Scholarlink

<p>Transition metal phosphides (TMPs) are considered as one of the most promising bifunctional electrocatalysts for overall water splitting due to their high activity and low cost. Herein, NiP nanosheet arrays were grown on nickel-iron foam (NFF) substrates by electrodeposition method. The influence of NaH<sub>2</sub>PO<sub>2</sub>·H<sub>2</sub>O concentration on the morphology and electrocatalytic performance of the NiP/NFF arrays was investigated. The optimized catalyst, prepared at a NaH<sub>2</sub>PO<sub>2</sub> concentration of 0.0212&#xa0;M in the precursor solution, exhibits excellent bifunctional electrocatalytic activity. For the oxygen evolution reaction (OER), it achieves a low overpotential of 303 mV at 100&#xa0;mA cm<sup>−2</sup> and a small Tafel slope of 36.4 mV dec<sup>−1</sup>. For the hydrogen evolution reaction (HER), it delivers an overpotential of 228 mV at 100&#xa0;mA cm<sup>−2</sup> and a Tafel slope of 72.3 mV dec<sup>−1</sup>. The electrolytic cell using NiP/NFF as both cathode and anode achieves a voltage of 1.59&#xa0;V at current density of 10&#xa0;mA cm<sup>−2</sup>. However, the stability of NiP/NFF under HER conditions is poor due to P leaching, phase transformation under reductive potentials, and the appearance of surface cracks.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

NiP/NFF Nanosheet Arrays as an Efficient Bifunctional Electrocatalyst for Water Splitting

  • 期刊论文

  • 发表日期：

    2026年6月25日

查看全文
  • Deyu Xu,
  • Kuidong Wang,
  • Jun Liu,
  • Aixiang. Wei

摘要

Transition metal phosphides (TMPs) are considered as one of the most promising bifunctional electrocatalysts for overall water splitting due to their high activity and low cost. Herein, NiP nanosheet arrays were grown on nickel-iron foam (NFF) substrates by electrodeposition method. The influence of NaH2PO2·H2O concentration on the morphology and electrocatalytic performance of the NiP/NFF arrays was investigated. The optimized catalyst, prepared at a NaH2PO2 concentration of 0.0212 M in the precursor solution, exhibits excellent bifunctional electrocatalytic activity. For the oxygen evolution reaction (OER), it achieves a low overpotential of 303 mV at 100 mA cm−2 and a small Tafel slope of 36.4 mV dec−1. For the hydrogen evolution reaction (HER), it delivers an overpotential of 228 mV at 100 mA cm−2 and a Tafel slope of 72.3 mV dec−1. The electrolytic cell using NiP/NFF as both cathode and anode achieves a voltage of 1.59 V at current density of 10 mA cm−2. However, the stability of NiP/NFF under HER conditions is poor due to P leaching, phase transformation under reductive potentials, and the appearance of surface cracks.

Graphical Abstract