中文摘要：

它高度在可更新的精力技术为两氧减小反应(ORR ) 和氧进化反应(OER ) 为有效 bifunctional electrocatalyst 的发展被需要。在这个工作，钴， nitrogen-codoped 碳被一个灵巧的一步舞方法准备并且示威了经由一个完全的四电子的过程为 ORR 和 OER 展出好 electrocatalytic 性能。而且，催化剂在 900 点准备了 ?跱踁 吗？？

英文摘要：

It is highly desired for the development of efficient bifunctional electrocatalyst for both oxygen reduction reaction （ORR） and oxygen evolution reaction （OER） in renewable energy technologies. In this work, cobalt, nitrogen-codoped carbon was prepared by a facile one-step method and demonstrated to exhibit good elec- trocatalytic performance for ORR and OER via a complete four-electron process. Besides, the catalyst prepared at 900 ℃ also displayed excellent stability for both ORR and OER. Furthermore, the origin of catalytic activity was also explored, which was attributed to the synergistic effects of metallic Co and quaternary N.