SiO2-RuO2: A stable electrocatalyst support

Chih Ping Lo; Vijay Ramani

doi:10.1021/am3017416

SiO₂-RuO₂: A stable electrocatalyst support

Chih Ping Lo
, Vijay Ramani

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

29 Scopus citations

Abstract

High surface area SiO₂-RuO₂ (SRO) supports with various SiO₂: RuO₂ ratios were synthesized using a wet chemical method. The supports were catalyzed by depositing platinum nanoparticles on their surface. The synthesized materials were characterized by XRD, TEM, BET, and linear sweep voltammetry to study microstructure and properties. The electrochemical stability, electrochemical surface area, electrocatalytic activity and fuel cell performance were also measured. The optimal 1:1 mol ratio of SiO₂-RuO₂ (SRO-1) possessed a BET surface area of 305 m²/g and an electrical conductivity of 24 S/cm. This SRO support demonstrated 10-fold higher electrochemical stability than Vulcan XC-72R carbon when subjected to an aggressive accelerated stability test (AST) involving 10,000 potential cycles between 1 and 1.5 V. The mass activity of Pt-doped SRO-1 was 54 mA/mg_Pt, whereas its specific activity was 115 μA cm_Pt^-2. The fuel cell performance obtained with this catalyst was lower, but compared favorably against a commercial Pt/C baseline. Analysis of fuel cell performance data confirmed that the lower fuel cell performance resulted largely from ohmic and mass transport losses within the unoptimized electrocatalyst layer.

Original language	English
Pages (from-to)	6109-6116
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	4
Issue number	11
DOIs	https://doi.org/10.1021/am3017416
State	Published - Nov 28 2012

Keywords

carbon corrosion
electrocatalyst support
metal oxide
noncarbon support
polymer electrolyte fuel cell

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10.1021/am3017416

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title = "SiO2-RuO2: A stable electrocatalyst support",

abstract = "High surface area SiO2-RuO2 (SRO) supports with various SiO2: RuO2 ratios were synthesized using a wet chemical method. The supports were catalyzed by depositing platinum nanoparticles on their surface. The synthesized materials were characterized by XRD, TEM, BET, and linear sweep voltammetry to study microstructure and properties. The electrochemical stability, electrochemical surface area, electrocatalytic activity and fuel cell performance were also measured. The optimal 1:1 mol ratio of SiO2-RuO2 (SRO-1) possessed a BET surface area of 305 m2/g and an electrical conductivity of 24 S/cm. This SRO support demonstrated 10-fold higher electrochemical stability than Vulcan XC-72R carbon when subjected to an aggressive accelerated stability test (AST) involving 10,000 potential cycles between 1 and 1.5 V. The mass activity of Pt-doped SRO-1 was 54 mA/mgPt, whereas its specific activity was 115 μA cmPt-2. The fuel cell performance obtained with this catalyst was lower, but compared favorably against a commercial Pt/C baseline. Analysis of fuel cell performance data confirmed that the lower fuel cell performance resulted largely from ohmic and mass transport losses within the unoptimized electrocatalyst layer.",

keywords = "carbon corrosion, electrocatalyst support, metal oxide, noncarbon support, polymer electrolyte fuel cell",

author = "Lo, \{Chih Ping\} and Vijay Ramani",

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doi = "10.1021/am3017416",

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journal = "ACS Applied Materials and Interfaces",

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T1 - SiO2-RuO2

T2 - A stable electrocatalyst support

AU - Lo, Chih Ping

AU - Ramani, Vijay

PY - 2012/11/28

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N2 - High surface area SiO2-RuO2 (SRO) supports with various SiO2: RuO2 ratios were synthesized using a wet chemical method. The supports were catalyzed by depositing platinum nanoparticles on their surface. The synthesized materials were characterized by XRD, TEM, BET, and linear sweep voltammetry to study microstructure and properties. The electrochemical stability, electrochemical surface area, electrocatalytic activity and fuel cell performance were also measured. The optimal 1:1 mol ratio of SiO2-RuO2 (SRO-1) possessed a BET surface area of 305 m2/g and an electrical conductivity of 24 S/cm. This SRO support demonstrated 10-fold higher electrochemical stability than Vulcan XC-72R carbon when subjected to an aggressive accelerated stability test (AST) involving 10,000 potential cycles between 1 and 1.5 V. The mass activity of Pt-doped SRO-1 was 54 mA/mgPt, whereas its specific activity was 115 μA cmPt-2. The fuel cell performance obtained with this catalyst was lower, but compared favorably against a commercial Pt/C baseline. Analysis of fuel cell performance data confirmed that the lower fuel cell performance resulted largely from ohmic and mass transport losses within the unoptimized electrocatalyst layer.

AB - High surface area SiO2-RuO2 (SRO) supports with various SiO2: RuO2 ratios were synthesized using a wet chemical method. The supports were catalyzed by depositing platinum nanoparticles on their surface. The synthesized materials were characterized by XRD, TEM, BET, and linear sweep voltammetry to study microstructure and properties. The electrochemical stability, electrochemical surface area, electrocatalytic activity and fuel cell performance were also measured. The optimal 1:1 mol ratio of SiO2-RuO2 (SRO-1) possessed a BET surface area of 305 m2/g and an electrical conductivity of 24 S/cm. This SRO support demonstrated 10-fold higher electrochemical stability than Vulcan XC-72R carbon when subjected to an aggressive accelerated stability test (AST) involving 10,000 potential cycles between 1 and 1.5 V. The mass activity of Pt-doped SRO-1 was 54 mA/mgPt, whereas its specific activity was 115 μA cmPt-2. The fuel cell performance obtained with this catalyst was lower, but compared favorably against a commercial Pt/C baseline. Analysis of fuel cell performance data confirmed that the lower fuel cell performance resulted largely from ohmic and mass transport losses within the unoptimized electrocatalyst layer.

KW - carbon corrosion

KW - electrocatalyst support

KW - metal oxide

KW - noncarbon support

KW - polymer electrolyte fuel cell

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U2 - 10.1021/am3017416

DO - 10.1021/am3017416

M3 - Article

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AN - SCOPUS:84870569406

SN - 1944-8244

VL - 4

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EP - 6116

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 11

ER -

SiO₂-RuO₂: A stable electrocatalyst support

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Keywords

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