Hemoglobin-carbon nanotube derived noble-metal-free Fe5C2-based catalyst for highly efficient oxygen reduction reaction.
作者： Varun Vij , Jitendra N. Tiwari , Wang-Geun Lee , Taeseung Yoon , Kwang S. Kim
DOI: 10.1038/SREP20132
关键词: Carbon nanotube 、 Catalysis 、 Electrochemistry 、 Noble metal 、 Materials science 、 Methanol 、 Chemical engineering 、 Carbon 、 Reversible hydrogen electrode 、 Proton exchange membrane fuel cell
摘要: High performance non-precious cathodic catalysts for oxygen reduction reaction (ORR) are vital the development of energy materials and devices. Here, we report an noble metal free, Fe5C2 nanoparticles-studded sp2 carbon supported mesoporous material (CNTHb-700) as catalyst ORR, which was prepared by pyrolizing hybrid adduct single walled nanotubes (CNT) lyophilized hemoglobin (Hb) at 700 °C. The shows onset potentials 0.92 V in 0.1 M HClO4 KOH good commercial Pt/C catalyst, giving very high current density 6.34 6.69 mA cm−2 0.55 V vs. reversible hydrogen electrode (RHE), respectively. This has been confirmed to follow 4-electron mechanism ORR electrochemical stability both acidic basic media. Catalyst CNTHb-700 possesses much higher tolerance towards methanol than catalyst. Highly efficient catalytic properties could lead fundamental understanding utilization biomolecules materialization proton exchange membrane fuel cells clean production.
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