塔菲尔方程
钐
过电位
电催化剂
分解水
金属有机骨架
析氧
双功能
催化作用
材料科学
无机化学
电化学
化学工程
化学
有机化学
物理化学
电极
光催化
吸附
工程类
作者
Muhammad Mukhtar Sirati,Shagufta Sirati,Umay Amara,Ajaz Hussain,Dilshad Hussain,Muhammad Hanif,Adnan Ali,Hafiz Muhammad Asif,Muhammad Khalid,Muhammad Tariq,Farhan Siddique,Muhammad Yaqub,Iqbal Ahmad
出处
期刊:Fuel
[Elsevier]
日期:2024-04-01
卷期号:362: 130812-130812
被引量:4
标识
DOI:10.1016/j.fuel.2023.130812
摘要
Due to ever-increasing energy demand, development of inexpensive and highly active metal-based materials such as metal–organic framework (MOF) nanoarchitectures for efficient electrocatalytic water splitting via oxygen evolution reactions (OER) and hydrogen evolution reactions (HER) has become a highly challenging task in recent years. Herein, we synthesized two different MOFs by hydrothermal method using 1,4-benzene dicarboxylic acid (1,4-BDC) and 2-amino-1,4-benzenedicarboxylic acid (2-NH2-1,4-BDC) as ligands and samarium (Sm) as the metal center. These samarium-based MOF (Sm-MOF) and amine-functionalized samarium-based MOF (NH2 functionalized Sm-MOF) worked as multifunctional catalysts for OER and HER owing to their attractive rod and hollow spherical morphology with visible pores. Among both, NH2 functionalized Sm-MOF exhibited significant HER/OER performance with low overpotential of 20.9/433 mV at 10/10 mA/cm2 and a small Tafel slope of 198/95.1 mV/dec in 1 M KOH electrolyte respectively. Moreover, its stability is maintained with 1000 cycles with a minute shift in performance. This strategy shows the novel approach to design a bifunctional electrocatalyst with improved electrochemical surface area (ECSA) of 5650/7425 cm2 for HER/OER and more efficiency for overall electrocatalytic water splitting under alkaline conditions.
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