通过用2-氨基苯并咪唑配体热解ZIF可控合成Co@N掺杂碳以增强氧还原反应及其在锌空气电池中的应用
Controlled Synthesis of Co@N-Doped Carbon by Pyrolysis of ZIF with 2-Aminobenzimidazole Ligand for Enhancing Oxygen Reduction Reaction and the Application in Zn-Air Battery.
作者信息
Zhang Minghui, Zhang Erhuan, Hu Chunyan, Zhao Yong, Zhang Han-Ming, Zhang Yijie, Ji Muwei, Yu Jiali, Cong Guangtao, Liu Huichao, Zhang Jiatao, Zhu Caizhen, Xu Jian
机构信息
Institute of Low-Dimensional Materials Genome Initiative, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, P. R. China.
Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
出版信息
ACS Appl Mater Interfaces. 2020 Mar 11;12(10):11693-11701. doi: 10.1021/acsami.9b22476. Epub 2020 Feb 28.
The Co/N-doped carbon material, as an important electrocatalytic material, has been attracted intense interest in ORR and Zn-air battery. Here, we report an efficient Co@N-doped carbon catalyst (Co@N-C-1) obtained by pyrolysis of ZIF precursor with 2-aminobenzimidazole. The introduction of 2-aminobenzimidazole results in the formation of hierarchical meso/microporous structure of the as-prepared Co@N-C-1, effectively avoiding the aggregation of Co nanoparticles during pyrolysis and the higher N content, which contributes to enhance the ORR electrocatalytic activities. The obtained Co@N-C-1 exhibits remarkable ORR performance with a half-wave potential of 0.938 V vs RHE in alkaline media. As the air catalyst of zinc-air batteries, Co@N-C-1 displays 1.439 V of open-circuit voltage and 1413.3 Wh·kg of energy density.
作为一种重要的电催化材料，钴/氮掺杂碳材料在氧还原反应（ORR）和锌空气电池领域引起了广泛关注。在此，我们报道了一种通过对含2-氨基苯并咪唑的ZIF前驱体进行热解制备的高效钴@氮掺杂碳催化剂（Co@N-C-1）。2-氨基苯并咪唑的引入使得所制备的Co@N-C-1形成了分级介孔/微孔结构，有效避免了热解过程中钴纳米颗粒的聚集，且具有较高的氮含量，这有助于提高ORR电催化活性。所制备的Co@N-C-1在碱性介质中表现出优异的ORR性能，相对于可逆氢电极（RHE）的半波电位为0.938 V。作为锌空气电池的空气催化剂，Co@N-C-1的开路电压为1.439 V，能量密度为1413.3 Wh·kg。
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