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    MOF-Derived Isolated Fe Atoms Implanted in N-Doped 3D Hierarchical Carbon as an Efficient ORR Electrocatalyst in Both Alkaline and Acidic Media

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    Type
    Article
    Authors
    Chen, Xiaodong
    Wang, Ning cc
    Shen, Kui cc
    Xie, Yangkai
    Tan, Yongpeng
    Li, Yingwei cc
    KAUST Department
    Advanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
    Date
    2019-06-27
    Online Publication Date
    2019-06-27
    Print Publication Date
    2019-07-24
    Embargo End Date
    2020-01-01
    Permanent link to this record
    http://hdl.handle.net/10754/656769
    
    Metadata
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    Abstract
    In order to improve the catalytic performance of oxygen reduction reaction (ORR), it is pivotal to increase the density and accessibility of the active sites. Herein, we have developed a template-free melamine-assisted cocalcined strategy to afford Fe-embedded and N-doped carbons (Fe-N-C) with not only high density of atomically dispersed Fe-Nx active sites but also abundant three-dimensional interconnected mesopores by directly pyrolyzing Fe-ZIF-8 covered with a controllable melamine layer. It is demonstrated that the introduction of melamine in the precursor plays a key role in constructing various carbonized products with controllable morphology, porosity, and components. With an optimal mass ratio 1:1 of melamine to Fe-ZIF-8, the resultant Fe@MNC-1 exhibits excellent ORR activity and stability, which exceeds 20 wt % commercial Pt/C catalyst (with a half-wave potential of 0.88 V vs 0.85 V) in an alkaline electrolyte and is even comparable to the commercial Pt/C catalyst (with a half-wave potential of 0.78 V vs 0.80 V) in an acidic electrolyte. To the best of our knowledge, Fe@MNC-1 can be ranked among the best nonprecious metal electrocatalysts for ORR in both alkaline and acidic media. The present synthetic strategy may provide a new opportunity for the design and construction of metal-organic framework-derived nanomaterials with rational composition and a desired porous structure to boost their electrocatalytic performance.
    Citation
    Chen, X., Wang, N., Shen, K., Xie, Y., Tan, Y., & Li, Y. (2019). MOF-Derived Isolated Fe Atoms Implanted in N-Doped 3D Hierarchical Carbon as an Efficient ORR Electrocatalyst in Both Alkaline and Acidic Media. ACS Applied Materials & Interfaces, 11(29), 25976–25985. doi:10.1021/acsami.9b07436
    Sponsors
    This work was supported by the National Natural Science Foundation of China (21825802, 21436005, 21576095, 21606087), Guangdong Natural Science Funds for Distinguished Young Scholar (2018B030306050), the Science and Technology Program of Guangzhou (201804020009), the Pearl River S&T Nova Program of Guangzhou (201806010140), the State Key Laboratory of Pulp and Paper Engineering (2017ZD04, 2018TS03), and the Natural Science Foundation of Guangdong Province (2016A050502004, 2017A030312005).
    Publisher
    American Chemical Societyservice@acs.org
    Journal
    ACS Applied Materials and Interfaces
    DOI
    10.1021/acsami.9b07436
    Additional Links
    http://pubs.acs.org/doi/10.1021/acsami.9b07436
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsami.9b07436
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