Metal-ligand catalysts for selective promotion of electrochemical CO2RR

US11697663B2 · kind B2 · utility

Assignee

• The Regents of the University of California · US

Inventors

• Jeffrey S. Derrick · Oakland, US
• Matthias Loipersberger · Berkeley, US
• Jeffrey R. Long · Oakland, US
• Martin Head-Gordon · Berkeley, US
• Christopher J. Chang · Berkeley, US

Key dates

• Filing date: Feb 1, 2021
• Grant date: Jul 11, 2023
• Expiry date: Sep 25, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/842
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The electrochemical carbon dioxide reduction reaction (CO2RR) provides opportunities to synthesize value-added products from this greenhouse gas in a sustainable manner. Efficient catalysts for this reaction are provided that selectively drive CO2 reduction over the thermodynamic and kinetically competitive hydrogen evolution reaction (HER) in organic or aqueous electrolytes. The catalysts are metal-polypyridyl coordination complexes of a redox non-innocent terpyridine-based pentapyridine ligand and a first-row transition metal. The metal-ligand cooperativity in [Fe(tpyPY2Me)]2+ drives the electrochemical reduction of CO2 to CO at low overpotentials with high selectivity for CO2RR (>90%).