Electrochemical oxygen reduction to hydrogen peroxide at practical rates in strong acidic media
Rice University · The University of Texas at Austin
Abstract
Abstract Electrochemical oxygen reduction to hydrogen peroxide (H 2 O 2 ) in acidic media, especially in proton exchange membrane (PEM) electrode assembly reactors, suffers from low selectivity and the lack of low-cost catalysts. Here we present a cation-regulated interfacial engineering approach to promote the H 2 O 2 selectivity (over 80%) under industrial-relevant generation rates (over 400 mA cm −2 ) in strong acidic media using just carbon black catalyst and a small number of alkali metal cations, representing a 25-fold improvement compared to that without cation additives. Our density functional theory simulation suggests a “shielding effect” of alkali metal cations which squeeze away the…
Citation impact
- FWCI
- 12.86
- Percentile
- 100%
- References
- 44
Authors
7Topics & keywords
- Catalysis
- Hydrogen peroxide
- Electrolyte
- Electrochemistry
- Inorganic chemistry
- Alkali metal
- Chemistry
- Selectivity