Preparation and application of a phosphorus-doped cobalt telluride nanomaterial
A nano-material, cobalt telluride technology, applied in the fields of electrochemistry, composite materials and preparation, can solve problems such as large overpotential, achieve high conductivity, easy product structure, and high specific surface area
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Embodiment 1
[0032] (1) Co 3 O 4 Preparation of nanosheets: take 291 mg of Co(NO 3 ) 2 •6H 2 O and 300 mg of urea were dissolved in 35 mL of deionized water and stirred for 30 minutes to form a homogeneous solution; the mixed solution was transferred to a 50 mL stainless steel autoclave lined with Teflon, and hydrothermally reacted at 120 °C for 6 hours; the reaction After finishing, the reaction kettle was cooled to room temperature, and the precipitated product was washed with deionized water and ethanol for 3 to 4 times, and then dried in a vacuum oven at 60°C for 8 hours; finally, the dried product was placed in a tube furnace, and the dried product was placed in an Ar atmosphere at 250 °C. °C (heating rate is 2 °C min -1 ) calcined for 2 hours to obtain Co 3 O 4 Nanosheets;
[0033] (2) CoTe 2 Preparation of nanosheets: take the Co synthesized above 3 O 4 100 mg of nanosheets and 200 mg of Te powder were uniformly ground in a mortar and heated at 5°C for min. -1 The rate wa...
Embodiment 2
[0037] (1) Co 3 O 4 Preparation of nanosheets: the same as in Example 1;
[0038] (2) CoTe 2 Preparation of nanosheets: the same as in Example 1;
[0039] (3) P-CoTe 2 Preparation of nanoparticles: 100 mg CoTe 2 The nanosheets and 200 mg of sodium hypophosphite were ground uniformly in a mortar, and the sample was heated to 300 °C in an Ar atmosphere (the heating rate was 2 °C min. -1 ) was calcined for 120 minutes; then cooled to room temperature, the product was washed three times with deionized water and ethanol, and dried in a vacuum oven at 60 °C for 4 hours to obtain P-CoTe 2 Nanoparticles;
[0040] (4) P-CoTe 2 Nanoparticle electrode catalytic hydrogen evolution performance test: P-CoTe 2 Current density of 10 mAcm in acidic environment -2 , the overpotential is 192mV; the current density is 10 mAcm in alkaline condition -2 , the overpotential is 198mV.
Embodiment 3
[0042] (1) Co 3 O 4 Preparation of nanosheets: the same as in Example 1;
[0043] (2) CoTe 2 Preparation of nanosheets: the same as in Example 1;
[0044] (3) P-CoTe 2 Preparation of nanoparticles: 100 mg CoTe 2 The nanosheets and 300 mg of sodium hypophosphite were ground uniformly in a mortar, and the sample was heated to 300 °C in an Ar atmosphere (the heating rate was 2 °C min. -1 ) was calcined for 120 minutes; then cooled to room temperature, the product was washed three times with deionized water and ethanol, and dried in a vacuum oven at 60 °C for 4 hours to obtain P-CoTe 2 Nanoparticles;
[0045] (4) P-CoTe 2 Nanoparticle electrode catalytic hydrogen evolution performance test: current density of 10 mAcm in acidic environment -2 , with an overpotential of 210 mV and a current density of 10 mAcm in alkaline conditions -2 , the overpotential is 218mV.
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