摘要
采用液相化学还原法制备了不同反应温度下单壁碳纳米管(SWCNTs)负载型的质子交换膜燃料电池阳极电催化剂PtRu/SWCNTs(Pt和Ru的质量分数分别为20%和10%)。对催化剂进行了XRD和TEM表征,并估算了催化剂上金属的粒径、晶格参数和比表面积。研究了阳极催化剂层中PtRu/SWCNTs催化剂用量、Nafion含量和PTFE含量对单电池性能的影响。结果表明,反应温度为60℃时,PtRu/SWCNTs催化剂具有较小的粒径和较大的比表面积。阳极催化层中催化剂最佳用量和Nafion与PTFE最佳含量分别为0.6 mgPt/cm2、7%和为5%。在阳极和阴极催化剂层中Pt用量均为0.6 mg.cm-2,甲醇浓度和流量分别为2.5 mol.L-1和0.6 mL.min-1,阴极氧化剂空气操作压力和温度分别为0.2 MPa和80℃,单电池开路电压为0.6 V左右的条件下,0.3 V和0.2 V时电流密度分别为72 mA.cm-2.mg-1Pt和120 mA.cm-2.mg-1Pt。
The liquid - phase chemical reduction method was used to prepare single wall carbon nanometer tube （SWCNTs） supported PtRu/SWCNTs（ Pt20% 和 Rul0% in mass fraction）catalysts. The catalysts were characterized by XRD TEM. The metal particle diameters,lattice parameters and specific areas of the catalysts PtRu/SWCNTs （60 ℃ ） were calculated by mathematical models respectively. The effects of the usage of catalyst, the Nation content and PTFE content on the single cell performance were sdudied. The experimental results showed that The catalyst PtRu/SWCNTs had smaller particle size and larger specific area when it was prepared at 60℃. The optimal usage of PtRu/SWCNTs and the optimal contents of Nation and PTFE in the anode catalyst layer were 0.6mg Pt · cm^-2 ,7% and 5% respectively. The current densities were 72 mA · cm ^-2 mg^-1 Pt and 120 mA · cm ^-2 mg^-1 Pt at 0. 3 V and 0. 2 V when the Pt usage was 0. 6mg · cm^ - 2 both in anode and cathode catalyst layers, the concentration and flow rate of methanol were 2.5 moL · L and 0. 6 mL · min^ - 1, the operation pressure and temperature of oxidant air in cathode were 0. 2 MPa and 80℃ and the open - circuit voltage of the single cell was 0. 6 V.
出处
《南昌大学学报（理科版）》
CAS
北大核心
2007年第4期387-390,395,共5页
Journal of Nanchang University(Natural Science)
基金
国家自然科学基金资助项目(20263003)
江西省科技攻关项目(2005年)
关键词
质子交换膜
燃料电池
催化剂
甲醇
碳纳米管
proton exchange membrane
full cell
catalyst
methanol
carbon nanometer tube
