Cu-N共掺杂碳基催化剂的制备及其氧还原性能

Preparation and Oxygen Reduction Properties of Cu-N Co-doped Carbon-Based Catalysts

为了解决燃料电池阴极催化剂价格昂贵、稳定性差等问题,使用α-亚硝基-β-萘酚铜、三聚氰胺和导电碳黑通过简单的热处理制备Cu、N共掺杂的碳基催化剂(Cu-N-KB)。表征结果证实Cu、N均匀分布在碳载体中,其中铜以晶态铜粒子和非晶态的Cu-Nx两种方式存在,该催化剂高的比表面积与介孔结构确保了其大量的活性位点和快速的传质效率。该催化剂在碱性介质中表现出比商业Pt/C催化剂优异的氧还原催化性、抗甲醇性和稳定性。

In order to solve the problems of high cost and poor stability of fuel cell cathode catalysts,Cu,N co-doped carbon based catalyst(Cu-N-KB)was prepared by simple heat treatment usingα-nitroso-β-naphthol copper,melamine and conductive carbon black.The characterization results show that Cu and N are uniformly distributed in the carbon support and the copper exists in the form of crystalline copper particles and amorphous Cu-Nx.The high specific surface area and mesoporous structure of the catalyst ensure a large number of active sites and fast mass transfer efficiency.The catalyst exhibits excellent oxygen reduction catalysis,methanol resistance and stability in an alkaline medium compared to commercial Pt/C catalysts.