Highly dispersed, single-site copper catalysts for the electroreduction of CO2 to methane

Teng Zhang; Sumit Verma; Soojeong Kim; Tim T. Fister; Paul J.A. Kenis; Andrew A. Gewirth

doi:10.1016/j.jelechem.2020.113862

Highly dispersed, single-site copper catalysts for the electroreduction of CO₂ to methane

Teng Zhang, Sumit Verma, Soojeong Kim, Tim T. Fister, Paul J.A. Kenis, Andrew A. Gewirth

Research output: Contribution to journal › Article › peer-review

Abstract

Pyrolyzing Cu(II) precursors absorbed on carbon black gave an eletrocatalytic material for the electroreduction of CO₂. Controlled potential electrolysis and GC analysis revealed an unexpected selectivity towards methane even in alkaline media, with a methane Faradaic efficiency as high as 42%, a partial current density of 100 mA/cm² (at −1 V vs. RHE) and a methane/ethylene ratio of 4:1. XPS, EXAFS, and EDX mapping results indicate a single-site Cu(I) center as the catalytically active site. The limited size of the active sites is believed to be crucial for the preferential formation of methane over ethylene.

Original language	English (US)
Article number	113862
Journal	Journal of Electroanalytical Chemistry
Volume	875
DOIs	https://doi.org/10.1016/j.jelechem.2020.113862
State	Published - Oct 15 2020

Keywords

CO electroreduction
Copper
Methane
Single-site catalysts

ASJC Scopus subject areas

Analytical Chemistry
General Chemical Engineering
Electrochemistry

Online availability

10.1016/j.jelechem.2020.113862

Library availability

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Cite this

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title = "Highly dispersed, single-site copper catalysts for the electroreduction of CO2 to methane",

abstract = "Pyrolyzing Cu(II) precursors absorbed on carbon black gave an eletrocatalytic material for the electroreduction of CO2. Controlled potential electrolysis and GC analysis revealed an unexpected selectivity towards methane even in alkaline media, with a methane Faradaic efficiency as high as 42%, a partial current density of 100 mA/cm2 (at −1 V vs. RHE) and a methane/ethylene ratio of 4:1. XPS, EXAFS, and EDX mapping results indicate a single-site Cu(I) center as the catalytically active site. The limited size of the active sites is believed to be crucial for the preferential formation of methane over ethylene.",

keywords = "CO electroreduction, Copper, Methane, Single-site catalysts",

author = "Teng Zhang and Sumit Verma and Soojeong Kim and Fister, {Tim T.} and Kenis, {Paul J.A.} and Gewirth, {Andrew A.}",

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year = "2020",

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doi = "10.1016/j.jelechem.2020.113862",

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T1 - Highly dispersed, single-site copper catalysts for the electroreduction of CO2 to methane

AU - Zhang, Teng

AU - Verma, Sumit

AU - Kim, Soojeong

AU - Fister, Tim T.

AU - Kenis, Paul J.A.

AU - Gewirth, Andrew A.

PY - 2020/10/15

Y1 - 2020/10/15

N2 - Pyrolyzing Cu(II) precursors absorbed on carbon black gave an eletrocatalytic material for the electroreduction of CO2. Controlled potential electrolysis and GC analysis revealed an unexpected selectivity towards methane even in alkaline media, with a methane Faradaic efficiency as high as 42%, a partial current density of 100 mA/cm2 (at −1 V vs. RHE) and a methane/ethylene ratio of 4:1. XPS, EXAFS, and EDX mapping results indicate a single-site Cu(I) center as the catalytically active site. The limited size of the active sites is believed to be crucial for the preferential formation of methane over ethylene.

AB - Pyrolyzing Cu(II) precursors absorbed on carbon black gave an eletrocatalytic material for the electroreduction of CO2. Controlled potential electrolysis and GC analysis revealed an unexpected selectivity towards methane even in alkaline media, with a methane Faradaic efficiency as high as 42%, a partial current density of 100 mA/cm2 (at −1 V vs. RHE) and a methane/ethylene ratio of 4:1. XPS, EXAFS, and EDX mapping results indicate a single-site Cu(I) center as the catalytically active site. The limited size of the active sites is believed to be crucial for the preferential formation of methane over ethylene.

KW - CO electroreduction

KW - Copper

KW - Methane

KW - Single-site catalysts

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