乙醇
电解质
直接乙醇燃料电池
材料科学
化学工程
纳米晶
碳纤维
多孔性
纳米技术
化学
电极
复合数
有机化学
复合材料
物理化学
工程类
作者
Jimodo J. Ogada,Tobechukwu J. Ehirim,Adewale K. Ipadeola,Aderemi B. Haruna,Patrick V. Mwonga,Aboubakr M. Abdullah,Xiaoyu Yang,Kamel Eid,Daniel Wamwangi,Kenneth I. Ozoemena
出处
期刊:ACS omega
[American Chemical Society]
日期:2024-02-09
标识
DOI:10.1021/acsomega.3c04427
摘要
Porous Pd-based electrocatalysts are promising materials for alkaline direct ethanol fuel cells (ADEFCs) and ethanol sensors in the development of renewable energy and point-of-contact ethanol sensor test kits for drunk drivers. However, experimental and theoretical investigations of the interfacial interaction among Pd nanocrystals on supports (i.e., carbon black (CB), onion-like carbon (OLC), and CeO2/OLC) toward ADEFC and ethanol sensors are not yet reported. This is based on the preparation of Pd-CeO2/OLC nanocrystals by the sol-gel and impregnation methods. Evidently, the porous Pd-CeO2/OLC significantly increased membrane-free micro-3D-printed ADEFC performance with a high peak power density (Pmax = 27.15 mW cm-2) that is 1.38- and 7.58-times those of Pd/OLC (19.72 mW cm-2) and Pd/CB (3.59 mW cm-2), besides its excellent stability for 48 h. This is due to the excellent interfacial interaction among Pd, CeO2, and OLC, evidenced by density functional theory (DFT) simulations that showed a modulated Pd d-band center and facile active oxygenated species formation by the CeO2 needed for ethanol fuel cells. Similarly, Pd-CeO2/OLC gives excellent sensitivity (0.00024 mA mM-1) and limit of detection (LoD = 8.7 mM) for ethanol sensing and satisfactory recoveries (89-108%) in commercial alcoholic beverages (i.e., human serum, Amstel beer, and Nederberg Wine). This study shows the excellent possibility of utilizing Pd-CeO2/OLC for future applications in fuel cells and alcohol sensors.
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