Highly Efficient Oxygen Reduction Electrocatalyst Derived from a New Three-Dimensional PolyPorphyrin
Highly Efficient Oxygen Reduction Electrocatalyst Derived from a New Three-Dimensional PolyPorphyrin
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由新型三维聚卟啉衍生的高效氧还原电催化剂
DOI：
10.1021/acsami.6b05560
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Xing-Hua Xia
中科院分区：
文献类型：
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作者：
Ren Shi-Bin;Jiong Wang;Xing-Hua Xia
以金属卟啉为骨架的氮掺杂多孔碳质材料（NDPC）已成为高效氧还原电催化剂的候选材料。为了提高这些NDPC在新型能量转换和存储器件中的ORR性能和耐久性，我们开发了一种新型的金属封装NDPC（HBY-COF-900），该金属封装NDPC通过将金属卟啉引入多孔COF中而由FeN 4活性位点组成。与基准的20%Pt/C相比，HBY-COF-900在酸性溶液中表现出更高的氧还原电催化活性，长期耐用性和良好的CO耐受性。这些性能可归因于FeN 4活性位点、高石墨化和多孔结构的协同效应。本工作为一步聚合法制备三维聚卟啉金属包埋NDPC开辟了一条途径
Metal-encapsulated nitrogen-doping porous carbonaceous materials (NDPCs) prepared from metalloporphyrin-based covalent organic frameworks (MP-COFs) have become very promising candidates for highly effective oxygen reduction electrocatalysts. To.enhance the ORR performance and durability of these NDPCs in novel energy conversion and storage devices, we develop a new type of metal-encapsulated NDPCs (HBY-COF-900) composed of FeN4 active sites by introduction of metalloporphyrin into porous COFs. Comparable to the benchmark 20% Pt/C, HBY-COF-900 in acidic solutions exhibits higher oxygen reduction electrocatalytic activity, long-term durability, and good CO tolerance. These properties can be attributed to a synergistic effect of FeN4 active sites, high graphitization, and porous structure. This work opens an avenue for the development of metal-encapsulated NDPCs from three-dimensional polyporphyrin prepared by one-step polymerization