the commercial application of fuel cells. Herein, three-dimensional graphene (3D-G) is synthesized by the template method, which used coal tar pitch as the carbon source and nano MgO as the template. Then, spinel MnCo2 O4 is in situ supported on the 3D-G by a facile hydrothermal method, giving MnCo2 O4 /3D-G. The resultant MnCo2 O4 /3D-G retains the multilayered mesoporous graphene structure where MnCo2 O4 nanoparticles are deposited on the inner walls of pores in the 3D-G. The catalyst MnCo2 O4 /3D-G shows high electrocatalytic activity with a half-wave potential of 0.81 V versus reversible hydrogen electrode, which is clearly superior to those of MnCo2 O4 /reduced graphene oxide (0.78 V), MnCo2 O4 /carbon nanotubes (0.74 V), MnCo2 O4 /C (0.72 V), and 20 wt % Pt/C (0.80 V). The electron transfer number of MnCo2 O4 /3D-G indicates a four-electron process of ORR. The durability test demonstrates that the MnCo2 O4 /3D-G catalyst has a much better durability than 20 wt % Pt/C. Our work makes an inspiring strategy to prepare high-performance electrocatalysts for the development of fuel cells.
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Affiliation(s)
- Tingwei Zhang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, 266# Xincun West Road, Zibo, 255049, Shandong Province, P. R. China
| | - Zhongfang Li
- School of Chemistry and Chemical Engineering, Shandong University of Technology, 266# Xincun West Road, Zibo, 255049, Shandong Province, P. R. China
| | - Likai Wang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, 266# Xincun West Road, Zibo, 255049, Shandong Province, P. R. China
| | - Peng Sun
- School of Chemistry and Chemical Engineering, Shandong University of Technology, 266# Xincun West Road, Zibo, 255049, Shandong Province, P. R. China
| | - Zhixu Zhang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, 266# Xincun West Road, Zibo, 255049, Shandong Province, P. R. China
| | - Suwen Wang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, 266# Xincun West Road, Zibo, 255049, Shandong Province, P. R. China
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