Nanoporous AuPt and AuPtAg alloy co-catalysts formed by dewetting-dealloying on an ordered TiO2 nanotube surface lead to significantly enhanced photocatalytic H-2 generation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F18%3A73591412" target="_blank" >RIV/61989592:15310/18:73591412 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlepdf/2018/ta/c8ta04495c" target="_blank" >https://pubs.rsc.org/en/content/articlepdf/2018/ta/c8ta04495c</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c8ta04495c" target="_blank" >10.1039/c8ta04495c</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nanoporous AuPt and AuPtAg alloy co-catalysts formed by dewetting-dealloying on an ordered TiO2 nanotube surface lead to significantly enhanced photocatalytic H-2 generation

Popis výsledku v původním jazyce

Effective co-catalysts are of key importance for photocatalytic H-2 generation from aqueous environments. AuPt (metastable) alloys are an attractive co-catalyst candidate due to the synergistic electronic and chemical interaction of the constituents in the charge transfer and H-2 evolution processes. Here we introduce the fabrication of AuPt alloy nanoparticles with nanoporosity (pore size of 2-5 nm) on spaced TiO2 nanotubes. By dewetting a layered AgAuPt coating, we form AuPtAg alloy nanoparticles. From these alloys, Ag can selectively be dissolved leading to the desired nanoporous AuPt alloy particles with diameters in the range of 10-70 nm deposited as a gradient on the TiO2 nanotubes. A significant enhancement of photocatalytic H-2 generation is obtained compared to that with the same loading of monometallic or nonporous alloys. The nanoporous AuPt particles not only provide a large surface area to volume ratio (and are thus more effective) but also show the intrinsic synergy of a AuPt alloy for H-2 generation.

Název v anglickém jazyce

Nanoporous AuPt and AuPtAg alloy co-catalysts formed by dewetting-dealloying on an ordered TiO2 nanotube surface lead to significantly enhanced photocatalytic H-2 generation

Popis výsledku anglicky

Effective co-catalysts are of key importance for photocatalytic H-2 generation from aqueous environments. AuPt (metastable) alloys are an attractive co-catalyst candidate due to the synergistic electronic and chemical interaction of the constituents in the charge transfer and H-2 evolution processes. Here we introduce the fabrication of AuPt alloy nanoparticles with nanoporosity (pore size of 2-5 nm) on spaced TiO2 nanotubes. By dewetting a layered AgAuPt coating, we form AuPtAg alloy nanoparticles. From these alloys, Ag can selectively be dissolved leading to the desired nanoporous AuPt alloy particles with diameters in the range of 10-70 nm deposited as a gradient on the TiO2 nanotubes. A significant enhancement of photocatalytic H-2 generation is obtained compared to that with the same loading of monometallic or nonporous alloys. The nanoporous AuPt particles not only provide a large surface area to volume ratio (and are thus more effective) but also show the intrinsic synergy of a AuPt alloy for H-2 generation.

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

2018

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

—

Svazek periodika

6

Číslo periodika v rámci svazku

28

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

13599-13606

Kód UT WoS článku

000439283200008

EID výsledku v databázi Scopus

2-s2.0-85050685208