Ni-Pd纳米粒子/石墨烯制备及电催化性

Preparation of Bimetallic Ni-Pd Nanoparticles Supported on Reduced Graphene Oxide and its Electrocatalysis Investigation

为了提高Pd催化剂粒子的利用率,通过两步法制备出Ni Pd-RGO复合材料,双金属镍(Ni)钯(Pd)纳米粒子在还原氧化石墨烯(RGO)纳米片上均匀分布。在油浴180℃的条件下,使用还原剂乙二醇,首先形成的Ni纳米粒子被用作随后Pd生长的晶种。双金属纳米粒子的平均尺寸为5.5nm,Pd添加到Ni纳米粒子的一边形成镍钯双金属界面。在相同的负载量下和商业钯黑作比较,该复合材料具有较高的电催化活性、较好的电化学稳定性和较高的抵抗一氧化碳中毒的能力。

Ni Pd-RGO composites were prepared via a two-step method through the growth of uniformly dispersed bimetallic nickel-palladium nanoparticles（ NPs） on reduced graphene oxide（ RGO） nanosheets. The first formed Ni NPs were used as seeds for the subsequent growth of Pd. The formation of Ni NPs on RGO was performed by an in-situ reduction reaction with the reducer ethylene glycol under the condition of oil bath at180℃. NPs in the as-prepared Ni Pd-RGO had an average particle size of 5. 5 nm,and Pd was added to one side of Ni NPs to form Ni-Pd bimetallic interfaces. The composites had higher electro-catalytic activity,better electrochemical stability and higher resistance to CO poisoning than those of the commercial Pd black at the same loading.