Nickel-iron diselenide hollow nanoparticles with strongly hydrophilic surface for enhanced oxygen evolution reaction activity
Nickel-iron diselenide hollow nanoparticles with strongly hydrophilic surface for enhanced oxygen evolution reaction activity
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具有强亲水表面的二硒化镍铁中空纳米粒子,可增强析氧反应活性
DOI:
10.1016/j.electacta.2018.08.039
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发表时间:
2018-10
影响因子:
6.6
通讯作者:
Wang Chundong
中科院分区:
文献类型:
--
作者:
Lv Lin;Li Zhishan;Ruan Yunjun;Chang Yaoxing;Ao Xiang;Li Jian-Gang;Yang Zhaoxi;Wang Chundong
It is highly desired while remains challenging to explore stable, earth-abundant, low-cost, and high-efficient electrocatalysts towards eco-friendly utilization of green energy. In this study, we report a one-pot hydrothermal synthesis of polyvinyl-pyrrolidone (PVP)-decorated nickel-iron diselenide hollow nanoparticles with strongly hydrophilic surface, the hollow architecture of which could be assigned to the Kirkendall effect. As the lactam groups in PVP are strongly polar and incline to interact with water molecules, the surface wettability of the electrocatalyst was effectively improved after PVP was introduced. Compared with the pristine one, such PVP decorated nickel-iron diselenide hollow nanoparticles demands only a low overpotential of 255 mV to drive a geometrical current density of 10 mA cm−2in 1 M KOH aqueous solution. Moreover, this PVP involved electrocatalyst yields a low Tafel slope of 56 mV dec−1and possesses remarkably long-term durability. This surface engineering insight provides an indication for fabrication of high-efficient OER electrocatalysts.
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影响因子:
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通讯作者:
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影响因子:
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