The Study on ORR Catalyst Preparaed with Ammonia Hydrothermal Method

• 1、Chongqing University, College of Chemistry and Chemical Engineering, Chongqing 400044
• 2、Chongqing University, College of Chemistry and Chemical Engineering, Chongqing 400044

Abstract：In this paper, the widely used Vulcan XC-72 was used as carbon source, NH3oH2O and CoCl2o6H2O were used as nitrogen source and transition metal source. A series of TM-N/C catalysts were synthesized by an innovative direct chemical reduction combine ammonia hydrothermal method. The effects of preparation conditions on catalyst performance were discussed. LSV was used to evaluate the activity of prepared TM-N/C catalysts and compare it with commercial Pt/C. Experimental result shows that it's effective to dope nitrogen into carbon material using NH3oH2O as nitrogen source under hydrothermal conditions. The participation of transition metal and pre-oxidation of carbon carrier play a very important role in improving the performance of catalysts. The optimal preparation conditions for the hydrothermal reaction is 180℃, 9h. The peak potential of prepared catalysts is approaching to commercial Pt/C catalyst.

Keywords： Electrocatalyst Oxygen reduction reaction hydrothermal dope nitrogen direct chemical reduction