还原法制备Pd-Ni/C阳极催化剂及其性能研究

Performance of Anodic Pd-Ni/C Catalyst Prepared by Reduction

摘要:

本文利用不同的还原法，以预处理的活性炭为载体、二氧化铈为修饰剂和NaBH4为还原剂成功地制备出Pd2Ni3/C、PdcoreNishell/C、NicorePdshell/C三种不同结构碱性燃料电池阳极催化剂。通过物理表征及电化学性能测试，发现NicorePdshell/C催化剂中Pd负载量较高，分散均匀，颗粒较小，在碱性环境下表现更好的乙醇催化氧化活性和稳定性，在扫描速度为100mV/s 的情况下，最高电流密度达到160mA穋m-2，在-0.5V 条件下，电流密度的稳定性均优于Pd2Ni3/C和PdcoreNishell/C催化剂。

Abstract:

Three types of alkaline fuel cell catalysts(Pd2Ni3/C、PdcoreNishell/C、NicorePdshell/C) with different structures have been prepared by reduction, using pretreated active carbon as the support, CeO2 as the decorator and NaBH4 as the reducing agent. According to physical characterization and electrochemistry test, NicorePdshell/C catalyst has better catalytic oxidation activity of ethanol and stability under the alkaline medium. The highest current density was 160mA穋m-2 in NicorePdshell/C with 100mV/s of sweep speed, and its stable current density was higher than Pd2Ni3/C and PdcoreNishell/C catalysts.