氮掺杂碳纳米管负载镍原子作为氧还原反应的高效电催化剂的研究

N-doped carbon nanotubes supported nickel atoms as electrocatalysts for ORR

将静电纺丝技术与金属有机框架相结合,通过一步热解法制备的氮掺杂多孔碳纳米管负载镍原子作为氧还原反应高效催化剂。电化学测试结果表明,当前驱体离子摩尔比为100∶10时,其具有最高的起始电位和半波电位,仅次于贵金属Pt/C。通过计时电流法测试表明,在给定电压下,经过20 000 s其电流密度还能保持在原来的81.7%,远高于Pt/C的63.5%,结果表明合成的电催化剂具有良好的稳定性。

Through combining the electrospinning technology with metal-organic frameworks, N-doped porous carbon nanotubes loaded nickel atoms for efficient oxygen reduction reaction(ORR) catalysts are prepared via pyrolysis method.Electrochemical test results indicate that the prepared catalysts have the highest initial potential and half wave potential, which are only lower than precious metal Pt/C when the molar ratio of precursor ions is 100∶10.Moreover, the current density of the catalysts remains 81.7% of the original after 20 000 s under the given voltage, which is much higher than the 63.5% of Pt/C,representing a good stability.