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赵东江,马松艳,尹鸽平.简单一步法合成Co9S8氧还原反应电催化剂[J].稀有金属材料与工程(英文),2017,46(12):3577~3582.[Zhao Dongjiang,Ma Songyan and Yin Geping.A Facile One-step Synthesis of Co9S8 Electrocatalyst for Oxygen Reduction Reaction[J].Rare Metal Materials and Engineering,2017,46(12):3577~3582.]
A Facile One-step Synthesis of Co9S8 Electrocatalyst for Oxygen Reduction Reaction
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Received:December 17, 2015  Revised:January 07, 2016
DOI:
Key words: oxygen reduction  non-noble metal catalyst  cobalt sulfide  polymer electrolyte membrane fuel cells
Foundation item:黑龙江省自然科学基金资助项目(B201423)
Author NameAffiliation
Zhao Dongjiang,Ma Songyan and Yin Geping  
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Abstract:
      A Co-based chalcogenide electrocatalyst has been synthesized by a facile one-step reaction of dodecacarbonyltetracobalt [Co4(CO)12] and elemental sulfur in 1, 6-hexanediol solvent under refluxing conditions. The characterizations of the synthesized compound are performed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD shows the formation of cubic structure Co9S8 and SEM micrograph displays cauliflower-like surface morphologies. The catalyst has an open circuit potential (OCP) of 0.75 V (vs. NHE) and shows a promising catalytic activity for the oxygen reduction. The transfer coefficient and Tafel slope are calculated to be 0.50 and 119 mV in the potential region limited by charge transfer kinetics, respectively. The catalytic activity and the electrochemical stability of the catalyst have also been compared with a commercial Pt catalyst.