Yamazaki Kaoru, Goto Shunsuke, Yoshino Shunya, Gubarevich Anna, Yoshida Katsumi, Kato Hideki, Yamamoto Masanori
RIKEN Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba, Sendai 980-8577, Japan.
Phys Chem Chem Phys. 2023 Dec 13;25(48):32972-32978. doi: 10.1039/d3cp04921c.
Nanoporous graphene (NPG) materials have the pronounced electrochemical stability of the seamless graphene structures developed over the 3D space. We revisited the Raman spectra of nanoporous carbons (NPCs) synthesized using θ-/γ-AlO templates and NPGs converted from NPCs by annealing at 1800 °C to identify the type and density of defects. We found that both the NPCs and NPGs mostly consist of single-layered graphene with a few single vacancies and Stone-Wales defects. The density of vacancy defect per hexagon in the graphene sheet is estimated to be 10 for NPCs, while the annealing reduced the value to 10-10 for NPGs. This supports the outstanding chemical and electrochemical stability of the novel porous carbon materials.
纳米多孔石墨烯（NPG）材料在三维空间中具有所形成的无缝石墨烯结构显著的电化学稳定性。我们重新审视了使用θ-/γ-氧化铝模板合成的纳米多孔碳（NPC）以及通过在1800°C退火由NPC转化而来的NPG的拉曼光谱，以确定缺陷的类型和密度。我们发现，NPC和NPG大多由具有一些单空位和斯通-威尔士缺陷的单层石墨烯组成。石墨烯片中每个六边形的空位缺陷密度估计对于NPC为10，而退火后NPG的值降至10-10。这支持了新型多孔碳材料出色的化学和电化学稳定性。
