Issue 3, 2018

Ti/Co-S catalyst covered amorphous Si-based photocathodes with high photovoltage for the HER in non-acid environments

Abstract

Making highly efficient photoelectrodes for a photoelectrochemical (PEC) water splitting reaction is vitally important for bringing solar/electrical-to-hydrogen energy conversion processes into reality. Active and stable catalysts in the photoelectrode are the key component in PEC devices. Although most hydrogen evolution catalysts exhibit excellent performance in acid solutions, earth abundant oxygen evolution catalysts are generally unstable. Therefore, the elaborate design of highly active and stable photocathodes possessing great onset potential in non-acid environments is imperative. Here, we report that magnetron sputtering and electrochemical-deposition preparation methods are compatible with photo-absorbers for depositing titanium (Ti)/cobalt–sulfide (Co–S) catalyst on amorphous silicon/amorphous silicon (a-Si/a-Si) tandem solar cells, realizing a stable, low-cost, and efficient photocathode for water splitting in non-acid solutions. This photocathode exhibits a high photocurrent onset potential of 1.78 V vs. reversible hydrogen electrode (RHE) in alkaline and neutral electrolyte, with a photocurrent of 6.34 mA cm−2 at 0 V vs. RHE. The facile preparation of this highly active a-Si/a-Si/Ti/Co–S photocathode paves the way to integrate them into various oxygen evolution catalysts to develop highly efficient, low-cost, and monolithic PEC solar water splitting devices.

Graphical abstract: Ti/Co-S catalyst covered amorphous Si-based photocathodes with high photovoltage for the HER in non-acid environments

Supplementary files

Article information

Article type
Communication
Submitted
30 Nhl 2017
Accepted
06 N’w 2017
First published
07 N’w 2017

J. Mater. Chem. A, 2018,6, 811-816

Ti/Co-S catalyst covered amorphous Si-based photocathodes with high photovoltage for the HER in non-acid environments

Q. Zhang, T. Li, J. Luo, B. Liu, J. Liang, N. Wang, X. Kong, B. Li, C. Wei, Y. Zhao and X. Zhang, J. Mater. Chem. A, 2018, 6, 811 DOI: 10.1039/C7TA09569D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements