Pyrolysis-Free Oxygen Reduction Reaction (ORR) Electrocatalysts Composed of Unimolecular Layer Metal Azaphthalocyanines Adsorbed onto Carbon Materials
Pyrolysis-Free Oxygen Reduction Reaction (ORR) Electrocatalysts Composed of Unimolecular Layer Metal Azaphthalocyanines Adsorbed onto Carbon Materials
复制标题
DOI：
10.1021/acsaem.1c03054
复制
发表时间：
2021-12
影响因子：
6.4
通讯作者：
H. Yabu;Koki Nakamura;Y. Matsuo;Yutaro Umejima;Haruyuki Matsuyama;J. Nakamura;Koju Ito
中科院分区：
文献类型：
--
作者：
H. Yabu;Koki Nakamura;Y. Matsuo;Yutaro Umejima;Haruyuki Matsuyama;J. Nakamura;Koju Ito
在聚合物电解质燃料电池（PEFC）和金属空气电池中，阴极处的氧还原反应（ORR）是能量转换过程中的关键瓶颈之一。吸附在碳基体上的氮杂萘铁单分子层（Fe-AZUL）作为Pt/C电催化剂的替代物，具有较高的氧化还原活性。本文报道了具有不同外围结构和络合金属的各种AzPc分子的合成，以及含有合成分子和碳的催化剂的ORR活性的测量。通过电化学分析、密度泛函理论（DFT）计算和电离电位（IP）值的测量表征了催化活性。结果表明，Ketjen Black（KB）上的IP值是高ORR活性的重要指标之一，为高性能电催化剂的开发提供了指导。
The oxygen reduction reaction (ORR) at the cathode is one of the critical bottlenecks in the energy conversion process in polymer electrolyte fuel cells (PEFCs) and metal–air batteries. An iron azaphthalocyanine unimolecular layer (Fe-AZUL) adsorbed onto a carbon substrate exhibited high ORR activity as an alternative of Pt supported on carbon black (Pt/C) electrocatalyst. We herein report the synthesis of various AzPc molecules with different peripheral structures and complex metals, as well as measurements of the ORR activities of catalysts containing the synthesized molecules and carbons. The catalytic activities were characterized by electrochemical analysis, density functional theory (DFT) calculations, and measurements of ionization potential (IP) values. From the results, the IP values on Ketjen Black (KB) were found to be one of the significant indicators for high ORR activities, providing a guideline for the development of high-performance electrocatalysts.