Fabrication of a nitrogen-doped carbon catalyst from a precursor polymer using the electron beam irradiation technique
Fabrication of a nitrogen-doped carbon catalyst from a precursor polymer using the electron beam irradiation technique
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DOI：
10.7567/1347-4065/ab049e
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发表时间：
2019-05
影响因子：
1.5
通讯作者：
A. Idesaki;Y. Kanuma;S. Yamamoto;M. Sugimoto;Y. Maekawa;T. Yamaki
中科院分区：
文献类型：
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作者：
A. Idesaki;Y. Kanuma;S. Yamamoto;M. Sugimoto;Y. Maekawa;T. Yamaki
研究了利用高能电子束辐照技术从前驱体聚合物制备氮掺杂碳催化剂的新工艺，目的是在热非平衡条件下同时形成石墨纳米结构和氮掺杂。将酚醛树脂和氯化钴的共混物在流动的氨气下用2 MeV的电子管辐照，加热到800℃。结果表明，与普通电炉热处理相比，EB辐照制得石墨相含量高的碳材料，并增加了n掺杂量，尤其是吡啶- n掺杂量。所得碳材料在0.5 M H2SO4中表现出氧还原反应（ORR）的催化活性，相对于RHE的ORR电位为0.7 V，电子转移数为3。
A novel process for fabricating a nitrogen-doped carbon catalyst from a precursor polymer utilizing the high-energy electron beam (EB) irradiation technique was examined with the aim of simultaneously forming a graphitic nanostructure and nitrogen doping in thermally non-equilibrium conditions. A blend of phenolic resin and cobalt chloride was irradiated by a 2 MeV EB under flowing ammonia gas and heated up to 800 °C. It was found that the EB irradiation produces carbon material with a high content of the graphite phase and enhances the amount of N-doping, especially pyridinic-N, compared with the common heat treatment in an electric furnace. The obtained carbon material exhibited catalytic activity for oxygen reduction reaction (ORR) with an ORR potential of 0.7 V versus RHE and an electron transfer number of 3 in 0.5 M H2SO4.