International Journal of Hydrogen Energy· 2026Q1
Low-Pt Pt/NiMo-C catalysts for high-performance hydrogen evolution in anion exchange membrane water electrolysis
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- Q1SCImago
- 2026year
Short summary
A new Pt/NiMo-C catalyst with only 0.988 wt% Pt (49.4 μg Pt cm−2 loading) achieves high hydrogen evolution activity (45.4 mV at −10 mA cm−2) and stability, outperforming commercial 20 wt% Pt/C in alkaline conditions.
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Key points
- Developed Pt/NiMo-C catalyst with 0.988 wt% Pt loading (49.4 μg Pt cm−2).
- Achieved 45.4 mV overpotential at −10 mA cm−2 and a Tafel slope of 39.5 mV dec−1 in 1.0 M KOH.
- Outperformed commercial 20 wt% Pt/C in hydrogen evolution reaction (HER) activity.
- Demonstrated long-term stability (>280 h) and high performance (1.0 A cm−2 at 2.18 V) in a 9 cm2 AEMWE cell.
AI-generated from the title and abstract; the full text is not read.
Abstract
The development of electrocatalysts with reduced platinum-group-metal content is crucial for advancing anion exchange membrane water electrolysis (AEMWE). Here, platinum was incorporated into a carbon-supported NiMo-derived catalyst via impregnation and reductive thermal treatment. The resulting Pt/NiMo-C contained 2.47 wt% Pt within the metallic fraction, corresponding to 0.988 wt% overall and a cathode loading of 49.4 μg Pt cm −2 . In 1.0 M KOH, the catalyst required only 45.4 mV to reach −10 mA cm −2 and exhibited a Tafel slope of 39.5 mV dec −1 , outperforming commercial 20 wt% Pt/C. Long-term stability was confirmed over 280 h of chronopotentiometry with minimal potential drift. As the cathode in a 9 cm 2 AEMWE paired with IrO 2 , Pt/NiMo-C delivered 1.0 A cm −2 at 2.18 V (1.81 V after iR correction) at 60 °C. These findings highlight Pt/NiMo-C as a promising low-Pt cathode, combining reduced noble-metal usage with competitive HER activity and AEMWE performance.
The authors' abstract, as published at the source. International Journal of Hydrogen Energy, 2026 · DOI ↗
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Field: Renewable Energy, Sustainability and the Environment
Renewable Energy, Sustainability and the EnvironmentEnergy