Lv Jiaqi, Yang Xiaoxuan, Li Ke, Chen Xinyu, Sun Sai, Zang Hong-Ying, Chang Ying-Fei, Wang Yong-Hui, Li Yang-Guang
Key Lab of Polyoxometalate, Science of Ministry of Education, Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University Changchun 130024 Jilin P. R. China
Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University Changchun 130024 Jilin P. R. China
Nanoscale Adv. 2019 Sep 2;1(10):4099-4108. doi: 10.1039/c9na00535h. eCollection 2019 Oct 9.
OER is the key step to increase the rate of water-splitting reaction. Design and construction of appropriate defects is an effective strategy to enhance catalytic activity. Mn has stronger e-e repulsion by the local influence of its 3d orbital electrons. When Mn(iii) was successfully introduced into two dimensional F-doped Ni(OH), it can tune the surface electronic structure of the F-doped Ni(OH) to increase its oxygen deficiency content. In this work, the as-synthesized Mn and F co-doped Ni(OH)-NF on Ni foam (Mn-F/Ni(OH)-NF) shows remarkable oxygen evolution performance, exhibiting 233 mV overpotential at 20 mA cm, and the Tafel slope is 56.9 mV dec in 1 M KOH. The performance is better than that of the same loading of IrO on Ni foam. Density functional theory (DFT) calculations further show that the introduction of oxygen defects can significantly improve the OER catalytic performance of Mn-F/Ni(OH)-NF.
析氧反应（OER）是提高水分解反应速率的关键步骤。设计和构建合适的缺陷是增强催化活性的有效策略。由于其3d轨道电子的局部影响，锰具有更强的电子-电子排斥作用。当Mn(III)成功引入二维F掺杂的Ni(OH)中时，它可以调节F掺杂的Ni(OH)的表面电子结构，以增加其氧缺陷含量。在这项工作中，在泡沫镍上合成的Mn和F共掺杂的Ni(OH)-NF（Mn-F/Ni(OH)-NF）表现出显著的析氧性能，在20 mA cm时过电位为233 mV，在1 M KOH中的塔菲尔斜率为56.9 mV dec。该性能优于相同负载量的泡沫镍负载IrO的性能。密度泛函理论（DFT）计算进一步表明，氧缺陷的引入可以显著提高Mn-F/Ni(OH)-NF的OER催化性能。
