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A robust and high performance copper silicide catalyst for electrochemical CO2 reduction
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SYSNO ASEP 0582978 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název A robust and high performance copper silicide catalyst for electrochemical CO2 reduction Tvůrce(i) 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)Zdroj.dok. Materials Advances. - : Royal Society of Chemistry
Roč. 5, č. 7 (2024), s. 2917-2925Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Cu-Si ; phase selectivity ; Cu3S1 Obor OECD Nano-processes (applications on nano-scale) CEP LM2023051 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UCHP-M - RVO:67985858 ; FZU-D - RVO:68378271 UT WOS 001174886900001 EID SCOPUS 85186065672 DOI https://doi.org/10.1039/D3MA00633F Anotace 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. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2025 Elektronická adresa https://pubs.rsc.org/en/content/articlepdf/2024/ma/d3ma00633f
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