Self-assembly of a Ni(I)-photocatalyst for plain water splitting without sacrificial agents

Kód výsledku v IS VaVaI

RIV/61989592:15640/21:73607101 - isvavai.cz

Výsledek na webu

https://reader.elsevier.com/reader/sd/pii/S1388248120302605?token=BAC714545D435EFE41FAF53F527DA64D26D5481FACCA7BC0555D6F2E682BCC94EAACC9B5059A4396FD234A008C8A20FB&originRegion=eu-west-1&originCreation=20210713064259

DOI - Digital Object Identifier

10.1016/j.elecom.2020.106909

Jazyk výsledku

angličtina

Název v původním jazyce

Self-assembly of a Ni(I)-photocatalyst for plain water splitting without sacrificial agents

Popis výsledku v původním jazyce

The present work describes a self-assembling photocatalytic system that is observed when illuminating grey titania nanoparticles in suspension with a plain aqueous Ni2+ solution. Such a suspension (in contrast to white titania), under UV illumination, increasingly produces H-2 from neutral water. We show that the origin of this self-activation is not the light-induced deposition of Ni-0 or another Ni-catalyst compound on the titania surface. Rather, in-situ electron paramagnetic resonance (EPR) clearly indicates that the activation is due to a light-induced formation of a suitable defect structure (Ti3+-O-v) on grey titania, combined with the formation of an intermediate monovalent nickel (Ni(I)) electron transfer relay. Remarkably, the resulting Ni+/TiO2/Ti3+ photocatalyst operates in absence of any noble metal or sacrificial agent.

Název v anglickém jazyce

Self-assembly of a Ni(I)-photocatalyst for plain water splitting without sacrificial agents

Popis výsledku anglicky

The present work describes a self-assembling photocatalytic system that is observed when illuminating grey titania nanoparticles in suspension with a plain aqueous Ni2+ solution. Such a suspension (in contrast to white titania), under UV illumination, increasingly produces H-2 from neutral water. We show that the origin of this self-activation is not the light-induced deposition of Ni-0 or another Ni-catalyst compound on the titania surface. Rather, in-situ electron paramagnetic resonance (EPR) clearly indicates that the activation is due to a light-induced formation of a suitable defect structure (Ti3+-O-v) on grey titania, combined with the formation of an intermediate monovalent nickel (Ni(I)) electron transfer relay. Remarkably, the resulting Ni+/TiO2/Ti3+ photocatalyst operates in absence of any noble metal or sacrificial agent.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

EF15_003/0000416: Pokročilé hybridní nanostruktury pro aplikaci v obnovitelných zdrojích energie

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

ELECTROCHEMISTRY COMMUNICATIONS

ISSN

1388-2481

e-ISSN

—

Svazek periodika

122 (2021)

Číslo periodika v rámci svazku

106909

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

1-5

Kód UT WoS článku

000620267700004

EID výsledku v databázi Scopus

2-s2.0-85098706886