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2D Single‐Atom Catalyst with Optimized Iron Sites Produced by Thermal Melting of Metal–Organic Frameworks for Oxygen Reduction Reaction
Author(s) -
Liu Dong,
Li JinCheng,
Ding Shichao,
Lyu Zhaoyuan,
Feng Shuo,
Tian Hangyu,
Huyan Chenxi,
Xu Mingjie,
Li Tao,
Du Dan,
Liu Peng,
Shao Minhua,
Lin Yuehe
Publication year - 2020
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.201900827
Subject(s) - catalysis , zeolitic imidazolate framework , imidazolate , metal , metal organic framework , graphene , materials science , oxygen reduction reaction , atom (system on chip) , chemical engineering , nanoparticle , inorganic chemistry , chemistry , nanotechnology , metallurgy , organic chemistry , electrochemistry , adsorption , electrode , computer science , embedded system , engineering
Zeolitic‐imidazolate‐frameworks‐8 (ZIF‐8) derivatives have recently been demonstrated as one of the most ideal precursors to prepare single‐atom metal catalysts for oxygen reduction reaction (ORR). However, abundant single‐atom metal sites are buried in the derived carbon nanoparticles, rendering them useless for ORR. Here a novel ZIF‐8 “thermal melting” strategy is proposed to prepare a high specific surface area of Fe‐N‐doped graphene nanosheets (Fe‐N/GNs) with single‐atom Fe‐sites on the surface which are accessible to electrolytes, optimizing their utilization and improving ORR activity. As a result, the Fe‐N/GNs material exhibits excellent ORR activity with half‐wave potentials of 0.903 V in alkaline media and 0.837 V in acidic media, which are comparable to commercial Pt/C catalysts.