[18p-A204-1~17] 12.3 Functional Materials and Novel Devices

△ [18p-A204-8] Fe Phthalocyanine Derivative Electrodes for High Performance Oxygen Reduction Reaction

〇Hiroya Abe¹, Yutaro Hirai², Kohei Nozaki¹, Tomokazu Matsue¹, Hiroshi Yabu³ (1.Grad. of Env. Stu. Tohoku Univ., 2.Grad. of Eng., Tohoku Univ., 3.WPI-AIMR, Tohoku Univ.)

Keywords:Fuel cell, Oxygen reduction reaction, Phthalocyanine

The cathodic oxygen reduction reaction (ORR) is a sluggish and also the most challenging step in polymer electrolyte membrane (PEM) fuel cells, which dominates the devices’ performance. In the commercial cathodic electrode of the fuel cell, the most practical ORR catalysts are still Pt-based materials. However, the drawbacks of the Pt-based catalysts, such as high cost and limited natural abundance are still not sufficiently addressed, delaying the large-scale commercialization of their associated technologies.
Recently, it has been reported that metal (Fe and Co) phthalocyanine (Pc) on a carbon material has high high catalytic comparable to Pt-based materials. In this study, we report the synthesis of a highly active catalytic electrode, by using complex of an iron phthalocyanine derivative (FeTPP, Iron Tetrapyrazinoporphyrazine) and a carbon material.
From the cyclic voltammograms (CVs) of FePc/MWCNT and FeTPP/MWCNT under an argon atmosphere, a reduction peak, assigned to the reduction reaction of the central metal Fe³⁺, were observed at -0.13 and -0.03 V vs. Ag/AgCl, respectively. From the linear sweep voltammograms (LSVs) of FePc/MWCNT and FeTPP/MWCNT under an oxygen atmosphere, the oxygen reduction reaction starts from 0.00 and + 0.05 V vs. Ag/AgCl, respectively. FeTPP/MWCNT might show a high ORR onset potential due to the reduction reaction of Fe³⁺ occurring on the lower energy than FePc/MWCNT. From the above, we successfully produced a catalyst having high ORR activity by using FeTPP which is FePc derivative.