Improved CO2 reduction activity towards C2+ alcohols on a tandem gold on copper electrocatalyst

Morales-Guio, Carlos G.; Cave, Etosha R.; Nitopi, Stephanie A.; Feaster, Jeremy T.; Wang, Lei; Kuhl, Kendra P.; Jackson, Ariel; Johnson, Natalie C.; Abram, David N.; Hatsukade, Toru; Hahn, Christopher; Jaramillo, Thomas F.

doi:10.1038/s41929-018-0139-9

Improved CO₂ reduction activity towards C₂₊ alcohols on a tandem gold on copper electrocatalyst

Journal Article · Thu Oct 11 00:00:00 EDT 2018 · Nature Catalysis

DOI:https://doi.org/10.1038/s41929-018-0139-9· OSTI ID:1490634

^[1]; Cave, Etosha R. ^[1]; Nitopi, Stephanie A. ^[1]; Feaster, Jeremy T. ^[1]; Wang, Lei ^[1]; Kuhl, Kendra P. ^[1]; Jackson, Ariel ^[1]; Johnson, Natalie C. ^[1]; Abram, David N. ^[1]; Hatsukade, Toru ^[1]; Hahn, Christopher ^[2]; ^[2]

Stanford Univ., Stanford, CA (United States)
Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

Here, the discovery of materials for the electrochemical transformation of carbon dioxide into liquid fuels has the potential to impact large-scale storage of renewable energies and reduce carbon emissions. Here, we report the discovery of an electrocatalyst composed of gold nanoparticles on a polycrystalline copper foil (Au/Cu) that is highly active for CO₂ reduction to alcohols. At low overpotentials, the Au/Cu electrocatalyst is over 100 times more selective for the formation of products containing C–C bonds versus methane or methanol, largely favouring the generation of alcohols over hydrocarbons. A combination of electrochemical testing and transport modelling supports the hypothesis that CO₂ reduction on gold generates a high CO concentration on nearby copper, where CO is further reduced to alcohols such as ethanol and n-propanol under locally alkaline conditions. The bimetallic Au/Cu electrocatalyst exhibits synergistic activity and selectivity superior to gold, copper or AuCu alloys, and opens new possibilities for the development of CO₂ reduction electrodes exploiting tandem catalysis mechanisms.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1490634

Journal Information:: Nature Catalysis, Journal Name: Nature Catalysis Journal Issue: 10 Vol. 1; ISSN 2520-1158

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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