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ZIF-67 derived Co, Fe, Ni co-doped porous carbon as an efficient electrocatalyst for hydrogen evolution reaction
Journal of Porous Materials ( IF 2.5 ) Pub Date : 2020-07-24 , DOI: 10.1007/s10934-020-00944-7
Liping Zhao , Ailin Yang , Anqi Wang , Hang Yu , Jun Dai , Youjin Zheng

Exploring electrocatalysts with abundant active sites, durability and non-precious performance for hydrogen evolution reaction (HER) is of significant importance for the energy crisis. In this paper, Co, Fe, Ni co-doped porous carbon (CoFeNi/PC) was fabricated by using zeolitic imidazolate framework-67 (ZIF-67) as precursor via a facile absorption and pyrolysis process. Compared with Co/PC, CoFe/PC, and CoNi/PC, CoFeNi/PC exhibits excellent HER performance with a low overpotential of 289 mV at 10 mA cm−2 and s small Tafel slope of 65.8 mA dec−1. Furthermore, CoFeNi/PC also shows a good long-time stability with a high current retention of 96.2% after 12 h of continuous measurement. During the HER process, Co, Fe, Ni can act as active sites and porous carbon facilitates the charge transportation. The abundant active sites and unique architecture lead to the outstanding HER performance of CoFeNi/PC.



中文翻译:

ZIF-67衍生的Co,Fe,Ni共掺杂多孔碳作为氢析出反应的有效电催化剂

对于氢危机而言,探索具有丰富的活性中心,持久性和非贵重性能的电催化剂对于氢能危机至关重要。本文以沸石咪唑盐骨架67(ZIF-67)为前驱体,通过简便的吸收和热解工艺制备了Co,Fe,Ni共掺杂多孔碳(CoFeNi / PC)。与Co / PC,CoFe / PC和CoNi / PC相比,CoFeNi / PC表现出出色的HER性能,在10 mA cm -2时低至289 mV的低电势,以及65.8 mA dec -1的小Tafel斜率。此外,CoFeNi / PC在连续测量12小时后,还显示出良好的长期稳定性和96.2%的高电流保持率。在HER过程中,Co,Fe,Ni可以充当活性位点,而多孔碳有助于电荷传输。丰富的活动站点和独特的架构使CoFeNi / PC具有出色的HER性能。

更新日期:2020-09-30
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