Nickel Nanowire Oxidation and Its Effect on Platinum Galvanic Displacement and Methanol Oxidation

Shaun Alia; Svitlana Pylypenko; Kenneth Neyerlin; Bryan Pivovar; Shyam Kocha

doi:10.1149/06403.0089ecst

Nickel Nanowire Oxidation and Its Effect on Platinum Galvanic Displacement and Methanol Oxidation

Shaun Alia, Svitlana Pylypenko, Kenneth Neyerlin, Bryan Pivovar, Shyam Kocha

Chemistry and Nanoscience

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Abstract

The heat treatment of nickel (Ni) nanowires (NiNWs) in oxygen is examined for its effect on platinum (Pt) galvanic displacement and the activity of Pt-coated NiNWs (PtNiNWs) in the methanol oxidation reaction (MOR). Annealing of NiNWs in oxygen is found to reduce Pt displacement, increasing its resistance to potential-driven dissolution (during electrochemical break-in). In reducing Ni dissolution, oxophilic species are provided in close proximity to Pt sites and the MOR activity of PtNiNWs improves, particularly at low overpotential in rotating disk electrode halfcells.

Original language	American English
Pages (from-to)	89-95
Number of pages	7
Journal	ECS Transactions
Volume	64
Issue number	3
DOIs	https://doi.org/10.1149/06403.0089ecst https://doi.org/10.1149/06403.0089ecst
State	Published - 2014
Event	14th Polymer Electrolyte Fuel Cell Symposium, PEFC 2014 - 226th ECS Meeting - Cancun, Mexico Duration: 5 Oct 2014 → 9 Oct 2014

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Publisher Copyright:
© The Electrochemical Society.

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NREL/JA-5900-63856

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title = "Nickel Nanowire Oxidation and Its Effect on Platinum Galvanic Displacement and Methanol Oxidation",

abstract = "The heat treatment of nickel (Ni) nanowires (NiNWs) in oxygen is examined for its effect on platinum (Pt) galvanic displacement and the activity of Pt-coated NiNWs (PtNiNWs) in the methanol oxidation reaction (MOR). Annealing of NiNWs in oxygen is found to reduce Pt displacement, increasing its resistance to potential-driven dissolution (during electrochemical break-in). In reducing Ni dissolution, oxophilic species are provided in close proximity to Pt sites and the MOR activity of PtNiNWs improves, particularly at low overpotential in rotating disk electrode halfcells.",

author = "Shaun Alia and Svitlana Pylypenko and Kenneth Neyerlin and Bryan Pivovar and Shyam Kocha",

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T1 - Nickel Nanowire Oxidation and Its Effect on Platinum Galvanic Displacement and Methanol Oxidation

AU - Alia, Shaun

AU - Pylypenko, Svitlana

AU - Neyerlin, Kenneth

AU - Pivovar, Bryan

AU - Kocha, Shyam

N1 - Publisher Copyright: © The Electrochemical Society.

PY - 2014

Y1 - 2014

N2 - The heat treatment of nickel (Ni) nanowires (NiNWs) in oxygen is examined for its effect on platinum (Pt) galvanic displacement and the activity of Pt-coated NiNWs (PtNiNWs) in the methanol oxidation reaction (MOR). Annealing of NiNWs in oxygen is found to reduce Pt displacement, increasing its resistance to potential-driven dissolution (during electrochemical break-in). In reducing Ni dissolution, oxophilic species are provided in close proximity to Pt sites and the MOR activity of PtNiNWs improves, particularly at low overpotential in rotating disk electrode halfcells.

AB - The heat treatment of nickel (Ni) nanowires (NiNWs) in oxygen is examined for its effect on platinum (Pt) galvanic displacement and the activity of Pt-coated NiNWs (PtNiNWs) in the methanol oxidation reaction (MOR). Annealing of NiNWs in oxygen is found to reduce Pt displacement, increasing its resistance to potential-driven dissolution (during electrochemical break-in). In reducing Ni dissolution, oxophilic species are provided in close proximity to Pt sites and the MOR activity of PtNiNWs improves, particularly at low overpotential in rotating disk electrode halfcells.

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U2 - 10.1149/06403.0089ecst

DO - 10.1149/06403.0089ecst

M3 - Article

AN - SCOPUS:84921295993

SN - 1938-5862

VL - 64

SP - 89

EP - 95

JO - ECS Transactions

JF - ECS Transactions

IS - 3

T2 - 14th Polymer Electrolyte Fuel Cell Symposium, PEFC 2014 - 226th ECS Meeting

Y2 - 5 October 2014 through 9 October 2014

ER -

Nickel Nanowire Oxidation and Its Effect on Platinum Galvanic Displacement and Methanol Oxidation

Abstract

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