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

Abstract

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 MoS 2 nanosheets on SrTiO 3 nanofibers (NFs) and 2D SrTiO 3 @MoS 2 heterostructure NFs are synthesized. In addition, SrTiO 3 @MoS 2 heterostructure NFs are compared with bare SrTiO 3 NFs and MoS 2 nanosheets. Importantly, the prepared SrTiO 3 @MoS 2 heterostructure shows better hydrogen-evolution reaction performance than other MoS 2 -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 SrTiO 3 NFs and layered MoS 2 , and also provides a strategy for preparing low-cost and high-activity water-decomposition electrocatalysts.

Self-assembled functional components-doped conductive polypyrrole composite hydrogels with enhanced electrochemical performances

“…Fourier transform infrared spectroscopy used molecular vibration to obtain the spectrum. [34][35][36][37][38] Infrared absorption spectrum can detect functional groups in materials, as shown in Fig. 5d.…”

Electronic modulation and interface engineering of electrospun nanomaterials‐based electrocatalysts toward water splitting

“…Another unique interface effect is usually occurring between two semiconductors, which has been attracted significant attention for the improvement of HER performance 120‐126 . For instance, Co 9 S 8 @MoS 2 core‐shell structure has been fabricated on the surface of CNFs as novel HER electrocatalyst 125 .…”

Fabrication of CS/GA/RGO/Pd composite hydrogels for highly efficient catalytic reduction of organic pollutants

“…The results of catalytic cycling experiments shows that CS/GA/RGO/Pd composite hydrogel has high catalytic performance and stability, demonstrating broad application prospects in the elds of catalysts and composite materials. [75][76][77][78][79][80][81][82][83][84][85][86] In summary, two kinds of composite hydrogels CS/GA/RGO and CS/GA/RGO/Pd were successfully prepared by self-assembly, and their morphologies and microstructures were characterized. The results show that the prepared hydrogel had porous microstructure, large specic surface area and high thermal stability.…”