Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong, China.
Chem Commun (Camb). 2018 May 10;54(39):4987-4990. doi: 10.1039/c8cc01002a.
Here, we report the in situ electrochemical conversion of NiCr2O4 on Ni foam prepared using a hydrothermal strategy to give ultra-thin wrinkled NiOOH-NiCr2O4 amorphous-crystalline nanosheets on Ni foam (NiOOH-NiCr2O4/NF) via anode oxidation in 1.0 M KOH. Owing to the coordination of NiCr2O4 and NiOOH, NiOOH-NiCr2O4/NF shows superior catalytic activity toward the oxygen evolution reaction (OER) with the demand of overpotential as low as 271 mV to drive a geometrical current density of 20 mA cm-2 under alkaline conditions. Notably, it also displays strong long-term electrochemical durability for at least 30 h.
在这里，我们报告了一种原位电化学转化方法，即将通过水热策略在泡沫镍上制备的 NiCr2O4 在 1.0 M KOH 中通过阳极氧化转化为超薄褶皱的 NiOOH-NiCr2O4 非晶-晶态纳米片在泡沫镍上（NiOOH-NiCr2O4/NF）。由于 NiCr2O4 和 NiOOH 的配位，NiOOH-NiCr2O4/NF 对析氧反应（OER）表现出优异的催化活性，在碱性条件下仅需 271 mV 的过电势即可驱动 20 mA cm-2 的几何电流密度。值得注意的是，它还表现出很强的长期电化学耐久性，至少 30 小时。
