A kind of super unit cell with high catalytic activity and preparation method thereof
A high catalytic activity, super technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of high price, and achieve the effect of simple preparation process and good catalytic effect
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[0018] A preparation method of a super unit cell with high catalytic activity is obtained by keeping Ni-Pd-P-Si-B amorphous in a protective atmosphere below the crystallization initiation temperature. The Ni-Pd-P-Si-B amorphous composition is: Pd content 15-45 at%, Ni content 35-65 at%, P content 12-16 at%, Si content 1-3 at%, B content 3-5 at%.
[0019] The temperature of insulation is 20-60 degrees Celsius, and the insulation time is 2-10 hours.
Embodiment 1
[0021] The Ni-Pd-P-Si-B amorphous is kept in a protective atmosphere at 50 degrees Celsius below the crystallization initiation temperature for 8 hours. The Pd content in the amorphous is 45 at%, the Ni content is 35 at%, the P content is 16 at%, the Si content is 1 at%, and the B content is 3 at%.
[0022] A crystal with a NiPdSiP super unit cell structure is prepared through the above steps. This unit cell is a monoclinic structure with a unit cell size of 1.8nm. (Pd, Si) and (Ni, P) atoms are arranged alternately in the unit cell. Both arrangement and element distribution are super-ordered structures, and the specific composition distribution and atomic structure distribution are as follows: figure 1 and figure 2 . Hydrogen is produced by water electrolysis on its surface with an overpotential of 50mV.
Embodiment 2
[0024] The Ni-Pd-P-Si-B amorphous is kept in a protective atmosphere at 30 degrees Celsius below the crystallization initiation temperature for 10 hours. The Pd content in the amorphous is 40 at%, the Ni content is 40 at%, the P content is 15 at%, the Si content is 1 at%, and the B content is 4 at%.
[0025] A crystal with a NiPdSiP super unit cell structure is prepared through the above steps. This unit cell is a monoclinic structure with a unit cell size of 1.6nm. (Pd, Si) and (Ni, P) are alternately arranged in the unit cell. Both cloth and element distribution are super-ordered structures. Hydrogen is produced by water electrolysis on its surface with an overpotential of 65mV.
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