材料科学与工程学报2024，Vol.42Issue(3)：379-386,8.DOI:10.14136/j.cnki.issn1673-2812.2024.03.004
蒲公英花球状NiCo2O4/碳量子点双功能电催化剂的制备与性能
Preparation and Performance of Dandelion-shaped NiCo2O4/Carbon Quantum Dot Composites for Bifunctional Electrocatalysts
摘要
Abstract
In this paper,using nickel cobalt oxide(NiCo2O4,NCO)and carbon quantum dots(CQDs),dandelion-shaped structures of NiCo2O4-CQDs(NCO-CQDs)composite bifunctional catalysts were prepared by the hydrothermal method and calcination.The microstructures of NCO-CQDs composites were studied by scanning electron microscopy(SEM),transmission electron microscopy(TEM)and X-ray diffraction(XRD).NCO-CQDs composites were composed of the stacked NCO nanorods and CQDs particles formed into dandelion flower spherical composite.In order to increase the oxygen vacancy of NCO-CQDs composite and improve the electrochemical performances,the NCO-CQDs composites were calcined in air to obtain excellent performances.The half wave potential reached 0.752 V during ORR.After 20000 seconds,NCO-CQDs composites maintained 92.2%of its initial current density,higher than that of Pt/C sample(68.6%),showing excellent stability.For OER,under the current density test of 10 mA/cm2,NCO-CQDs-air sample presented an onset potential of 1.874 V and a Tafel slope of 100.9 mV/dec,which is superior to Pt/C(2.007 V,312.9 mV/dec)and equivalent to IrO2(1.794 V,44.8 mV/dec).关键词
NiCo2O4/碳量子点/双功能催化剂/氧还原反应/氧析出反应Key words
NiCo2O4/CQDs/Bifunctional catalyst/ORR/OER分类
化学化工引用本文复制引用
杜瓌,刘冬澳,王俞晴,于沺沺,吉莹,薛裕华,李生娟..蒲公英花球状NiCo2O4/碳量子点双功能电催化剂的制备与性能[J].材料科学与工程学报,2024,42(3):379-386,8.基金项目
上海市科学技术委员会地方高校能力建设资助项目(20060502200) （20060502200）
上海市中央引导地方科技发展基金资助项目(YDZX20223100003005) （YDZX20223100003005）
