Poly(ionic liquid) boosts overall performance of electrocatalytic reduction of low concentration of CO gas

Guo Yi Duan; Xiao Qiang Li; Jun Wu Chen; Guang Rong Ding; Peng Xin Guan; Bao Hua Xu

doi:10.1016/j.cej.2022.138491

Poly(ionic liquid) boosts overall performance of electrocatalytic reduction of low concentration of CO gas

Guo Yi Duan, Xiao Qiang Li, Jun Wu Chen, Guang Rong Ding, Peng Xin Guan, Bao Hua Xu^*

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

Electrocatalytic reduction of CO (CORR) provides a feasible way for not only CO₂ conversion via tandem CO₂-to-CO-to-C₂₊ process but also CO utilization from industrial exhaust gases. In this work, poly(ionic liquid) modified Cu catalyst (Cu@PIL) was employed as the electrocatalyst to convert low concentration CO gas to high-value C₂₊ products. An over 90 % faradaic efficiency of C₂₊ products (FE_C2+) was obtained at a constant current density of 125.0 mA cm⁻² within a broad range of feedstock concentrations from 100.0 to 40.0 vol%. Remarkably, excellent comprehensive performance was achieved with feeding CO gas as less as 5.0 vol%, delivering a high FE_C2+ of 71.1 % with high CO conversion (67.4 %) and high energetic efficiency (29.1 %). Mechanistic studies suggest the local enrichment of CO via adsorption and accelerated mass transfer by porous PIL layer as well as the suppression of hydrogen evolution reaction enables the CO-to-C₂₊ transformation with diluted CO gas.

Original language	English
Article number	138491
Journal	Chemical Engineering Journal
Volume	451
DOIs	https://doi.org/10.1016/j.cej.2022.138491
Publication status	Published - 1 Jan 2022
Externally published	Yes

Keywords

C-C coupling
CO electroreduction
Electrochemistry
Ploy(ionic liquids)-metal hybrids
low concentration of CO gas

Access to Document

10.1016/j.cej.2022.138491

Cite this

@article{f330b2a88c6848318158817ecbb0e658,

title = "Poly(ionic liquid) boosts overall performance of electrocatalytic reduction of low concentration of CO gas",

abstract = "Electrocatalytic reduction of CO (CORR) provides a feasible way for not only CO2 conversion via tandem CO2-to-CO-to-C2+ process but also CO utilization from industrial exhaust gases. In this work, poly(ionic liquid) modified Cu catalyst (Cu@PIL) was employed as the electrocatalyst to convert low concentration CO gas to high-value C2+ products. An over 90 % faradaic efficiency of C2+ products (FEC2+) was obtained at a constant current density of 125.0 mA cm−2 within a broad range of feedstock concentrations from 100.0 to 40.0 vol%. Remarkably, excellent comprehensive performance was achieved with feeding CO gas as less as 5.0 vol%, delivering a high FEC2+ of 71.1 % with high CO conversion (67.4 %) and high energetic efficiency (29.1 %). Mechanistic studies suggest the local enrichment of CO via adsorption and accelerated mass transfer by porous PIL layer as well as the suppression of hydrogen evolution reaction enables the CO-to-C2+ transformation with diluted CO gas.",

keywords = "C-C coupling, CO electroreduction, Electrochemistry, Ploy(ionic liquids)-metal hybrids, low concentration of CO gas",

author = "Duan, {Guo Yi} and Li, {Xiao Qiang} and Chen, {Jun Wu} and Ding, {Guang Rong} and Guan, {Peng Xin} and Xu, {Bao Hua}",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = jan,

day = "1",

doi = "10.1016/j.cej.2022.138491",

language = "English",

volume = "451",

journal = "Chemical Engineering Journal",

issn = "1385-8947",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Poly(ionic liquid) boosts overall performance of electrocatalytic reduction of low concentration of CO gas

AU - Duan, Guo Yi

AU - Li, Xiao Qiang

AU - Chen, Jun Wu

AU - Ding, Guang Rong

AU - Guan, Peng Xin

AU - Xu, Bao Hua

PY - 2022/1/1

Y1 - 2022/1/1

N2 - Electrocatalytic reduction of CO (CORR) provides a feasible way for not only CO2 conversion via tandem CO2-to-CO-to-C2+ process but also CO utilization from industrial exhaust gases. In this work, poly(ionic liquid) modified Cu catalyst (Cu@PIL) was employed as the electrocatalyst to convert low concentration CO gas to high-value C2+ products. An over 90 % faradaic efficiency of C2+ products (FEC2+) was obtained at a constant current density of 125.0 mA cm−2 within a broad range of feedstock concentrations from 100.0 to 40.0 vol%. Remarkably, excellent comprehensive performance was achieved with feeding CO gas as less as 5.0 vol%, delivering a high FEC2+ of 71.1 % with high CO conversion (67.4 %) and high energetic efficiency (29.1 %). Mechanistic studies suggest the local enrichment of CO via adsorption and accelerated mass transfer by porous PIL layer as well as the suppression of hydrogen evolution reaction enables the CO-to-C2+ transformation with diluted CO gas.

AB - Electrocatalytic reduction of CO (CORR) provides a feasible way for not only CO2 conversion via tandem CO2-to-CO-to-C2+ process but also CO utilization from industrial exhaust gases. In this work, poly(ionic liquid) modified Cu catalyst (Cu@PIL) was employed as the electrocatalyst to convert low concentration CO gas to high-value C2+ products. An over 90 % faradaic efficiency of C2+ products (FEC2+) was obtained at a constant current density of 125.0 mA cm−2 within a broad range of feedstock concentrations from 100.0 to 40.0 vol%. Remarkably, excellent comprehensive performance was achieved with feeding CO gas as less as 5.0 vol%, delivering a high FEC2+ of 71.1 % with high CO conversion (67.4 %) and high energetic efficiency (29.1 %). Mechanistic studies suggest the local enrichment of CO via adsorption and accelerated mass transfer by porous PIL layer as well as the suppression of hydrogen evolution reaction enables the CO-to-C2+ transformation with diluted CO gas.

KW - C-C coupling

KW - CO electroreduction

KW - Electrochemistry

KW - Ploy(ionic liquids)-metal hybrids

KW - low concentration of CO gas

UR - http://www.scopus.com/inward/record.url?scp=85135824763&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2022.138491

DO - 10.1016/j.cej.2022.138491

M3 - Article

AN - SCOPUS:85135824763

SN - 1385-8947

VL - 451

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

M1 - 138491

ER -

Poly(ionic liquid) boosts overall performance of electrocatalytic reduction of low concentration of CO gas

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this