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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >The controlled construction of a ternary hybrid of monodisperse Ni3S4 nanorods/graphitic C3N4 nanosheets/nitrogen-doped graphene in van der Waals heterojunctions as a highly efficient electrocatalyst for overall water splitting and a promising anode material for sodium-ion batteries
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The controlled construction of a ternary hybrid of monodisperse Ni3S4 nanorods/graphitic C3N4 nanosheets/nitrogen-doped graphene in van der Waals heterojunctions as a highly efficient electrocatalyst for overall water splitting and a promising anode material for sodium-ion batteries

机译：在范德华杂交中的单分散Ni3s4纳米棒/石墨C3N4纳米晶片/氮掺杂石墨烯的受控结构作为高效的电催化剂，用于整个水分裂和用于钠离子电池的有希望的阳极材料

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As a kind of novel multi-functional nanocomposite, a ternary hybrid of monodisperse Ni3S4 nanorods/graphitic C3N4 nanosheets/nitrogen-doped graphene with heterostructured architecture is controllably constructed for the first time, illustrating great potential for overall water splitting and the fabrication of sodium-ion batteries. Intensive investigations revealed that the ternary hybrid with robust and intertwined nanostructures possesses shorter diffusion pathways, smaller diffusion resistance and faster transfer speeds of electrons and ions, which could expedite the transport of electrolyte to flood and interact with reaction sites, dynamically and thermodynamically. Notably, the active Ni3S4 nanorods within the unique integrated ternary hybrid embedded in graphitic C3N4 nanosheets over a conducting substrate of nitrogen-doped graphene could strongly avoid agglomeration, abscission, anisotropic volume expansion and irreversible mechanical failure, even during extreme electrochemical reactions. Owing to the integrated effect, the ternary hybrid delivers excellent electrochemical performance with long-term stability during water splitting and cycling durability when used in sodium-ion batteries. In particular, a low onset potential of 40 mV (vs. RHE, J = -1.5 mA cm(-2)) is observed in the HER process, and the applied potentials are also as small as 1.47 V (vs. RHE) and 1.51 V for the OER and overall water splitting, respectively, at 10 mA cm(-2) under the same alkaline conditions. As for sodium-ion batteries, the ternary hybrid possesses an advanced specific capacity of similar to 670 mA h g(-1) at 100 mA g(-1) with particularly excellent rate capabilities and it could even work at a high current density.
机译：作为一种新型多官能的纳米复合材料的，单分散的纳米棒Ni3S4 /石墨纳米片C3N4 /氮掺杂的石墨烯与异质结构被可控地构造成用于在第一时间，示出了用于整体水分解的巨大潜力和的制造钠的三元混合离子电池。深入研究发现，具有强大的和交织的纳米结构的三系杂交具有更短的扩散路径，更小的扩散电阻和电子和离子的更快的传输速度，这可能加速电解质的输送到洪水和相互作用与反应位点，和动态热力学。值得注意的是，在氮掺杂的石墨烯的导电衬底中嵌入的石墨纳米片C3N4独特集成三元杂交内的活性Ni3S4纳米棒可以强烈避免结块，脱落，各向异性体积膨胀和不可逆的机械故障，甚至在极端的电化学反应。由于集成效果，三元杂交提供水分解和钠离子电池中使用时循环耐久性期间与长期稳定性优异的电化学性能。特别是，40 mV的低开始电位（相对于RHE，J = -1.5毫安厘米（-2））在HER处理观察到的，并且所施加的电势也小到1.47 V（vs.RHE）下和1.51 V输出用于OER和整体水分解，分别在10mA厘米（-2）相同在碱性条件下。作为钠离子电池，三元混合具有在100mA克（-1），特别优异的速率能力的类似670毫安ħ克（-1）的先进比容量和它可能即使在高电流密度下工作。

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