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Self-supported Ru-doped NiMoO4 for efficient hydrogen evolution with 1000 mA cm-2 at a low overpotential
Pengfei Xue1, Man Qiao1, Juhong Miao1
1School of Chemistry and Materials Science, Institute of Advanced Materials and Flexible Electronics (IAMFE), Nanjing University of Information Science and Technology, Nanjing 210044, China. dd.zhu@nuist.edu.cn.
Ruthenium-doped Nickel Molybdenum Oxide (Ru-NiMoO4) demonstrates superior performance for electrocatalytic hydrogen evolution. This advanced catalyst offers high efficiency and excellent durability in alkaline environments.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Nickel Molybdenum Oxide (NiMoO4) is a promising material for electrocatalysis.
- Developing efficient and durable electrocatalysts for hydrogen evolution is crucial for clean energy technologies.
Purpose of the Study:
- To synthesize self-supported Ruthenium-doped Nickel Molybdenum Oxide (Ru-NiMoO4) on commercial NiMo foam.
- To evaluate the electrocatalytic performance of Ru-NiMoO4 for hydrogen evolution reactions (HER).
Main Methods:
- Synthesis of self-supported Ru-NiMoO4 on NiMo foam.
- Electrochemical characterization using techniques such as linear sweep voltammetry and chronoamperometry.
- Durability testing in alkaline solution.
Main Results:
- Ru-NiMoO4 exhibits extremely high performance for electrocatalytic hydrogen evolution.
- A small overpotential of 170.6 mV was required to achieve a current density of 1000 mA cm⁻².
- The catalyst demonstrated excellent durability, maintaining performance for 150 hours in an alkaline solution.
Conclusions:
- Self-supported Ru-NiMoO4 is a highly efficient and durable electrocatalyst for hydrogen evolution.
- The doping of ruthenium significantly enhances the catalytic activity of NiMoO4.
- This material holds great potential for applications in alkaline water electrolysis.
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