Standing mesochannels: mesoporous PdCu films with vertically aligned mesochannels from nonionic micellar solutions

Date
2018
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Source Title
ACS Applied Materials and Interfaces
Print ISSN
1944-8244
Electronic ISSN
1944-8252
Publisher
American Chemical Society
Volume
10
Issue
47
Pages
40623 - 40630
Language
English
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Abstract

Mesoporous bimetallic palladium (Pd) alloy films with mesochannels perpendicularly aligned to the substrate are expected to show superior electrocatalytic activity and stability. The perpendicular mesochannels allow small molecules to efficiently access the active sites located not only at the surface but also within the film because of low diffusion resistance. When compared to pure Pd films, alloying with a secondary metal such as copper (Cu) is cost-effective and promotes resistance against adventitious poisoning through intermediate reactions known to impair the electrocatalytic performance. Here, we report the synthesis of mesoporous PdCu films by electrochemical deposition in nonionic micellar solutions. The mesoporous structures are vertically aligned on the substrate, and the final content of Pd and Cu can be adjusted by tuning the initial precursor molar ratio in the electrolyte solution.

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