5 years ago

AgIn dendrite catalysts for electrochemical reduction of CO2 to CO

AgIn dendrite catalysts for electrochemical reduction of CO2 to CO
In this work, the catalytic activities of electrodeposited Ag and AgIn bimetallic dendrites have been explored for electrochemical reduction of CO2 to CO. In the case of Ag dendrites, the Ag crystal structure was found to be affected by the deposition potential and showed different Ag(220)/Ag(111) ratios. The Faradaic efficiencies to produce CO increased as this ratio increased, whereas the partial current densities for CO generation were found to have a stronger relationship with the roughness of the Ag catalyst. The electrodeposition of AgIn was carried out to investigate the effect of addition of In and its content on the catalytic performance, while maintaining the dendritic morphology. The crystal structures of AgIn dendrites were found to vary with the amount of added In, demonstrating a linear increase in the ratio Ag(220)/Ag(111) with increasing In content and a positive impact on the production of CO. Furthermore, there was a competition between the suppression of the hydrogen evolution reaction (HER) vs. the decrement in the amount of active Ag with increasing addition of In. It was found that these complementary effects resulted in a superior CO Faradaic efficiency of AgIn dendrites with a volcano shaped curve based on the In content. The complementary effect on the catalytic activity could be extended to the various reduction potentials, indicating the significant effect of HER suppression at highly negative reduction potentials.

Publisher URL: www.sciencedirect.com/science

DOI: S0926337317306781

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.