Highly active oxide photocathode for photoelectrochemical water reduction View Full Text


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Article Info

DATE

2011-06

AUTHORS

Adriana Paracchino, Vincent Laporte, Kevin Sivula, Michael Grätzel, Elijah Thimsen

ABSTRACT

A clean and efficient way to overcome the limited supply of fossil fuels and the greenhouse effect is the production of hydrogen fuel from sunlight and water through the semiconductor/water junction of a photoelectrochemical cell, where energy collection and water electrolysis are combined into a single semiconductor electrode. We present a highly active photocathode for solar H(2) production, consisting of electrodeposited cuprous oxide, which was protected against photocathodic decomposition in water by nanolayers of Al-doped zinc oxide and titanium oxide and activated for hydrogen evolution with electrodeposited Pt nanoparticles. The roles of the different surface protection components were investigated, and in the best case electrodes showed photocurrents of up to -7.6 mA cm(-2) at a potential of 0 V versus the reversible hydrogen electrode at mild pH. The electrodes remained active after 1 h of testing, cuprous oxide was found to be stable during the water reduction reaction and the Faradaic efficiency was estimated to be close to 100%. More... »

PAGES

456

References to SciGraph publications

  • 1998-01. Sol-Gel Coatings on 316L Steel for Clinical Applications in JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
  • 2004-07. Performance of Cu2O/ZnO Solar Cell Prepared By Two-Step Electrodeposition in JOURNAL OF APPLIED ELECTROCHEMISTRY
  • 2001-11. Photoelectrochemical cells in NATURE
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    http://scigraph.springernature.com/pub.10.1038/nmat3017

    DOI

    http://dx.doi.org/10.1038/nmat3017

    DIMENSIONS

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    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/21552270


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