金/碳化钨-活性炭催化剂对氧还原的电催化性能和抗甲酸能力

The Electrocatalytic Activity of Gold / Tungsten Carbide XC Catalyst for the Oxygen Reduction and Its Formic Acid Tolerance Ability

通过聚乙烯醇(PVA)保护法制备了Valcan XC-72活性炭(XC)载Au(Au/XC)及碳化钨(WC)和XC载Au(Au/WC-XC)催化剂,并研究了它们对氧还原的电催化性能和抗甲酸的能力。发现Au/WC-XC催化剂对氧还原的电催化性能远高于Au/XC催化剂,而且甲酸的存在未使Au/WC-XC催化剂对氧还原的电催化性能产生影响,说明Au/WC-XC催化剂有很好的抗甲酸能力。表明Au/WC-XC催化剂适合作为直接甲酸燃料电池的阴极催化剂。

The gold/active carbon （Au/XC） and gold/tungsten carbide XC （Au/WC-XC） catalysts were prepared with the polyvinyl alcohol（PVA） protection method and their electrocatalytic activity for the oxygen reduction and formic acid tolerance ability were investigated. It was found that the electrocatalytic activity of the Au/WC-XC catalyst for the oxygen reduction is much better than that of the Au/XC catalyst. In addition, the Au/WC-XC catalyst has a high formic acid tolerance ability. Thus, the Au/WC-XC catalyst is suitable to be used as the cathodic catalyst in direct formic acid fuel cell.