Enhanced Catalytic Performance of Pt-Free Iron Phthalocyanine by Graphene Support for Efficient Oxygen Reduction Reaction
Enhanced Catalytic Performance of Pt-Free Iron Phthalocyanine by Graphene Support for Efficient Oxygen Reduction Reaction
复制标题
石墨烯载体增强无铂铁酞菁的催化性能，实现高效氧还原反应
DOI：
10.1021/cs4001927
复制
发表时间：
2013-06-01
期刊：
影响因子：
12.9
通讯作者：
Chen, Wei
中科院分区：
文献类型：
--
作者：
Jiang, Yuanyuan;Lu, Yizhong;Chen, Wei
人们普遍认为，如果昂贵的贵金属基氧还原反应(ORR)电催化剂不能被其他廉价、高效、稳定的催化剂所取代，那么燃料电池的大规模实际应用几乎是不可能的。因此，我们的研究表明，在碱性介质中，以化学还原的石墨烯为载体，通过π-π相互作用负载的铁酞菁(FePc)可以作为一种无贵金属的电催化剂，在碱性介质中具有与商用铂/碳相当的活性、长期的操作稳定性以及更好的抗甲醇渗透和CO中毒的能力。石墨烯提高了FePc的电化学活性和稳定性，这主要归功于石墨烯的固有性质以及FePc与石墨烯平面芳香结构之间的π堆积作用。所制备的石墨烯-铁酞菁(g-FePc)复合材料具有有效的4电子通道，有望作为无铂ORR电催化剂。
It is commonly accepted that it is almost not possible to realize the large-scale practical application of fuel cells if the expensive noble metal-based electrocatalysts for oxygen reduction reactions (ORR) cannot be replaced by other low-cost, efficient, and stable ones. Herein, our studies demonstrate that iron phthalocyanine (FePc) supported on chemically reduced graphene through π–π interaction can act as a noble metal-free electrocatalyst with a comparable activity, long-term operation stability, and better tolerance to methanol crossover and CO poisoning compared with commercial Pt/C for ORR in alkaline media. The improved electrochemical activity and stability of FePc by graphene is mainly attributed to the inherent properties of graphene and the π-stacking interaction between FePc and planar aromatic structure of graphene. The as-prepared graphene–iron phthalocyanine (g-FePc) composite exhibits an efficient 4-electron pathway and can be used as a promising Pt-free ORR electrocatalyst.