| Co-Co9S8/N掺杂科琴黑复合材料的制备及其氧还原反应催化性能 | |
| Preparation and Catalytic Performance of Co-Co9S8/N-Doped Ketjen Black Composite for Oxygen Reduction Reaction | |
| 摘要: 采用普鲁士蓝类似物作为前驱体，结合高温煅烧，制备了高导电碳（氮掺杂科琴黑）支撑、单金属引入的Co-Co9S8/N-KB氧还原反应（ORR）催化剂。研究了煅烧温度对ORR催化性能的影响。结果发现，在800℃下进行煅烧，所得催化剂的ORR催化活性最大，其起始电位和半波电位分别为0.93和0.83 V，与商业级Pt/C相当，并且极限电流密度高达5.7 mA·cm-2。该催化剂的稳定性也十分优异，经过10 000 s长时间持续催化后电流密度还能保持初始值的95.6%；在0.5~1.0 V之间进行5 000次循环的加速老化实验之后，其半波电位仅偏移了8.6 mV。此外，在铝-空气全电池应用中，在50 mA·cm-2的放电电流密度下，Co-Co9S8/N-KB催化剂的放电电压可达1.53 V，高于商业级Pt/C。 | |
| 关键词: 硫化钴 铝-空气电池 氧还原反应催化剂 | |
| 基金项目: 湖南省教育厅科学研究基金（No.19K028，19C0583）和湖南省教育厅重点项目（No.18A273）资助。 | |
| Abstract: Co-Co9S8/N-KB composite catalyst supported by high conductivity carbon (nitrogen doped Ketjen black) and introduced by single metal for oxygen reduction reaction (ORR) was prepared using Prussian blue analogue as precursor through high temperature annealing technology. By comparison of different annealing temperatures, it is found that the catalyst gained at the annealing temperature of 800℃ showed the best catalytic activity for ORR. The initial potential and half-wave potential were 0.93 and 0.83 V respectively, comparable to commercial Pt/C, and the limit current density reached 5.7 mA·cm-2, higher than that of Pt/C. After a long period of 10 000 s for chronoam-perometry experiment, the current density still retained at 95.6% of the initial, and the half-wave potential shifted just only 8.6 mV after 5 000 cycles subjected in a range of 0.5 to 1.0 V (vs RHE) during the accelerated durability test. In addition, in actual Al-air full battery applications, the discharge platform of Co-Co9S8/N-KB reached 1.53 V at a discharge density of 50 mA·cm-2, higher than that of Pt/C. | |
| Keywords: cobalt sulfide aluminum-air battery oxygen reduction reaction catalyst | |
| 投稿时间：2021-03-03 修订日期：2021-06-26 | |
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| 李福枝,陈真,张丹,孙翱魁,石璞,贺全国.Co-Co9S8/N掺杂科琴黑复合材料的制备及其氧还原反应催化性能[J].无机化学学报,2021,37(9):1579-1588. | |
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