Platinum Electrodeposition on Conductive Diamond Powder and Its Application to Methanol Oxidation in Acidic Media
Platinum Electrodeposition on Conductive Diamond Powder and Its Application to Methanol Oxidation in Acidic Media
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DOI：
10.1149/1.2830857
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发表时间：
2008-03
影响因子：
3.9
通讯作者：
N. Spătaru;Xintong Zhang;Tanţa Spătaru;D. Tryk;A. Fujishima
中科院分区：
文献类型：
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作者：
N. Spătaru;Xintong Zhang;Tanţa Spătaru;D. Tryk;A. Fujishima
掺硼金刚石（BDD）粉末被证明是一种可能的替代碳作为燃料电池电催化剂，如铂的载体材料。采用电化学沉积法制备了Pt/BDD粉末电催化剂，并与Pt/石墨粉末电催化剂的电化学行为进行了比较。电极的制备通过涂覆多晶BDD膜与这些电催化剂，与Nafion溶液作为粘合剂，和甲醇氧化的活动被发现是可比的。BDD的使用导致催化剂在严格的阳极条件下的高得多的稳定性。稳态和长时间的甲醇氧化极化测量，在“浮动电极”配置在酸性介质中进行，表明铂BDD粉末是不太敏感的失活，大概是由于CO中毒，比铂石墨粉。
Boron-doped diamond (BDD) powder is shown to be a possible alternative to carbon as a support material for fuel cell electro-catalysts such as platinum. In this work, a Pt/BDD powder electrocatalyst was prepared via electrochemical deposition of platinum, and the electrochemical behavior was compared with that for Pt/graphite powder. Electrodes were prepared by coating polycrystalline BDD films with these electrocatalysts, with Nafion solution as a binder, and the activities for methanol oxidation were found to be comparable. The use of BDD resulted in a much higher stability of the catalyst under severe anodic conditions. Steady-state and long-time methanol oxidation polarization measurements, performed in the "floating electrode" configuration in acidic media, showed that platinum on BDD powder was less sensitive to deactivation, presumably due to CO poisoning, than was platinum on graphite powder.