1. School of Material and Chemical Engineering, Bengbu University, Bengbu 233030, China; 2. Anhui Provincial Engineering Laboratory of Silicon-Based Advanced Materials, Bengbu 233030, China; 3. College of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, China
Abstract: A series of iron-based metal organic frameworks (MOFs) are synthesized by using ferric trichloride as iron source and different dicarboxylic acids as ligands.The samples' structure and morphology are systematically investigated by means of XRD,SEM and FT-IR.Electrochemical tests indicate that Fe-based MOFs constructed with different dicarboxylic acid ligands have different oxygen evolution performances.Compared with other ligands,the MOFs constructed with fumaric acid as ligand exhibit excellent oxygen evolution activity,which can achieve a current density of 10 mA·cm-2 and 100 mA·cm-2 with only 255 mV and 302 mV of potentials,respectively in 1 mol·L-1 KOH electrolyte.The corresponding Tafel slope is 28.3 mV·dec-1.In addition,this MOFs catalyst exhibits excellent catalytic stability.
[1] Ifkovits Z P,Evans J M,Meier M C,et al .Decoupled electrochemical water-splitting systems:A review and perspective[J].Energy & Environmental Science,2021,14(9):4740-4759. [2] Xu K,Zhu Z,Guo W,et al .Cerium oxide modified iridium nanorods for highly efficient electrochemical water splitting[J].Chemical Communications,2021,57(70):8798-8801. [3] Zhang K,Zou R.Advanced transition metal-based OER electrocatalysts:Current status,opportunities,and challenges[J].Small,2021,17(37):2100129. [4] Gao J,Tao H,Liu B.Progress of nonprecious-metal-based electrocatalysts for oxygen evolution in acidic media[J].Advanced Materials,2021,33(31):2003786. [5] Zhao C X,Liu J N,Wang J,et al .Recent advances of noble-metal-free bifunctional oxygen reduction and evolution electrocatalysts[J].Chemical Society Reviews,2021,50(13):7745-7778. [6] Zhou X,Jin H,Xia B Y,et al .Molecular cleavage of metal-organic frameworks and application to energy storage and conversion[J].Advanced Materials,2021,33(51):2104341. [7] Ma J,Bai X,He W,et al .Amorphous FeNi-bimetallic infinite coordination polymers as advanced electrocatalysts for the oxygen evolution reaction[J].Chemical Communications,2019,55(83):12567-12570. [8] Serre C,Mellot-Draznieks C,Surblé S,et al .Role of solvent-host interactions that lead to very large swelling of hybrid frameworks[J].Science,2007,315(5820):1828-1831. [9] Chalati T,Horcajada P,Gref R,et al .Optimisation of the synthesis of MOF nanoparticles made of flexible porous iron fumarate MIL-88A[J].Journal of Materials Chemistry,2011,21(7):2220-2227. [10] Wang L,Zhang Y,Li X,et al .The MIL-88A-derived Fe3O4-carbon hierarchical nanocomposites for electrochemical sensing[J].Scientific Reports,2015,5:14341. [11] Qian Q,Li Y,Liu Y,et al .Ambient fast synthesis and active sites deciphering of hierarchical foam-like trimetal-organic framework nanostructures as a platform for highly efficient oxygen evolution electrocatalysis[J].Advanced Materials,2019,31(23):1901139. [12] Lin H W,Raja D S,Chuah X F,et al .Bi-metallic MOFs possessing hierarchical synergistic effects as high performance electrocatalysts for overall water splitting at high current densities[J].Applied Catalysis B:Environmental,2019,258(5):118023. [13] Tran P K L,Tran D T,Malhotra D,et al .Highly effective freshwater and seawater electrolysis enabled by atomic Rh-modulated Co-CoO lateral heterostructures[J].Small,2021,17(50):2103826. [14] Wang Q,Xu H,Qian X,et al .Successive anion/cation exchange enables the fabrication of hollow CuCo2S4 nanorods for advanced oxygen evolution reaction electrocatalysis[J].Inorganic Chemistry,2022,61(7):3176-3185. [15] Zhou Y,Wang Z,Pan Z,et al .Exceptional performance of hierarchical Ni-Fe (hydr)oxide@NiCu electrocatalysts for water splitting[J].Advanced Materials,2019,31(8):1806769. [16] Li W,Li F,Yang H,et al .A bio-inspired coordination polymer as outstanding water oxidation catalyst via second coordination sphere engineering[J].Nature Communications,2019,10:5074. [17] Shen J,Wang M,Zhang P,et al .Electrocatalytic water oxidation by copper(Ⅱ) complexes containing a tetra- or pentadentate amine-pyridine ligand[J].Chemical.Communications,2017,53(31):4374-4377.
