Combinatorial synthesis and high-throughput photopotential and photocurrent screening of mixed-metal oxides for photoelectrochemical water splitting

Jordan E. Katz, Todd R. Gingrich, Elizabeth A. Santori, Nathan S Lewis

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

A high-throughput method has been developed using a commercial piezoelectric inkjet printer for synthesis and characterization of mixed-metal oxide photoelectrode materials for water splitting. The printer was used to deposit metal nitrate solutions onto a conductive glass substrate. The deposited metal nitrate solutions were then pyrolyzed to yield mixed-metal oxides that contained up to eight distinct metals. The stoichiometry of the metal oxides was controlled quantitatively, allowing for the creation of vast libraries of novel materials. Automated methods were developed to measure the open-circuit potentials (Eoc), short-circuit photocurrent densities (J sc), and current density vs. applied potential (J-E) behavior under visible light irradiation. The high-throughput measurement of Eoc is particularly significant because open-circuit potential measurements allow the interfacial energetics to be probed regardless of whether the band edges of the materials of concern are above, close to, or below the values needed to sustain water electrolysis under standard conditions. The Eoc measurements allow high-throughput compilation of a suite of data that can be associated with the composition of the various materials in the library, to thereby aid in the development of additional screens and to form a basis for development of theoretical guidance in the prediction of additional potentially promising photoelectrode compositions.

Original languageEnglish
Pages (from-to)103-112
Number of pages10
JournalEnergy and Environmental Science
Volume2
Issue number1
DOIs
Publication statusPublished - 2009

Fingerprint

Photocurrents
Oxides
Screening
Metals
Throughput
Water
metal
nitrate
Nitrates
water
stoichiometry
electrokinesis
irradiation
energetics
Networks (circuits)
glass
Chemical analysis
Electrolysis
substrate
Stoichiometry

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Chemistry
  • Pollution
  • Nuclear Energy and Engineering

Cite this

Combinatorial synthesis and high-throughput photopotential and photocurrent screening of mixed-metal oxides for photoelectrochemical water splitting. / Katz, Jordan E.; Gingrich, Todd R.; Santori, Elizabeth A.; Lewis, Nathan S.

In: Energy and Environmental Science, Vol. 2, No. 1, 2009, p. 103-112.

Research output: Contribution to journalArticle

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