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A robust and high performance copper silicide catalyst for electrochemical CO2 reduction
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SYSNO ASEP 0582978 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title A robust and high performance copper silicide catalyst for electrochemical CO2 reduction Author(s) Dřínek, Vladislav (UCHP-M) RID, ORCID, SAI
Dytrych, Pavel (UCHP-M) RID, ORCID, SAI
Fajgar, Radek (UCHP-M) RID, ORCID, SAI
Klementová, Mariana (FZU-D) RID, ORCID
Kupčík, Jaroslav (UCHP-M) RID, ORCID, SAI
Kopeček, Jaromír (FZU-D) RID, ORCID
Svora, Petr (FZU-D) ORCID
Koštejn, Martin (UCHP-M) RID, SAI, ORCID
Jandová, Věra (UCHP-M) RID, ORCID, SAI
Soukup, Karel (UCHP-M) RID, SAI, ORCID
Beránek, R. (DE)Source Title Materials Advances. - : Royal Society of Chemistry
Roč. 5, č. 7 (2024), s. 2917-2925Number of pages 9 s. Language eng - English Country GB - United Kingdom Keywords Cu-Si ; phase selectivity ; Cu3S1 OECD category Nano-processes (applications on nano-scale) R&D Projects LM2023051 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UCHP-M - RVO:67985858 ; FZU-D - RVO:68378271 UT WOS 001174886900001 EID SCOPUS 85186065672 DOI 10.1039/D3MA00633F Annotation A copper-based catalyst CuxSi (3<x<5) was prepared using chemical vapor deposition (CVD) of butylsilane (BuSiH3) on copper substrates. By varying the precursor flow, we obtained two catalyst variants, one with and one without a SiCx shell. Both variants exhibited large specific areas, owing to the presence of grown nanostructures such as nanoplatelets, nan-owires, nanoribbons, and microwires. Remarkably, the catalytic performance of both variants remained stable even after 720 hours of continuous operation. The porous and thick catalyst layer (over a hundred micrometers) on the substrate significantly increased the residence time of intermediates during the electrochemical CO2 reduction reactions (eCO2RR). We observed a high selectivity towards ethanol (~79%) in neutral CO2-saturated electrolytes and a high selectivity towards acetic acid (~72%) in alkaline electrolytes. Importantly, the ratio between generated ethanol and acetate could be shifted by adjusting the pH and applied potential. This work thus establishes copper silicides as robust and promising electrocatalysts for selective CO2 conversion to high-value multi-carbon products. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2025 Electronic address https://pubs.rsc.org/en/content/articlepdf/2024/ma/d3ma00633f
Number of the records: 1