Suppressing buoyant force: New avenue for long-term durability of oxygen evolution catalysts

Sungsoon Kim, Changui Ahn, Yoonjun Cho, Gayea Hyun, Seokwoo Jeon, Jong Hyeok Park

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Recent progress in the development of water oxidation electrocatalysts has mainly focused on achieving high performance in a single measurement, while the importance of durability has not yet been deeply studied. Additionally, oxygen evolution reaction (OER) involves a phase transition from a liquid to a gas, and thus, the removal of the generated oxygen bubble is an important factor for improving the activity or maintaining the performance. In this study, 3D ordered nanoporous nickel electrode is synthesized with a thickness of 5 µm by using a templating method composed of proximity field nanopatterning (PnP) and electrodeposition followed by introduction of NiFe(OH)2 on the nickel electrode to increase the OER activity. The unique nanopore array structure of the electrode has advantages of not only an enlarged active surface area but also the fast removal of oxygen bubbles by spatial confinement effect. Consequently, the NiFe-decorated 3D ordered nanoporous nickel electrode shows a highly efficient oxygen-evolving ability with a turnover frequency of 2.9 s−1 and an ultralong durability of 300 h.

Original languageEnglish
Pages (from-to)184-191
Number of pages8
JournalNano Energy
Volume54
DOIs
Publication statusPublished - 2018 Dec

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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