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Pt‐IrO 2 nanorod array electrode for oxygen evolution in PEM water electrolysis cell
Author(s) -
Ye Feng,
Hu Weiwei,
Liu Hui,
Liu Jiangshan,
Li Jianling,
Wang Xindong,
Yang Jun
Publication year - 2012
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.1675
Subject(s) - nanorod , noble metal , calcination , electrolysis , anode , cathode , materials science , chemical engineering , electrolysis of water , catalysis , proton exchange membrane fuel cell , oxygen evolution , carbon fibers , nanotechnology , electrode , electrochemistry , metal , chemistry , composite material , electrolyte , metallurgy , composite number , engineering , biochemistry
Pt‐IrO 2 nanorod arrays supported on the carbon paper were fabricated directly using the dip‐coating/calcination method. The nanorod arrays and ordering were characterized by scanning electron microscope. Pt‐IrO 2 /carbon paper directly used as catalyst layer and support layer with the united structure on the anode side is demonstrated to have excellent electrocatalytic activity for oxygen evolution in proton exchange membrane (PEM) water electrolysis cell. By employing the Pt‐IrO 2 (Pt:Ir = 3:7) at anode and commercial 20% Pt/C catalysts at cathode, a cell voltage as low as 1.86 V was achieved under high current density with the total noble metal loading of 0.8 mg cm −2 . The Pt‐IrO 2 electrocatalysts with uniform nanorod arrays structure, good conductivity are supposed to play a key role for their enhanced catalytic activity toward oxygen evolution reaction. The study in this work might open an opportunity for the efficient utilization of valuable catalytic materials in PEM water electrolysis by decreasing the catalyst loading and provide a facile route to fabricate electrode based on direct calcination of noble metal and metal oxide nanoparticles onto carbon paper. © 2012 Curtin University of Technology and John Wiley & Sons, Ltd.