High-Performance Non-Noble Electrocatalysts for Oxygen Reduction Using Fluidic Acrylonitrile Telomer as Precursor

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• 作者：Fei Hong^a ; ^b ; ¹ ; Jinxin Liu^a ; ¹ ; Minsui Xie^a ; Yuanqin Chang^a ; Chuanxin He^a ; ^{hecx@szu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Qianling Zhang^a ; Hanben Niu^b ; Jianhong Liu^a ; ^{liujh@szu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Fluidic acrylonitrile telomer ; Dual-doped ; Cobalt ; Electrocatalyst ; Oxygen reduction reaction (ORR)
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：1 September 2016
• 年：2016
• 卷：211
• 期：Complete
• 页码：814-821
• 全文大小：2484 K

文摘

Non-noble-metal catalysts have shown promising oxygen reduction reaction (ORR) activity in proton exchange membrane fuel cells (PEMFCs). Herein, by using sulfur-terminated fluidic acrylonitrile telomere (ANT) as precursor, an N and S dual-doped Co/ANT/C catalyst was prepared via a facile heat treatment of the mixture of Co salt, ANT and carbon black, in which cobalt salt was uniformly-dispersed and interacted with ANT. As such, the increasing contact area between ANT and cobalt salt leads to a highly catalytic activity toward oxygen reduction reaction. Most importantly, by using ANT as precursor, the catalyst showed a remarkable improvement in the onset potential and current density as compared with those prepared from pure carbon black, cobalt salt/C or catalyst using high molecular weight polyacrylonitrile as precursor. Besides, the as-made Co/ANT/C catalyst demonstrated a comparable catalytic activity with commercial expensive Pt/C at high loading. In addition, the catalyst participated promotes a direct four-electron reduction of O₂ to H₂O and long term operation stability in an alkaline medium. Owing to its superb ORR performance, low cost and facile synthesis approach, such prepared Co/ANT/C catalyst has great potential applications in PEMFCs.