过电位
材料科学
分解水
析氧
双功能
无定形固体
化学工程
贵金属
纳米颗粒
电极
电解
沉积(地质)
催化作用
电解水
合金
纳米技术
冶金
金属
电化学
电解质
化学
有机化学
沉积物
生物
光催化
古生物学
物理化学
工程类
作者
Yanhui Liang,Xuping Sun,Abdullah M. Asiri,Yuquan He
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2016-02-18
卷期号:27 (12): 12LT01-12LT01
被引量:85
标识
DOI:10.1088/0957-4484/27/12/12lt01
摘要
It is highly attractive, but still remains challenging, to develop noble metal-free bifunctional electrocatalysts efficient for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline media. In this letter, we describe the rapid electroless deposition of amorphous Ni-B nanoparticle film on Ni foam (Ni-B/Ni foam) by alternative dipping of Ni foam into Ni precursor and reducing solutions. This Ni-B/Ni foam acts as an efficient and durable 3D catalytic electrode for water splitting, affording 100 mA cm−2 at 360 mV overpotential for the OER and 20 mA cm−2 at 125 mV overpotential for the HER in 1.0 M KOH, and its two-electrode electrolyzer demands a cell voltage of 1.69 V to afford 15 mA cm−2 water-splitting current. Moreover, the catalyst loading can be easily tuned and this alternately dipping deposition technique works universally for other conductive substrates.
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