Enhanced electrocatalytic oxidation of methanol on Au-Pt bimetallic particles modified copper phthalocyanine-carbon nanotube composite electrode
Makaleler > Tam Makale · 2021
Yazarlar: ÇAĞRI CEYLAN KOÇAK, Zekerya DURSUN
Materials Science and Engineering: B, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2021, cilt 275, ss 115485-115485
DOI: 10.1016/j.mseb.2021.115485
Özet
In this work, we prepared modified copper phthalocyanine-carbon nanotube (CuPc-CNT) catalysts containing bimetallic (Au-Pt, Au/Pt, Pt/Au) and monometallic nanoparticles (Au or Pt), using a simple electrochemical technique. We investigated the catalyst structural and physical properties by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, and electrochemical impedance spectroscopy. The bimetallic systems (Au-Pt/CuPc-CNT > Pt/Au/CuPc-CNT > Au/Pt/CuPc-CNT) proved to have a better current density towards methanol oxidation than that of mono-metallic systems (Pt/CuPc-CNT > Au/CuPc-CNT) in alkaline media. The electrochemical surface area (ECSA) of Au-Pt/CuPc-CNT was found to be 60.25 m(2) g(-1). The methanol oxidation reaction took place with the electron transfer, followed by the catalytic chemical reaction. Thus, the electrochemically-prepared Au-Pt/CuPc-CNT catalyst of the highest stability and enhanced electrocatalytic activity towards methanol oxidation represents a promising candidate for use in alkaline direct methanol fuel cells.