Photoelectrochemical water oxidation reaction for coated and meta-chemical surface electrodes with Na3[Ru2(μ-CO3)4]

Shiran Aharon, Shanti Gopal Patra, Krishna K. Yadav, Moshe Zohar, Dan Meyerstein, Eyal Tzur, Dror Shamir, Yael Albo, Ariela Burg

Research output: Contribution to journalArticlepeer-review


The most economical and efficient method to produce green hydrogen relies on electrochemistry, the electricity for which is of a green origin, and on photocatalytic water splitting. The latter technology involves the use of a photocatalyst or a photo-electrocatalyst to transform solar energy into chemical energy. Vast efforts have thus been dedicated to the pursuit of such a catalyst. The current study focused on the development of a heterogeneous photoelectrochemical system in which the Na3[Ru2(μ-CO3)4] complex was used as a WOC. To that end, two types of electrodes were prepared: coated indium tin oxide (ITO) and meta-chemical surface (MCS) electrodes. Under 420 nm illumination, both electrode types exhibited higher catalytic currents than were observed without light. Our novel application of the Na3[Ru2(μ-CO3)4] complex as a catalyst in the photoelectrochemical water oxidation reaction requires minute amounts of the complex. The study findings add to the knowledge about the water-splitting process, and ultimately, they may facilitate the broader adoption of hydrogen as an environmentally friendly and increasingly accessible energy source.

Original languageEnglish
Pages (from-to)1058-1068
Number of pages11
JournalInternational Journal of Hydrogen Energy
StatePublished - 27 Jun 2024


  • Alternative energy
  • Heterogeneous electrocatalysis
  • Meta-chemical surface
  • Photoelectrochemical water oxidation reaction
  • Ruthenium complex
  • Sol-gel processes


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