Rapid Synthesis of Various Electrocatalysts on Ni Foam Using a Universal and Facile Induction Heating Method for Efficient Water Splitting

作者：Xiong, Guowei; Chen, Yuke; Zhou, Ziqian; Liu, Fan; Liu, Xiaoyu; Yang, Linjing; Liu, Qilu; Sang, Yuanhua; Liu, Hong; Zhang, Xiaoli; Jia, Jin^*; Zhou, Weijia^*

来源：Advanced Functional Materials, 2021, 31(15): 2009580.

DOI：10.1002/adfm.202009580

• electrocatalysts
• hydrogen evolution reaction
• induction heating
• rapid synthesis
• water splitting

Electrocatalytic water splitting for the production of hydrogen proves to be effective and available. In general, the thermal radiation synthesis usually involves a slow heating and cooling process. Here, a high-frequency induction heating (IH) is employed to rapidly prepare various self-supported electrocatalysts grown on Ni foam (NF) in liquid- and gas-phase within 1-3 min. The NF not only serves as an in situ heating medium, but also as a growth substrate. The as-synthesized Ni nanoparticles anchored on MoO2 nanowires supported on NF (Ni-MoO2/NF-IH) enable catalysis of hydrogen evolution reaction (HER), showing a low overpotential of -39 mV (10 mA cm(-2)) and maintaining the stability of 12 h in alkaline condition. Moreover, the NiFe layered double hydroxide (NiFe LDH/NF-IH) is also synthesized via IH and affords outstanding oxygen evolution reaction (OER) activity with an overpotential of 246 mV (10 mA cm(-2)). The Ni-MoO2/NF-IH and NiFe LDH/NF-IH are assembled to construct a two-electrode system, where a small cell voltage of approximate to 1.50 V enables a current density of 10 mA cm(-2). More importantly, this IH method is also available to rapidly synthesize other freestanding electrocatalysts on NF, such as transition metal hydroxides and metal nitrides.

• 单位
  山东大学; 郑州大学