Zou Linchi, Pan Jian, Xu Feng, Chen Junfeng
College of Materials Science and Engineering, Fujian University of Technology Fuzhou 350118 China
Fujian Provincial Key Laboratory of Advanced Materials Processing and Application Fuzhou 350118 China.
RSC Adv. 2021 Nov 16;11(58):36726-36733. doi: 10.1039/d1ra05501a. eCollection 2021 Nov 10.
The widely studied Pt/C catalyst for direct methanol fuel cells (DMFCs) suffers severe carbon corrosion under operation, which undermines the catalytic activity and durability. It is of great importance to develop a carbon-free support with co-catalytic functionality for improving both the activity and durability of Pt-based catalysts. The direct loading of Pt on the smooth surface of oxides may be difficult. Herein, the Cu assisted loading of Pt on CeO is developed. Cu pre-coated CeO was facilely synthesized and Pt was electrochemically deposited to fabricate the carbon-free PtCu/CeO catalyst. The PtCu/CeO catalyst has a mass activity up to 1.84 and 1.57 times higher than Pt/C towards methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR), respectively. Better durability is also confirmed by chronoamperometry and accelerated degradation tests. The strategy in this work would be greatly helpful for developing an efficient carbon-free support of Pt-based catalysts for applications in DMFCs.
广泛研究的用于直接甲醇燃料电池（DMFC）的Pt/C催化剂在运行过程中会遭受严重的碳腐蚀，这会削弱其催化活性和耐久性。开发一种具有共催化功能的无碳载体对于提高Pt基催化剂的活性和耐久性非常重要。将Pt直接负载在氧化物的光滑表面上可能很困难。在此，开发了Cu辅助的Pt负载在CeO上的方法。通过简便合成预涂覆Cu的CeO，并电化学沉积Pt来制备无碳的PtCu/CeO催化剂。PtCu/CeO催化剂对于甲醇氧化反应（MOR）和氧还原反应（ORR）的质量活性分别比Pt/C高1.84倍和1.57倍。计时电流法和加速降解测试也证实了其具有更好的耐久性。这项工作中的策略将对开发用于DMFC应用的高效无碳Pt基催化剂载体有很大帮助。
