Developing low-cost, high-performance and corrosion-resistant catalysts for water splitting is anticipated, but it will also be a big challenge. In this study, nanowall-like N-Ni₅P₄/Ni₂P/NF (N-NiP/NF) was synthesized by a simple two-step method involving hydrothermal treatment and phosphorylation. The catalyst has good catalytic activity for the OER, and only 160 mV is required to achieve a current density of 10 mA cm⁻² in 1 M KOH, which is even better than RuO₂, with good corrosion resistance. In addition, N-Co₂P/Ni₂P/NF (N-CoP/NF) was synthesized by the same method with good electrocatalytic properties and good conductivity towards the HER. N-NiP/NF was used as the anode and N-CoP/NF was used as the cathode to form the N-NiP//N-CoP double electrode system, which showed excellent electrolytic performance for water splitting, requiring only 1.48 V to reach 10 mA cm⁻². This is mainly due to the strong electronegativity of N that makes the N doping induce the electron transfer process, which results in a high catalytic activity of the adjacent transition metal atoms and thus promotes the electrolysis of water, as well as the unique vertical nanowall-like structure, which gives the material a large surface area and accessibility to active sites, facilitating the adsorption of water molecules and catalytic reactions. In addition, the unique structure favors the diffusion of water molecules and the release of gaseous products, ensuring close contact between the catalyst and the electroactive material. This simple non-metallic N doping strategy provides a new way to produce efficient non-precious metal catalysts.

中文翻译：

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用于析氧反应的垂直生长纳米壁状 N 掺杂 NiP/NF 电催化剂

开发低成本、高性能和耐腐蚀的水分解催化剂是值得期待的，但这也将是一个巨大的挑战。在这项研究中，纳米壁状 N-Ni ₅ P ₄ /Ni ₂ P/NF (N-NiP/NF) 通过水热处理和磷酸化的简单两步法合成。该催化剂对OER具有良好的催化活性，仅需160 mV即可在1 M KOH中达到10 mA cm ^-2的电流密度，甚至优于RuO ₂，​​具有良好的耐腐蚀性。此外，N-Co ₂ P/Ni ₂P/NF（N-CoP/NF）通过相同的方法合成，具有良好的电催化性能和对HER的良好导电性。以N-NiP/NF为阳极，N-CoP/NF为阴极，形成N-NiP//N-CoP双电极体系，表现出优异的水分解电解性能，仅需1.48 V即可达到 10 mA cm ^-2. 这主要是由于 N 的强电负性使 N 掺杂诱导电子转移过程，从而导致相邻过渡金属原子的高催化活性从而促进水的电解，以及独特的垂直纳米壁-类似的结构，这使材料具有较大的表面积和活性位点的可及性，有利于水分子的吸附和催化反应。此外，独特的结构有利于水分子的扩散和气态产物的释放，确保催化剂与电活性材料之间的紧密接触。这种简单的非金属氮掺杂策略提供了一种生产高效非贵金属催化剂的新方法。