Two-step synthesis and characterization of CuFeO2 thin layers for photoelectrocatalytic applications

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43931727" target="_blank" >RIV/60461373:22310/25:43931727 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0013468625008771?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0013468625008771?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2025.146516" target="_blank" >10.1016/j.electacta.2025.146516</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Two-step synthesis and characterization of CuFeO2 thin layers for photoelectrocatalytic applications

Popis výsledku v původním jazyce

Delafossite, particularly CuFeO2, is an oxide material characterized by its unique crystal structure and favorable electronic properties, increasing its importance as a photocathode for hydrogen production. Its ability to efficiently absorb solar light and facilitate charge separation is crucial for photocatalytic reactions. With a suitable bandgap and stability under operational conditions, CuFeO2 can drive the photoelectrolysis of water, converting sunlight into chemical energy in the form of hydrogen. These properties position CuFeO2 as a promising candidate for renewable energy applications, contributing to sustainable hydrogen production. This study investigates the utilization of the spray pyrolysis method to deposit thin films of mixed iron and copper oxides from aqueous solutions of nitrates onto fused silica or conductive FTO glass (F-doped tin oxide on borosilicate glass) substrates. Following deposition, thermal treatment was conducted to achieve the delafossite phase, CuFeO2. The annealing process was optimized to produce phase pure crystalline CuFeO2 on a conductive substrate. We report the successful preparation of CuFeO2 on FTO through vacuum annealing at 700 °C. To compare the influence of used conditions on CuFeO2 photocathodes performance, the photoelectrochemical properties of the resulting films were evaluated using linear voltammetry, amperometry, and electrochemical impedance spectroscopy in O2-saturated electrolyte solutions. The resulting layers exhibited photocurrents of around −0.2 mA/cm2 at −0.35 V vs. Ag/AgCl. © 2025 Elsevier Ltd

Název v anglickém jazyce

Two-step synthesis and characterization of CuFeO2 thin layers for photoelectrocatalytic applications

Popis výsledku anglicky

Delafossite, particularly CuFeO2, is an oxide material characterized by its unique crystal structure and favorable electronic properties, increasing its importance as a photocathode for hydrogen production. Its ability to efficiently absorb solar light and facilitate charge separation is crucial for photocatalytic reactions. With a suitable bandgap and stability under operational conditions, CuFeO2 can drive the photoelectrolysis of water, converting sunlight into chemical energy in the form of hydrogen. These properties position CuFeO2 as a promising candidate for renewable energy applications, contributing to sustainable hydrogen production. This study investigates the utilization of the spray pyrolysis method to deposit thin films of mixed iron and copper oxides from aqueous solutions of nitrates onto fused silica or conductive FTO glass (F-doped tin oxide on borosilicate glass) substrates. Following deposition, thermal treatment was conducted to achieve the delafossite phase, CuFeO2. The annealing process was optimized to produce phase pure crystalline CuFeO2 on a conductive substrate. We report the successful preparation of CuFeO2 on FTO through vacuum annealing at 700 °C. To compare the influence of used conditions on CuFeO2 photocathodes performance, the photoelectrochemical properties of the resulting films were evaluated using linear voltammetry, amperometry, and electrochemical impedance spectroscopy in O2-saturated electrolyte solutions. The resulting layers exhibited photocurrents of around −0.2 mA/cm2 at −0.35 V vs. Ag/AgCl. © 2025 Elsevier Ltd

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/GA23-05266S" target="_blank" >GA23-05266S: Studie klíčových faktorů ovlivňujících účinnost fotoelektrochemických cel využívající sluneční světlo pro syntézní reakce a čištění vod</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ELECTROCHIMICA ACTA

ISSN

0013-4686

e-ISSN

1873-3859

Svazek periodika

535

Číslo periodika v rámci svazku

neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

nestránkováno

Kód UT WoS článku

001656981000001

EID výsledku v databázi Scopus

2-s2.0-105007436839