Covalent Organic Frameworks Boost the Silver-Electrocatalyzed Reduction of CO2: The Electronic and Confinement Effect

Xian Xia Yang; Yi Ran Du; Xiao Qiang Li; Guo Yi Duan; Yong Mei Chen; Bao Hua Xu

doi:10.1021/acsami.3c05679

Covalent Organic Frameworks Boost the Silver-Electrocatalyzed Reduction of CO₂: The Electronic and Confinement Effect

Xian Xia Yang, Yi Ran Du, Xiao Qiang Li, Guo Yi Duan, Yong Mei Chen^*, Bao Hua Xu^*

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

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

5 Citations (Scopus)

Abstract

The electrocatalytic reduction of CO₂ to CO with high efficiency is one of the most promising approaches for CO₂ conversion due to its considerable economic feasibility and broad application prospects. In this study, three Ag@COF-R (R = −H, −OCH₃, −OH) hybrids were facilely fabricated by impregnating silver acetate (AgOAc) into respective covalent organic frameworks (COFs) prepared in advance. They differ significantly in the crystallinity, porosity, distribution, size, and electronic configuration of AgOAc species, which thereby influences both the activity and the selectivity of electrolytic CO₂-to-CO transformation. Impressively, Ag@COF-OCH₃ provided a high FE_CO of 93.0% with a high j_CO of 213.9 mA cm^-2 at −0.87 V (vs reversible hydrogen electrode, RHE) in 1 M KOH using a flow cell. In addition, it exhibited long-term durability at 100 mA cm^-2 for 30 h.

Original language	English
Pages (from-to)	31533-31542
Number of pages	10
Journal	ACS applied materials & interfaces
Volume	15
Issue number	26
DOIs	https://doi.org/10.1021/acsami.3c05679
Publication status	Published - 5 Jul 2023

Keywords

CO-to-CO conversion
covalent organic frameworks
electrocatalyst
electronic effect
silver species

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10.1021/acsami.3c05679

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title = "Covalent Organic Frameworks Boost the Silver-Electrocatalyzed Reduction of CO2: The Electronic and Confinement Effect",

abstract = "The electrocatalytic reduction of CO2 to CO with high efficiency is one of the most promising approaches for CO2 conversion due to its considerable economic feasibility and broad application prospects. In this study, three Ag@COF-R (R = −H, −OCH3, −OH) hybrids were facilely fabricated by impregnating silver acetate (AgOAc) into respective covalent organic frameworks (COFs) prepared in advance. They differ significantly in the crystallinity, porosity, distribution, size, and electronic configuration of AgOAc species, which thereby influences both the activity and the selectivity of electrolytic CO2-to-CO transformation. Impressively, Ag@COF-OCH3 provided a high FECO of 93.0% with a high jCO of 213.9 mA cm-2 at −0.87 V (vs reversible hydrogen electrode, RHE) in 1 M KOH using a flow cell. In addition, it exhibited long-term durability at 100 mA cm-2 for 30 h.",

keywords = "CO-to-CO conversion, covalent organic frameworks, electrocatalyst, electronic effect, silver species",

author = "Yang, {Xian Xia} and Du, {Yi Ran} and Li, {Xiao Qiang} and Duan, {Guo Yi} and Chen, {Yong Mei} and Xu, {Bao Hua}",

note = "Publisher Copyright: {\textcopyright} 2023 American Chemical Society.",

year = "2023",

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doi = "10.1021/acsami.3c05679",

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T1 - Covalent Organic Frameworks Boost the Silver-Electrocatalyzed Reduction of CO2

T2 - The Electronic and Confinement Effect

AU - Yang, Xian Xia

AU - Du, Yi Ran

AU - Li, Xiao Qiang

AU - Duan, Guo Yi

AU - Chen, Yong Mei

AU - Xu, Bao Hua

PY - 2023/7/5

Y1 - 2023/7/5

N2 - The electrocatalytic reduction of CO2 to CO with high efficiency is one of the most promising approaches for CO2 conversion due to its considerable economic feasibility and broad application prospects. In this study, three Ag@COF-R (R = −H, −OCH3, −OH) hybrids were facilely fabricated by impregnating silver acetate (AgOAc) into respective covalent organic frameworks (COFs) prepared in advance. They differ significantly in the crystallinity, porosity, distribution, size, and electronic configuration of AgOAc species, which thereby influences both the activity and the selectivity of electrolytic CO2-to-CO transformation. Impressively, Ag@COF-OCH3 provided a high FECO of 93.0% with a high jCO of 213.9 mA cm-2 at −0.87 V (vs reversible hydrogen electrode, RHE) in 1 M KOH using a flow cell. In addition, it exhibited long-term durability at 100 mA cm-2 for 30 h.

AB - The electrocatalytic reduction of CO2 to CO with high efficiency is one of the most promising approaches for CO2 conversion due to its considerable economic feasibility and broad application prospects. In this study, three Ag@COF-R (R = −H, −OCH3, −OH) hybrids were facilely fabricated by impregnating silver acetate (AgOAc) into respective covalent organic frameworks (COFs) prepared in advance. They differ significantly in the crystallinity, porosity, distribution, size, and electronic configuration of AgOAc species, which thereby influences both the activity and the selectivity of electrolytic CO2-to-CO transformation. Impressively, Ag@COF-OCH3 provided a high FECO of 93.0% with a high jCO of 213.9 mA cm-2 at −0.87 V (vs reversible hydrogen electrode, RHE) in 1 M KOH using a flow cell. In addition, it exhibited long-term durability at 100 mA cm-2 for 30 h.

KW - CO-to-CO conversion

KW - covalent organic frameworks

KW - electrocatalyst

KW - electronic effect

KW - silver species

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SN - 1944-8244

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IS - 26

ER -

Covalent Organic Frameworks Boost the Silver-Electrocatalyzed Reduction of CO₂: The Electronic and Confinement Effect

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Keywords

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