Highly Efficient Oxygen Reduction Reaction Fe-N-C Cathode in Long-durable Direct Glycol Fuel Cells  

作　　者：SHU Chengyong GAN Zhuofan ZHOU Jia WANG Zhen TANG Wei 

机构地区：[1]School of Chemical Engineering and Technology,Xi'an Jiaotong University,Xi'an 710049,P.R.China

出　　处：《Chemical Research in Chinese Universities》2022年第5期1268-1274,共7页高等学校化学研究（英文版）

基　　金：National Key R&D Program of China(No.2021YFB2400400);China Postdoctoral Science Foundation(No.2020M673408);National Natural Science Foundation of China(No.21905220);Key Research and Development Plan of Shaanxi Province,China(Nos.2018ZDXM-GY-135,2021JLM-36);Fundamental Research Funds for“Young Talent Support Plan”of Xi’an Jiaotong University,China(No.HG6J003);“1000-Plan Program”of Shaanxi Province and the Velux Foundations Through the Research Center V-Sustain(No.9455).

摘　　要：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 NH_(4)SCN 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 m^(2)/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/cm^(2) 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/cm^(2) current density.

关 键 词：Fuel cell Fe-N-C Single atom catalysis Oxygen reduction reaction(ORR) 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O643.36[理学—物理化学]