skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Modification of CO2 Reduction Activity of Nanostructured Silver Electrocatalysts by Surface Halide Anions

Journal Article · · ACS Applied Energy Materials

This study describes the effect of halide anions (X = Cl, Br, I) immobilized on the surface of nanostructured silver electrocatalysts on the efficiency and the mechanism of CO2 reduction to CO in aqueous carbonate solutions. A simple oxidation–reduction cycle on Ag foil in the presence of halide anions produces high-surface-area nanostructured catalysts mainly composed of metallic Ag with a small amount of halide anions attached to the electrode surface (X–Ag) as demonstrated by XPS, XRD, and SEM studies. The activity of X–Ag electrocatalysts in 0.1 M NaHCO3 at pH 6.8 is significantly higher than that of Ag foil or Ag nanoparticles with comparable surface area and morphology. The activity enhancement is attributed to the formation of active catalytic sites, presumably Cl––Agn+ clusters on the surface of metallic Ag, as evidenced by XPS analysis. The activity of X–Ag catalysts is in the order Cl > Br > I, which is consistent with the proposed model of an active site. The Tafel analysis of electrochemical CO2 reduction points to the sensitivity of the mechanism of electrocatalysis on the nature of X.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1491130
Report Number(s):
BNL-210859-2019-JAAM
Journal Information:
ACS Applied Energy Materials, Vol. 2, Issue 1; ISSN 2574-0962
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 44 works
Citation information provided by
Web of Science

References (42)

Future CO 2 Emissions and Climate Change from Existing Energy Infrastructure journal September 2010
Powering the planet: Chemical challenges in solar energy utilization journal October 2006
Chemically and electrochemically catalysed conversion of CO2 to CO with follow-up utilization to value-added chemicals journal April 2018
Robust carbon dioxide reduction on molybdenum disulphide edges journal July 2014
CO 2 Electroreduction to Hydrocarbons on Carbon-Supported Cu Nanoparticles journal September 2014
Electrochemical reduction of CO2 by Cu2O-catalyzed carbon clothes journal May 2009
A Local Proton Source Enhances CO 2 Electroreduction to CO by a Molecular Fe Catalyst journal October 2012
Embedding Covalency into Metal Catalysts for Efficient Electrochemical Conversion of CO 2 journal August 2014
A review of catalysts for the electroreduction of carbon dioxide to produce low-carbon fuels journal January 2014
Electrochemical Reduction of CO 2 at Copper Nanofoams journal August 2014
Prospects of CO2 Utilization via Direct Heterogeneous Electrochemical Reduction journal December 2010
Electrochemical CO2 Reduction on Metal Electrodes book January 2008
Opportunities and Challenges in CO 2 Reduction by Gold- and Silver-Based Electrocatalysts: From Bulk Metals to Nanoparticles and Atomically Precise Nanoclusters journal January 2018
Electrochemical CO 2 reduction on Au surfaces: mechanistic aspects regarding the formation of major and minor products journal January 2017
Achieving Selective and Efficient Electrocatalytic Activity for CO 2 Reduction Using Immobilized Silver Nanoparticles journal October 2015
Evolution of silver to a better electrocatalyst: Water-assisted oxygen reduction reaction at silver chloride nanowires in alkaline solution journal June 2018
A review of the aqueous electrochemical reduction of CO2 to hydrocarbons at copper journal August 2006
Electrocatalytic Alloys for CO 2 Reduction journal December 2017
New challenges of electrokinetic studies in investigating the reaction mechanism of electrochemical CO 2 reduction journal January 2018
Nanostructured Materials for Heterogeneous Electrocatalytic CO 2 Reduction and their Related Reaction Mechanisms journal July 2017
Electrochemical reduction of carbon dioxide on flat metallic cathodes journal January 1997
Electrochemical Carbon Dioxide Reduction at Nanostructured Gold, Copper, and Alloy Materials journal March 2017
Nanostructured nonprecious metal catalysts for electrochemical reduction of carbon dioxide journal June 2016
Electroreduction of carbon monoxide to liquid fuel on oxide-derived nanocrystalline copper journal April 2014
Monodisperse Au Nanoparticles for Selective Electrocatalytic Reduction of CO 2 to CO journal October 2013
Nanoparticle Silver Catalysts That Show Enhanced Activity for Carbon Dioxide Electrolysis journal January 2013
Aqueous CO 2 Reduction at Very Low Overpotential on Oxide-Derived Au Nanoparticles journal November 2012
CO2 Reduction at Low Overpotential on Cu Electrodes Resulting from the Reduction of Thick Cu2O Films journal April 2012
Active Sites of Au and Ag Nanoparticle Catalysts for CO 2 Electroreduction to CO journal August 2015
Tin Oxide Dependence of the CO 2 Reduction Efficiency on Tin Electrodes and Enhanced Activity for Tin/Tin Oxide Thin-Film Catalysts journal January 2012
Effect of Chloride Anions on the Synthesis and Enhanced Catalytic Activity of Silver Nanocoral Electrodes for CO 2 Electroreduction journal August 2015
Insights into the electrocatalytic reduction of CO 2 on metallic silver surfaces journal January 2014
Topographic Changes of Polycrystalline Ag and Cu Electrodes in Acid Aqueous Solutions Resulting from a Prolonged Application of the Potential Reversal Technique journal July 1996
Underpotential Deposition at Single Crystal Surfaces of Au, Pt, Ag and Other Materials journal July 2001
Redox Pathways for HCOOH Decomposition over CeO 2 Surfaces journal June 2008
Fabrication of uniform Ag/TiO2 nanotube array structures with enhanced photoelectrochemical performance journal January 2010
Initial and final state effects in the ESCA spectra of cadmium and silver oxides journal October 1977
Chemical shifts of Auger lines, and the Auger parameter journal January 1975
A selective and efficient electrocatalyst for carbon dioxide reduction journal January 2014
A profile refinement method for nuclear and magnetic structures journal June 1969
XPS Studies on Emersed Silver Electrodes: Coverage and Bonding State of Specifically Adsorbed Chloride journal November 1990
Tuning the Catalytic Activity and Selectivity of Cu for CO 2 Electroreduction in the Presence of Halides journal February 2016

Cited By (4)

Catalyst–Electrolyte Interactions in Aqueous Reline Solutions for Highly Selective Electrochemical CO 2 Reduction journal November 2019
Rational Design of Ag‐Based Catalysts for the Electrochemical CO 2 Reduction to CO: A Review journal December 2019
An overview on the recent developments of Ag-based electrodes in the electrochemical reduction of CO 2 to CO journal January 2020
Catalyst–Electrolyte Interactions in Aqueous Reline Solutions for Highly Selective Electrochemical CO 2 Reduction journal December 2019