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阴极催化剂是影响微生物燃料电池(microbial fuel cell,MFC)性能的关键要素.为了考察不同羧基化方法改性的碳纳米管(carbon nanotube,CNT)负载Pt的催化氧还原效率,分别在80℃和95℃条件下对CNT进行了羧基化,采用浸渍-沉淀法制备了Pt/CNT催化剂(Pt/CNT-80和Pt/CNT-95),并在空气阴极MFC体系中验证了其催化氧还原效果(MFC-80、MFC-95和MFC-C).结果表明,MFC-95和MFC-80的最大功率密度分别为568.8 mW.m-2和412.8 mW.m-2,内阻分别为204.7Ω和207.7Ω,开路电压分别为0.719 V和0.651 V.而对照MFC-C的最大功率密度仅为5.4 mW.m-2,内阻为826.2Ω.XPS和XRD分析结果显示,Pt/CNT-95催化氧还原效果优于Pt/CNT-80,原因可能是95℃羧基化过程在CNT表面引入了丰富的含氧基团.
Cathode catalyst is a key factor that affects the performance of microbial fuel cell (MFC) .In order to investigate the catalytic oxygen reduction efficiency of Pt loaded with different carbonylation methods modified carbon nanotubes (CNTs), respectively, at 80 ℃ and The CNTs were carboxylated at 95 ℃. The Pt / CNT catalysts (Pt / CNT-80 and Pt / CNT-95) were prepared by impregnation-precipitation method and their catalytic oxygen reduction effect was verified in air cathode MFC system (MFC-80, MFC-95 and MFC-C). The results showed that the maximum power density of MFC-95 and MFC-80 were 568.8 mW.m-2 and 412.8 mW.m- And 207.7Ω, the open-circuit voltage was 0.719 V and 0.651 V. The maximum power density of control MFC-C was only 5.4 mW.m-2, the internal resistance was 826.2Ω.XPS and XRD analysis showed that Pt / CNT-95 Catalytic reduction of oxygen is superior to that of Pt / CNT-80, probably due to the introduction of rich oxygen-containing groups on the surface of the CNTs by the carboxylation of 95 ℃.