Nano‐MOF‐5 (Zn) Derived Porous Carbon as Support Electrocatalyst for Hydrogen Evolution Reaction

Abstract

The design of an efficient electrocatalyst with controlled morphology and structural characteristics remain a challenging task for advanced electrochemical hydrogen evolution reaction (HER). Herein a simple method is utilized to improve the HER activity by introducing Fe/Pt bimetallic nanoparticles supported on highly porous carbon (PC) viz. one step carbonization of Nano-MOF-5(Zn) as precursor (metal organic framework). The as prepared Nano MOF-5(Zn), Fe/PtÀ PC and PC derived from MOF were characterized by various techniques like X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, BET (nitrogen adsorption/desorption isotherms) and Field emission scanning electron microscopy (FE-SEM). The developed FeÀ Pt/PC exhibits an optimal HER performance with low overpotential (85.4 mV) and a Tafel slope of 42.4 mV dec À 1 . The electrochemical results show that the developed material provides a viable approach for developing inexpensive Pt-based catalyst for HER.

Monometallic interphasic synergy via nano-hetero-interfacing for hydrogen evolution in alkaline electrolytes

“…The D -band around 1335 cm −1 and G -band around 1566 cm −1 represent the defective and crystalline graphitic structure, respectively. The intensity ratio of D and G bands, depicted as I D /I G , is therefore an indicator of the degree of graphitization, in that low-intensity ratios (I D /I G < 1) reveal a high degree of graphitization while high-intensity ratios (I D /I G > 1) refer to a defective and disordered graphitic structure inclining to amorphicity 41 . Thus, the slightly higher intensity of D band than G band in the optimal nano-heterostructure with added ionic Ni in the solvothermal reaction with an I D /I G ratio of 1.12 indicates a defective and amorphous graphitic network, while Ni(OH) 2 /NF only depicts broad and weak Ni-O vibrations.…”

Recent advances in metal-organic frameworks for X-ray detection

“…Over the past decades, MOFs have been extensively used in gas storage, catalysis, and adsorptive separation due to their ultrahigh porosity (>90% free volume), large internal surface area, fully exposed active sites, and tuneable pores [3,[5][6][7][8][9]. With the development of MOFs, the properties of photoluminescence and semiconductor performance with photoelectric conversion have attracted tremendous researchers to extend their applications into chemical sensors, electrical devices, and biomedicines [1,[10][11][12][13][14][15][16][17].…”