Selective electroreduction of CO2 into CO over Ag and Cu decorated carbon nanoflakes

Faraz, A; Iqbal, W; Gul, S; Kanodarwala, FK; Zafar, MN; Xu, G; Nadeem, MA

Selective electroreduction of CO2 into CO over Ag and Cu decorated carbon nanoflakes

Faraz, A Iqbal, W Gul, S Kanodarwala, FK Zafar, MN Xu, G Nadeem, MA

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Publisher:: ROYAL SOC CHEMISTRY
Publication Type:: Journal Article
Citation:: Energy Advances, 2024, 3, (9), pp. 2367-2376
Issue Date:: 2024-08-06

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Field	Value	Language
dc.contributor.author	Faraz, A
dc.contributor.author	Iqbal, W
dc.contributor.author	Gul, S
dc.contributor.author	Kanodarwala, FK
dc.contributor.author	Zafar, MN
dc.contributor.author	Xu, G
dc.contributor.author	Nadeem, MA
dc.date.accessioned	2025-06-30T04:00:00Z
dc.date.available	2025-06-30T04:00:00Z
dc.date.issued	2024-08-06
dc.identifier.citation	Energy Advances, 2024, 3, (9), pp. 2367-2376
dc.identifier.issn	2753-1457
dc.identifier.issn	2753-1457
dc.identifier.uri	http://hdl.handle.net/10453/187996
dc.description.abstract	The electrocatalytic CO<inf>2</inf> reduction reaction (eCO<inf>2</inf>RR) has the potential to effectively cut carbon emission. However, the activity and selectivity of eCO<inf>2</inf>RR catalysts are topical due to the intricacy of the reaction components and mechanism. Herein, we have decorated silver and copper nanoparticles over carbon nanoflakes to achieve an Ag-Cu NPs/C system that enables selective reduction of CO<inf>2</inf> into CO. The catalyst is prepared by incorporating Ag nanoparticles into a Cu-BTC MOF (HKUST-1) and subsequent carbonization that alters the surface composition, with improved activity and faradaic efficiency (FE) towards selective CO<inf>2</inf> reduction. The evaluation of electrocatalytic performance reveals that the synthesized catalyst exhibits enhanced electrocatalytic activity and selectivity with a FE<inf>CO</inf> of ∼ 90% at −0.79 V<inf>RHE</inf> and a current density (j) of 44.15 mA cm<sup>−2</sup> compared to Ag-NPs and Cu/C. The durability test over 40 h confirms the outstanding stability of Ag-Cu NPs/C. The lower Tafel slope value of only 75 mV dec<sup>−1</sup> corresponds to the fast reaction kinetics on the surface of Ag-Cu NPs/C. The synthetic protocol in this work offers an easy approach to the betterment of a cost-effective electrocatalyst with improved FE.
dc.language	English
dc.publisher	ROYAL SOC CHEMISTRY
dc.relation.ispartof	Energy Advances
dc.relation.isbasedon	10.1039/d4ya00462k
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Selective electroreduction of CO2 into CO over Ag and Cu decorated carbon nanoflakes
dc.type	Journal Article
utslib.citation.volume	3
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 International License (CC BY-NC 3.0). To view a copy of this license, visit https://creativecommons.org/licenses/by-nc/4.0/
dc.date.updated	2025-06-30T03:59:58Z
pubs.issue	9
pubs.publication-status	Published
pubs.volume	3
utslib.citation.issue	9

Abstract:

The electrocatalytic CO2 reduction reaction (eCO2RR) has the potential to effectively cut carbon emission. However, the activity and selectivity of eCO2RR catalysts are topical due to the intricacy of the reaction components and mechanism. Herein, we have decorated silver and copper nanoparticles over carbon nanoflakes to achieve an Ag-Cu NPs/C system that enables selective reduction of CO2 into CO. The catalyst is prepared by incorporating Ag nanoparticles into a Cu-BTC MOF (HKUST-1) and subsequent carbonization that alters the surface composition, with improved activity and faradaic efficiency (FE) towards selective CO2 reduction. The evaluation of electrocatalytic performance reveals that the synthesized catalyst exhibits enhanced electrocatalytic activity and selectivity with a FECO of ∼ 90% at −0.79 VRHE and a current density (j) of 44.15 mA cm⁻² compared to Ag-NPs and Cu/C. The durability test over 40 h confirms the outstanding stability of Ag-Cu NPs/C. The lower Tafel slope value of only 75 mV dec⁻¹ corresponds to the fast reaction kinetics on the surface of Ag-Cu NPs/C. The synthetic protocol in this work offers an easy approach to the betterment of a cost-effective electrocatalyst with improved FE.

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http://hdl.handle.net/10453/187996