Liu Sirui, Shi Yuxin, Wang Di, Zhang Qiulan, Ma Xinzhi, Yin Zhuoxun, Zhou Pengfei, Wu Lili, Zhang Mingyi
Jiangsu R&D Center of the Ecological Textile Engineering & Technology, Yancheng Polytechnic College, Yancheng 224005, PR China; Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.
Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.
J Colloid Interface Sci. 2024 Feb;655:685-692. doi: 10.1016/j.jcis.2023.11.012. Epub 2023 Nov 10.
Cobalt-based spinel oxides have excellent oxygen evolution reaction (OER) activities and are cheap to produce; however, they have limited commercial applications due to their poor electrical conductivities and weak stabilities. Herein, we soaked CoNiO nanowires in NaBH solutions, which endowed CoNiO with significant oxygen vacancy content and decorated BO motifs outside the CoNiO nanowires. X-ray photoelectron spectroscopy and in situ Raman data suggest that these evolutions improved the conductivity, hydrophilicity, and increased active sites of the spinel oxides, which synergistically boosted their overall OER performances. This improved performance made the optimized BO-covered CoNiO nanowires generate a current density of 10 mA cm when used for the OER at an overpotential of only 307 mV, maintaining excellent stability at 50 mA cm for 24 h. This study provides a facile method for designing cobalt-based spinel oxide OER catalysts.
钴基尖晶石氧化物具有优异的析氧反应（OER）活性，生产成本低廉；然而，由于其电导率较差和稳定性较弱，它们的商业应用受到限制。在此，我们将CoNiO纳米线浸泡在NaBH溶液中，这赋予了CoNiO大量的氧空位，并在CoNiO纳米线外部修饰了BO基团。X射线光电子能谱和原位拉曼数据表明，这些变化提高了尖晶石氧化物的电导率、亲水性，并增加了活性位点，从而协同提高了它们的整体OER性能。这种改进的性能使得优化后的BO包覆CoNiO纳米线在用于OER时，仅在307 mV的过电位下就能产生10 mA cm的电流密度，在50 mA cm下保持24小时的优异稳定性。这项研究为设计钴基尖晶石氧化物OER催化剂提供了一种简便的方法。
