基于明胶的掺氮石墨烯/碳基氧气还原催化剂的研究

Study on Gelatin-Based Nitrogen-Doped Graphene/Carbon Based Oxygen Reduction Catalyst

摘要: 以氧化石墨烯、明胶为原料，经冷冻干燥及高温碳化之后，得到了从明胶中得到的掺杂氮的碳片层包裹氧化石墨烯的新型催化剂。利用扫描电镜(SEM)、透射电镜(TEM)、X-射线衍射仪(XRD)和旋转环盘电极(RRDE)表征了化合物的物理特性和氧气还原反应的催化性能。在氧气饱和的0.10 mol/L KOH电解液中，该化合物对氧还原反应(ORR)表现出明显的电催化性能，起始电压为−0.11 V (vs. NHE)，在燃料电池和金属空气电池领域有潜在应用前景。   The nitrogen doped graphene/carbon based oxygen reduction catalyst has been synthesized by freeze-drying and high temperature carbonization of graphene oxide and gelatin. The physical properties and the catalytic performances of oxygen reduction reaction of the compound are evaluated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and rotating ring disc electrode techniques. The compound exhibits great catalytic activity towards oxygen reduction reaction (ORR) with a stating voltage of −0.11 V (vs. RHE) in O2-saturated 0.10 mol/L KOH electrolyte. The catalyst has potential appliance in the field of fuel cell and metal air battery.