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Operando Surface-Enhanced Infrared Spectroscopy Connects Interfacial Dynamics with Reaction Kinetics During Electrochemical CO2 Reduction on Copper

Journal Article · · ACS Catalysis
 [1];  [2];  [1];  [3];  [4];  [1];  [1];  [5];  [1];  [6];  [1]
  1. Stanford Univ., CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). SUNCAT Center for Interface Science and Catalysis
  2. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). SUNCAT Center for Interface Science and Catalysis; Stanford Univ., CA (United States)
  3. Stanford Univ., CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). SUNCAT Center for Interface Science and Catalysis; Ulsan National Institute of Science and Technology (UNIST), Ulsan (Korea, Republic of)
  4. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  5. Ulsan National Institute of Science and Technology (UNIST), Ulsan (Korea, Republic of)
  6. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). SUNCAT Center for Interface Science and Catalysis
The reaction microenvironment plays a key role in dictating the selectivity of electrochemical CO2 reduction. However, understanding the chemical nature of this microenvironment under operating conditions remains a substantial challenge. For this study, we employed attenuated total reflectance surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) in operando for simultaneous measurements of reaction kinetics and concentrations of reactants and intermediates at the reaction interface, all under controlled mass transport conditions. These operando measurements enable direct correlations between the reaction microenvironment, mass transport, and kinetics for a Cu electrocatalyst, such as higher local concentrations of CO2 under faster mass transport corresponding to higher rates of CO2 reduction. We observed that faster mass transport decreased the *CO coverage at less negative potentials (-0.6 VRHE) and increased the *CO coverage at more negative potentials (-1.1 VRHE). We developed a transport-coupled kinetic model that captures these spectroscopic observations and provides insight into the processes controlling interfacial concentrations of reactants and intermediates, aiding future efforts toward tailoring reaction microenvironments.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
Grant/Contract Number:
AC52-07NA27344; SC0021266
OSTI ID:
2497909
Report Number(s):
LLNL--JRNL-866547; 1101456
Journal Information:
ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 1 Vol. 15; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (42)

Gastight rotating cylinder electrode: Toward decoupling mass transport and intrinsic kinetics in electrocatalysis journal January 2022
C−C Coupling Is Unlikely to Be the Rate‐Determining Step in the Formation of C 2+ Products in the Copper‐Catalyzed Electrochemical Reduction of CO journal November 2021
Electrochemical Flow Reactor Design Allows Tunable Mass Transport Conditions for Operando Surface Enhanced Infrared Absorption Spectroscopy journal July 2023
Surface-Enhanced Infrared Absorption book January 2006
Calculation for the cathode surface concentrations in the electrochemical reduction of CO2 in KHCO3 solutions journal October 2005
Diffusion coefficients of neon, krypton, xenon, carbon monoxide and nitric oxide in water at 10–60°C journal October 1968
Infrared spectrum of carbon dioxide in aqueous solution journal October 1992
Limiting diffusion currents in hydrodynamic voltammetry journal June 1973
Crystal facet-dependent electrocatalytic performance of metallic Cu in CO2 reduction reactions journal August 2022
Microenvironment engineering of gas-involving energy electrocatalysis and device applications journal September 2024
Recent applications of in situ ATR-IR spectroscopy in interfacial electrochemistry journal February 2017
ATR-SEIRAS for time-resolved studies of electrode–electrolyte interfaces journal October 2022
The importance of pH in controlling the selectivity of the electrochemical CO2 reduction journal December 2020
Effects of mass transfer on the electrocatalytic CO 2 reduction on Cu journal June 2017
Microenvironment engineering for guiding spatially and epitaxially uniform lithium plating in lithium metal batteries journal August 2023
Measurement of the diffusion coefficients of [Ru(NH3)6]3+ and [Ru(NH3)6]2+ in aqueous solution using microelectrode double potential step chronoamperometry journal March 2011
Tailoring a Three-Phase Microenvironment for High-Performance Oxygen Reduction Reaction in Proton Exchange Membrane Fuel Cells journal November 2020
General Techno-Economic Analysis of CO 2 Electrolysis Systems journal February 2018
Spectroscopic Observation of Reversible Surface Reconstruction of Copper Electrodes under CO 2 Reduction journal May 2017
Understanding the Effect of *CO Coverage on C–C Coupling toward CO2 Electroreduction journal April 2022
Nanoporous Silver Film Fabricated by Oxygen Plasma: A Facile Approach for SERS Substrates journal August 2016
Infrared Analysis of Interfacial Phenomena during Electrochemical Reduction of CO2 over Polycrystalline Copper Electrodes journal June 2020
Product Distribution Control Guided by a Microkinetic Analysis for CO Reduction at High-Flux Electrocatalysis Using Gas-Diffusion Cu Electrodes journal January 2023
Facet Dependence of CO 2 Reduction Paths on Cu Electrodes journal December 2015
Examination of Near-Electrode Concentration Gradients and Kinetic Impacts on the Electrochemical Reduction of CO 2 using Surface-Enhanced Infrared Spectroscopy journal April 2018
Role of H 2 O in CO 2 Electrochemical Reduction As Studied in a Water-in-Salt System journal July 2019
Hydrodynamics Change Tafel Slopes in Electrochemical CO2 Reduction on Copper journal April 2023
Particle Size Effects in the Catalytic Electroreduction of CO 2 on Cu Nanoparticles journal May 2014
In Situ ATR–SEIRAS of Carbon Dioxide Reduction at a Plasmonic Silver Cathode journal May 2020
Electrocatalytic CO2-to-C2+ with Ampere-Level Current on Heteroatom-Engineered Copper via Tuning *CO Intermediate Coverage journal August 2022
Negative Reaction Order for CO during CO2 Electroreduction on Au journal August 2024
Promoter Effects of Alkali Metal Cations on the Electrochemical Reduction of Carbon Dioxide journal August 2017
In Situ Infrared Spectroscopy Reveals Persistent Alkalinity near Electrode Surfaces during CO 2 Electroreduction journal September 2019
Diffusion Coefficients and Viscosities of CO 2 + H 2 O, CO 2 + CH 3 OH, NH 3 + H 2 O, and NH 3 + CH 3 OH Liquid Mixtures journal January 1996
Enhancing carbon dioxide gas-diffusion electrolysis by creating a hydrophobic catalyst microenvironment journal January 2021
Molecular tuning of CO2-to-ethylene conversion journal November 2019
Exploring mesoscopic mass transport effects on electrocatalytic selectivity journal June 2024
Surface-enhanced infrared absorption spectroscopy journal September 2023
Understanding cation effects in electrochemical CO 2 reduction journal January 2019
Rational design of local microenvironment for electrocatalytic water splitting journal January 2024
New insights into the electrochemical reduction of carbon dioxide on metallic copper surfaces journal January 2012
The Solubility of Carbon Dioxide in Water at Low Pressure journal November 1991