Department of Chemistry, Northeast Normal University, Jilin Provincial Key Laboratory of Advanced Energy Materials, 130024, Changchun, P.R. China.
College of Chemistry, Jilin University, State Key Laboratory of Inorganic Synthesis and Preparative, Changchun, 130022, P.R. China.
Chemistry. 2018 Sep 3;24(49):13002-13008. doi: 10.1002/chem.201802325. Epub 2018 Jul 30.
In this work, a series of three-dimensional porous flower-like zinc doped NiCo O (ZNCO) nanostructures with different Zn doping level are successfully prepared by a facile solvothermal process without using any templets. The obtained products are characterized by various techniques, and their electrocatalytic performances are also assessed by the oxygen evolution reaction (OER). According to the electrochemical characterization, it is demonstrated that ZNCO-0.15 (i.e., Zn Ni Co O ) nanoflowers show a lower overpotential, smaller Tafel slope, higher electrochemical active surface area (ECSA), as well as a larger turnover frequency (TOF) value than those of Co O , NiCo O , and ZnCo O nanoflowers, indicating that introduction of an optimal content of zinc ions plays an important role in enhancing electrocatalytic performances for OER. The enhanced OER performance of ZNCO-0.15 could be attributed to the increased number of active sites (Co ), accelerated kinetic rate, and promoted conductivity of the catalyst with the incorporation of zinc ions.
在这项工作中，通过一种简单的溶剂热工艺，无需使用任何模板，成功制备了一系列具有不同锌掺杂水平的三维多孔花状锌掺杂 NiCoO（ZNCO）纳米结构。通过各种技术对所得产物进行了表征，并通过析氧反应（OER）评估了它们的电催化性能。根据电化学表征，证明 ZnNiCoO（即 ZNCO-0.15）纳米花具有更低的过电位、更小的塔菲尔斜率、更高的电化学活性表面积（ECSA）以及更大的周转频率（TOF）值比 CoO、NiCoO 和 ZnCoO 纳米花，表明引入最佳含量的锌离子对增强 OER 的电催化性能起着重要作用。ZNCO-0.15 的增强 OER 性能可归因于锌离子的掺入增加了活性位点（Co）的数量、加速了动力学速率以及促进了催化剂的导电性。
