Journal of Physical Chemistry Letters
Journal of Physical Chemistry Letters
5 years ago

Phosphate Ion Functionalization of Perovskite Surfaces for Enhanced Oxygen Evolution Reaction

Phosphate Ion Functionalization of Perovskite Surfaces for Enhanced Oxygen Evolution Reaction
Jean-Marie Tarascon, Alan V. Chadwick, Alexis Grimaud, Chunzhen Yang, Wei Yin, Vanessa Pimenta, Leiting Zhang, Christel Laberty-Robert, Giannantonio Cibin, Dmitry Batuk
Recent findings revealed that surface oxygen can participate in the oxygen evolution reaction (OER) for the most active catalysts, which eventually triggers a new mechanism for which the deprotonation of surface intermediates limits the OER activity. We propose in this work a “dual strategy” in which tuning the electronic properties of the oxide, such as La1–xSrxCoO3−δ, can be dissociated from the use of surface functionalization with phosphate ion groups (Pi) that enhances the interfacial proton transfer. Results show that the Pi functionalized La0.5Sr0.5CoO3−δ gives rise to a significant enhancement of the OER activity when compared to La0.5Sr0.5CoO3−δ and LaCoO3. We further demonstrate that the Pi surface functionalization selectivity enhances the activity when the OER kinetics is limited by the proton transfer. Finally, this work suggests that tuning the catalytic activity by such a “dual approach” may be a new and largely unexplored avenue for the design of novel high-performance catalysts.

Publisher URL: http://dx.doi.org/10.1021/acs.jpclett.7b01504

DOI: 10.1021/acs.jpclett.7b01504

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.