ScholarWorks@숙명여자대학교

초록

Nanoporous structured electrodes are promising platforms for efficient electrocatalysts and sensors but often suffer from mass-transport limitations within their nanopore networks. Here, we introduce patterned nanoporous gold (P-NPG) electrodes fabricated by nanospherical-lens lithography (NLL), in which nanoporous Au islands of a few hundred nanometers in size are periodically arranged with tunable spacings (1, 2, and 5 mu m), over a large area. The planar regions between the nanoporous islands act as channels that facilitate reactant mass transport, promoting more effective utilization of the nanoporous gold surface compared with conventional, uniformly coated NPG electrodes. Alcohol electro-oxidation of methanol, ethanol, and 1-propanol in alkaline media demonstrates that P-NPG electrodes exhibit enhanced current density per unit area relative to uniform NPG electrodes. These results highlight NLL -based mesoscale patterning as an effective strategy to improve mass transport and catalytic utilization in nanoporous gold electrodes.

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