A kind of transition metal sulfide core-shell nanosphere hydrogen evolution catalyst and preparation method thereof
A transition metal and sulfide technology, which is applied in the field of transition metal sulfide core-shell nanosphere hydrogen evolution catalyst and its preparation, can solve the problems of sparse active sites and poor conductivity of the catalytic active layer, and achieve large active reaction area and low cost , the effect of improving the conductivity
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Embodiment 1
[0026] The 100-mesh metal tungsten powder with a purity of 99.9% and the 100-mesh tungsten disulfide powder with a purity of 99.95% were mixed at a ratio of 1:2, and then ball milled in a nitrogen atmosphere for 28 hours. The ball-milled mixed powder was filled into a two-inch mold, and pressed at 100° C. for 36 hours to make the target target. The aluminum foil with a thickness of 120 μm was cold-rolled 7 times with a calender, and finally pressed to 5 μm; then it was ultrasonically cleaned and vacuum-dried for 24 hours; then it was cut into 8×8mm 2 The slender strips are used as substrates for deposition, such as figure 1 As shown, the deposition substrate is fixed upside down on the heating table, and the target target is fixed under the heating table, and the distance between the target and the substrate is 40mm; in order to make the prepared catalytic active layer more uniform, the heating table drives the deposition substrate to rotate at 2rpm ; In order to ensure the s...
Embodiment 2
[0029] The 120-mesh metal tungsten powder with a purity of 99.95% and the 120-mesh tungsten disulfide powder with a purity of 99.9% were mixed at a ratio of 1:2, and then ball milled in a nitrogen atmosphere for 32 hours. The ball-milled mixed powder was filled into a two-inch mold, and pressed at 80° C. for 30 hours to make a target target. 8×8mm 2 The commercial glassy carbon electrode is used as the substrate for deposition. The deposition substrate is fixed upside down on the heating stage, and the target target is fixed under the heating stage. The distance between the target and the substrate is 45 mm; The table drives the deposition substrate to rotate at 2 rpm; in order to ensure the service life of the target target, the target target rotates in reverse at a speed of 30 rpm. Then adjust and stabilize the krypton fluoride laser energy to 280mJ / mm 2 ;The laser frequency is set to 10Hz, and it is scanned and bombarded at a speed of 5mm / s along the radial direction of t...
Embodiment 3
[0032] The 80-mesh metal tungsten powder with a purity of 99.99% and the 80-mesh tungsten disulfide powder with a purity of 99.95% were mixed in a ratio of 1:2, and then ball milled in a nitrogen atmosphere for 24 hours. The ball-milled mixed powder was filled into a two-inch mold, and pressed at 100° C. for 40 hours to make a target target. The aluminum foil with a thickness of 120 μm was cold-rolled 9 times with a calender, and finally pressed to 4.5 μm; then it was ultrasonically cleaned and vacuum-dried for 24 hours; then it was cut into 8×8mm 2 The slender strip is used as the substrate for deposition, and the deposition substrate is fixed upside down on the heating stage, and the target target is fixed under the heating stage, and the distance between the target and the substrate is 40 mm; in order to make the prepared catalytic active layer more uniform, the heating stage The deposition substrate is driven to rotate at 2 rpm; in order to ensure the service life of the t...
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