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In Situ Growth of Hollow Trimetallic Nanocubes on Nickel Foam for the Electrocatalytic Oxygen Evolution Reaction
ChemElectroChem ( IF 4 ) Pub Date : 2020-11-10 , DOI: 10.1002/celc.202001356
Zhuzhu Li 1 , Puhui Deng 1 , Xue Zhang 1 , Linping Zhang 1 , Yu Hou 1
Affiliation  

Nanomaterials derived from Prussian blue (PB) and its analogues (PBAs) possess uniform active centers and large surface areas, which can be applied in the field of electrocatalysis. In this study, nickel‐iron‐cobalt trimetallic PBAs, that is, NiFeCo(4 : 1)PBA nanocubes, were grown in situ on nickel foam (NF), which was subsequently calcined in air to obtain a composite electrode, NiO/FeOX/Co3O4@NF, with a loose porous hollow nanocube morphology. This structure remarkably enlarged the contact area between the electrolyte and the catalyst. In addition, a synergistic effect among these metallic oxides expedited oxygen evolution reaction (OER) kinetics. The Tafel slope (71.25 mV dec−1) toward OER of the constructed electrode is fairly small, much lower than that of our prepared bimetallic oxides@NF electrodes. The enduring stability is more than 22 h. This work indicates that, through morphology and composition control, the electrocatalytic performance of the designed electrode can be effectively improved.

中文翻译:

空心三金属纳米晶在镍泡沫上原位生长用于电催化氧释放反应

源自普鲁士蓝(PB)及其类似物(PBA)的纳米材料具有均匀的活性中心和较大的表面积,可用于电催化领域。在这项研究中,镍铁钴三金属PBA(即NiFeCo(4:1)PBA纳米立方体)在镍泡沫(NF)上原位生长,随后在空气中煅烧以获得复合电极NiO / FeO X / Co 3 O 4 @NF,具有疏松的多孔中空纳米立方体形态。这种结构显着扩大了电解质和催化剂之间的接触面积。此外,这些金属氧化物之间的协同作用加快了氧释放反应(OER)动力学。塔菲尔斜率(71.25 mV dec -1)对构造电极的OER很小,远低于我们制备的双金属氧化物@NF电极。持久稳定性超过22小时。这项工作表明,通过形态和成分控制,可以有效提高设计电极的电催化性能。
更新日期:2021-01-04
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