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Updated: Aug 17, 2025
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Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
Published on: June 21, 2017
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Observation of a robust and active catalyst for hydrogen evolution under high current densities
Yudi Zhang1,2, Kathryn E Arpino3, Qun Yang3
1CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.
Nature Communications
|December 16, 2022
Summary
New strontium ruthenate (Sr2RuO4) crystals show excellent durability for hydrogen production catalysts. These catalysts perform effectively at high current densities, paving the way for industrial applications.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Developing durable hydrogen production catalysts for high current densities remains a challenge.
- Existing catalysts often lack stability under industrial-scale operational demands.
Purpose of the Study:
- To investigate the catalytic properties of Sr2RuO4 bulk single crystals for hydrogen evolution reaction (HER).
- To assess the durability and performance of Sr2RuO4 under high current densities and elevated temperatures.
Main Methods:
- Electrochemical testing of Sr2RuO4 single crystals in acidic (0.5 M H2SO4) and alkaline (1 M KOH) electrolytes.
- In-situ characterization to observe surface changes during catalysis.
- Long-term stability testing at high current densities (>1000 mA cm-2) and 70 °C.
Main Results:
- Sr2RuO4 demonstrated remarkable HER activity, requiring low overpotentials (182 mV in H2SO4, 278 mV in KOH) at 1000 mA cm-2.
- The catalyst maintained stability for 56 days of continuous operation under demanding conditions.
- In-situ formation of ferromagnetic Ruthenium (Ru) clusters on the surface was observed, enhancing catalyst performance.
Conclusions:
- Sr2RuO4 single crystals exhibit excellent activity and durability for HER at industrial-scale current densities.
- The formation of Ru clusters contributes to improved charge transfer and wettability, facilitating gas bubble removal.
- These findings highlight the potential of Sr2RuO4 in designing next-generation HER catalysts.
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