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July 16, 2026ACS Applied Energy Materials

One-Precursor, Two-Tailored MnO 2 Catalysts for Efficient and Durable Overall Alkaline Water Splitting

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Authors

MLMinh Hoang LeKTKieu Thuy Thi TranKDKhoa Anh Nguyen Do

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Overview

Randomized trial demonstrates enhanced oxygen and hydrogen evolution in water splitting, indicating effective catalyst design.

Key Points

  • The objective is to develop a catalyst that optimizes the oxygen and hydrogen evolution reactions in water electrolysis.
  • Developed a sequential design strategy using a single MnO2 precursor, focusing on independent optimization of the OER and HER.
  • Synthesize birnessite-type MnO2 at 250 °C and modify with 5% phosphorus to enhance HER performance.
  • Tested catalyst performance in a two-electrode configuration under specified conditions.
  • Achieved an overpotential of 286 mV for OER at 20 mA cm−2 and 20 mV for HER at 10 mA cm−2 with the tailored catalyst.
  • Demonstrated efficient overall water splitting at a low cell voltage of 1.47 V at 10 mA cm−2.
  • Maintained high Faradaic efficiency and stable operation for over 100 hours at elevated current densities.

Cite This Study

Le et al. (2026) studied this question.

synapsesocial.com/papers/6a5874e82b46c88ba9ad0de7https://doi.org/10.1021/acsaem.6c01624
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