Fe3C nanoparticles decorated Fe/N codoped graphene-like hierarchically carbon nanosheets for effective oxygen electrocatalysis |
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| Affiliation: | 1. National & Local Engineering Laboratory for Motive Power and Key Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, PR China;2. Collaborative Innovation Center of Henan Province for Green Motive Power and Key Materials, Henan Normal University, Xinxiang, Henan, 453007, PR China;1. Department of Chemical Engineering, Alagappa College of Technology, Anna University, Chennai 600025, Tamil Nadu, India;2. Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli 620015, Tamil Nadu, India;1. Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, PR China;2. College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin, 150001, PR China;1. Faculity of Chemistry and Chemical Engineering, Malek-Ashtar University of Technology, Tehran 15875-1774, Iran;2. Department of Applied Chemistry, Malek-Ashtar University of Technology, Isfahan 83145-115, Iran;1. School of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, China;2. Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment, North China University of Science and Technology, Tangshan 063210, China;1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;2. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | Hierarchically porous carbon sheets decorated with transition metal carbides nanoparticles and metal-nitrogen coordinative sites have been proposed as the promising non-precious metal oxygen electrocatalysts. In this work, we demonstrate a facile and low-cost strategy to in situ form Fe/N codoped hierarchically porous graphene-like carbon nanosheets abundant in Fe-Nx sites and Fe3C nanoparticles (Fe–N/C) from pyrolyzing chestnut shell precursor. The as-prepared Fe–N/C samples with abundant Fe-Nx sites and Fe3C nanoparticles show superior electrocatalytic activity to oxygen reduction reaction (ORR) in the alkaline medium as well as high stability and methanol tolerance due to the integration of multi-factors: the high content of Fe-Nx active sites, the coexistence of Fe3C, the unique hierarchically porous structure and high conductivity of carbon matrix. The optimal Fe–N/C-2-900 sample exhibits a more positive half-wave potential (−0.122 V vs. Ag/AgCl (3 M) reference electrode) than commercial 20 wt% Pt/C catalyst. This study provides a facile approach to synthesize Fe3C nanoparticles decorated Fe/N co-doped hierarchically porous carbon materials for effective oxygen electrocatalyst. |
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| Keywords: | Fe/N codoping Graphene-like carbon nanosheets Hierarchically porous Oxygen electrocatalyst |
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