Design of 3D Hollow Porous Heterogeneous Nickel-Cobalt Phosphides for Synergistically Enhancing Catalytic Performance for Electrooxidation of Methanol
Design of 3D Hollow Porous Heterogeneous Nickel-Cobalt Phosphides for Synergistically Enhancing Catalytic Performance for Electrooxidation of Methanol
复制标题
协同增强甲醇电氧化催化性能的3D中空多孔异质镍钴磷化物设计
DOI：
10.1021/acsami.0c08912
复制
发表时间：
2020-08-05
影响因子：
9.5
通讯作者：
Fan, Weibin
中科院分区：
文献类型：
--
作者：
Chen, Shuai;Yang, Xiaobo;Fan, Weibin
不同组分之间的协同效应以及催化纳米材料的结构和形态控制在电催化领域引起了相当大的研究兴趣，因为使用具有所需结构、形态和化学组成的催化纳米材料的合理设计是提高催化性能的有效策略。通过改变原料中Ni/Co的原子比，采用无模板溶剂热法合成了一系列具有三维中空多孔三元多组分异质结构的样品，并对其形成机理进行了研究。通过组成和结构上的优势，优化的Ni 1Co 2 Px（NiCoP/CoP/CoP 2）纳米粒子显示出非常高的质量活性（436.9 mA mg（-1））和面积比活性（155 mA cm），以及在碱性溶液中对甲醇电氧化反应（莫尔）的显著耐久性。该催化剂的催化活性优于大多数已报道的Ni/Co基非贵金属催化剂。特别地，观察到对莫尔比的多组分协同效应。本研究不仅为三维中空多孔多组分复合纳米材料的制备提供了一种简单的方法，而且为研究纳米材料的多孔结构、化学组成和催化活性在甲醇电催化氧化中的协同作用提供了新的思路。
The synergistic effect among different components and the structural and morphological control of catalytic nanomaterials have attracted considerable research interest in the field of electrocatalysis, as using a rational design of the catalytic nanomaterials with the desired structure, morphology, and chemical compositions is an effective strategy for enhancing catalytic performance. Here, by changing the Ni/Co atomic ratio of raw materials, a series of samples with a three-dimensional (3D) hollow porous ternary multicomponent heterostructure has been successfully synthesized via a facile template-free solvothermal approach and subsequently annealing and phosphating treatments, and its formation mechanism is also investigated. By virtue of compositional and structural advantages, the optimized Ni1Co2Px (NiCoP/CoP/CoP2) nanoparticles show very high mass activity (436.9 mA mg(-1)) and area-specific activity (155 mA cm as well as remarkable durability toward the methanol electrooxidation reaction (MOR) in alkaline solution. This catalytic activity is better than those of most of reported Ni/Co-based nonprecious metal catalysts. Particularly, a multicomponent synergistic effect on the MOR was observed. The present study not only provides a simple method for the fabrication of 3D hollow porous multicomponent composite nanomaterials, but also gives insights into the synergistic effect among the porous structure, chemical compositions, and catalytic activity of nanomaterials in the electrocatalytic oxidation of methanol.