A robust and high performance copper silicide catalyst for electrochemical CO2 reduction

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F24%3A00582978" target="_blank" >RIV/67985858:_____/24:00582978 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/24:00582978
Result on the web
<a href="https://pubs.rsc.org/en/content/articlepdf/2024/ma/d3ma00633f" target="_blank" >https://pubs.rsc.org/en/content/articlepdf/2024/ma/d3ma00633f</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/D3MA00633F" target="_blank" >10.1039/D3MA00633F</a>

Result language
angličtina
Original language name
A robust and high performance copper silicide catalyst for electrochemical CO2 reduction
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)

Project
<a href="/en/project/LM2023051" target="_blank" >LM2023051: Research infrastructure CzechNanoLab</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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