5 years ago

Interface Engineering in Nanostructured Nickel Phosphide Catalyst for Efficient and Stable Water Oxidation

Interface Engineering in Nanostructured Nickel Phosphide Catalyst for Efficient and Stable Water Oxidation
Rafal E. Dunin-Borkowski, Kirill Kovnir, Marc Heggen, Xian-Kui Wei, Yury V. Kolen’ko, Dmitri Y. Petrovykh, Liliana P. L. Gonçalves, Junyuan Xu, Bryan Owens-Baird, José Diogo Costa, Soraia P. S. Fernandes, José Luis Lado
An approach to significantly enhance the performance of the cost-effective nickel phosphide catalyst for electrochemical water oxidation has been developed via interfacing with Mg oxide-hydroxide. We have synthesized Ni2P nanoparticles anchored on Mg2O(OH)2-like phase supported on carbon paper. During the oxygen evolution reaction, the well-defined Ni2P nanoparticles serve as precursors for the immediate formation of active and stable nanostructured nickel hydroxide catalyst. As the anode for the oxygen evolution reaction in an alkaline electrolyte, the electrode shows a modest Tafel slope of 48 mV dec–1 and a large turnover frequency of 0.05 s–1 at an overpotential of 0.4 V. Microstructure and composition studies of the catalyst suggest that interfacial strain between Mg- and Ni-containing phases is responsible for high catalytic activity. A significant increase in catalytic activity upon the combination of magnesium compound and transition-metal phosphide suggests an interesting strategy for the controlled and reproducible preparation of active Earth-abundant oxygen-evolving catalysts.

Publisher URL: http://dx.doi.org/10.1021/acscatal.7b01954

DOI: 10.1021/acscatal.7b01954

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.