What question did this study set out to answer?

To optimize the three-dimensional architecture of platinum-nickel rhombic dodecahedral nanoframes to maximize oxygen reduction activity and minimize platinum consumption.

August 8, 2017Journal of the American Chemical SocietyOpen Access

Control of Architecture in Rhombic Dodecahedral Pt–Ni Nanoframe Electrocatalysts

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To optimize the three-dimensional architecture of platinum-nickel rhombic dodecahedral nanoframes to maximize oxygen reduction activity and minimize platinum consumption.
Adjusted the stoichiometry of platinum and nickel precursors during chemical synthesis to control three-dimensional platinum anisotropy.
Synthesized two distinct nanostructures: conventional hollow nanoframes and novel excavated nanoframes containing internal two-dimensional sheets.
Assessed electrocatalytic oxygen reduction reaction kinetics, comparing specific activity and mass activity against commercial platinum-on-carbon catalysts.
Excavated nanoframes demonstrated approximately 10-fold higher specific activity and approximately 6-fold higher mass activity for the oxygen reduction reaction compared to commercial platinum on carbon.
Excavated nanoframes achieved double the mass activity of completely hollow nanoframes.
Enhanced electrocatalytic performance was driven by near-surface nickel enrichment and two-dimensional inner sheets that minimized buried, inaccessible platinum atoms.

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Implication

Experimental study demonstrates enhanced catalytic performance in excavated platinum-nickel nanoframes, highlighting a strategy to reduce expensive platinum utilization in fuel cells.

Cite This Study

Becknell et al. (2017) studied this question.

synapsesocial.com/papers/6a99123255be1aa440bd55d5 https://doi.org/10.1021/jacs.7b05584

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Implication

Experimental study demonstrates enhanced catalytic performance in excavated platinum-nickel nanoframes, highlighting a strategy to reduce expensive platinum utilization in fuel cells.

Control of Architecture in Rhombic Dodecahedral Pt–Ni Nanoframe Electrocatalysts

Key Points

Discussion

Implication

Cite This Study

Control of Architecture in Rhombic Dodecahedral Pt–Ni Nanoframe Electrocatalysts

Key Points

Discussion

Implication

Cite This Study

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