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Paramelaconite‐Enriched Copper‐Based Material as an Efficient and Robust Catalyst for Electrochemical Carbon Dioxide Reduction
Author(s) -
Martić Nemanja,
Reller Christian,
Macauley Chandra,
Löffler Mario,
Schmid Bernhard,
Reinisch David,
Volkova Elena,
Maltenberger Anna,
Rucki Andreas,
Mayrhofer Karl J. J.,
Schmid Günter
Publication year - 2019
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201901228
Subject(s) - materials science , copper , catalysis , faraday efficiency , electrochemistry , electrocatalyst , oxide , electrochemical reduction of carbon dioxide , x ray photoelectron spectroscopy , copper oxide , reversible hydrogen electrode , inorganic chemistry , electrode , chemical engineering , carbon monoxide , reference electrode , chemistry , metallurgy , organic chemistry , engineering
A copper‐oxide‐based catalyst enriched with paramelaconite (Cu 4 O 3 ) is presented and investigated as an electrocatalyst for facilitating electroreduction of CO 2 to ethylene and other hydrocarbons. Cu 4 O 3 is a member of the copper‐oxide family and possesses an intriguing mixed‐valance nature, incorporating an equal number of Cu + and Cu 2+ ions in its crystal structure. The material is synthesized using a solvothermal synthesis route and its structure is confirmed via powder X‐ray diffraction, transmission electron microscope based selected area electron diffraction, and X‐ray photoelectron spectroscopy. A flow reactor equipped with a gas diffusion electrode is utilized to test a copper‐based catalyst enriched with the Cu 4 O 3 phase under CO 2 reduction conditions. The Cu 4 O 3 ‐rich catalyst (PrC) shows a Faradaic efficiency for ethylene over 40% at 400 mA cm −2 . At −0.64 versus reversible hydrogen electrode, the highest C 2+ /C 1 product ratio of 4.8 is achieved, with C 2+ Faradaic efficiency over 61%. Additionally, the catalyst exhibits a stable performance for 24 h at a constant current density of 200 mA cm −2 .