Electrocatalytic activity of non-precious metal catalyst Co-N/C toward oxygen reduction reaction

• 出 处: Chinese Chemical Letters
• 发表日期: 2010年08期
• 关键词: precious toward cobalt acetylene synthesize sweep treating substituted acetone d

Metallic cobalt was deposited on acetylene black to synthesize a composite Co/C by chemical reduction method.A platinumfree electrocatalyst Co-N/C(800) for oxygen reduction reaction(ORR) was synthesized by mixing the composite Co/C with urea and heat-treating at 800℃.The results from linear sweep voltammograms indicated that the Co-N/C(800) is active to ORR.Theβ-Co and cobalt oxides are not the active site of the catalyst Co-N/C.However,the existence of cobalt facilitated the modification of nitrogen to carbon black and led to the formation of active site of catalyst Co-N/C(800).

Metallic cobalt was deposited on acetylene black to synthesize a composite Co / C by chemical reduction method. A platinumfree electrocatalyst Co-N / C (800) for oxygen reduction reaction (ORR) was synthesized by mixing the composite Co / C with urea and heat -treating at 800 ° C. The results from linear sweep voltammograms indicated that the Co-N / C (800) is active to ORR.Theβ-Co and cobalt oxides are not the active site of the catalyst Co-N / C. However, the existence of cobalt facilitated the modification of nitrogen to carbon black and led to the formation of active site of catalyst Co-N / C (800).