Assembling Nickel Oxide Nanoparticles into Porous Polyhedra: Highly Active Electrocatalysts for Alkaline Water Oxidation,ChemistrySelect

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Assembling Nickel Oxide Nanoparticles into Porous Polyhedra: Highly Active Electrocatalysts for Alkaline Water Oxidation
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-07-01 , DOI: 10.1002/slct.202001471
Jian Zhou ₁ , Yonghong Dong ₂ , Yongzhi Ma ₁ , Tiezhu Zhang ₃

Affiliation

Nickel oxide (NiO) with high surface area was widely investigated in electrochemical applications. However, its use was largely confined to morphologies of particles and thin films. Here, we assembled NiO nanoparticles into mesoporous polyhedra with better active‐site exposure for oxygen evolution reaction (OER) catalysis. It needs an overpotential of 280 mV to drive 10 mA cm⁻² in 1.0 M KOH, outperforming many reported transition‐metal oxides. Its activity can be mantained for at least 20 hours. High surface area of mesoporous polyhedra affirmed by Brunner‐Emmet‐Teller measurement contributes to the outstanding catalytic activity. Using one of the most abundant metal elements to constuct high‐performance OER catalysts will provide great convenience for industrial applications.

中文翻译：

将氧化镍纳米粒子组装到多孔多面体中：用于碱性水氧化的高活性电催化剂

高表面积的氧化镍（NiO）在电化学应用中得到了广泛的研究。然而，其使用主要限于颗粒和薄膜的形态。在这里，我们将NiO纳米颗粒组装到具有更好活性位暴露的介孔多面体中，以进行氧释放反应（OER）催化。它需要280 mV的超电势才能在1.0 M KOH中驱动10 mA cm ^-2，优于许多报道的过渡金属氧化物。它的活动可以维持至少20小时。Brunner-Emmet-Teller测量证实了介孔多面体的高表面积有助于其出色的催化活性。使用最丰富的金属元素之一来构造高性能OER催化剂将为工业应用提供极大的便利。

更新日期：2020-07-01

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