Liquid-Phase Exfoliated GeSe Nanoflakes for Photoelectrochemical-Type Photodetectors and Photoelectrochemical Water Splitting

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Search: onr:"swepub:oai:DiVA.org:uu-429050" > Liquid-Phase Exfoli...

1 of 1
Previous record
Next record
To hitlist

Liquid-Phase Exfoliated GeSe Nanoflakes for Photoelectrochemical-Type Photodetectors and Photoelectrochemical Water Splitting

Bianca, Gabriele (author): Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.;Univ Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy.

Zappia, Marilena I. (author): BeDimens Soc Azioni, I-16163 Genoa, Italy.;Univ Calabria, Dept Phys, I-87036 Cosenza, Italy.

Bellani, Sebastiano (author): BeDimens Soc Azioni, I-16163 Genoa, Italy.

Sofer, Zdene. K. (author): Univ Chem & Technol Prague, Dept Inorgan Chem, Prague 16628 6, Czech Republic.

Serri, Michele (author): Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.

Najafi, Leyla (author): BeDimens Soc Azioni, I-16163 Genoa, Italy.

Oropesa-Nunez, Reinier (author): Uppsala universitet,Institutionen för materialvetenskap,BeDimens Soc Azioni, I-16163 Genoa, Italy

Martin-Garcia, Beatriz (author): Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.;CIC NanoGUNE, Donostia San Sebastian 20018, Spain.

Hartman, Tomas (author): Univ Chem & Technol Prague, Dept Inorgan Chem, Prague 16628 6, Czech Republic.

Leoncino, Luca (author): Ist Italiano Tecnol, Electron Microscopy Facil, I-16163 Genoa, Italy.

Sedmidubsky, David (author): Univ Chem & Technol Prague, Dept Inorgan Chem, Prague 16628 6, Czech Republic.

Pellegrini, Vittorio (author): BeDimens Soc Azioni, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.

Chiarello, Gennaro (author): Univ Calabria, Dept Phys, I-87036 Cosenza, Italy.

Bonaccorso, Francesco (author): BeDimens Soc Azioni, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.

show less...

Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy;Univ Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy. BeDimens Soc Azioni, I-16163 Genoa, Italy.;Univ Calabria, Dept Phys, I-87036 Cosenza, Italy. (creator_code:org_t)

2020-09-22
2020
English.
In: ACS Applied Materials and Interfaces. - : AMER CHEMICAL SOC. - 1944-8244 .- 1944-8252. ; 12:43, s. 48598-48613

Related links:: https://pubs.acs.org...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Photoelectrochemical (PEC) systems represent powerful tools to convert electromagnetic radiation into chemical fuels and electricity. In this context, two-dimensional (2D) materials are attracting enormous interest as potential advanced photo(electro)catalysts and, recently, 2D group-IVA metal monochalcogenides have been theoretically predicted to be water splitting photocatalysts. In this work, we use density functional theory calculations to theoretically investigate the photocatalytic activity of single-/few-layer GeSe nanoflakes for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) in pH conditions ranging from 0 to 14. Our simulations show that GeSe nanoflakes with different thickness can be mixed in the form of nanoporous films to act as nanoscale tandem systems, in which the flakes, depending on their thickness, can operate as HER- and/or OER photocatalysts. On the basis of theoretical predictions, we report the first experimental characterization of the photo(electro)catalytic activity of single-/few-layer GeSe flakes in different aqueous media, ranging from acidic to alkaline solutions: 0.5 M H2SO4 (pH 0.3), 1 M KCl (pH 6.5), and 1 M KOH (pH 14). The films of the GeSe nanoflakes are fabricated by spray coating GeSe nanoflakes dispersion in 2-propanol obtained through liquid-phase exfoliation of synthesized orthorhombic (Pnma) GeSe bulk crystals. The PEC properties of the GeSe nanoflakes are used to design PEC-type photodetectors, reaching a responsivity of up to 0.32 AW(-1) (external quantum efficiency of 86.3%) under 455 nm excitation wavelength in acidic electrolyte. The obtained performances are superior to those of several self-powered and low-voltage solution-processed photodetectors, approaching that of self-powered commercial UV-Vis photodetectors. The obtained results inspire the use of 2D GeSe in proof-of-concept water photoelectrolysis cells.

Subject headings

NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)

Keyword

germanium selenide (GeSe)
photocatalysts
water splitting
two-dimensional materials
hydrogen evolution reaction (HER)
oxygen evolution reaction (OER)

Publication and Content Type

ref (subject category)
art (subject category)

Find in a library

ACS Applied Materials and Interfaces (Search for host publication in LIBRIS)

To the university's database

1 of 1
Previous record
Next record
To hitlist

Find more in SwePub

By the author/editor: Bianca, Gabriele; Zappia, Marilena ...; Bellani, Sebasti ...; Sofer, Zdene. K.; Serri, Michele; Najafi, Leyla; show more...; Oropesa-Nunez, R ...; Martin-Garcia, B ...; Hartman, Tomas; Leoncino, Luca; Sedmidubsky, Dav ...; Pellegrini, Vitt ...; Chiarello, Genna ...; Bonaccorso, Fran ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Physical Chemist ...

Articles in the publication: ACS Applied Mate ...

By the university: Uppsala University

Search outside SwePub

Extend your search to:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se