Trends in Activity and Dissolution on RuO2 under Oxygen Evolution Conditions: Particles versus Well-Defined Extended Surfaces

Claudie Roy; Reshma R. Rao; Kelsey A. Stoerzinger; Jonathan Hwang; Jan Rossmeisl; Ib Chorkendorff; Yang Shao-Horn; Ifan E.L. Stephens

doi:10.1021/acsenergylett.8b01178

Trends in Activity and Dissolution on RuO₂ under Oxygen Evolution Conditions: Particles versus Well-Defined Extended Surfaces

Claudie Roy, Reshma R. Rao, Kelsey A. Stoerzinger, Jonathan Hwang, Jan Rossmeisl, Ib Chorkendorff, Yang Shao-Horn, Ifan E.L. Stephens

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160 Scopus citations

Abstract

Rutile RuO₂ catalysts are the most active pure metal oxides for oxygen evolution; however, they are also unstable toward dissolution. Herein, we study the catalytic activity and stability of oriented thin films of RuO₂ with (111), (101), and (001) orientations, in comparison to a (110) single crystal and commercial nanoparticles. These surfaces were all tested in aqueous solutions of 0.05 M H₂SO₄. The initial catalyst activity ranked as follows: (001) > (101) > (111) ≈ (110). We complemented our activity data with inductively coupled plasma mass spectroscopy, to measure Ru dissolution products occurring in parallel to oxygen evolution. In contrast to earlier reports, we find that, under our experimental conditions, there is no correlation between the activity and stability.

Original language	English (US)
Pages (from-to)	2045-2051
Number of pages	7
Journal	ACS Energy Letters
Volume	3
Issue number	9
DOIs	https://doi.org/10.1021/acsenergylett.8b01178
State	Published - Sep 14 2018
Externally published	Yes

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Publisher Copyright:
© 2018 American Chemical Society.

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10.1021/acsenergylett.8b01178

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title = "Trends in Activity and Dissolution on RuO2 under Oxygen Evolution Conditions: Particles versus Well-Defined Extended Surfaces",

abstract = "Rutile RuO2 catalysts are the most active pure metal oxides for oxygen evolution; however, they are also unstable toward dissolution. Herein, we study the catalytic activity and stability of oriented thin films of RuO2 with (111), (101), and (001) orientations, in comparison to a (110) single crystal and commercial nanoparticles. These surfaces were all tested in aqueous solutions of 0.05 M H2SO4. The initial catalyst activity ranked as follows: (001) > (101) > (111) ≈ (110). We complemented our activity data with inductively coupled plasma mass spectroscopy, to measure Ru dissolution products occurring in parallel to oxygen evolution. In contrast to earlier reports, we find that, under our experimental conditions, there is no correlation between the activity and stability.",

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T2 - Particles versus Well-Defined Extended Surfaces

AU - Roy, Claudie

AU - Rao, Reshma R.

AU - Stoerzinger, Kelsey A.

AU - Hwang, Jonathan

AU - Rossmeisl, Jan

AU - Chorkendorff, Ib

AU - Shao-Horn, Yang

AU - Stephens, Ifan E.L.

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AB - Rutile RuO2 catalysts are the most active pure metal oxides for oxygen evolution; however, they are also unstable toward dissolution. Herein, we study the catalytic activity and stability of oriented thin films of RuO2 with (111), (101), and (001) orientations, in comparison to a (110) single crystal and commercial nanoparticles. These surfaces were all tested in aqueous solutions of 0.05 M H2SO4. The initial catalyst activity ranked as follows: (001) > (101) > (111) ≈ (110). We complemented our activity data with inductively coupled plasma mass spectroscopy, to measure Ru dissolution products occurring in parallel to oxygen evolution. In contrast to earlier reports, we find that, under our experimental conditions, there is no correlation between the activity and stability.

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