期刊
NANO ENERGY
卷 48, 期 -, 页码 73-80出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2018.03.034
关键词
Hollow nanoarrays; Binder-free; Metal phosphide; Electrochemical electrocatalyst; 2D metal-organic framework
类别
资金
- Ministry of Education (Singapore) at the National University of Singapore [MOE2015-T2-2-094]
Earth-abundant, efficient and durable electrocatalysts for water splitting are vitally important for a sustainable energy system. Here we report the rational design of hollow Mo-doped CoP (Mo-CoP) nanoarrays, which simultaneously combine electronic structure modification through doping with a high density of reaction sites through nanostructuring. With this strategy the Mo-CoP arrays give significantly improved hydrogen evolution reaction (HER) performance, and also, when in situ transformed into Mo-doped CoOOH (Mo-CoOOH) arrays, excellent activity towards the oxygen evolution reaction (OER) is obtained. The origin of the improvement is determined by atomic-resolution imaging combined with density functional theory (DFT). An electrolyzer using Mo-CoP and Mo-CoOOH can be powered by a single AA battery (similar to 1.5 V), and maintains a stable water-splitting current for 20 h, superior to most reported electrocatalysts in alkaline media, offering great promise for practical applications.
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