Exploring the influence of atomic level structure, porosity, and stability of bismuth(III) coordination polymers on electrocatalytic CO2 reduction

Sara Frank, Erik Svensson Grape, Espen Drath Bøjesen, Rasmus Larsen, Paolo Lamagni, Jacopo Catalano, A. Ken Inge, Nina Lock*

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Abstract

Bismuth-based coordination polymers (CPs) have recently attracted attention as catalyst precursors for the electrocatalytic CO2 reduction reaction (eCO2RR). We present a comparative study by investigating six bismuth-based compounds in-depth to elucidate the correlation between their structures and their catalytic CO2-to-formate conversion. Thereby, we identify structural indicators of the pristine CPs resulting in optimized catalytic performance, paving the way for future design of CP derived catalysts. The structural properties of the six pristine materials vary in terms of porosity (from non-porous to 495 m2 g-1), linker type (carboxylate-or phenolate-based), thermal- A nd chemical stability, and metal content. Herein, electrochemical studies are combined with comprehensive structural investigations using electron microscopy, powder X-ray diffraction, and X-ray absorption spectroscopy. Our study reveals that low chemical stability of the pristine CPs is crucial for the conversion of the precursors into active Bi2O2CO3 and of paramount importance for the eCO2RR activity, while the nature of the pristine material mostly influence the catalyst morphology and transport properties. Of the six investigated CPs, the best performing compounds selectively convert CO2 to formate with faradaic efficiencies in the range 80(3)-95(3)% and current densities of 5(1)-8(1) mA cm-2 at-0.97 VRHE.

OriginalsprogEngelsk
TidsskriftJournal of Materials Chemistry A
Vol/bind9
Nummer46
Sider (fra-til)26298-26310
Antal sider13
ISSN2050-7488
DOI
StatusUdgivet - dec. 2021

Fingeraftryk

Dyk ned i forskningsemnerne om 'Exploring the influence of atomic level structure, porosity, and stability of bismuth(III) coordination polymers on electrocatalytic CO2 reduction'. Sammen danner de et unikt fingeraftryk.

Citationsformater