煤炭转化2024，Vol.47Issue(4)：114-124,11.DOI:10.19726/j.cnki.ebcc.202404011
有机框架结构对NiFe-MOF析氧反应的影响
Effect of organic framework structure on NiFe-MOF for oxygen evolution reaction
摘要
Abstract
The rational design of highly active electrocatalysts for oxygen evolution reac-tions(OER)is essential for the sustainable development of clean energy and the environment.However,due to the slow kinetic process of OER with four electrons transfer,it requires a high overpotential,making the development of efficient anode catalysts a significant challenge.Metal-organic frameworks(MOF)are considered potential OER electrocatalysts due to their structural diversity and high specific surface area.Currently,NiFe bimetal materials have been found to ex-hibit excellent catalytic activity of OER.While the modulation of the activity for MOF materials mainly focuses on the design of the metal centers,and the influence of anionic organic framework on OER performance is still unclear.Therefore,aseries of carboxylate-type bimetal NiFe-MOFs with isoreticular structures were constructed using a solvothermal method to elucidate the effect of different carboxylate-type ligand lengths on their OER performance.The three different car-boxylate-type ligands were:terephthalic acid(BDC),naphthalene-2,6-dicarboxylicacid(NDC),and biphenyl-4,4'-dicarboxylic acid(BPDC).The properties,morphology and charge structure of the catalysts were analyzed by using X-ray diffraction(XRD),Raman spectroscopy,infrared spectroscopy(FTIR),scanning electron microscopy(SEM),and X-ray photoelectron spectrosco-py(XPS),followed by electrochemical testing in 1 mol/L KOH solution.The results show that NiFe-BDC only requires an overpotential of 223 mV at a current density of 10 mA/cm2 in 1 mol/L KOH,which is much lower than that of NiFe-NDC(267mV)and NiFe-BPDC(284 mV).In ad-dition,NiFe-BDC demonstrates excellent activity and stability for up to 200 h.The excellent per-formance is mainly attributed to role of organic ligands in optimizing the charge structures during the catalytic process and exhibiting abundant active centers,which collectively enhance the elec-trocatalytic performance of OER.关键词
金属有机框架/析氧反应/结构设计/配体调控/电催化剂/稳定性Key words
metal-organic framework/oxygen evolution reaction/structure design/lig-and regulation/electrocatalysts/stability分类
化学化工引用本文复制引用
钟达忠,赵陶,郝根彦,赵强..有机框架结构对NiFe-MOF析氧反应的影响[J].煤炭转化,2024,47(4):114-124,11.基金项目
国家自然科学基金项目(22308246,21975175,21878202)、中央引导地方科技发展资金项目(YDZJSX20231A015)和山西省基础研究计划项目(202203021212266). （22308246,21975175,21878202）
