2026-09-29 東北大学
図1. 青色顔料触媒の分子構造と触媒の調製方法
＜関連情報＞
- https://www.tohoku.ac.jp/japanese/2026/09/press20260929-01-phthalocyanine.html
- https://pubs.acs.org/accacs/article/doi/10.1021/acscatal.6c03312/5439299/Advanced-Metal-Phthalocyanine-Based-Catalysts-with
高性能アニオン交換膜燃料電池向け、酸素還元反応活性が向上した先進的な金属フタロシアニン系触媒 Advanced Metal-Phthalocyanine-Based Catalysts with Enhanced Oxygen Reduction Reaction Activity for High-Performance Anion-Exchange Membrane Fuel Cells
John C. Douglin;Kosuke Ishibashi;Yutaro Hirai;Yasutaka Matsuo;Koji Suto;Pankaj Kumar;Maytal Caspary Toroker;Hiroshi Yabu;Dario R. Dekel
ACS Catalysis Published:September 26, 2026
DOI:https://doi.org/10.1021/acscatal.6c03312
Abstract
Metal phthalocyanine (MPc)-based catalysts offer a structurally tunable platform for the oxygen reduction reaction (ORR) in alkaline media, yet their application in anion-exchange membrane fuel cells (AEMFCs) has been limited by insufficient performance. Here, we report two iron tetra-azaphthalocyanine catalysts, AZ-FT-30 and AZ-FO-30, evaluated in AEMFCs. Both catalysts exhibit comparable electrochemical surface areas (∼156–158 m2 g–1), enabling isolation of intrinsic activity. AZ-FO-30 demonstrates better catalyst activity toward alkaline ORR and enhanced cathode performance, achieving a peak power density of 902 mW cm–2 under H2–O2 conditions, representing the highest reported value for MPc-based AEMFC cathodes to date. Notably, the AZ-FO-30-based cell sustains stable operation over 35 h at 400 mA cm–2 with a minimal voltage decay (2.4 mV h–1), demonstrating the capability of MPc systems to achieve extended device-level durability. Density functional theory calculations demonstrate that AZ-FO-30 exhibits the shortest Fe–O bond distance, indicative of the strongest OH adsorption at the Fe active site, a trend consistently observed with the model containing one explicit water molecule, confirming its good adsorption characteristics. These findings demonstrate that targeted modification of the phthalocyanine framework enables the development of high-performance and durable cathode materials for platinum-group metal-free AEMFCs.
