Compared with the traditional Haber Bosch process, green and pollution-free electrocatalytic nitrogen reduction (NRR) has received considerable attention in the electrocatalysis field in the last decade. To address the issue of its low reactivity as well as the existence of competitive reactions, efficient electrocatalysts are particularly important. In this paper, NiO nanomaterials were synthesized by a simple water bath reaction. The effect of different calcination temperatures on the structure of NiO catalyst and its catalytic activity was studied. Uniform NiO-600 nanoparticles (56 ± 9.3 nm) obtained at 600 ℃ showed the best electrocatalytic NRR activity with an NH₃ yield of 12 μg h⁻¹ mg⁻¹ and a Faraday efficiency of 5.5% at -0.5V (vs.RHE). The small particle size of the nanoparticles provided more active sites and the oxygen-rich vacancies facilitated the adsorption and activation of N₂, which improved the catalytic activity of NiO-600. This study highlights the need for calcination temperature regulation and the huge impact on catalyst structure.

与传统的哈伯博世工艺相比，绿色无污染的电催化氮还原（NRR）近十年来在电催化领域受到了相当多的关注。为了解决其反应活性低以及存在竞争反应的问题，高效的电催化剂尤为重要。本文通过简单的水浴反应合成了 NiO 纳米材料。研究了不同焙烧温度对NiO催化剂结构及其催化活性的影响。在600 ℃下获得的均匀NiO-600纳米颗粒（56 ± 9.3 nm）表现出最佳的电催化NRR活性，NH ₃产率为12 μg h ⁻¹ mg ⁻¹，-0.5V时法拉第效率为5.5%（vs.RHE） ）。纳米颗粒的小粒径提供了更多的活性位点，富氧空位有利于N ₂的吸附和活化，从而提高了NiO-600的催化活性。这项研究强调了煅烧温度调节的必要性及其对催化剂结构的巨大影响。