Among all CO2 reduction reaction (CO2RR) active metals, copper is the only one that exhibits optimal *CO binding energy for multiple electron transfers. Despite such a unique feature, the use of Cu-based CO2RR catalysts at the industrial scale is hampered by large overpotentials and poor selectivity. In this realm, the introduction of acidic/basic functionalities at the catalyst surface may help to both overcome scaling relations (i.e., lower CO2RR overpotential) and tune the selectivity of Cu-based catalysts. Herein, we demonstrate that an amphoteric calcium phosphate additive (hydroxyapatite, HAP, Ca10(PO4)6(OH)2) alters the product distribution from Cu-based catalysts by steering CO2RR selectivity toward liquid oxygenated products, promoting formate production over CO.

Steering Cu-Based CO2RR Electrocatalysts’ Selectivity: Effect of Hydroxyapatite Acid/Base Moieties in Promoting Formate Production / M. Ferri, L. Delafontaine, S. Guo, T. Asset, P. Cristiani, S. Campisi, A. Gervasini, P. Atanassov. - In: ACS ENERGY LETTERS. - ISSN 2380-8195. - 30(2022), pp. 7.2304-7.2310. [Epub ahead of print] [10.1021/acsenergylett.2c01144]

Steering Cu-Based CO2RR Electrocatalysts’ Selectivity: Effect of Hydroxyapatite Acid/Base Moieties in Promoting Formate Production

M. Ferri
Primo
;
S. Campisi;A. Gervasini
Penultimo
;
2022

Abstract

Among all CO2 reduction reaction (CO2RR) active metals, copper is the only one that exhibits optimal *CO binding energy for multiple electron transfers. Despite such a unique feature, the use of Cu-based CO2RR catalysts at the industrial scale is hampered by large overpotentials and poor selectivity. In this realm, the introduction of acidic/basic functionalities at the catalyst surface may help to both overcome scaling relations (i.e., lower CO2RR overpotential) and tune the selectivity of Cu-based catalysts. Herein, we demonstrate that an amphoteric calcium phosphate additive (hydroxyapatite, HAP, Ca10(PO4)6(OH)2) alters the product distribution from Cu-based catalysts by steering CO2RR selectivity toward liquid oxygenated products, promoting formate production over CO.
Settore CHIM/02 - Chimica Fisica
Settore CHIM/03 - Chimica Generale e Inorganica
Settore CHIM/04 - Chimica Industriale
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/931027
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