应用于氧还原反应的石墨烯-无定形碳核壳结构复合材料载铂催化剂(英文)  

Core-shell graphene@amorphous carbon composites supported platinum catalysts for oxygen reduction reaction

作　　者：吴惠[1] 彭焘[1] 寇宗魁[1] 张建[1] 程坤[1] 何大平[1] 潘牧[1] 木士春[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,湖北武汉430070

出　　处：《催化学报》2015年第4期490-495,共6页

基　　金：supported by the National Natural Science Foundation of China (51372186);the National Basic Research Program of China (973 Program, 2012CB215504);the Natural Science Foundation of Hubei Province of China (2013CFA082)~~

摘　　要：采用氯化法制备石墨烯-无定型碳复合材料(GNS@a-C),并用作质子交换膜燃料电池(PEMFC)氧还原反应Pt催化剂的载体.结果显示,所制Pt/GNS@a-C催化剂与传统商业催化剂Pt/C相比,有较好的活性和较高的稳定性:质量活性(0.121 A/mg)几乎是Pt/C(0.064 A/mg)的两倍.更重要的是,该新型催化剂加速4000圈后其电化学活性面积保留了最初的51%,与Pt/C的33%相比,前者有更好的电化学稳定性,显示它在PEMFC中将具有较好的应用潜力.A core-shell graphene nanosheets（GNS） and amorphous carbon composite（GNS@a-C） was pre-pared by a chlorination method and used as a highly efficient catalyst support for oxygen reduction reaction. Herein, GNS as a shell, with excellent conductivity, high surface area, and corrosion re-sistance, served as a protecting coating to alleviate the degradation of amorphous carbon core. Platinum nanoparticles were homogeneously deposited on the carbon support（Pt/GNS@a-C） and showed a good catalytic activity and a higher electrochemical stability when compared with a commercial Pt/C catalyst. The mass activity of Pt/GNS@a-C catalyst was 0.121 A/mg, which was almost twice as high as that of Pt/C（0.064 A/mg）. Moreover, Pt/GNS@a-C retained 51% of its initial electrochemical specific area after 4000 operating cycles when compared with Pt/C（33%）. Thus, the prepared catalyst featured excellent electrochemical stability, showing promise for application in polymer electrolyte membrane fuel cells.

关 键 词：低温燃料电池 载体 核壳结构 氧还原反应 

分 类 号：O643.36[理学—物理化学] TM911.4[理学—化学]