Highly Efficient Oxygen Reduction Reaction Fe-N-C Cathode in Long-durable Direct Glycol Fuel Cells |
| |
Authors: | SHU Chengyong GAN Zhuofan ZHOU Jia WANG Zhen TANG Wei |
| |
Institution: | School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China |
| |
Abstract: | The oxygen reduction reaction in direct glycol fuel cells heavily relies on noble metal-based electrocatalysts. In this work, novel Pt group metal-free catalysts based on porous Fe-N-C materials are successfully synthesized as catalysts with high activity and durability for the cathode oxygen reduction reaction (ORR). Through the encapsulation of NH4SCN salt, the surface elements and pore structure of the catalyst are effectively changed, and the active sites of Fe effectively are increased. The half-wave potential of the best Fe-N-C catalyst was –0.02 V vs. Hg/HgO in an alkaline environment. The porous Fe-N-C catalyst possesses a large specific surface area(1158 m2/g) and shows good activity and tolerance to glycol. The direct glycol fuel cell with the Fe-N-C cathode achieved a maximum power density of 62.2 mW/cm2 with 4 mol/L KOH and 4 mol/L glycol solution at 25 °C and maintained discharge for more than 250 h at a 50 A/cm2 current density. |
| |
Keywords: | Fuel cell Fe-N-C Single atom catalysis Oxygen reduction reaction(ORR) |
|
| 点击此处可从《高等学校化学研究》浏览原始摘要信息 |
| 点击此处可从《高等学校化学研究》下载免费的PDF全文 |