Different Photostability of BiVO4in Near-pH-Neutral Electrolytes

Zhang S, Ahmet I, Kim SH, Kasian O, Mingers AM, Schnell P, Kölbach M, Lim J, Fischer A, Mayrhofer K, Cherevko S, Gault B, Van De Krol R, Scheu C (2020)

Publication Type: Journal article

Publication year: 2020

Journal

ACS Applied Energy Materials American Chemical Society

DOI: 10.1021/acsaem.0c01904

Abstract

Photoelectrochemical water splitting is a promising route to produce hydrogen from solar energy. However, corrosion of photoelectrodes remains a fundamental challenge for their implementation. Here, we reveal different dissolution behaviors of BiVO4 photoanode in pH-buffered borate, phosphate, and citrate (hole-scavenger) electrolytes, studied in operando employing an illuminated scanning flow cell. We demonstrate that decrease in photocurrents alone does not reflect the degradation of photoelectrodes. Changes in dissolution rates correlate to the evolution of surface chemistry and morphology. The correlative measurements on both sides of the liquid-semiconductor junction provide quantitative comparison and mechanistic insights into the degradation processes.

Authors with CRIS profile

Karl Mayrhofer Lehrstuhl für Elektrokatalyse (HIERN)

Involved external institutions

Max-Planck-Institut für Eisenforschung GmbH (MPIE) / Max Planck Institute for Iron Research DE Germany (DE) Albert-Ludwigs-Universität Freiburg DE Germany (DE) Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) DE Germany (DE) Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE)

How to cite

APA:

Zhang, S., Ahmet, I., Kim, S.H., Kasian, O., Mingers, A.M., Schnell, P.,... Scheu, C. (2020). Different Photostability of BiVO4in Near-pH-Neutral Electrolytes. ACS Applied Energy Materials. https://dx.doi.org/10.1021/acsaem.0c01904

MLA:

Zhang, Siyuan, et al. "Different Photostability of BiVO4in Near-pH-Neutral Electrolytes." ACS Applied Energy Materials (2020).

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