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<p>The controlled construction of three-dimensional electrocatalysts for cost-effective oxygen evolution reaction (OER) and urea oxidation reaction (UOR) in overall water splitting is of great importance for sustainable development. Constructing heterojunctions and further tailoring their structures is an effective strategy for regulating the electronic structure of catalysts and optimizing their active sites. In this study, a three-dimensional spherical NiO–Cr<sub>2</sub>O<sub>3</sub>/NF–P catalyst was prepared via solvothermal treatment and calcination, where P-doping optimizes the electronic structure and induces additional oxygen vacancies. In alkaline electrolyte, the obtained NiO–Cr<sub>2</sub>O<sub>3</sub>/NF–P exhibits activity and stability for OER/UOR, contributing to reduced voltage requirements on the anode side during water splitting. This work offering a novel strategy for the development of low-cost, high-performance electrocatalyst materials.</p> Graphical abstract <p></p>

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Phosphorus-doped modulates the electronic structure of NiO and Cr2O3 heterojunction as electrocatalyst for oxygen evolution and urea oxidation

  • 期刊论文

  • 发表日期：

    2026年3月6日

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  • Xifeng Wang,
  • Rui Hao,
  • Yiyi Wang,
  • Xikai Li,
  • Xiaoxiao Qu,
  • Weiwei Kang,
  • Song Cheng,
  • Huihui Zeng,
  • Baolin Xing,
  • Chuanxiang Zhang

摘要

The controlled construction of three-dimensional electrocatalysts for cost-effective oxygen evolution reaction (OER) and urea oxidation reaction (UOR) in overall water splitting is of great importance for sustainable development. Constructing heterojunctions and further tailoring their structures is an effective strategy for regulating the electronic structure of catalysts and optimizing their active sites. In this study, a three-dimensional spherical NiO–Cr2O3/NF–P catalyst was prepared via solvothermal treatment and calcination, where P-doping optimizes the electronic structure and induces additional oxygen vacancies. In alkaline electrolyte, the obtained NiO–Cr2O3/NF–P exhibits activity and stability for OER/UOR, contributing to reduced voltage requirements on the anode side during water splitting. This work offering a novel strategy for the development of low-cost, high-performance electrocatalyst materials.

Graphical abstract