摘要
Fe-N-C材料被认为是最有潜力替代贵金属Pt催化剂用于催化燃料电池阴极氧还原反应(Oxygen Reduction Reaction,ORR)的廉价非贵金属催化剂之一。本文以碱式碳酸锌(BZC)、法桐树叶(FT)、氯化铁和碳酸钾分别为反应性硬模板、碳氮前驱体、金属前驱体和激活剂,通过固相研磨法和高温热处理制备了生物质基Fe-N-C材料(FT-Fe-N-C(BZC))并考察了其在0.1M KOH溶液中对ORR的电催化性能。结果显示,其起始电势(Eonset)、半波电势(E1/2)和极限电流密度分别达到0.93V、0.81V和4.02mA·cm^(-2),且展示出高效的4电子ORR过程选择性;另外,在制备过程中引入过硫酸铵(AP),获得的FT-Fe-N-C(BZC/AP)催化ORR在维持4电子反应途径同时,其E_(onset)和E_(1/2)都提升了30mV,与商业Pt/C催化剂相当。
Fe-N-C materials are considered to be one of the most potential non-precious metal catalysts that can substitute the costly Pt catalysts for cathodic oxygen reduction reaction(ORR) in fuel cells.In this paper,biomass-based Fe-N-C materials(FT-Fe-N-C(BZC)) were prepared by solid phase grinding method and pyrolysis using basic zinc carbonate(BZC),Fatong leaves,ferric chloride and potassium carbonate as the reactive hard template,carbon/nitrogen precursor,metal source and activator and its electrocatalytic performances for ORR in 0.1 M KOH were investigated.The results show that electrocatalysis of ORR on the FT-Fe-N-C(BZC) proceeded mainly via an effective four-electron pathway with the initial potential(Eonset),half-wave potential(E1/2) and limiting current density being 0.93 V,0.81 V and 4.02 mA·cm^(-2),respectively.Moreover,after the introduction of ammonium persulfate(AP) during the preparation process,the as-obtained FT-Fe-N-C(BZC/AP) still catalyzed a four-electron ORR and both of its E_(onset) and E_(1/2)had a positive shift of 30 mV,which are comparable to those of commercial Pt/C catalyst.
作者
程卓
周鹏飞
马家乐
严祥辉
Cheng Zhuo;Zhou Pengfei;Ma Jiale;Yan Xianghui(School of Materials Science and Engineering,North Minzu University,Ningxia,750021)
出处
《当代化工研究》
2023年第3期52-54,共3页
Modern Chemical Research
基金
宁夏自治区人力资源和社会保障厅留学人员创新创业项目“氮掺杂多孔碳材料电催化氧气制备双氧水性能研究”(项目编号:宁人社函[2021]5号)
2021年北方民族大学国家级大学生创新项目“发泡法制备多孔Fe-N-C材料”(项目编号:G20211104700)。
