Organic photoelectrode engineering: accelerating photocurrent generation via donor-acceptor interactions and surface-assisted synthetic approach

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F21%3APU140983" target="_blank" >RIV/00216305:26620/21:PU140983 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388963:_____/21:00541532 RIV/00216208:11310/21:10442272 RIV/60461373:22310/21:43924025

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlelanding/2021/TA/D0TA11820F#!divAbstract" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2021/TA/D0TA11820F#!divAbstract</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d0ta11820f" target="_blank" >10.1039/d0ta11820f</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Organic photoelectrode engineering: accelerating photocurrent generation via donor-acceptor interactions and surface-assisted synthetic approach

Popis výsledku v původním jazyce

Conventional photoelectrocatalysts composed of precious metals and inorganic elements have limited synthetic design, hence, hampered modularity of their photophysical properties. Here, we demonstrate a scalable, one-pot synthetic approach to grow organic polymer films on the surface of the conventional copper plate under mild conditions. Molecular precursors, containing electron-rich thiophene and electron-deficient triazine-rings, were combined into a donor-acceptor pi-conjugated polymer with a broad visible light adsorption range due to a narrow bandgap of 1.42 eV. The strong charge push-pull effect enabled the fabricated donor-acceptor material to have a marked activity as an electrode in a photoelectrochemical cell, reaching anodic photocurrent density of 6.8 mu A cm(-2) (at 0.6 V vs. Ag/AgCl, pH 7). This value is 3 times higher than that of the model donor-donor thiophene-only-based polymer and twice as high as that of the analogue synthesized in bulk using the heterogenous CuCl catalyst. In addition, the fabricated photoanode showed a 2-fold increase in the photoelectrocatalytic oxygen evolution from water upon simulated sunlight irradiation with the photocurrent density up to 4.8 mA cm(-2) (at 1.0 V vs. Ag/AgCl, pH 14). The proposed engineering strategy opens new pathways toward the fabrication of efficient organic "green" materials for photoelectrocatalytic solar energy conversion.

Název v anglickém jazyce

Organic photoelectrode engineering: accelerating photocurrent generation via donor-acceptor interactions and surface-assisted synthetic approach

Popis výsledku anglicky

Conventional photoelectrocatalysts composed of precious metals and inorganic elements have limited synthetic design, hence, hampered modularity of their photophysical properties. Here, we demonstrate a scalable, one-pot synthetic approach to grow organic polymer films on the surface of the conventional copper plate under mild conditions. Molecular precursors, containing electron-rich thiophene and electron-deficient triazine-rings, were combined into a donor-acceptor pi-conjugated polymer with a broad visible light adsorption range due to a narrow bandgap of 1.42 eV. The strong charge push-pull effect enabled the fabricated donor-acceptor material to have a marked activity as an electrode in a photoelectrochemical cell, reaching anodic photocurrent density of 6.8 mu A cm(-2) (at 0.6 V vs. Ag/AgCl, pH 7). This value is 3 times higher than that of the model donor-donor thiophene-only-based polymer and twice as high as that of the analogue synthesized in bulk using the heterogenous CuCl catalyst. In addition, the fabricated photoanode showed a 2-fold increase in the photoelectrocatalytic oxygen evolution from water upon simulated sunlight irradiation with the photocurrent density up to 4.8 mA cm(-2) (at 1.0 V vs. Ag/AgCl, pH 14). The proposed engineering strategy opens new pathways toward the fabrication of efficient organic "green" materials for photoelectrocatalytic solar energy conversion.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials Chemistry A

ISSN

2050-7488

e-ISSN

2050-7496

Svazek periodika

9

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

7162-7171

Kód UT WoS článku

000632069500051

EID výsledku v databázi Scopus

2-s2.0-85102982200