Preparation and oxygen reduction activity of BN-doped carbons
Preparation and oxygen reduction activity of BN-doped carbons
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DOI：
10.1016/j.carbon.2007.04.031
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发表时间：
2007-08-01
期刊：
影响因子：
10.9
通讯作者：
Oya, Asao
中科院分区：
文献类型：
--
作者：
Ozaki, Jun-ichi;Kimura, Naofumi;Oya, Asao
通过碳化含有BF_3-MeOH络合物、三聚氰胺或两者的聚（糠醇）来制备B-、N-和BN-掺杂的碳。采用多种表征技术研究了碳材料在氧还原反应中电催化活性的控制因素。对所获得的XRD曲线的分析检查，例如Diamond和Hirsch方法，揭示了硼和氮的掺杂拓宽了石墨烯的尺寸分布;而它不影响石墨烯的堆叠方式。所有掺杂的碳都显示出导电性降低，其降低程度为原始碳的四分之一到百分之一。观察到掺杂碳的孔隙率的发展。BIs和N1s XPS分析表明BN掺杂碳中存在B-C键和B-N-C结构。通过由BET表面积归一化的ORR电流密度评估的氧还原活性对于B掺杂和N掺杂的碳增加4-5倍，而对于BN掺杂的碳达到20倍。发现制备的碳的ORR活性受边-N和B-N-C部分的存在控制，这通过XPS区分。(c)2007爱思唯尔有限公司保留所有权利。
B-, N- and BN-doped carbons were prepared by the carbonization of poly(furfuryl alcohol) containing either BF3-MeOH complex, melamine or both. Various characterization techniques were conducted in order to understand the controlling factors for the electrocatalytic activity of carbons for oxygen reduction reaction (ORR). Analytical inspections of the obtained XRD profiles, such as the Diamond and the Hirsch methods, revealed that the doping of boron and nitrogen broadened the graphene size distribution; while it did not influence the stacking manner of graphenes. All doped carbons showed reductions in electrical conductivity by the factors of a quarter to a hundredth of the pristine carbons. Development of porosity was observed for the doped carbons. BIs and N1s XPS analyses revealed the presences of B-C bonds and B-N-C moieties in the BN-doped carbons. The oxygen reductive activity, which was assessed by the ORR current density normalized by BET surface area, was increased by the factors of 4-5 for B-doped and N-doped carbons, while a factor of 20 was attained for the BN-doped carbons. The ORR activity of the prepared carbons was found to be controlled by the presence of both the edge-N and B-N-C moieties, which were distinguished by XPS. (c) 2007 Elsevier Ltd. All rights reserved.