Inhibition of Surface Chemical Moieties by Tris(hydroxymethyl)aminomethane: A Key to Understanding Oxygen Reduction on Iron-Nitrogen-Carbon Catalysts

Santoro, Carlo

Abstract

© 2018 American Chemical Society. The effect of tris(hydroxymethyl)aminomethane (Tris) on the activity of metal-nitrogen-carbon (M-N-C) platinum metal group-free (PGM-free) catalysts for oxygen reduction reaction (ORR) is studied. Electrochemical tests performed in the acidic and alkaline electrolyte and comparison between electrochemical observations for metal-free and metal-containing catalysts along with density functional calculations showed the multiplex mechanism of oxygen reduction in which numerous species perform partial and full reduction of oxygen to peroxide or water, respectively. The important role of protons in the mechanism of oxygen reduction is highlighted.

Citation

Santoro, C. (2018). Inhibition of Surface Chemical Moieties by Tris(hydroxymethyl)aminomethane: A Key to Understanding Oxygen Reduction on Iron-Nitrogen-Carbon Catalysts. ACS Applied Energy Materials, 1(5), 1942-1949. https://doi.org/10.1021/acsaem.8b00020

• Journal Article Type: Article
• Acceptance Date: Apr 10, 2018
• Publication Date: May 29, 2018
• Deposit Date: Apr 18, 2018
• Journal: ACS Applied Energy Materials
• Print ISSN: 2574-0962
• Electronic ISSN: 2574-0962
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 1
• Issue: 5
• Pages: 1942-1949
• DOI: https://doi.org/10.1021/acsaem.8b00020
• Keywords: platinum group metal-free electrocatalyst, transition metal−nitrogen-carbon catalysts, oxygen reduction reaction,; active site poisoning, ORR inhibition, probing active sites
• Public URL: https://uwe-repository.worktribe.com/output/869726
• Publisher URL: http://dx.doi.org/10.1021/acsaem.8b00020
• Additional Information: Additional Information : This is the author's accepted version. The final published version is available here: http://dx.doi.org/10.1021/acsaem.8b00020.