Connected iridium nanoparticle catalysts coated onto silica with high density for oxygen evolution in polymer electrolyte water electrolysis

Yoshiyuki Sugita; Takanori Tamaki; Hidenori Kuroki; Takeo Yamaguchi

doi:10.1039/c9na00568d

Connected iridium nanoparticle catalysts coated onto silica with high density for oxygen evolution in polymer electrolyte water electrolysis

Nanoscale Adv. 2019 Dec 2;2(1):171-175. doi: 10.1039/c9na00568d. eCollection 2020 Jan 22.

Authors

Yoshiyuki Sugita¹, Takanori Tamaki^{1

2}, Hidenori Kuroki^{1

2}, Takeo Yamaguchi^{1

2}

Affiliations

¹ Laboratory for Chemistry and Life Science, Tokyo Institute of Technology R1-17, 4259 Nagatsuta, Midori-ku Yokohama 226-8503 Japan [email protected].
² Kanagawa Institute of Industrial Science and Technology R1-17, 4259 Nagatsuta, Midori-ku Yokohama 226-8503 Japan.

Abstract

We propose connected Ir nanoparticle catalysts (Ir/SiO₂) by coating 1.8 nm Ir particles with high density onto silica for the oxygen evolution reaction. Nanoparticles form electron-conducting networks, which can eliminate the need for an electron-conducting support. Ir/SiO₂ showed a high electrochemical surface area, mass activity, and water electrolysis performance.