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Updated: Jan 14, 2026

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
Temperature-dependent mechanism evolution on RhRu3Ox for acidic water oxidation
Ming-Rong Qu1, Heng Liu2, Si-Hua Feng3
1Department of Chemistry, New Cornerstone Science Laboratory, Institute of Biomimetic Materials and Chemistry, Anhui Engineering Laboratory of Biomimetic Materials, Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China.
Abstract:
The oxygen evolution reaction, as the anodic reaction of many electrochemical devices, plays a crucial role in energy conversion. However, the insufficient stability of non-iridium-based materials during the oxygen evolution reaction has severely limited the large-scale application of such devices. Here, using a home-made operando differential electrochemical mass spectrometry system, we show a temperature dependent mechanism evolution effect of RhRu3Ox in the oxygen evolution process, which highlights the role of temperature in triggering mechanism evolution. This effect enriches the strategies for pathway manipulation. Since different kinetic pathways can influence catalyst stability, this finding suggests that temperature-dependent pathway regulation may serve as an approach to optimize stability. To evaluate the potential of RhRu3Ox for practical applications, we assemble it into a proton exchange membrane electrolyzer and demonstrate its stability at room temperature for over 1000 hours at a current density of 200 mA cm-2. Density functional theory studies suggest that the existence of a kinetic barrier related to lattice oxygen activation might be the reason for the observed temperature dependent behavior of RhRu3Ox at elevated temperatures.
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