Catalysis Today
Catalysis Today
5 years ago

Anion dependent CO/H2 production ratio from CO2 reduction on Au electro-catalyst

Anion dependent CO/H2 production ratio from CO2 reduction on Au electro-catalyst
In this study, we first demonstrate that CO production selectivity from CO2 on Au electro-catalyst depends on the type of electrolyte anion. Comparing the faradaic efficiencies of H2, HCOO− and CO in the presence of different anions such as Cl−, HPO4 2−, SO4 2− and HCO3 − at constant potential of −0.7V (vs. RHE), we observe that the CO/H2 ratio could be enhanced due to strongly adsorbed anion such as Cl−. Although HPO4 2− is more strongly adsorbed than SO4 2− and HCO3 − on the surface of electrode, CO2 reduction in HPO4 2− containing solution exhibited a minimum faradaic efficiency of CO (11%) but a maximum faradaic efficiency of H2 (70%). Based on physicochemical analytical tools (LSV, EIS, SEM, XPS and XRD) and according to previous studies, we conclude that the product distribution is associated with distinct properties caused by characteristic of each anion when adsorbed on the electrode surface such as specific adsorption strength and intrinsic characteristic of anions.

Publisher URL: www.sciencedirect.com/science

DOI: S092058611730384X

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.