Ran Ji, Chen-Yang Wang, Ke-Ming Fang, Jiu-Ju Feng, Lu Zhang, Ai-Jun Wang
{"title":"Confined pyrolysis synthesis of N-doped carbon-supported FePr nanoparticles for efficient oxygen reduction based on 3d–4 f orbital coupling","authors":"Ran Ji, Chen-Yang Wang, Ke-Ming Fang, Jiu-Ju Feng, Lu Zhang, Ai-Jun Wang","doi":"10.1016/j.jallcom.2024.177332","DOIUrl":null,"url":null,"abstract":"To meet the growing demand for new energy storage and conversion technologies, there is an urgent need to prepare highly efficient, economical and durable oxygen reduction catalysts that can replace those based on precious. Herein, N-doped porous carbon supported FePr nanoparticles (FePr/NC) from MOFs were prepared by confined adsorption and pyrolysis. The characterizations and electrocatalytic properties of the FePr/NC were investigated in details. The prepared FePr/NC catalyst showed excellent ORR catalytic performance with a half-wave potential (<em>E</em><sub>1/2</sub>) of only 0.87<!-- --> <!-- -->V in a 0.1<!-- --> <!-- -->M KOH solution, outperforming commercial Pt/C catalyst (<em>E</em><sub>1/2</sub> = 0.82<!-- --> <!-- -->V) under the identical conditions. Besides, its onset potential (<em>E</em><sub>onset</sub>) was up to 1.002<!-- --> <!-- -->V), exceeding the Pt/C (<em>E</em><sub>onset</sub> = 0.92<!-- --> <!-- -->V. Moreover, the <em>E</em><sub>1/2</sub> only exhibited a negative shift of 7<!-- --> <!-- -->mV after 2000 cycles, reflecting its significant stability. To understand their exceptional preference for the ORR, the electronic structure of Fe influenced by the doped Pr and the synergistic effect of the FePr nanoparticles with N-doped carbon were investigated. The coupling of Fe's 3d orbitals with Pr's 4<!-- --> <!-- -->f orbitals in FePr significantly enhanced the electrocatalytic activity. This work provides a promising strategy for preparation of high-quality transition metal-based carbon catalysts for green energy devices.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":null,"pages":null},"PeriodicalIF":5.8000,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Alloys and Compounds","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.jallcom.2024.177332","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
To meet the growing demand for new energy storage and conversion technologies, there is an urgent need to prepare highly efficient, economical and durable oxygen reduction catalysts that can replace those based on precious. Herein, N-doped porous carbon supported FePr nanoparticles (FePr/NC) from MOFs were prepared by confined adsorption and pyrolysis. The characterizations and electrocatalytic properties of the FePr/NC were investigated in details. The prepared FePr/NC catalyst showed excellent ORR catalytic performance with a half-wave potential (E1/2) of only 0.87 V in a 0.1 M KOH solution, outperforming commercial Pt/C catalyst (E1/2 = 0.82 V) under the identical conditions. Besides, its onset potential (Eonset) was up to 1.002 V), exceeding the Pt/C (Eonset = 0.92 V. Moreover, the E1/2 only exhibited a negative shift of 7 mV after 2000 cycles, reflecting its significant stability. To understand their exceptional preference for the ORR, the electronic structure of Fe influenced by the doped Pr and the synergistic effect of the FePr nanoparticles with N-doped carbon were investigated. The coupling of Fe's 3d orbitals with Pr's 4 f orbitals in FePr significantly enhanced the electrocatalytic activity. This work provides a promising strategy for preparation of high-quality transition metal-based carbon catalysts for green energy devices.
期刊介绍:
The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.