Detection of hydrogen reaction at ruthenium oxide interface at room temperature

What is it about?

Using interface-sensitive measurement techniques of electrical resistance, we studied the reducing reaction for conducting ruthenium oxide SrRuO3 in a hydrogen environment near room temperature. We found that the partial reduction occurs at the SrRuO3-metal interface even at room temperature (much lower than the bulk reducing temperature). We also found that the reducing rates depend on the stability of the metal oxides present in the electrode against the reducing environment; that is, the reaction rate is higher in more unstable oxides.

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Photo by Chris Ried on Unsplash

Photo by Chris Ried on Unsplash

Why is it important?

We demonstrate that the interface electrical resistance measurement technique is a powerful method to detect the chemical reaction of conducting materials interface. One can separate the bulk and interface reaction by resistance measurements.

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