Engineering hybrid CoMoS4/Ni3S2 nanostructures as efficient bifunctional electrocatalyst for overall water splitting
Engineering hybrid CoMoS4/Ni3S2 nanostructures as efficient bifunctional electrocatalyst for overall water splitting
复制标题
设计混合 CoMoS4/Ni3S2 纳米结构作为整体水分解的高效双功能电催化剂
DOI：
10.1016/j.jpowsour.2019.01.090
复制
发表时间：
2019-03-15
影响因子：
9.2
通讯作者：
Wang, Jinshu
中科院分区：
文献类型：
--
作者：
Hu, Peng;Jia, Zhiyuan;Wang, Jinshu
在全水裂解反应中，析氧反应是一个速率控制步骤，其反应过程复杂，动力学缓慢，因此设计具有精细结构的双功能电催化剂以改善析氧反应性能是其有效应用于全水裂解的关键。在这里，双功能CoMoS 4/Ni 3S 2纳米结构的原位合成的自模板策略，和CoMoS 4外层的形貌控制，同时实现了通过一个独特的演变从CoMoO 4纳米柱阵列到中空CoMoS 4纳米片阵列与多孔结构。得益于Ni 3S 2中间层的协同效应，所获得的电极表现出比单一CoMoS 4电极显著提高的析氧活性，而析氢活性保持良好。它与具有高活性区域的CoMoS 4外层的三维地形结构一起，为双电极系统中的整体水裂解提供了相当低的电池电压（1.568 V@10 mA cm（-2））。因此，我们的研究结果可能会打开新的机会，探索混合纳米结构作为有效的双功能电催化剂的整体水裂解。
In overall water splitting, oxygen evolution reaction is a rate-determining step due to its complex reaction processes with sluggish kinetics, so design of bifunctional electrocatalyst with elaborated structure to improve the oxygen evolution reaction performance is critical to their efficient application in overall water splitting. Here bifunctional CoMoS4/Ni3S2 nanostructures are in situ synthesized by a self-templating strategy, and the morphology control of the CoMoS4 outlayer is simultaneously achieved through a unique evolution from CoMoO4 nanocolumns array to hollow CoMoS4 nanosheets array with porous structure. Benefited from the synergistic effect of Ni3S2 interlayer, as obtained electrode exhibits greatly enhanced oxygen evolution activity than single CoMoS4 electrode with well-preserved hydrogen evolution activity. It, together with the three-dimensional topographic structure of CoMoS4 outlayer with high active areas, offers a rather low cell voltage (1.568 V@ 10 mA cm(-2)) for overall water splitting in a two-electrode system. Accordingly, our results may open new opportunities to explore hybrid nanostructures as efficient bifunctional electrocatalyst for overall water splitting.