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

Title: Carbon Dioxide Electroreduction using a Silver-Zinc Alloy [CO2 Electroreduction on a Ag-Zn Alloy]

Journal Article · · Energy Technology
 [1];  [2];  [1];  [1];  [1];  [1];  [3];  [3]
  1. Stanford Univ., Stanford, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

We report on CO2 electroreduction activity and selectivity of a polycrystalline AgZn foil in aqueous bicarbonate electrolyte. X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) measurements show that the alloy foil was slightly enriched in zinc both at the surface and in the bulk, with a surface alloy composition of 61.3±5.4 at % zinc and with Ag5Zn8 as the most prominent bulk phase. AgZn is active for CO2 reduction; CO is the main product, likely due to the weak CO binding energy of the surface, with methane and methanol emerging as minor products. Compared to pure silver and pure zinc foils, enhancements in activity and selectivity for methane and methanol are observed. A five-fold increase is observed in the combined partial current densities for methane and methanol at –1.43 V vs. the reversible hydrogen electrode (RHE), representing a four- to six-fold increase in faradaic efficiency. Here, such enhancements indicate the existence of a synergistic effect between silver and zinc at the surface of the alloy that contributes to the enhanced formation of further reduced products.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515; 1066515
OSTI ID:
1369412
Journal Information:
Energy Technology, Vol. 5, Issue 6; ISSN 2194-4288
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (32)

Heat of adsorption of carbon monoxide on zinc oxide pretreated by various methods
  • Giamello, Elio; Fubini, Bice
  • Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, Vol. 79, Issue 9 https://doi.org/10.1039/f19837901995
journal January 1983
CatApp: A Web Application for Surface Chemistry and Heterogeneous Catalysis journal December 2011
Understanding Trends in the Electrocatalytic Activity of Metals and Enzymes for CO 2 Reduction to CO journal January 2013
Electrocatalytic Conversion of Carbon Dioxide to Methane and Methanol on Transition Metal Surfaces journal August 2014
The influence of pre-oxidation on the adsorption of CO at A Zn(0001) surface: Characterisation of a weakly chemisorbed species by XPS and UPS journal January 1990
Insights into the electrocatalytic reduction of CO 2 on metallic silver surfaces journal January 2014
A Highly Selective Copper-Indium Bimetallic Electrocatalyst for the Electrochemical Reduction of Aqueous CO 2 to CO journal December 2014
Electrochemical reduction of CO2 on single crystal electrodes of silver Ag(111), Ag(100) and Ag(110) journal December 1997
High Selectivity for Ethylene from Carbon Dioxide Reduction over Copper Nanocube Electrocatalysts journal February 2015
Selective Electrochemical Reduction of Carbon Dioxide to Ethylene and Ethanol on Copper(I) Oxide Catalysts journal March 2015
Enhanced Electrochemical Methanation of Carbon Dioxide with a Dispersible Nanoscale Copper Catalyst journal September 2014
Active and Selective Conversion of CO 2 to CO on Ultrathin Au Nanowires journal November 2014
Activity Descriptors for CO 2 Electroreduction to Methane on Transition-Metal Catalysts journal January 2012
Electrodeposited Zn Dendrites with Enhanced CO Selectivity for Electrocatalytic CO 2 Reduction journal July 2015
Nickel–Gallium-Catalyzed Electrochemical Reduction of CO 2 to Highly Reduced Products at Low Overpotentials journal February 2016
Synthesis of thin film AuPd alloys and their investigation for electrocatalytic CO 2 reduction journal January 2015
Trends in electrochemical CO2 reduction activity for open and close-packed metal surfaces journal January 2014
Surface oxides on carbon and their analysis: a critical assessment journal February 2002
Effects of electrolyte, catalyst, and membrane composition and operating conditions on the performance of solar-driven electrochemical reduction of carbon dioxide journal January 2015
Potential-pH Diagram of Zinc and its Applications to the Study of Zinc Corrosion journal January 1951
Electrochemical CO2 reduction to formic acid on a Pd-based formic acid oxidation catalyst journal April 2015
Synergistic geometric and electronic effects for electrochemical reduction of carbon dioxide using gold–copper bimetallic nanoparticles journal September 2014
New insights into the electrochemical reduction of carbon dioxide on metallic copper surfaces journal January 2012
Prospects of CO2 Utilization via Direct Heterogeneous Electrochemical Reduction journal December 2010
CatApp: A Web Application for Surface Chemistry and Heterogeneous Catalysis journal December 2011
The adsorption of Xe and CO on Ag(111) journal March 1976
Aqueous CO 2 Reduction at Very Low Overpotential on Oxide-Derived Au Nanoparticles journal November 2012
Catalysts and Reaction Pathways for the Electrochemical Reduction of Carbon Dioxide journal September 2015
High Selectivity for Ethylene from Carbon Dioxide Reduction over Copper Nanocube Electrocatalysts journal February 2015
Bifunctional alloys for the electroreduction of CO 2 and CO journal January 2016
A selective and efficient electrocatalyst for carbon dioxide reduction journal January 2014
A Highly Selective Copper-Indium Bimetallic Electrocatalyst for the Electrochemical Reduction of Aqueous CO 2 to CO journal December 2014

Cited By (8)

Enhanced Electroreduction of Carbon Dioxide to Methanol Using Zinc Dendrites Pulse-Deposited on Silver Foam journal January 2019
Aqueous Electrochemical Reduction of Carbon Dioxide and Carbon Monoxide into Methanol with Cobalt Phthalocyanine journal September 2019
Enhanced Electroreduction of Carbon Dioxide to Methanol Using Zinc Dendrites Pulse‐Deposited on Silver Foam journal February 2019
Electrocatalytic Alloys for CO 2 Reduction journal December 2017
Rational Design of Ag‐Based Catalysts for the Electrochemical CO 2 Reduction to CO: A Review journal December 2019
Facet- and structure-dependent catalytic activity of cuprous oxide/polypyrrole particles towards the efficient reduction of carbon dioxide to methanol journal January 2018
Tuning the Products of CO 2 Electroreduction on a Ni 3 Ga Catalyst Using Carbon Solid Supports journal January 2018
Aqueous Electrochemical Reduction of Carbon Dioxide and Carbon Monoxide into Methanol with Cobalt Phthalocyanine journal November 2019