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 for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

17 Citations (Scopus)

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.

Original languageEnglish
JournalJournal of Materials Chemistry A
Volume9
Issue46
Pages (from-to)26298-26310
Number of pages13
ISSN2050-7488
DOIs
Publication statusPublished - Dec 2021

Fingerprint

Dive into the research topics of 'Exploring the influence of atomic level structure, porosity, and stability of bismuth(III) coordination polymers on electrocatalytic CO2 reduction'. Together they form a unique fingerprint.

Cite this