Size and structure tuning of FePt nanoparticles on hollow mesoporous carbon spheres as efficient catalysts for oxygen reduction reaction  

作　　者：Cheng Yang Han-Bin Wang Pei Liang Bin-Feng Wu Lei Zhao Ping-Shu Leng Lin Lv Hou-Zhao Wan Hao Wang 

机构地区：[1]School of Microelectronics,Hubei University,Wuhan,430062,China [2]Hubei Yangtze Memory Laboratories,Wuhan,430205,China [3]College of Optical and Electronic Technology,China Jiliang University,Hangzhou,310018,China

出　　处：《Rare Metals》2023年第6期1865-1876,共12页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.22174133)。

摘　　要：Finding and designing cathode oxygen reduction reaction(ORR) catalysts with high activity and stability in acidic electrolyte is essential for the large-scale application of fuel cells and metal-air batteries.Pt-based alloys have emerged as potential electrocatalysts for the oxygen reduction reaction.Herein,we adapted a simple pyrolytic reduction method to grow FePt nanoalloys on hollow mesoporous carbon supports.Benefiting from the ultra-high specific surface of the hollow mesoporous carbon,the in situ formed FePt NPs were homogenously deposited on the carbon supports with size smaller than5 nm.The optimized FePt-HMCS showed a remarkably increased mass activity(MA) of 0.582 A·mg^(-1)_(Pt) at 0.75 V in ORR,being 6.3 times higher than that of commercial Pt/C(0.093 A·mg^(-1)_(Pt)).Meanwhile,the FePt NPs showed negligible decay in mass activity with 21 mV of negative shift in the half-wave potential after 5000 electrochemical cycles,which is more stable than that of commercial Pt/C(6.6% decay in MA with 30 mV of negative shift).The study demonstrated a simple strategy for controlling the alloy size with enhanced metal-support interactions to boost their promising application in fuel cells.

关 键 词：Oxygen reduction ELECTROCATALYSTS Mesoporous carbon FePt alloy 

分 类 号：O643.36[理学—物理化学] TM911.4[理学—化学]