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Datura-like Ni-HG-rGO as highly efficient electrocatalyst for hydrogen evolution reaction in alkaline conditions
- Du, Jing, Wang, Lixin, Bai, Lei, Dang, Shijia, Su, Li, Qin, Xiujuan, Shao, Guangjie
- Journal of colloid and interface science 2019 v.535 pp. 75-83
- catalysts, electrodes, foams, graphene, graphene oxide, hydrogen production, hydrophilicity, nanoparticles, nickel, sodium hydroxide
- 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−2 for HER at overpotentials of −50 and −132 mV, a low Tafel slope of −48 mV dec−1 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.