Institute for Energy Research, School of Material Science and Engineering, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P.R. China.
College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes (Ministry of Education), Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan, 250014, P.R. China.
Chem Asian J. 2019 Feb 1;14(3):480-485. doi: 10.1002/asia.201801710. Epub 2019 Jan 16.
Developing highly active, stable and robust electrocatalysts based on earth-abundant elements for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is important for many renewable energy conversion processes. Herein, Ni Co O nanoneedle arrays grown on 3D porous nickel foam (NF) was synthesized as a bifunctional electrocatalyst with OER and HER activity for full water splitting. Benefiting from the advantageous structure, the composite exhibits superior OER activity with an overpotential of 320 mV achieving the current density of 10 mA cm . An exceptional HER activity is also acquired with an overpotential of 170 mV at the current density of 10 mA cm . Furthermore, the catalyst also shows the superior activity and stability for 20 h when used in the overall water splitting cell. Thus, the hierarchical 3D structure composed of the 1D nanoneedle structure in Ni Co O /NF represents an avenue to design and develop highly active and bifunctional electrocatalysts for promising energy conversion.
基于丰富元素开发高效、稳定、坚固的电催化剂对于许多可再生能源转化过程而言非常重要，例如氧气析出反应（OER）和氢气析出反应（HER）。在此，我们合成了一种基于三维多孔镍泡沫（NF）生长的 NiCoO 纳米针阵列，该纳米针阵列作为一种具有 OER 和 HER 活性的双功能电催化剂，可用于全水分解。得益于有利的结构，该复合材料表现出优异的 OER 活性，过电势为 320 mV 时电流密度达到 10 mA cm 。同时，该催化剂在电流密度为 10 mA cm 时还表现出优异的 HER 活性，过电势为 170 mV。此外，当用于整体水分解电池时，该催化剂在 20 小时内也表现出优异的活性和稳定性。因此，由 1D 纳米针结构组成的分级 3D 结构为设计和开发高效、双功能电催化剂提供了一条有前景的途径，用于能源转化。
