Semiconductor-Metal Hybrid Nanoparticle-Based Hydrogels

Efficient Photocatalysts for Hydrogen Evolution Reaction

verfasst von

Jakob Schlenkrich, Denis Pluta, Rebecca T. Graf, Christoph Wesemann, Franziska Lübkemann-Warwas, Nadja C. Bigall

Abstract

In semiconductor-metal hybrid nanoparticles, excited charge carriers can be separated efficiently by transferring the electron to the metal, because the Fermi level is located within the bandgap of the semiconductor. Besides charge carrier separation, the catalytically active surface of the metal enables the use of these charge carriers for further reactions. Due to limited colloidal stability, the application of nanoparticles in solution is challenging. To circumvent these difficulties, the destabilization can be used to build monolithic 3D (non-ordered) gel-like structures with retained high surface area and an ensured diffusion within the network. Here, the resulting nanoparticle-based hydrogels of CdSe/CdS/Pt nanoparticles show photocatalytic hydrogen production rates up to 58 (mmol(H2))/(g∙h). Due to the self-supporting network structure, colloidal stability is unnecessary, and the applicability is improved. By simply mixing semiconductor and semiconductor–metal hybrid nanoparticles before gelation, the synthesis of the gels allows the reduction of the metal content, which further tunes the photocatalyst.

Organisationseinheit(en)

PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme
Laboratorium für Nano- und Quantenengineering
Institut für Physikalische Chemie und Elektrochemie
Hannover School for Nanotechnology

Externe Organisation(en)

Universität Hamburg
Exzellenzcluster CUI: Advanced Imaging of Matter

Typ

Artikel

Journal

Advanced materials interfaces

Band

11

Anzahl der Seiten

8

ISSN

2196-7350

Publikationsdatum

26.06.2024

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Werkstoffmechanik, Maschinenbau

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1002/admi.202301076 (Zugang: Offen)