Fe,N,P共掺杂碳纳米管的制备及催化性能研究

Preparation and catalytic properties of Fe,N,P co-doped CNTs

利用废旧磷酸铁锂电池回收得到的磷酸铁(FePO_(4))作为铁源和磷源,与多壁碳纳米管混合在氮气中进行热处理,得到Fe、N、P共掺杂碳基催化剂。结果表明:煅烧温度为800℃的碳基催化剂具有优异的阴极氧还原反应催化活性和稳定性,碱性电解质中其半波电位可达到0.86V,优于商用Pt/C催化剂(0.83V);旋转速率为1600r/min时极限电流密度为5.51mA/cm^(2);用作锌空气电池阴极催化剂时,在电流密度5mA/cm^(2)条件下充电、放电电压差可低至0.78V,最大功率密度达到137.4mW/cm^(2),优于Pt/C催化剂。

FePO_(4) recovered from spent lithium iron phosphate battery was used as the source of Fe and P.It was mixed with multi-walled carbon nanotubes(CNTs)and subjected to heat treatment in nitrogen to obtain a Fe,N,P co-doped catalyst.The results showed that the carbon-based catalyst annealed at 800℃ exhibited excellent ORR catalytic activity and stability.Its ORR half-wave potential in alkaline electrolyte could reach 0.86V,which was superior to that of commercial Pt/C catalyst(0.83V),and the limiting current density was 5.51mA/cm^(2) at a rotation rate of 1600r/min.When used as cathode catalyst of zinc-air battery,the charge and discharge voltage gap could be as low as 0.78V at a current density of 5 mA/cm^(2),and the maximum power density could reach 137.4mW/cm^(2),which was also better than that of Pt/C catalyst.