A N-doped rice husk-based porous carbon (N-RHPC) was cost-effectively prepared by simply treating RHPC at high temperature in an ammonia atmosphere. Results show that the mesopore volume and degree of graphitization of N-RHPC are significantly increased by the treatment. N atoms are doped in the RHPC structure in the form of pyridinic N (398.5 ± 0.1 eV), pyridonic N (399.3 ± 0.1 eV), and graphitic N groups (401.1 ± 0.1 eV) and N-oxide (401.8 ± 0.1 eV). Compared with a commercial Pt/C catalyst, the N-RHPC as an oxygen reduction electrocatalyst has a similar electrocatalytic activity, and better sTableility and methanol toxicity resistance. This excellent performance is ascribed to the increased number of catalytic sites afforded by the nitrogen species, the improved degree of graphitization that increases electron transfer, and the unique pore structure with macropores, mesopores and micropores for fast ion transport.

通过简单地在氨气氛中于高温下对RHPC进行处理，可以经济高效地制备N掺杂的稻壳基多孔碳（N-RHPC）。结果显示，通过处理，N-RHPC的中孔体积和石墨化程度显着增加。以吡啶N（398.5±0.1 eV），吡啶N（399.3±0.1 eV）和石墨N基团（401.1±0.1 eV）和N-氧化物（401.8±0.1 eV）的形式在RHPC结构中掺杂N原子。与市售Pt / C催化剂相比，N-RHPC作为氧还原电催化剂具有相似的电催化活性，并且具有更好的稳定性和抗甲醇毒性。这种优异的性能归因于氮物质提供的催化位点数量增加，石墨化程度提高，从而增加了电子转移，