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• Three-metal lanthanide MOF was electrochemically constructed for the first time. • A high specific capacitance of 965 F g−1 was achieved at 5 A g−1. • A superior cycling performance of 94.5% was observed after 6000 cycles at 5 A g−1. In this work, a novel mixed-lanthanide metal–organic framework (ML-MOF, ML = La3+, Gd3+ and Tm3+) is synthesized for the first time through a simple reductive electrodeposition procedure onto nickel foam and its charge storage ability is investigated. The as-prepared ML-MOF is characterized through FE-SEM, EDS, XRD, FT-IR and TGA analyses. The results of these analyses confirmed deposition of the crystalline well-defined rod-like ML-MOF with composition of {La 2 Gd 0.5 Tm 0.5 BTC]. x H 2 O} n onto Ni foam. The fabricated ML-MOF/NF electrode delivered specific capacity values of 965F g−1 and 594 F g−1 at 5 and 50 A g−1, and capacity retention of 94.5% after 6000 cycles at high current load of 5 A g−1, which confirmed its superior rate ability and excellent cycling performance. Based on the results, the applied electrochemical strategy is introduced as a simple facile way for synthesis of various ML-MOF materials for different electrochemical applications. [ABSTRACT FROM AUTHOR]

The key to synthesis highly efficient MoS 2 based electrocatalyst for hydrogen evolution reaction (HER) is to construct a reasonable composite system structure to improve the stability, reduce the aggregation and improve the intrinsic poor conductivity. In this paper, MoS₂ composite of erbium-based metal-organic framework (noted as Er-MOF/MoS 2) were synthesized by hydrothermal method. The morphology and structure of the synthesized samples were characterized by powder X-ray diffraction (XRD), field emission electron microscopy (FESEM), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS), and the electrocatalytic performances were tested by linear sweep voltammograms (LSV), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), i-t. On the basis of the experiment, Er-MOF/MoS 2 shows improved conductivity and more exposed active sites, exhibiting excellent HER activity in acidic media, with only 234 mV overpotential to achieve 10 mA cm−2, and a Tafel slope of 54.3 mV dec−1. This strategy of porous structure of MoS 2 composite rare earth metal organic framework materials provides a novel and effective solution for preparing high performance MoS 2 based electrocatalyst. • Er-MOF and Er-MOF/MoS 2 were prepared by hydrothermal method. • Er-MOF as supports improved the catalytic activity and more exposed active sites of MoS 2 in acidic media. • Er-MOF/MoS 2 shows excellent long-term durability. [ABSTRACT FROM AUTHOR]

Weak electrical conduction impedes the application of Metal-organic framework (MOF) in electrochemistry. In this work, palladium-based MOF (Pd/MOF) is synthesized via i) simple solvothermal process and ii) direct chemical reduction method. N 2 adsorption-desorption isotherms and thermogravimetric analyzer show that MOF have large specific surface area and good thermal stability. The synthesized materials were tested in acidic condition for hydrogen evolution reaction (HER). Electrochemical test results show that Pd/MOF with tafel slope of 85 mV·dec−1, onset overpotential of 105 mV and ideal stability has better performance than bulk MOF for HER. The enhanced performance can be ascribed to the large porosity and specific surface of MOF, and the synergistic effect between Pd and MOF toward H 2 production. Image 1 • Pd enhanced MOFs has been prepared with a simple two-step method. • Pd/MOFs material has good electrocatalytic activity and stability for HER. • Pd/MOFs are spherical with a radius of 2.2 μm. [ABSTRACT FROM AUTHOR]