以六水合硝酸钴为金属钴源、二甲基咪唑为有机配体,采用一步溶剂热法在氧化石墨烯(GO)表面原位生长ZIF-67,得到金属有机骨架ZIF-67@GO前驱体,经过高温热解得到钴/氮共掺杂碳纳米片(Co/N-CNSs)。采用SEM、XRD、XPS等分析技术对Co/N-CNSs的形貌、结构及化学组成进行表征,利用旋转圆盘电极技术测试其电催化氧还原反应(ORR)活性。研究结果表明,Co/N-CNSs的平均转移电子数为3.84,与商业Pt/C催化剂相比,Co/N-CNSs具有较强的耐甲醇性和长期耐久性,具有广阔的商业应用前景。
ZIF-67 was grown in situ on the graphene oxide (GO) surface by one-step solvothermal method with cobalt nitrate hexahydrate as the metallic cobalt source and dimethylimidazole as the organic ligand to prepare the metal-organic framework ZIF-67@GO precursor.Cobalt/nitrogen co-doped carbon nanosheets (Co/N-CNSs) were obtained by high-temperature pyrolysis.The morphology,structure and chemical composition of Co/N-CNSs were characterized by SEM,XRD and XPS,and the electrocatalytic oxygen reduction reaction (ORR) activity of the catalyst was tested by rotating disk electrode technology.The results showed that the average number of electrons transferred by the catalyst was 3.84.Compared with commercial Pt/C catalysts,Co/N-CNSs demonstrated strong methanol resistance and long-term durability,indicating broad commercial application prospects.
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基金资助
中国煤炭科工集团有限公司科技创新创业资金专项重点项目(2022-2-ZD004)
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