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Effect of nanostructured carbon support on copper electrocatalytic activity toward CO2 electroreduction to hydrocarbon fuels

Journal Article · · Catalysis Today
 [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [3]
  1. Naval Research Lab. (NRL), Washington, DC (United States)
  2. Univ. of Oxford (United Kingdom)
  3. Drexel Univ., Philadelphia, PA (United States)

The effect of support on electrocatalytic activity of Cu nanoparticles (NPs) towards CO2 electroreduction to hydrocarbon fuels (CH4 and C2H4) is investigated for three types of nanostructured carbons: single wall carbon nanotubes (SWNT), graphene (GP) and onion-like carbon (OLC). Cu/SWNT, Cu/GP and Cu/OLC composite catalysts are synthesized and characterized by X-Ray diffraction analysis, transmission electron microscopy and electrochemical surface area measurements. Electrocatalytic activities of the synthesized materials, as measured in an electrochemical cell connected to a gas chromatograph, are compared to that of Cu NPs supported on Vulcan carbon. All four catalysts demonstrate higher activity towards C2H4 generation vs CH4, with production of the latter mostly suppressed on Cu NPs supported on nanostructured substrates. Onset potentials for C2H4 vs CH4 generation are shifted positively by 200 mV for Cu/SWNT, Cu/GP, and Cu/OLC catalysts. The Cu/OLC catalyst is found to be superior to the other two nanostructured catalysts in terms of stability, activity and selectivity towards C2H4 generation. Its faradaic efficiency reached 60% at -1.8 V vs Ag/AgCl. The enhanced activity and stability of Cu/OLC catalyst can be attributed to the unique catalyst design, wherein a shell of OLC surrounds the Cu NPs such that the outer layer acts as a filter that protects the Cu surface from adsorption of undesirable species, enhances its electrocatalytic performance, and improves its viability in CO2 electroreduction reaction.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1394472
Alternate ID(s):
OSTI ID: 1703692
Journal Information:
Catalysis Today, Journal Name: Catalysis Today Journal Issue: C Vol. 288; ISSN 0920-5861
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (6)

Small and Narrowly Distributed Copper Nanoparticles Supported on Carbon Prepared by Surface Organometallic Chemistry for Selective Hydrogenation and CO 2 Electroconversion Processes journal October 2019
Electrochemically Inspired Copper(II) Complex on Disposable Graphite Pencil Electrode for Effective Simultaneous Detection of Hypoxanthine, Xanthine, and Uric Acid journal July 2018
Template‐Free Cu Electrodeposition to Prepare Cu–Micro‐Brush Electrodes for Electrochemical CO 2 Reduction journal October 2019
Current progress of metallic and carbon-based nanostructure catalysts towards the electrochemical reduction of CO 2 journal January 2019
FeNC catalysts for CO 2 electroreduction to CO: effect of nanostructured carbon supports journal January 2019
Tuning the Products of CO 2 Electroreduction on a Ni 3 Ga Catalyst Using Carbon Solid Supports journal January 2018

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