State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China; Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
J Colloid Interface Sci. 2019 Feb 1;535:75-83. doi: 10.1016/j.jcis.2018.09.063. Epub 2018 Sep 25.
Development of highly-active and noble-metal-free electrocatalysts for hydrogen evolution reactions is a challenge, and optimizing the structure and the composition of the relative materials is critical to obtain the high-quality catalysts. Ni-based compounds are being explored as noble-metal-free electrocatalysts in hydrogen evolution reactions but the Ni-based needs to be modified effectively. In this work, we co-electrodeposited Ni nanoparticles, hydrophilic graphene and graphene oxide layers on Ni foam to synthesize Ni-HG-rGO/NF catalysts. It was presented a Datura-like shape allowing for high performance with current densities of -10 and -100 mA cm for HER at overpotentials of -50 and -132 mV, a low Tafel slope of -48 mV dec and excellent long-term stability in 1.0 M NaOH solution. These results demonstrate that the Ni-HG-rGO/NF electrode can be a competitive electrode materials for HER in alkaline conditions.
开发高效且不含贵金属的电催化剂用于析氢反应是一个挑战，优化相关材料的结构和组成对于获得高质量的催化剂至关重要。镍基化合物作为析氢反应中的无贵金属电催化剂正在被探索，但镍基需要被有效修饰。在这项工作中，我们在泡沫镍上共电沉积镍纳米颗粒、亲水性石墨烯和氧化石墨烯层，以合成 Ni-HG-rGO/NF 催化剂。它呈现出类似于曼陀罗的形状，在碱性条件下具有优异的 HER 性能，在过电势为-50 和-132 mV 时，电流密度分别为-10 和-100 mA cm-2，塔菲尔斜率低至-48 mV dec，并且在 1.0 M NaOH 溶液中具有出色的长期稳定性。这些结果表明，Ni-HG-rGO/NF 电极可以成为碱性条件下析氢反应的一种有竞争力的电极材料。
