Templated fabrication of nanostructured NI brush for hydrogen evolution reaction

Sheng Chleh Lin, Yn Fan Chin, Pu-Wei Wu*, Yi Fan Hsieh, Cheng Yeou Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We fabricated a nanostructured brush by carrying out Ni deposition on a through-channel anodic aluminum oxide (AAO) template, followed by removal of the AAO skeleton. The AAO was prepared by a two-step aiiodizationprocess resulting In pore diameter and thickness of 350 nm and 40 μm, respectively. Subsequently, the AAO underwent an clcctroless deposition involving sensitization, activation, and Ni plating, in conjunction with polyethylene glycol used as the inhibitor to prevent premature closing of pore opening. After deliberate control in relevant parameters, we obtained a conformal Ni overcoat along every pore channel leading to a reduced average pore diameter of 78 nm. Afterward, the sample was immersed in a KOH solution to remove the AAO structure, forming freestanding Ni tubules in a brush configuration. The nanostructured brush revealed considerable enhancement for hydrogen evolution reaction in both current-potential polarization and galvanostatic measurements, which were attributed to the Increment in apparent surface area.

Original languageEnglish
Pages (from-to)2001-2007
Number of pages7
JournalJournal of Materials Research
Volume25
Issue number10
DOIs
StatePublished - 1 Oct 2010

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