Journal
CHEMISTRY OF MATERIALS
Volume 29, Issue 23, Pages 9915-9922Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.7b03100
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Funding
- National Natural Science Foundation of China [51502320, 21503259, 21373255]
- Chinese Academy of Sciences [201SYCR001]
- Shanxi funds [201601D021060, MC2014-01]
- Shanxi Scholarship Council of China
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China
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Low-cost preparation of durable electrocatalysts is vital for energy storage and conversion. Here, we integrated two methods of synthesizing isolated iron atoms into a special carbon matrix as an advanced electrocatalyst. Atomic Fe isolation and graphene nanomeshes or curved carbon nanoshells were almost synthesized simultaneously. The hierarchical atomic Fe/carbon material with 0.53 atom % Fe exhibited superior oxygen reduction reaction (ORR) performance to Pt-C (20 wt % Pt) with 40 mV more positive onset potential, larger current density, and stronger methanol-tolerant capability. We demonstrated that the catalytic active sites were Fe isolation and coordinated with nitrogen in the porous curved carbon-graphene matrix. This strategy could be developed into a general approach to prepare atomic metal/carbon electrocatalysts.
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