Here we introduce a new strategy for synthesis of layered double hydroxide CoAl-LDH nanosheets and N-doped graphene composite via Successive Ionic Layer Deposition (SILD) method as well as the study of their efficiency as electrocatalytic materials for hydrogen evolution reaction in alkaline media. The synthesis nanosheets were characterized by SEM, EDX, XRD, Raman, XPS and FTIR methods. Electrocatalytic characteristics of electrodes based on nickel foil and nanosheets synthesized via SILD method (50 cycles) have been studied in 1 M KOH solution by using techniques of polarization curves, cyclic voltammetry and chronoamperometry. The values of excess voltage at the current density of 10 mА/cm² for CoAl-LDH and N-doped graphene nanocomposite were −415 and −365 mV, and Tafel slope was 53 mV/dec and 48 mV/dec, respectively. We report that CoAl-LDH composite containing N-doped graphene shows better electrocatalytic characteristics than CoAl-LDH without graphene and has high cyclic stability.

在这里，我们介绍了一种通过连续离子层沉积（SILD）方法合成层状双氢氧化物CoAl-LDH纳米片和N掺杂石墨烯复合材料的新策略，以及它们在碱性介质中作为氢分解反应的电催化材料的效率的研究。通过SEM，EDX，XRD，拉曼，XPS和FTIR方法对合成的纳米片进行了表征。 利用极化曲线，循环伏安法和计时电流法，研究了在1 M KOH溶液中通过SILD方法（50个循环）合成的基于镍箔和纳米片的电极的电催化特性。CoAl-LDH和N掺杂石墨烯纳米复合材料在电流密度为10mА/ cm ^2时的过电压值为-415和-365 mV，Tafel斜率为53 mV / dec和48  mV / dec。我们报道，含有N掺杂石墨烯的CoAl-LDH复合材料比不含石墨烯的CoAl-LDH具有更好的电催化特性，并且具有较高的循环稳定性。