ChemCatChem
ChemCatChem
4 years ago

Thin-Layered Cobalt-Based Catalysts on Stainless-Steel Microfibers for the Efficient Electrolysis of Water

Thin-Layered Cobalt-Based Catalysts on Stainless-Steel Microfibers for the Efficient Electrolysis of Water
Insu Kim, Yujin Gu, Yoon Sung Nam
Herein, we introduce a highly catalytic core–shell microfiber electrode based on a cobalt oxygen-evolving catalyst (Co-OEC) electrodeposited on a three-dimensional (3 D) mat of stainless-steel (SS) microfibers. The resulting core–shell microfibers (Co-MF) with a catalytic shell exhibit a turnover frequency and a current density that are much higher than those of a conventional Co-OEC on a flat SS foil (Co-F) at neutral pH. The onset potential of the catalytic wave of Co-MF is also appreciably lower than that of Co-F owing to a combination of the higher surface activity of the Co-OEC and the enhanced local electric field in the 3 D network of the metal microfibers. This study suggests that cost-effective, stable, and earth-abundant SS microfibers can be a promising substrate to enhance the surface activity of water-oxidation electrocatalysts. True as steel: We report the efficient electrolysis of water by cobalt-based water-oxidation catalysts electrodeposited on a 3 D mat of stainless-steel microfibers to form a core–shell structure. Owing to the high surface activity of the cobalt-based catalysts and an enhanced local electric field, the core–shell catalysts exhibit exceedingly high catalytic performance for water oxidation at a neutral pH.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/cctc.201700382

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.