【摘要】 以松木碳为载体，水合肼为还原剂，采用化学还原沉积法制备了Ｐｔ－Ｍｎ／Ｃ催化剂。通过涂敷和热压制得Ｐｔ－Ｍｎ／Ｃ－Ｎａｆｉｏｎ膜氧阴极。采用电流—电位极化和恒电流放电法研究了Ｐｔ－Ｍｎ／Ｃ－Ｎａｆｉｏｎ膜氧阴极的性能。与我们以前报导的Ｐｔ／Ｃ和Ｐｔ－Ｃｒ／Ｃ催化剂比较，Ｐｔ－Ｍｎ／Ｃ催化剂对氧的电还原显示出更高的活性。考察了Ｍｎ含量对电极性能的影响。另外，Ｐｔ－Ｍｎ／Ｃ催化剂经热处理后性能有较大的提高。ＸＲＤ分析的结果表明，热处理催化剂活性的提高看来主要是由晶格结构改变的结果引起的。更多还原

【Abstract】 Using pine carbon as support and hydrazine hydrate as reducing agent,various Pt-Mn/C catalysts were prepared by chemical reduction deposition.Pt-Mn/C-Nafion membrane oxygen cathodes were obtained by brushing and hot-pressing.Performances of the Pt-Mn/C-Nafion membrane oxygen cathodes were studied by current-potential polarization and galvanostatic discharge.Compared with Pt/C and Pt-Cr/C catalysts which were reported,Pt-Mn/C catalysts exhibited higher activity for the electroreduction of oxygen.The influence of Mn content on the performances of oxygen cathode was studied.The activity of Pt-Mn/C catalysts was improved by heat-treating.The results of XRD analysis showed that the enhanced activity of heat-treated catalysts appeared to originate primarily as a result of the change in the lattice structure.更多还原