Preparation and Activity Evaluation of Catalyst Using Metal Phthalocyanine for Polymer Electrolyte Fuel Cells

Influence of Metal Desorption of Cathode Catalysts for Polymer Electrolyte Fuel Cells on Oxygen Reduction Activity

“…(2) and tetracarboxy copper phthalocyanine (M2) [9,10] Scheme 1 shows the synthetic pathways for phthalocyanine monomers. We have already reported the method of synthesizing 2 and M1.…”

“…We have already reported the method of synthesizing 2 and M1. [9] Tetracarboxamide copper phthalocyanine (3) [9] Scheme 2 shows the synthetic pathways for composites (P1, P2). The synthetic method of P1 has already been reported, [9] and P2 was synthesized using M2 instead of M1 as the raw material.…”

“…In the study processes, we have focused on improving the content of C-N bonds. [8,9] As a result, the performance of the catalyst was revealed to be improved as the content of nitrogen increased. Figure 1 shows the composites prepared from the polymerization of metal phthalocyanines and diamino-functionalized aromatic compounds (P1-P3).…”

“…The catalyst prepared from P2 had the highest oxygen reduction activity (ORA). [9] However, it would be favorite to investigate the influence of the M-N bonds site on ORA and to reducing the amount of metal and to prepare clean catalysts, because metals are relatively heavy, limited resource, and sometimes toxic. In this study, we have synthesized platinum-alternative oxygen reduction catalysts obtained by baking composites consisting of Co or Cu phthalocyanine monomer and pphenylenediamine and treated the obtained catalysts with aqua regia to desorb the involved metal.…”