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April 10, 2026Journal of the American Chemical Society

Regulating Surface Hydroxyl Groups in CoO x via Atomically Dispersed Ru for Durable Acidic Oxygen Evolution

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Authors

WHWei HuJZJing ZhangYFYalei Fan

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Overview

Experimental and theoretical analyses improve OER performance in CoO by regulating hydroxyl coverage through Ru anchoring.

Key Points

  • This research aims to enhance the durability and activity of CoO-based catalysts in the acidic oxygen evolution reaction (OER) by modulating surface hydroxyl groups using atomically dispersed Ru.
  • Utilized CoO<sub>x</sub> as a support for Ru sites.
  • Conducted high-temperature treatment (≥450 °C) to modify CoO<sub>x</sub> properties.
  • Performed experimental and theoretical analyses to investigate electronic structures and valence states.
  • Ru/Co<sub>3</sub>O<sub>4</sub> achieved an overpotential of 280 mV at 50 mA cm<sup>-2</sup>.
  • Maintained negligible potential loss over 1000 hours at 50 mA cm<sup>-2</sup> in acidic conditions.
  • Demonstrated stable operation in a proton exchange membrane water electrolysis device for 450 hours at 0.2 A cm<sup>-2</sup> and 200 hours at 0.5 A cm<sup>-2</sup>.

Cite This Study

Hu et al. (2026) studied this question.

synapsesocial.com/papers/69d896a46c1944d70ce081f4https://doi.org/10.1021/jacs.6c01807
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