RuO sub(2)-SiO sub(2) mixed oxides as corrosion-resistant catalyst supports for polymer electrolyte fuel cells
The objective of this study was to evaluate the suitability of mixed oxides of silica (SiO sub(2)) and ruthenia (RuO sub(2)) for use as electrocatalyst supports in polymer electrolyte fuel cells (PEFCs). The RuO sub(2):SiO sub(2) oxides were synthesized in three different molar ratios (0.1:0.9, 0.3:...
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| Veröffentlicht in: | Applied catalysis. B, Environmental Environmental, 2013-07, Vol.138-139, p.43-50 |
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| container_title | Applied catalysis. B, Environmental |
| container_volume | 138-139 |
| creator | Kumar, Amod Ramani, Vijay K |
| description | The objective of this study was to evaluate the suitability of mixed oxides of silica (SiO sub(2)) and ruthenia (RuO sub(2)) for use as electrocatalyst supports in polymer electrolyte fuel cells (PEFCs). The RuO sub(2):SiO sub(2) oxides were synthesized in three different molar ratios (0.1:0.9, 0.3:0.7 and 0.5:0.5). Of these formulations, RuO sub(2)-SiO sub(2) (0.5:0.5) displayed high BET surface area ( similar to 290 m super(2) g super(-1)), high electronic conductivity (>5 S cm super(-1)), and outstanding electrochemical stability (change in double layer capacitance of |
| doi_str_mv | 10.1016/j.apcatb.2013.02.015 |
| format | Article |
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The RuO sub(2):SiO sub(2) oxides were synthesized in three different molar ratios (0.1:0.9, 0.3:0.7 and 0.5:0.5). Of these formulations, RuO sub(2)-SiO sub(2) (0.5:0.5) displayed high BET surface area ( similar to 290 m super(2) g super(-1)), high electronic conductivity (>5 S cm super(-1)), and outstanding electrochemical stability (change in double layer capacitance of <10% compared to 360% for Vulcan XC72 carbon upon rigorous accelerated potential cycling tests that mimic automotive drive cycles). The RuO sub(2)-SiO sub(2) (0.5:0.5) support material was subsequently catalyzed by deposition of 24 wt% of platinum nanoparticles. The resultant electrocatalyst yielded a mass activity of 50 mA mg sub(Pt) super(-1) and an area specific activity of 156.3 mu A cm super(-2) at 0.9 V vs. RHE when tested in a fuel cell operating at 80 degree C and 75% relative humidity.</description><identifier>ISSN: 0926-3373</identifier><identifier>DOI: 10.1016/j.apcatb.2013.02.015</identifier><language>eng</language><subject>Carbon ; Electrocatalysts ; Electrolytes ; Electronics ; Fuel cells ; Mixed oxides ; Relative humidity ; Silicon dioxide</subject><ispartof>Applied catalysis. 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Of these formulations, RuO sub(2)-SiO sub(2) (0.5:0.5) displayed high BET surface area ( similar to 290 m super(2) g super(-1)), high electronic conductivity (>5 S cm super(-1)), and outstanding electrochemical stability (change in double layer capacitance of <10% compared to 360% for Vulcan XC72 carbon upon rigorous accelerated potential cycling tests that mimic automotive drive cycles). The RuO sub(2)-SiO sub(2) (0.5:0.5) support material was subsequently catalyzed by deposition of 24 wt% of platinum nanoparticles. The resultant electrocatalyst yielded a mass activity of 50 mA mg sub(Pt) super(-1) and an area specific activity of 156.3 mu A cm super(-2) at 0.9 V vs. RHE when tested in a fuel cell operating at 80 degree C and 75% relative humidity.</description><subject>Carbon</subject><subject>Electrocatalysts</subject><subject>Electrolytes</subject><subject>Electronics</subject><subject>Fuel cells</subject><subject>Mixed oxides</subject><subject>Relative humidity</subject><subject>Silicon dioxide</subject><issn>0926-3373</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqVjcFKAzEURbOo0Kr9AxdvWReTviQ2ddaiuBNa9yWdvoGUzCTmJdD-vSPoB7i658K5XCEeFEqFyq7P0qXOlaPUqIxELVFtZmKBrbaNMVszF7fMZ0TURj8vxLirH8D1uNKPzd7_IQz-QieIF38iBsfQxZwj-zg2mdhzcWOB6cWFK5dpk1LMhaGPGVIM14EyUKCu5KkUgr5SgI5C4Htx07vAtPzNO7F6e_18eW9Sjl-VuBwGzz-mGylWPii7VU-tbVtr_qF-AzUvVGg</recordid><startdate>20130701</startdate><enddate>20130701</enddate><creator>Kumar, Amod</creator><creator>Ramani, Vijay K</creator><scope>7SE</scope><scope>7SP</scope><scope>7SR</scope><scope>7SU</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>H8D</scope><scope>JG9</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>20130701</creationdate><title>RuO sub(2)-SiO sub(2) mixed oxides as corrosion-resistant catalyst supports for polymer electrolyte fuel cells</title><author>Kumar, Amod ; Ramani, Vijay K</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_miscellaneous_16714969963</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Carbon</topic><topic>Electrocatalysts</topic><topic>Electrolytes</topic><topic>Electronics</topic><topic>Fuel cells</topic><topic>Mixed oxides</topic><topic>Relative humidity</topic><topic>Silicon dioxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kumar, Amod</creatorcontrib><creatorcontrib>Ramani, Vijay K</creatorcontrib><collection>Corrosion Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Environmental Engineering Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Applied catalysis. B, Environmental</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kumar, Amod</au><au>Ramani, Vijay K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>RuO sub(2)-SiO sub(2) mixed oxides as corrosion-resistant catalyst supports for polymer electrolyte fuel cells</atitle><jtitle>Applied catalysis. B, Environmental</jtitle><date>2013-07-01</date><risdate>2013</risdate><volume>138-139</volume><spage>43</spage><epage>50</epage><pages>43-50</pages><issn>0926-3373</issn><abstract>The objective of this study was to evaluate the suitability of mixed oxides of silica (SiO sub(2)) and ruthenia (RuO sub(2)) for use as electrocatalyst supports in polymer electrolyte fuel cells (PEFCs). The RuO sub(2):SiO sub(2) oxides were synthesized in three different molar ratios (0.1:0.9, 0.3:0.7 and 0.5:0.5). Of these formulations, RuO sub(2)-SiO sub(2) (0.5:0.5) displayed high BET surface area ( similar to 290 m super(2) g super(-1)), high electronic conductivity (>5 S cm super(-1)), and outstanding electrochemical stability (change in double layer capacitance of <10% compared to 360% for Vulcan XC72 carbon upon rigorous accelerated potential cycling tests that mimic automotive drive cycles). The RuO sub(2)-SiO sub(2) (0.5:0.5) support material was subsequently catalyzed by deposition of 24 wt% of platinum nanoparticles. The resultant electrocatalyst yielded a mass activity of 50 mA mg sub(Pt) super(-1) and an area specific activity of 156.3 mu A cm super(-2) at 0.9 V vs. RHE when tested in a fuel cell operating at 80 degree C and 75% relative humidity.</abstract><doi>10.1016/j.apcatb.2013.02.015</doi></addata></record> |
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| ispartof | Applied catalysis. B, Environmental, 2013-07, Vol.138-139, p.43-50 |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Carbon Electrocatalysts Electrolytes Electronics Fuel cells Mixed oxides Relative humidity Silicon dioxide |
| title | RuO sub(2)-SiO sub(2) mixed oxides as corrosion-resistant catalyst supports for polymer electrolyte fuel cells |
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