Citation:
	            
		            Hui  Wu, Tao  Peng, Zongkui  Kou, Jian  Zhang, Kun  Cheng, Daping  He, Mu  Pan, Shichun  Mu. Core-shell graphene@amorphous carbon composites supported platinum catalysts for oxygen reduction reaction[J]. Chinese Journal of Catalysis,
							;2015, 36(4): 490-495.
						
							doi:
								10.1016/S1872-2067(14)60211-4
						
					
				
					
				
	        
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	                	A core-shell graphene nanosheets (GNS) and amorphous carbon composite (GNS@a-C) was prepared 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 resistance, 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.
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