Platinum Nickel Nanowires as Methanol Oxidation Electrocatalysts | Zendy

Shaun M Alia | Zendy; Svitlana Pylypenko | Zendy; K.C. Neyerlin | Zendy; Shyam S. Kocha | Zendy; Bryan S. Pivovar | Zendy

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Platinum Nickel Nanowires as Methanol Oxidation Electrocatalysts

Author(s) -

Shaun M Alia,

Svitlana Pylypenko,

K.C. Neyerlin,

Shyam S. Kocha,

Bryan S. Pivovar

Publication year - 2015

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.258

H-Index - 271

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/2.0231512jes

Subject(s) - electrocatalyst , methanol , catalysis , platinum , ruthenium , nickel , methanol fuel , inorganic chemistry , ruthenium oxide , carbon monoxide , oxide , chemistry , metal , materials science , chemical engineering , electrochemistry , electrode , metallurgy , organic chemistry , engineering

We investigated platinum(Pt) nickel (Ni) nanowires (PtNiNWs) as methanol oxidation reaction (MOR) catalysts in rotating disk electrode (RDE) half-cells under acidic conditions. Pt-ruthenium (Ru) nanoparticles have long been the state of the art MOR catalyst for direct methanol fuel cells (DMFCs) where Ru provides oxophilic sites, lowering the potential for carbon monoxide oxidation and the MOR onset. Ru, however, is a precious metal that has long term durability concerns. Ni/Ni oxide species offer a potential to replace Ru in MOR electrocatalysis. PtNiNWs were investigated for MOR and oxygen annealing was investigated as a route to improve catalyst performance (mass activity 65% greater) and stability to potential cycling. Our results presented show that PtNiNWs offer significant promise in the area, but also result in Ni ion leaching that is a concern requiring further evaluation in fuel cells.

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