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ÏëÎÊһϣ¬ÎÄÏ×ÖÐ1.¡°the decrease of the Pt/HCS electrode is much slower,
indicating that the mass transport on the Pt/HCS electrode is faster
than that on the Pt/C electrode. The results indicate that the oxidation
of methanol on the Pt/HCS electrode is controlled by activation
polarization at lower scan rates because the microporous structure
makes methanol able to access the active sites with ease.¡±   
2. ¡°This plot shows a straight line for the Pt/C electrode at all scan rates,
indicating a characteristic of concentration polarization.¡±
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