Department of Chemistry, Fudan University , Shanghai 200433, P. R. China.
Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University , Shanghai 200433, P. R. China.
ACS Appl Mater Interfaces. 2017 Feb 8;9(5):4643-4648. doi: 10.1021/acsami.6b14732. Epub 2017 Jan 24.
Graphene, the sp carbonaceous two-dimensional (2D) material, is gaining more attention in recent electrochemical studies. However, this atomic thick electrode usually suffers with surface contamination and poor electrochemical endurance. To overcome the drawbacks, we developed a PMMA-assisted, flipped transfer method to fabricate the graphene electrode with pristine surface and prolonged lifetime in hydrogen evolution reaction (HER). The HER performances of the single-layer graphene (SLG) were evaluated on various insulating and conductive substrates, including SiO, polymers, SLG, highly oriented pyrolytic graphite (HOPG), and copper. The parallel Tafel slopes of SLG, bilayer graphene (BLG), and HOPG suggest they share the same electrochemical activities deriving from the sp carbon basal plane. Moreover, the atomic barriers, both for SLG and the single-layer h-BN (SLBN), are semitransparent in HER for the underneath copper, providing a new perspective for the 2D materials to protect and couple with the other electrochemical catalysts.
石墨烯，sp 杂化的二维（2D）材料，在最近的电化学研究中受到越来越多的关注。然而，这种原子级厚的电极通常会受到表面污染和较差的电化学耐久性的影响。为了克服这些缺点，我们开发了一种 PMMA 辅助的翻转转移方法，制备具有原始表面和延长氢析出反应（HER）寿命的石墨烯电极。在各种绝缘和导电衬底上评估了单层石墨烯（SLG）的 HER 性能，包括 SiO2、聚合物、SLG、高取向热解石墨（HOPG）和铜。SLG、双层石墨烯（BLG）和 HOPG 的平行塔菲尔斜率表明它们具有相同的电化学活性，源自 sp 碳基面。此外，对于 SLG 和单层 h-BN（SLBN），原子势垒在 HER 中对于下方的铜都是半透明的，为 2D 材料提供了一个新的视角，以保护和与其他电化学催化剂耦合。
