Mazánek Vlastimil, Matějková Stanislava, Sedmidubský David, Pumera Martin, Sofer Zdeněk
Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28, Prague 6, Czech Republic.
Institute of Organic Chemistry and Biochemistry AS CR, v.v.i., Flemingovo nám. 2, 166 10, Praha 6, Czech Republic.
Chemistry. 2018 Jan 19;24(4):928-936. doi: 10.1002/chem.201704515. Epub 2017 Dec 13.
In the last decade, numerous studies of graphene doping by various metal and nonmetal elements have been done in order to obtain tailored properties, such as non-zero band gap, electrocatalytic activity, or controlled optical properties. From nonmetal elements, boron and nitrogen were the most studied dopants. Recently, it has been shown that in some cases the enhanced electrocatalytic activity of graphene and its derivatives can be attributed to metal impurities rather than to nonmetal elements. In this paper, we investigated the electrocatalytical properties of B/N co-doped graphene with respect to the content of metallic impurities introduced by the synthesis procedures. For this purpose, a permanganate (Hummers) and a chlorate (Hofmann) route were used for the preparation of the starting graphene oxides (GO). The GO used for the synthesis of B/N co-doped graphene had significantly difference compositions of oxygen functionalities as well as metallic impurities introduced by the different synthetic procedures. We performed a detailed structural and chemical analysis of the doped graphene samples to correlate their electrocatalytic activity with the concentration of incorporated boron and nitrogen as well as metallic impurities.
在过去十年中，为了获得定制的性能，如非零带隙、电催化活性或可控的光学性能，人们对各种金属和非金属元素掺杂石墨烯进行了大量研究。在非金属元素中，硼和氮是研究最多的掺杂剂。最近研究表明，在某些情况下，石墨烯及其衍生物增强的电催化活性可归因于金属杂质而非非金属元素。在本文中，我们研究了B/N共掺杂石墨烯的电催化性能与合成过程中引入的金属杂质含量之间的关系。为此，采用高锰酸盐（Hummers法）和氯酸盐（Hofmann法）路线制备起始氧化石墨烯（GO）。用于合成B/N共掺杂石墨烯的GO在氧官能团组成以及不同合成过程引入的金属杂质方面存在显著差异。我们对掺杂石墨烯样品进行了详细的结构和化学分析，以将其电催化活性与掺入的硼和氮以及金属杂质的浓度相关联。
