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Fabrication of hierarchical SrTiO3@MoS2 heterostructure nanofibers as efficient and low-cost electrocatalysts for hydrogen-evolution reactions

机译:制备分层SRTIO3 @ MOS2异质结构纳米纤维作为氢气进化反应的有效和低成本电催化剂

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摘要

The construction of low-cost, high-performance electrocatalysts instead of platinum catalysts is critical to solving the energy crisis. Here, using simple electrospinning and hydrothermal methods, new MoS2 nanosheets on SrTiO3 nanofibers (NFs) and 2D SrTiO3@MoS2 heterostructure NFs are synthesized. In addition, SrTiO3@MoS2 heterostructure NFs are compared with bare SrTiO3 NFs and MoS2 nanosheets. Importantly, the prepared SrTiO3@MoS2 heterostructure shows better hydrogen-evolution reaction performance than other MoS2-based electrocatalysts with an overpotential of 165 mV at 10 mA cm(-2), a Tafel slope of 81.41 mV dec(-1), and long-term electrochemical durability of 3000 cycles. Therefore, the present work strongly demonstrates the positive synergy between SrTiO3 NFs and layered MoS2, and also provides a strategy for preparing low-cost and high-activity water-decomposition electrocatalysts.
机译:施工低成本,高性能电催化剂代替铂催化剂对于解决能源危机至关重要。 这里,使用简单的静电纺丝和水热方法,合成SRTIO3纳米纤维(NFS)和2D SRTIO3 @ MOS2异质结构NFS上的新MOS2纳米片。 此外,将SRTIO3 @ MOS2异质结构NFS与裸SRTIO3 NFS和MOS2纳米液进行比较。 重要的是,制备的SRTIO3 @ MOS2异质结构显示出比其他基于MOS2的电催化剂更好的氢气进化反应性能,其具有10mA cm(-2)的过电位为165 mV,Tafel斜率为81.41mV(-1),长 - 电化学耐久性为3000次循环。 因此,本工作强烈地证明了SRTIO3 NFS和层状MOS2之间的正协同作用,还提供了制备低成本和高活性水分解电催化剂的策略。

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