S- and N-doped graphene-based catalysts for the oxygen evolution reaction
S- and N-doped graphene-based catalysts for the oxygen evolution reaction
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DOI：
10.1016/j.electacta.2020.135975
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发表时间：
2020-04-20
影响因子：
6.6
通讯作者：
Garcia, G.
中科院分区：
文献类型：
--
作者：
Rivera-Gavidia, L. M.;Luis-Sunga, M.;Garcia, G.
采用原位拉曼光谱、旋转环盘电极（RRDE）、循环伏安法（CV）和线性扫描伏安法（LSV）等技术测定了石墨和杂原子掺杂石墨烯催化剂在碱性介质中对析氧反应（OER）的催化活性。主要结果表明，OER除与电解质介质的相互作用外，还受掺杂剂的性质和用量的强烈影响，这也决定了面积(D)/面积(G) (A（D)/A(G)）比以及D和G波段的位置。此外，粉末材料和催化剂油墨在空气，水和氢氧化钠的存在详尽的拉曼表征报告。最后，用一种新的方法估计了分子氧生成的百分比。这项工作不是为了揭示最佳的OER催化剂，而是为了展示研究石墨烯基催化剂OER的新技术。(C) 2020 Elsevier Ltd.版权所有。
In-situ Raman spectroscopy, rotating ring-disk electrode (RRDE), cyclic voltammetry (CV) and linear sweep voltammetry (LSV) techniques were used to determine the catalytic activity of graphite and heteroatom-doped graphene catalysts toward the oxygen evolution reaction (OER) in alkaline media. Main results indicate that the OER is strongly influenced by the nature and amount of the doping agent in addition to the interaction with the electrolyte media, which also conditioned the Area(D)/Area(G) (A(D)/A(G)) ratio and the position of the D- and G-bands. Additionally, an exhaustive Raman characterization of powder materials and catalyst inks in the presence of air, water and sodium hydroxide is reported. Finally, the percentage of molecular oxygen production is estimated by a novel procedure. This work is not intended to reveal the best catalysts toward the OER, but to show novel techniques to study the OER at graphene-based catalysts. (C) 2020 Elsevier Ltd. All rights reserved.