Synergizing hole accumulation and transfer on composite Ni/CoOx for photoelectrochemical water oxidation

Wei Wang; Marc Heggen; Wei Cui; Benjamin Probst; Roger Alberto; Chunhua Cui

doi:10.1039/d0cc03717f

Synergizing hole accumulation and transfer on composite Ni/CoO_x for photoelectrochemical water oxidation

Chem Commun (Camb). 2020 Sep 1;56(70):10179-10182. doi: 10.1039/d0cc03717f.

Authors

Wei Wang¹, Marc Heggen², Wei Cui³, Benjamin Probst³, Roger Alberto³, Chunhua Cui⁴

Affiliations

¹ School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China. wei.wang@uestc.edu.cn.
² Ernst Ruska Center for Microscopy and Spectroscopy with Electrons, Forschungszentrum Juelich GmbH, 52425 Juelich, Germany.
³ Department of Chemistry, University of Zurich, Winterthurerstr. 190, CH-8057 Zurich, Switzerland.
⁴ Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China. chunhua.cui@uestc.edu.cn.

PMID: 32748920
DOI: 10.1039/d0cc03717f

Abstract

Ni/CoOx sites were supported on an around 2 nm-TiOx modified hematite photoanode for water oxidation. TiOx demonstrates insignificant hole accumulation and a catalytically inactive surface that serves as an ideal platform. We reveal that the NiOx favors the extraction of holes from the TiOx surface, which are efficiently transferred to active CoOx for water oxidation.