Under-water superaerophobic pine-shaped Pt nanoarray electrode for ultrahigh-performance hydrogen evolution

Yingjie Li, Haichuan Zhang, Tianhao Xu, Zhiyi Lu, Xiaochao Wu, Pengbo Wan, Xiaoming Sun, Lei Jiang

Research output: Contribution to journalArticleResearchpeer-review

264 Citations (Scopus)

Abstract

A pine-shaped Pt nanostructured electrode with under-water superaerophobicity for ultrahigh and steady hydrogen evolution reaction (HER) performance is successfully fabricated by a facile and easily scalable electrodeposition technique. Due to the lower bubble adhesive force (11.5 ± 1.2 μN), the higher bubble contact angle (161.3°± 3.4°) in aqueous solution, and the smaller size of bubbles release for pine-shaped Pt nanostructured electrode, the incomparable under-water superaerophobicity for final repellence of bubbles from submerged surface with ease, is successfully achieved, compared to that for nanosphere electrode and for Pt flat electrode. With the merits of superior under-water superaerophobicity and excellent nanoarray morphology, pine-shaped Pt nanostructured electrode with the ultrahigh electrocatalytic HER performance, excellent durability, no obvious current fluctuation, and dramatically fast current density increase at overpotential range (3.85 mA mV-1, 2.55 and 13.75 times higher than that for nanosphere electrode and for Pt flat electrode, respectively), is obtained, much superior to Pt nanosphere and flat electrodes. The successful introduction of under-water superaerophobicity to in-time repel as-formed H2 bubbles may open up a new pathway for designing more efficient electrocatalysts with potentially practical utilization in the near future.

Original languageEnglish
Pages (from-to)1737-1744
Number of pages8
JournalAdvanced Functional Materials
Volume25
Issue number11
DOIs
Publication statusPublished - 18 Mar 2015
Externally publishedYes

Keywords

  • Bubble release
  • Hydrogen evolution reaction
  • Low adhesion surfaces
  • Nanoarrays
  • Superaerophobicity

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