Hollow and porous NiCo2O4 nanospheres for enhanced methanol oxidation reaction and oxygen reduction reaction by oxygen vacancies engineering
Hollow and porous NiCo2O4 nanospheres for enhanced methanol oxidation reaction and oxygen reduction reaction by oxygen vacancies engineering
复制标题
空心多孔NiCo2O4纳米球通过氧空位工程增强甲醇氧化反应和氧还原反应
DOI：
10.1016/j.apcatb.2021.120065
复制
发表时间：
2021-03-09
影响因子：
22.1
通讯作者：
Fan, Weibin
中科院分区：
文献类型：
--
作者：
Chen, Shuai;Huang, Dongmei;Fan, Weibin
合理设计催化剂的形貌和调节催化剂的活性中心是提高催化剂性能的关键。本文采用无模板溶剂热法成功制备了一系列具有多级孔结构和丰富氧空位的可控空心NiCo 2 O 4纳米粒子，并对其进行了热处理。所制备的空心多孔NiCo 2 O 4具有氧空位缺陷依赖的活性，其中NiCo 2 O 4 -450-Vo在甲醇氧化反应（莫尔）和碱性溶液中四电子反应途径的氧还原反应（ORR）中表现出优异的性能。该工作为设计具有可调氧空位缺陷的空心多孔NiCo 2 O 4纳米球，加速燃料电池等领域的各种电化学反应奠定了基础。
The rational designing morphology and regulating active sites of catalyst is crucial to promoting catalytic performances. Herein, a series of controllable hollow NiCo2O4 nanoparticles with interconnected hierarchically porous structure and abundant oxygen vacancies were successfully constructed by a simple template-free solvothermal method and followed by heat treatment. The obtained hollow and porous NiCo2O4 exhibit interesting oxygen vacancies (Vo) defect-dependent activity, where the NiCo2O4-450-Vo show the outstanding performance in the methanol oxidation reaction (MOR) as well as the oxygen reduction reaction (ORR) with four electron reaction pathway in alkaline solution. This work may pave a facile pathway to design the hollow and porous NiCo2O4 nanospheres with the adjustable oxygen vacancies defect to accelerate various electrochemical reactions in fuel cells and other applications.