标题： 普鲁士蓝修饰的还原氧化石墨烯作为铂纳米颗粒的载体：酸性介质中氧气电还原高效催化剂的发展 显示英文标题

标题： Prussian Blue Modified Reduced Graphene Oxide as Support for Pt Nanoparticles: Development of Efficient Catalysts for Oxygen Electroreduction in Acid Medium

摘要： 铂电催化纳米颗粒被沉积在由还原氧化石墨烯(rGO)-过渡金属六氰铁酸盐(普鲁士蓝-PB)组成的混合载体上，并在酸性溶液中的氧还原反应中研究了该系统的电化学活性。利用普鲁士蓝和含铂纳米颗粒的材料通过透射电子显微镜、X射线衍射和电化学诊断技术如循环伏安法和旋转环盘伏安法进行了表征。将修饰有普鲁士蓝的rGO载体作为铂催化中心的基质(支持物)应用时，相对于类似的无PB系统，在0.5 mol dm-3硫酸中氧的电还原电位几乎没有变化(在旋转盘伏安测量条件下)。更重要的是，由于多核氰铁酸盐修饰剂的存在，不利的过氧化氢中间体的量显著减少(在旋转环盘伏安法的环上)。结果与双功能机理一致，其中氧还原在铂中心开始，过氧化氢中间体在反应性PB修饰的rGO支持物上被还原分解。 显示英文摘要

摘要： Pt electrocatalytic nanoparticles were deposited onto hybrid carriers composed of reduced graphene oxide (rGO)-transition metal hexacyanoferrate (Prussian Blue-PB) and the resulting system's electrochemical activity was investigated during oxygen reduction reaction in acidic solution. The Prussian Blue -utilizing and Pt nanoparticle-containing materials were characterized using transmission electron microscopy, X-ray diffraction and electrochemical diagnostic techniques such as cyclic voltammetry and rotating ring-disk voltammetry. Application of rGO carriers modified with Prussian Blue as matrices (supports) for Pt catalytic centers does not change practically the potential of electroreduction of oxygen in 0.5 mol dm-3 H2SO4 (under rotating disk voltammetric conditions) relative to the behavior of the analogous PB-free system. What is even more important that, due to the presence of the polynuclear cyanoferrate modifier, the amounts of the undesirable hydrogen peroxide intermediate are significantly decreased (at ring in the rotating ring-disk voltammetry). The results are consistent with the bifunctional mechanism in which oxygen reduction is initiated at Pt centers and the hydrogen peroxide intermediate is reductively decomposed at reactive PB-modified rGO supports.