Spheres: Controllable Ni3S2/MoS2 hollow sphere structures have been in-situ grown with the support of non-ionic surfactant micelle soft templates on Ni foam by a facile one-step hydrothermal method. The as-produced Ni3S2/MoS2 porous hollow spheres fabricated from P123 template exhibited low overpotentials of 314 mV and 337 mV at 50 mA cm−2 and 100 mA cm−2 with a Tafel slope of 57 mV dec−1 and an excellent long-term stability.
The hollow sphere structure has attracted various attention in the catalytic field due to its high specific surface. The good dispersion and morphology of hollow spheres are important to provide high active sites. It is a big challenge to control the morphology and distribution of the active materials during synthesis. Serious deformation and uneven distribution of the spheres were usually obtained due to inappropriate templates. A facile one-step hydrothermal method using micelles of triblock copolymer surfactant P123 was adopted to in-situ grow Ni3S2/MoS2 porous hollow spheres on Ni foam with uniform distribution. The as-produced Ni3S2/MoS2 porous hollow spheres have been demonstrated to have excellent oxygen evolution reaction catalytic performance as integrated electrodes. Low overpotentials of 314 mV and 337 mV have been achieved at current densities of 50 mA cm−2 and 100 mA cm−2 with a Tafel slope of 57 mV dec−1 and an excellent long-term stability, which is better than other Ni-base material.Zum Volltext