A Self-Assembly Route to an Iron Phthalocyanine/Reduced Graphene Oxide Hybrid Electrocatalyst Affording an Ultrafast Oxygen Reduction Reaction
A Self-Assembly Route to an Iron Phthalocyanine/Reduced Graphene Oxide Hybrid Electrocatalyst Affording an Ultrafast Oxygen Reduction Reaction
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DOI：
10.1002/ppsc.201300177
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发表时间：
2013-12-01
影响因子：
2.7
通讯作者：
Matsumoto, Yasumichi
中科院分区：
文献类型：
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作者：
Taniguchi, Takaaki;Tateishi, Hikaru;Matsumoto, Yasumichi
氧化石墨烯(GO)是一种很有吸引力的独立载体，可以用超薄的有机层来装饰，以方便和低成本地制造具有可控功能和微结构的新型器件。报道了一种由还原氧化石墨烯(RGO)表面自组装的超薄铁酞菁(FePc)层组成的杂化材料在氧还原反应(ORR)中表现出优于商用铂/碳的催化活性。在溶液处理过程中，FePc层首先自组织成GO片层，然后进行电化学还原，形成FePc/rGO杂化电催化剂。动力学研究表明，杂化结构提供了由强主导的四电子过程引起的超快的ORR速率，通过形成杂化结构，催化剂的耐久性得到了显著的改善。光谱研究表明，FePc和rGO之间的协同效应提供了这些优势，而杂化结构和适当的还原步骤丰富了这些协同效应。
Graphene oxide (GO) is an attractive freestanding support that can be decorated with ultrathin organic layers for facile and low-cost fabrication of novel devices with controllable functional properties and microstructures. Here, it is reported that a hybrid material consisting of an ultrathin iron phthalocyanine (FePc) layer self-assembled on reduced graphene oxide (rGO) exhibits excellent catalytic activity that is superior to that of commercial Pt/C for an oxygen reduction reaction (ORR). During solution processing, the FePc layer is first self-organized onto GO sheets and then reduced electrochemically to form an FePc/rGO hybrid electrocatalyst. Kinetics studies reveal that the hybrid architecture affords an ultrafast ORR rate caused by a strongly dominant four-electron process, and the durability of the catalyst shows significant improvement by forming the hybrid structure. Spectroscopic studies suggest that these advantages are afforded by synergistic effects between FePc and rGO, which are enriched by the hybrid structure and the appropriate reduction step.