کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1486870 | 1510691 | 2016 | 6 صفحه PDF | دانلود رایگان |
• The NDAC are synthesized by one-step pyrolyzing dopamine in N2 atmosphere.
• The NDAC-700 demonstrated a considerable positive onset potential toward ORR.
• The NDAC-700 has long-term stability and tolerance to methanol than Pt-C (20%).
Highly efficient metal-free catalysts to improve the performance of oxygen reduction reactions (ORR) have attracted significant attention. Here, nitrogen-doped amorphous carbon (NDAC) were synthesized with a one-step method that pyrolyzed dopamine in a N2 atmosphere at 700 °C, 800 °C, and 900 °C (NDAC-700, NDAC-800, and NDAC-900, respectively). The NDAC-700 demonstrates good catalytic activity with terrific positive onset potential (0.96 V VS RHE), which is close to Pt-C (1.0 V) (20%) toward ORR. Moreover, versus commercial Pt/C (20%) catalyst, it has better long-term operational stability and tolerance to methanol for ORR in alkaline solution. This exciting result increases the possibility of large-scale application of metal-free nanomaterials in fuel cells.
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Journal: Materials Research Bulletin - Volume 84, December 2016, Pages 118–123