Preparation and application of bimetallic phosphide growing on foamed nickel and derived by taking Prussian blue analogue as template
A technology of Prussian blue and nickel foam, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems that the performance of single metal phosphide cannot be satisfied
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Embodiment 1
[0032] (1) Cut the nickel foam into cubes with a size of 1 cm×1 cm, sonicate in 3 M hydrochloric acid for 30 min, then in deionized water for 1–2 h, and then sonicate in acetone and ethanol solutions 30 min, then ultrasonically in deionized water for 2–3 h (change the water every 30 min), and finally vacuum-dry at 60°C for 6 h.
[0033] (2) Add 3 mmol Ni(NO 3 ) 2 ·6H 2 O and 30 mmol CO(NH 2 ) 2 and 10 mmol NH 4 Dissolve F in 60 ml of distilled water, transfer the treated nickel foam to a hydrothermal reaction kettle with a polytetrafluoroethylene liner, and conduct a hydrothermal reaction at 90°C for 10 h, and the formed Ni(OH) 2 / NF was washed 3–4 times with deionized water and ethanol, dried in vacuum at 55–60°C for 10–12 h, and subsequently, 2 mmol K 3 [Fe(CN) 6 ] dissolved in 60 ml of deionized water and mixed with Ni(OH) 2 / NF precursor was transferred to a hydrothermal reactor lined with polytetrafluoroethylene, hydrothermally reacted at 90 °C for 24 h, the obtai...
Embodiment 2
[0037] (1) Same as implementation 1;
[0038] (2) Same as implementation 1;
[0039] (3) Place 23 mg NiFe PBA / NF downstream of the porcelain boat, place 230 mg NaH 2 PO 2 .H 2 O was placed upstream, and subsequently, the porcelain boat was placed in a tube furnace and heated at 4–6 °C min under an argon (Ar) atmosphere. -1 The heating rate was annealed at 300°C for 2 h, and after the temperature in the tube was lowered to room temperature, the samples were collected to prepare the bimetallic phosphide NiFeP@NC / NF;
[0040] (4) Electrochemical performance test of NiFeP@NC / NF: at a current density of 10mA.cm -2 , the overpotential of NiFeP@NC / NF is 406 mV, and that of Tafel is 223 mV dec -1 .
Embodiment 3
[0042] (1) Same as embodiment 1;
[0043] (2) Same as embodiment 1;
[0044] (3) 23 mg NiFe PBA / NF was placed downstream of the porcelain boat, and 690 mg NaH 2 PO 2 .H 2 O was placed upstream, and subsequently, the porcelain boat was placed in a tube furnace and heated at 4–6 °C min under an argon (Ar) atmosphere. -1 The heating rate was annealed at 350 °C for 2 h, and after the temperature in the tube was lowered to room temperature, the samples were collected to prepare the bimetallic phosphide NiFeP@NC / NF.
[0045] (4) Electrochemical performance test of NiFeP@NC / NF: at a current density of 10mA.cm -2 , the overpotential of NiFeP@NC / NF is 292 mV, and that of Tafel is 138 mV dec -1 .
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