Photoelectrochemical water splitting (PEC-WS) is a promising route to obtain hydrogen (and oxygen) from sunlight and water. However, too many semiconductors show poor stability, due to photodegradation phenomena in aqueous solutions, thus loosing efficiency under operative conditions. Aim of this paper is to introduce a simple and fast method for screening different semiconductor materials and identify their efficiency in H2 (or O2) production with respect to photocorrosion. This method could be used with any finely dispersed semiconductor (powder) for a fast, preliminary evaluation of the material's behaviour without interferences from the supporting material (i. e. FTO) or any binder. The method is based on the combination of scanning electrochemical microscopy (SECM) in the tip generation/substrate collection (TG/SC) mode and of cavity microelectrodes as SECM tips. Here, we show results obtained on three powder materials, namely core-shell CuI/CuO, CuI and TiO2.

Determining the Efficiency of Photoelectrode Materials by Coupling Cavity‐Microelectrode Tips and Scanning Electrochemical Microscopy / A. Visibile, T. Baran, S. Rondinini, A. Minguzzi, A. Vertova. - In: CHEMELECTROCHEM. - ISSN 2196-0216. - 7:11(2020), pp. 2440-2447.

Determining the Efficiency of Photoelectrode Materials by Coupling Cavity‐Microelectrode Tips and Scanning Electrochemical Microscopy

Visibile, Alberto;Baran, Tomasz;Rondinini, Sandra;Minguzzi, Alessandro;Vertova, Alberto
2020

Abstract

Photoelectrochemical water splitting (PEC-WS) is a promising route to obtain hydrogen (and oxygen) from sunlight and water. However, too many semiconductors show poor stability, due to photodegradation phenomena in aqueous solutions, thus loosing efficiency under operative conditions. Aim of this paper is to introduce a simple and fast method for screening different semiconductor materials and identify their efficiency in H2 (or O2) production with respect to photocorrosion. This method could be used with any finely dispersed semiconductor (powder) for a fast, preliminary evaluation of the material's behaviour without interferences from the supporting material (i. e. FTO) or any binder. The method is based on the combination of scanning electrochemical microscopy (SECM) in the tip generation/substrate collection (TG/SC) mode and of cavity microelectrodes as SECM tips. Here, we show results obtained on three powder materials, namely core-shell CuI/CuO, CuI and TiO2.
Settore CHIM/02 - Chimica Fisica
Settore CHIM/01 - Chimica Analitica
CHEMELECTROCHEM
Article (author)
File in questo prodotto:
File Dimensione Formato  
Accepted Article.pdf

accesso aperto

Tipologia: Pre-print (manoscritto inviato all'editore)
Dimensione 833.13 kB
Formato Adobe PDF
833.13 kB Adobe PDF Visualizza/Apri
celc.202000432.pdf

non disponibili

Tipologia: Publisher's version/PDF
Dimensione 3.41 MB
Formato Adobe PDF
3.41 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/737949
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact