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Iron Phosphide Incorporated into Iron-Treated Heteroatoms-Doped Porous Bio-Carbon as Efficient Electrocatalyst for the Oxygen Reduction Reaction
- Iron Phosphide Incorporated into Iron-Treated Heteroatoms-Doped Porous Bio-Carbon as Efficient Electrocatalyst for the Oxygen Reduction Reaction
- Tran, Thanh Nhan; Song, Min Young; Kang, Tong Hyun; Samdani, Jitendra; Park, Hyean Yeol; Kim, Ha Suck; Jhung, S.H.; Yu, Jong-Sung
- DGIST Authors
- Yu, Jong-Sung
- Issue Date
- ChemElectroChem, 5(14), 1944-1953
- Article Type
- Biomass; Carbon; Electrocatalysts; Electrolytic reduction; Oxygen; Porosity; Porous materials; Pyrolysis; Catalytic performance; Heteroatoms; Hierarchical porous structures; Iron phosphide; Long term durability; Oxygen reduction reaction; Porous carbons; Pyrolysis temperature; Iron compounds
- The development of electrocatalysts from inexpensive, natural sources has been an attractive subject owing to economic, environmental, sustainable, and social merits. Herein, Fe-treated heteroatoms (N, P, and S)-doped porous carbons are synthesized for the first time by pyrolysis of bio-char derived from abundant human urine waste as a single precursor for carbon and heteroatoms, using iron(III) acetylacetonate as an external Fe precursor, followed by acid leaching and activation with a second pyrolysis step in NH3. In particular, the sample prepared at a pyrolysis temperature of 800°C (FeP-NSC-800) contains iron phosphide (FeP, Fe2P) in the high-porosity heteroatoms-doped carbon framework along with Fe traces, and exhibits excellent oxygen reduction reaction (ORR) activity and stability in both alkaline and acidic electrolytes as demonstrated in half- and single-cell tests. Such excellent ORR catalytic performance is ascribed to a synergistic effect of not only multiple active Fe-P, Fe-N, and pyridinic and graphitic N species in the electrocatalyst but also facile transport channels provided by its hierarchical porous structure with micro-/mesopores. In addition, the sample exhibits high long-term durability and methanol crossover resistance. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
- Wiley-VCH Verlag
- Related Researcher
Light, Salts and Water Research Group
Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
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- Department of Energy Science and EngineeringLight, Salts and Water Research Group1. Journal Articles
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