Conductive Cu-Doped TiO2 Nanotubes for Enhanced Photoelectrochemical Methanol Oxidation and Concomitant Hydrogen Generation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F19%3A73597814" target="_blank" >RIV/61989592:15310/19:73597814 - isvavai.cz</a>

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/full/10.1002/celc.201900076" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1002/celc.201900076</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/celc.201900076" target="_blank" >10.1002/celc.201900076</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Conductive Cu-Doped TiO2 Nanotubes for Enhanced Photoelectrochemical Methanol Oxidation and Concomitant Hydrogen Generation

Popis výsledku v původním jazyce

Cu doping in titania is usually detrimental to the material&apos;s photoconductivity, which prevents the use of this combination in photoanodes. In this work, we produce TiO2 nanotube arrays intrinsically doped with copper and establish sufficient conductivity to use them as efficient photoanodes for methanol oxidation in a photoelectrochemical hydrogen generation setting. Firstly, Cu-doped TiO2 nanotubes were produced by anodizing a Ti-Cu binary alloy. By subsequent thermal reduction of the structure in an Ar/H-2 environment, conductive copper-doped TiO2 nanotubes (TiCuTN Ar/H-2) can be achieved with an approximately 10(3) times higher conductivity than the non-reduced material. When these reduced Cu-doped TiO2 nanotubes are used as photoanode, copper species embedded in the TiO2 wall catalyze the methanol oxidation reaction. As a result of the combined effect of conductivity and catalytic effect of Cu, such reduced Cu:TiO2 nanotubes can generate a photo-current of 0.76 mA cm(-2) at 1 V vs. RHE, under AM1.5 (100 mW/Cm-2) irradiation - in a 50:50 MeOH/water solution - this is 33 times higher than for pristine Cu:TiO2 nanotubes.

Název v anglickém jazyce

Conductive Cu-Doped TiO2 Nanotubes for Enhanced Photoelectrochemical Methanol Oxidation and Concomitant Hydrogen Generation

Popis výsledku anglicky

Cu doping in titania is usually detrimental to the material&apos;s photoconductivity, which prevents the use of this combination in photoanodes. In this work, we produce TiO2 nanotube arrays intrinsically doped with copper and establish sufficient conductivity to use them as efficient photoanodes for methanol oxidation in a photoelectrochemical hydrogen generation setting. Firstly, Cu-doped TiO2 nanotubes were produced by anodizing a Ti-Cu binary alloy. By subsequent thermal reduction of the structure in an Ar/H-2 environment, conductive copper-doped TiO2 nanotubes (TiCuTN Ar/H-2) can be achieved with an approximately 10(3) times higher conductivity than the non-reduced material. When these reduced Cu-doped TiO2 nanotubes are used as photoanode, copper species embedded in the TiO2 wall catalyze the methanol oxidation reaction. As a result of the combined effect of conductivity and catalytic effect of Cu, such reduced Cu:TiO2 nanotubes can generate a photo-current of 0.76 mA cm(-2) at 1 V vs. RHE, under AM1.5 (100 mW/Cm-2) irradiation - in a 50:50 MeOH/water solution - this is 33 times higher than for pristine Cu:TiO2 nanotubes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/EF15_003%2F0000416" target="_blank" >EF15_003/0000416: Pokročilé hybridní nanostruktury pro aplikaci v obnovitelných zdrojích energie</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

ChemElectroChem

ISSN

2196-0216

e-ISSN

—

Svazek periodika

6

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

6

Strana od-do

1244-1249

Kód UT WoS článku

000461580800037

EID výsledku v databázi Scopus

2-s2.0-85062226498