Ir-Doped Ni-based metal–organic framework ultrathin nanosheets on Ni foam for enhanced urea electro-oxidation

Abstract

NiIr-based metal–organic frameworks grown on a nickel foam substrate (NiIr-MOF/NF) are synthesized by a solvothermal method and directly used for urea electro-oxidation.

Two‐Dimensional NiIr@N‐Doped Carbon Nanocomposites Supported on Ni Foam for Electrocatalytic Overall Water Splitting

“…The NiIr-MOF/NF was synthesized accordingt o the previouslyr eported method. [35] Figure S1 (Supporting Information) shows at ypicals canning electron microscopy (SEM) image of the NiIr-MOF/NF,d emonstrating the successful growth of uniform NiIr-MOF nanosheet arrays on the Ni foam substrate. The as-obtained NiIr-MOF/NF was used as the starting material, which was carbonized directly at high temperature (i.e.,5 00 8C) under an itrogen flow,w ithout additional carbon,n itrogen, or metal sources.…”

“…The NiIr@N‐C/NF composite electrode was fabricated through a one‐step annealing strategy using NiIr‐MOF/NF as the precursors (Figure 1). The NiIr‐MOF/NF was synthesized according to the previously reported method [35] . Figure S1 (Supporting Information) shows a typical scanning electron microscopy (SEM) image of the NiIr‐MOF/NF, demonstrating the successful growth of uniform NiIr‐MOF nanosheet arrays on the Ni foam substrate.…”

“…NiIr‐MOF/NF was synthesized according to the previously reported method [35] . Prior to synthesis, a piece of Ni foam (1 cm × 4 cm, 1.5 mm thickness) was first soaked in dilute HCl (3 m ) for about 15 min to eliminate the nickel oxides on the surface, then washed several times with deionized water and ethanol in sequence and dried in air before use.…”

“…NiIr-MOF/NF was synthesized according to the previously reported method. [35] Prior to synthesis, ap iece of Ni foam (1 cm 4cm, 1.5 mm thickness) was first soaked in dilute HCl (3 m)f or about 15 min to eliminate the nickel oxides on the surface, then washed several times with deionized water and ethanol in sequence and dried in air before use. For the preparation of the reaction mixture, Ni(NO 3 ) 2 •6 H 2 O( 0.3 g), C 8 H 6 O 4 (0.105 g), and C 6 H 12 N 2 (0.033 g) were dissolved in 30 mL DMF through as onication process to form an absolutely homogeneous mixed solution.…”

Boosting hydrogen generation by anodic oxidation of iodide over Ni–Co(OH)2 nanosheet arrays

“…3 In this regard, replacing OER with more favorable oxidation reactions at anode has triggered a lot interests, such as tetrahydroisoquinolines oxidation, urea oxidation reaction (UOR), amine oxidation, and N 2 oxidation. [4][5][6][7][8][9][10][11][12][13][14][15] Among them, (UOR) with low equilibrium potential of 0.37 V has been regarded as promising alternative to achieve energy-saving hydrogen generation and great process has been made. [16][17][18] Unfortunately, UOR also undergoes sluggish kinetics due to its multi-electron process and requires highly active electrocatalysts to accelerate its reaction rate.…”