Accelerated Hydrogen Evolution Kinetics on NiFe-Layered Double Hydroxide Electrocatalysts by Tailoring Water Dissociation Active Sites
Chen G, Wang T, Zhang J, Liu P, Sun H, Zhuang X, Chen M, Feng X (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 30
Article Number: 1706279
Journal Issue: 10
Abstract
Owing to its earth abundance, low kinetic overpotential, and superior stability, NiFe-layered double hydroxide (NiFe-LDH) has emerged as a promising electrocatalyst for catalyzing water splitting, especially oxygen evolution reaction (OER), in alkaline solutions. Unfortunately, as a result of extremely sluggish water dissociation kinetics (Volmer step), hydrogen evolution reaction (HER) activity of the NiFe-LDH is rather poor in alkaline environment. Here a novel strategy is demonstrated for substantially accelerating the hydrogen evolution kinetics of the NiFe-LDH by partially substituting Fe atoms with Ru. In a 1 m KOH solution, the as-synthesized Ru-doped NiFe-LDH nanosheets (NiFeRu-LDH) exhibit excellent HER performance with an overpotential of 29 mV at 10 mA cm−2, which is much lower than those of noble metal Pt/C and reported electrocatalysts. Both experimental and theoretical results reveal that the introduction of Ru atoms into NiFe-LDH can efficiently reduce energy barrier of the Volmer step, eventually accelerating its HER kinetics. Benefitting from its outstanding HER activity and remained excellent OER activity, the NiFeRu-LDH steadily drives an alkaline electrolyzer with a current density of 10 mA cm−2 at a cell voltage of 1.52 V, which is much lower than the values for Pt/C–Ir/C couple and state-of-the-art overall water-splitting electrocatalysts.
Involved external institutions
Technische Universität Dresden
Germany (DE)
Université Claude Bernard Lyon 1 (UCB)
France (FR)
Shanghai Jiao Tong University / 上海交通大学
China (CN)
Germany (DE)
Université Claude Bernard Lyon 1 (UCB)
France (FR)
Shanghai Jiao Tong University / 上海交通大学
China (CN)
How to cite
APA:
Chen, G., Wang, T., Zhang, J., Liu, P., Sun, H., Zhuang, X.,... Feng, X. (2018). Accelerated Hydrogen Evolution Kinetics on NiFe-Layered Double Hydroxide Electrocatalysts by Tailoring Water Dissociation Active Sites. Advanced Materials, 30(10). https://doi.org/10.1002/adma.201706279
MLA:
Chen, Guangbo, et al. "Accelerated Hydrogen Evolution Kinetics on NiFe-Layered Double Hydroxide Electrocatalysts by Tailoring Water Dissociation Active Sites." Advanced Materials 30.10 (2018).
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