International Journal of Hydrogen Energy· 2026Q1
Unravelling the mechanism involved behind superior alkaline water electrolysis achieved from CeVO4/BiVO4 electrocatalytic system
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- 2026year
Short summary
A novel CeVO4/BiVO4 electrocatalytic system achieves superior alkaline water electrolysis, reaching a low cell potential of ~1.52 V at 10 mA cm−2 and maintaining ~85% of its initial current density after 200 hours of operation.
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Key points
- A novel CeVO4/BiVO4 electrocatalytic system was developed for alkaline water electrolysis.
- The optimized system achieved a low cell potential of ~1.52 V at 10 mA cm−2.
- The catalyst demonstrated exceptional stability, with ~85% current density retention after 200 hours.
- Performance is attributed to synergistic effects, optimized electronic structures, and controlled morphology.
AI-generated from the title and abstract; the full text is not read.
Abstract
Electrocatalytic water splitting system provides advantages to extract maximum from both OER and HER electrocatalysts. Here, we report a novel electrocatalytic system comprising of p-type CeVO 4 and n-type BiVO 4 as oxygen and hydrogen evolution catalysts, respectively. The optimized 0.5 mol (urea + NH 4 F) composition for both CeVO 4 and BiVO 4 demonstrates enhanced crystallinity, optimal particle size distribution, and superior structural integrity. Operating in alkaline medium of 1 M KOH, this binary system achieves remarkable water splitting performance with a notably low cell potential of ∼1.52 V at 10 mA cm −2 , outperforming the benchmark conventional system. The catalyst system maintains exceptional stability, exhibiting only ∼15% current density decay over 200 h of continuous operation and a minimal overpotential increase of ∼20 mV after 200 h. This outstanding performance is attributed to the synergistic effects between the metal centers, optimized electronic structures, and carefully controlled morphology of both catalysts.
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