The Influence of Surfaces and Deposition Processes on Pt Structure and Properties

Sidney Coombs; Arrelaine Dameron; Chaiwat Engtrakul; Svitlana Pylypenko; Jinsuk Lee; Tim S. Olson; Chris Bochert; Thomas Gennett; Lin Simpson; Bryan Pivovar; Huyen N. Dinh

doi:10.1149/1.3484519

The Influence of Surfaces and Deposition Processes on Pt Structure and Properties

Sidney Coombs, Arrelaine Dameron, Chaiwat Engtrakul, Svitlana Pylypenko, Jinsuk Lee, Tim S. Olson, Chris Bochert, Thomas Gennett, Lin Simpson, Bryan Pivovar, Huyen N. Dinh

Chemistry and Nanoscience

Research output: Contribution to journal › Article › peer-review

1 Scopus Citations

Abstract

Transparent conductive oxides (TCOs), In-Zn-O (IZO) and Ga-Zn-O (GZO), on glass are used as model substrates to study the effect of surface treatments and deposition processes on Pt growth and nanostructure. The TCO type and surface treatments appear to affect Pt nucleation and growth. Ar and O₂ plasma surface treatments significantly lowered the contact angle of water measured on TCOs compared to trimethylaluminum surface treatment and samples without surface treatment. Annealing TCO samples in oxygen resulted in lower IZO conductivity and higher contact angle; while annealing in vacuum or hydrogen resulted in increased carbon on the surface, which appears to be related to higher water contact angles and higher conductivity. Higher amounts of zinc and carbon (probably due to contamination from the annealing chamber) on the IZO surface seem to correlate with lower water contact angles and lower conductivity.

Original language	American English
Pages (from-to)	221-228
Number of pages	8
Journal	ECS Transactions
Volume	33
Issue number	1 PART 1
DOIs	https://doi.org/10.1149/1.3484519 https://doi.org/10.1149/1.3484519
State	Published - 2010
Event	10th Polymer Electrolyte Fuel Cell Symposium, PEFC 10 - 218th ECS Meeting - Las Vegas, NV, United States Duration: 10 Oct 2010 → 15 Oct 2010

NREL Publication Number

NREL/JA-5600-48742

Keywords

durability
fuel cells
performance

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abstract = "Transparent conductive oxides (TCOs), In-Zn-O (IZO) and Ga-Zn-O (GZO), on glass are used as model substrates to study the effect of surface treatments and deposition processes on Pt growth and nanostructure. The TCO type and surface treatments appear to affect Pt nucleation and growth. Ar and O2 plasma surface treatments significantly lowered the contact angle of water measured on TCOs compared to trimethylaluminum surface treatment and samples without surface treatment. Annealing TCO samples in oxygen resulted in lower IZO conductivity and higher contact angle; while annealing in vacuum or hydrogen resulted in increased carbon on the surface, which appears to be related to higher water contact angles and higher conductivity. Higher amounts of zinc and carbon (probably due to contamination from the annealing chamber) on the IZO surface seem to correlate with lower water contact angles and lower conductivity.",

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author = "Sidney Coombs and Arrelaine Dameron and Chaiwat Engtrakul and Svitlana Pylypenko and Jinsuk Lee and Olson, {Tim S.} and Chris Bochert and Thomas Gennett and Lin Simpson and Bryan Pivovar and Dinh, {Huyen N.}",

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AU - Coombs, Sidney

AU - Dameron, Arrelaine

AU - Engtrakul, Chaiwat

AU - Pylypenko, Svitlana

AU - Lee, Jinsuk

AU - Olson, Tim S.

AU - Bochert, Chris

AU - Gennett, Thomas

AU - Simpson, Lin

AU - Pivovar, Bryan

AU - Dinh, Huyen N.

PY - 2010

Y1 - 2010

N2 - Transparent conductive oxides (TCOs), In-Zn-O (IZO) and Ga-Zn-O (GZO), on glass are used as model substrates to study the effect of surface treatments and deposition processes on Pt growth and nanostructure. The TCO type and surface treatments appear to affect Pt nucleation and growth. Ar and O2 plasma surface treatments significantly lowered the contact angle of water measured on TCOs compared to trimethylaluminum surface treatment and samples without surface treatment. Annealing TCO samples in oxygen resulted in lower IZO conductivity and higher contact angle; while annealing in vacuum or hydrogen resulted in increased carbon on the surface, which appears to be related to higher water contact angles and higher conductivity. Higher amounts of zinc and carbon (probably due to contamination from the annealing chamber) on the IZO surface seem to correlate with lower water contact angles and lower conductivity.

AB - Transparent conductive oxides (TCOs), In-Zn-O (IZO) and Ga-Zn-O (GZO), on glass are used as model substrates to study the effect of surface treatments and deposition processes on Pt growth and nanostructure. The TCO type and surface treatments appear to affect Pt nucleation and growth. Ar and O2 plasma surface treatments significantly lowered the contact angle of water measured on TCOs compared to trimethylaluminum surface treatment and samples without surface treatment. Annealing TCO samples in oxygen resulted in lower IZO conductivity and higher contact angle; while annealing in vacuum or hydrogen resulted in increased carbon on the surface, which appears to be related to higher water contact angles and higher conductivity. Higher amounts of zinc and carbon (probably due to contamination from the annealing chamber) on the IZO surface seem to correlate with lower water contact angles and lower conductivity.

KW - durability

KW - fuel cells

KW - performance

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EP - 228

JO - ECS Transactions

JF - ECS Transactions

IS - 1 PART 1

T2 - 10th Polymer Electrolyte Fuel Cell Symposium, PEFC 10 - 218th ECS Meeting

Y2 - 10 October 2010 through 15 October 2010

ER -

The Influence of Surfaces and Deposition Processes on Pt Structure and Properties

Abstract

NREL Publication Number

Keywords

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