A facile synthesis of CeO2 from the GO@Ce-MOF precursor and its efficient performance in the oxygen evolution reaction

被引:16
作者
Ahmed Malik, Wasif Mahmood [1 ,2 ]
Afaq, Sheereen [1 ]
Mahmood, Azhar [3 ]
Niu, Li [3 ]
Yousaf Ur Rehman, Muhammad [1 ]
Ibrahim, Muhammad [4 ]
Mohyuddin, Abrar [2 ]
Qureshi, Ashfaq Mahmood [5 ]
Ashiq, Muhammad Naeem [1 ]
Chughtai, Adeel Hussain [1 ]
机构
[1] Bahauddin Zakariya Univ, Inst Chem Sci, Multan, Pakistan
[2] Emerson Univ, Dept Chem, Multan, Pakistan
[3] Guangzhou Univ, Ctr Adv Analyt Sci, Sch Chem & Chem Engn, Guangzhou Key Lab Sensing Mat & Devices, Guangzhou, Peoples R China
[4] Bahauddin Zakariya Univ, Dept Biochem, Multan, Pakistan
[5] Govt Sadiq Coll Women Univ, Dept Chem, Bahawalpur, Pakistan
来源
FRONTIERS IN CHEMISTRY | 2022年 / 10卷
关键词
cerium (3+); MOF (metal-organic framework); GO composites; oxygen evolution reaction; water splitting; METAL-ORGANIC-FRAMEWORK; GRAPHENE OXIDE; HYDROGEN EVOLUTION; CATALYTIC-ACTIVITY; CARBON; NANOPARTICLES; ADSORPTION; ENERGY; COMPOSITES; MEMBRANE;
D O I
10.3389/fchem.2022.996560
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Electrochemical water splitting has enticed fascinating consideration as a key conduit for the advancement of renewable energy systems. Fabricating adequate electrocatalysts for water splitting is fervently preferred to curtail their overpotentials and hasten practical utilizations. In this work, a series of Ce-MOF, GO@Ce-MOF, calcinated Ce-MOF, and calcinated GO@Ce-MOF were synthesized and used as high-proficient electrocatalysts for the oxygen evolution reaction. The physicochemical characteristics of the prepared samples were measured by diverse analytical techniques including SEM, HRTEM, FTIR, BET, XPS, XRD, and EDX. All materials underwent cyclic voltammetry tests and were evaluated by electrochemical impedance spectroscopy and oxygen evolution reaction. Ce-MOF, GO@Ce-MOF, calcinated Ce-MOF, and calcinated GO@Ce-MOF have remarkable properties such as enhanced specific surface area, improved catalytic performance, and outstanding permanency in the alkaline solution (KOH). These factors upsurge ECSA and intensify the OER performance of the prepared materials. More exposed surface active-sites present in calcinated GO@Ce-MOF could be the logic for superior electrocatalytic activity. Chronoamperometry of the catalyst for 15 & DEG;h divulges long-term stability of Ce-MOF during OER. Impedance measurements indicate higher conductivity of synthesized catalysts, facilitating the charge transfer reaction during electrochemical water splitting. This study will open up a new itinerary for conspiring highly ordered MOF-based surface active resources for distinct electrochemical energy applications.
引用
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页数:17
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