Optimization of the sputter-deposited platinum cathode for a direct methanol fuel cell
Optimization of the sputter-deposited platinum cathode for a direct methanol fuel cell
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DOI：
10.1016/j.electacta.2005.04.062
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发表时间：
2005-11
影响因子：
6.6
通讯作者：
Koji Makino;K. Furukawa;K. Okajima;M. Sudoh
中科院分区：
文献类型：
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作者：
Koji Makino;K. Furukawa;K. Okajima;M. Sudoh
将溅射法制备的电极用作直接甲醇燃料电池（DMFC）的阴极。Pt负载量在0.25mgcm-2以下时，其质量活度高于常规方法制备的0.5mgcm-2的质量活度。然而，Pt负载量的增加降低了用于氧还原反应（ORR）的催化剂活性。该结果可能表明仅电化学非活性Pt增加。Pt的利用效率在Pt负载量为0.04mgcm−2时可高出约10倍。此外，添加Nafion的催化剂沉积的Pt阴极被发现有可能提高催化剂的ORR的活性，但过量的Nafion超过最佳条件减少了活性位点。
The electrodes prepared by a sputtering method were evaluated as the cathodes for direct methanol fuel cells (DMFCs). Pt loading below 0.25mgcm−2achieved higher mass activities than that of 0.5mgcm−2prepared by the paste method, which was general conventional method. However, an increase in Pt loading reduced the catalyst activity for the oxygen reduction reaction (ORR). This result may suggest an increase in only electrochemically inactive Pt. Pt utilization efficiency can be found about ten times higher at Pt loading of 0.04mgcm−2. Moreover, addition of Nafion to sputter-deposited Pt cathodes is found possible to improve the catalyst activity for the ORR, but the excess Nafion over the optimum condition reduces the active sites.