论文部分内容阅读
使用硼氢化钠共还原法制备40%(w)铂/石墨烯电催化剂用于氧还原反应.通过循环伏安测试发现,这种方法制备所得铂/石墨烯催化剂对氧还原反应活性较铂/碳催化剂差,但稳定性有所提高.在稳定性测试中,铂/石墨烯电催化性能衰减为50%,较铂/碳(79%)好.X射线衍射(XRD)和透射电子显微镜(TEM)表征发现在铂/石墨烯催化剂中两者存在明显交互作用,这可能是阻止石墨烯再堆垛和防止铂颗粒团聚的主要原因.通过对单电池性能测试也发现铂/石墨烯催化剂更有利于电池长期稳定.
40% (w) Pt / graphene electrocatalyst was prepared by the sodium borohydride co-reduction method for the oxygen reduction reaction.The cyclic voltammetry test found that the platinum / graphene catalyst obtained by this method has better oxygen reduction activity than the platinum / Carbon catalyst, but the stability is improved.In the stability test, the electrocatalytic performance of platinum / graphene is reduced by 50%, which is better than platinum / carbon (79%). X-ray diffraction (XRD) and transmission electron microscopy TEM) showed that there was a significant interaction between the two in the platinum / graphene catalyst, which may be the main reason to prevent graphene re-stacking and prevent agglomeration of platinum particles.By the single cell performance test also found that platinum / graphene catalyst more Is conducive to battery long-term stability.