What question did this study set out to answer?

To design three-dimensional, catalyst-modified carbon–silica composite aerogels that establish continuous electronic and mass-transport pathways to enhance fuel-cell electrocatalytic activity.

January 5, 2002Nano Letters

Enhancing the Activity of Fuel-cell Reactions by Designing Three-dimensional Nanostructured Architectures: Catalyst-modified Carbon−Silica Composite Aerogels

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Authors

MAMichele L. AndersonUniversity of North Carolina at Chapel Hill RSR. M. StroudBrigham Young University DRDebra R. RolisonUnited States Naval Research Laboratory

Discussion

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Implication

Experimental study demonstrates a four-order-of-magnitude increase in methanol oxidation with platinum-modified carbon-silica aerogels, highlighting pathways to highly efficient fuel cells.

Key Points

To design three-dimensional, catalyst-modified carbon–silica composite aerogels that establish continuous electronic and mass-transport pathways to enhance fuel-cell electrocatalytic activity.
Synthesized composite aerogels by incorporating preformed catalyst-modified carbon powder into a silica sol to preserve both electronic conduction and continuous mesoporous transport pathways.
Prepared catalysts via direct adsorption of colloidal platinum sized to prevent entry into micropores, comparing performance against conventional impregnation techniques.
Annealed the platinum-modified aerogels under controlled temperatures and gas atmospheres to optimize platinum nanoparticle diameter between 3 nm and 4 nm.
Colloidal platinum-modified carbon–silica composite aerogels increased electrocatalytic activity for methanol oxidation by 4 orders of magnitude per gram of platinum compared to native platinum-modified carbon powder.
Catalysts formed through direct adsorption of colloidal platinum achieved higher mass-normalized activity than counterparts fabricated via conventional impregnation.
Controlled thermal annealing tuned platinum nanoparticle sizes to >3 nm and <4 nm, generating a further improvement in mass-normalized electrocatalytic performance.

Cite This Study

Anderson et al. (2002) studied this question.

synapsesocial.com/papers/6a72dcfeb0d581bd9f303ebb https://doi.org/10.1021/nl015707d

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January 5, 2002Nano Letters

Enhancing the Activity of Fuel-cell Reactions by Designing Three-dimensional Nanostructured Architectures: Catalyst-modified Carbon−Silica Composite Aerogels

View Full Paper

Ask AI

Bookmark

Authors

MAMichele L. AndersonUniversity of North Carolina at Chapel Hill RSR. M. StroudBrigham Young University DRDebra R. RolisonUnited States Naval Research Laboratory

Discussion

Member takes

Implication

Experimental study demonstrates a four-order-of-magnitude increase in methanol oxidation with platinum-modified carbon-silica aerogels, highlighting pathways to highly efficient fuel cells.

Key Points

To design three-dimensional, catalyst-modified carbon–silica composite aerogels that establish continuous electronic and mass-transport pathways to enhance fuel-cell electrocatalytic activity.
Synthesized composite aerogels by incorporating preformed catalyst-modified carbon powder into a silica sol to preserve both electronic conduction and continuous mesoporous transport pathways.
Prepared catalysts via direct adsorption of colloidal platinum sized to prevent entry into micropores, comparing performance against conventional impregnation techniques.
Annealed the platinum-modified aerogels under controlled temperatures and gas atmospheres to optimize platinum nanoparticle diameter between 3 nm and 4 nm.
Colloidal platinum-modified carbon–silica composite aerogels increased electrocatalytic activity for methanol oxidation by 4 orders of magnitude per gram of platinum compared to native platinum-modified carbon powder.
Catalysts formed through direct adsorption of colloidal platinum achieved higher mass-normalized activity than counterparts fabricated via conventional impregnation.
Controlled thermal annealing tuned platinum nanoparticle sizes to >3 nm and <4 nm, generating a further improvement in mass-normalized electrocatalytic performance.

Cite This Study

Anderson et al. (2002) studied this question.

synapsesocial.com/papers/6a72dcfeb0d581bd9f303ebb https://doi.org/10.1021/nl015707d

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