Journal article
Hydrodynamics Change Tafel Slopes in Electrochemical CO2 Reduction on Copper
ACS energy letters, v 8(5), pp 2185-2192
12 May 2023
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The hydrodynamics of electrochemical CO2 reduction (CO2R) systems is an insufficiently investigated area of research that has broad implications on catalyst activity and selectivity. While most previous reports are limited to laminar and CO2-sparged systems, herein we address a wide range of hydrodynamics via electrolyte recirculation systems. We find that increased hydrodynamics at the electrode surface results directly in changes to the ethylene and methane Tafel slopes, demonstrating that mass transport is on equal footing with catalyst active sites in determining reaction mechanisms and the ensuing product distribution. Mass transport is traditionally considered to be in the purview of systems-level engineering, yet the present work shows that CO2R mechanistic work must be considered in the context of the mass transport conditions. We extend our analysis to organic coatings, demonstrating that the films shield the active sites from variability in hydrodynamics and increase the residence time of CO so that it may be further reduced to desirable products.
Metrics
1 Record Views
Details
- Title
- Hydrodynamics Change Tafel Slopes in Electrochemical CO2 Reduction on Copper
- Creators
- Nicholas B. Watkins - California Institute of TechnologyZachary J. Schiffer - California Institute of TechnologyYungchieh Lai - California Institute of TechnologyCharles B. Musgrave - California Institute of TechnologyHarry A. Atwater - California Institute of TechnologyWilliam A. Goddard - California Institute of TechnologyTheodor Agapie - California Institute of TechnologyJonas C. Peters - California Institute of TechnologyJohn M. Gregoire - California Institute of Technology
- Publication Details
- ACS energy letters, v 8(5), pp 2185-2192
- Publisher
- Amer Chemical Soc
- Number of pages
- 8
- Grant note
- Resnick Sustainability Institute at Caltech DE-SC0021266 / U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Fuels from Sunlight Hub; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:000973244500001
- Scopus ID
- 2-s2.0-85154044454
- Other Identifier
- 991022207179104721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
Source: SDGs in the Output
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Electrochemistry
- Energy & Fuels
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology