Non-precious metal hybrid hydrochar from hydrothermal carbonization for high level electrochemical performance for the oxygen reduction reaction
발표자
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초록
내용
Non-precious metals and carbon materials show synergistic effects and show good performance for oxygen reduction reactions. The N-doped porous hydrochar(N-HTC) were firstly synthesized from a hydrothermal reaction of bio sources followed by a pyrolysis with nitrogen sources. Iron nanoparticles are produced between the pores of the resulting product. (Fe@N-HTC) The morphology of carbon encapsulated iron nanoparticles is confirmed by FE-SEM and HR-TEM. XPS, XRD and Raman spectroscopy is conducted to confirm the carbon graphite character in carbon materials and the formation of capsulated iron nanoparticles. To calculate specific surface area, BET analysis is applied cased on nitrogen adsorption/desorption. The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activities of Fe@N-HTC nanospheres are investigated using a rotating disk electrode. The Fe@N-HTC show comparable electrochemical performance to platinum-based catalysts (Pt/C) and IrO2.