The amorphous Can alloys prepared by the electrochemical deposition method have excellent electrocatalytic performance. The electronic structure of the alloy electrode plays an important role in the hydrogen evolution reaction. 3. There are many factors that affect the electronic structure of the alloy, such as the atomic number of the alloy constituent elements. The sublimation thermal work function, etc., this article is to use the method to measure the electronic structure of the 6-state alloy by measuring the orbital electron binding energy band width Fermi level and other parameters, and the experimental mechanism, 2 2 experimental methods and The technical samples were deposited on 1 substrate by electrochemical deposition method. All samples were tested on a 17-rotation anode and a ray diffractometer, and no diffraction peaks were found, and the sample was amorphous.
The test of the electron binding energy of each element of the sample and the electron energy band of its valence shell were completed on the 1800 multifunctional electron spectrometer. The ray power of the instrument is 450, and the energy resolution is 09683 tons; the ultimate vacuum is 0.153, which is collected by the FRR mode Mg target 1253.6eV, and the spectrum processing is completed by the DS800 software package provided with the instrument. The energy calibration of the instrument adopts 83368.3 outside 232932.676, and linear calibration such as 484.0, 6, with double-sided tape National Natural Science Foundation funded projects.
3 Results and discussion Pure condition, 6 condition 1 alloy sample characteristic peak electron binding energy value measurement results as shown in 1. According to the data listed in l, and comparing the photoelectron peak binding energy value of the pure element 4, the following points are drawn about the electronic structure of the amorphous Ni-based alloy. Where, the electronic structure of the alloy changes to a certain extent relative to the pure electronic structure, from the condition 232 2. According to the principle of chemical shift, it is clear that the charge transfer occurs between the atoms of all elements in the alloy, and the transfer direction is caused by the electronegativity of the lower In the case of element atoms with high electronegativity, the atoms of the element are transferred. As a result, the outer charge density of the atoms decreases and the binding energy increases. The atoms reduce the binding energy due to the increased electron charge around the atoms. In all alloys, the bonding energy of 232 increases by 0.15, 2 decreases by 0.2, and the electronegativity of 1.9 is lower than that of 2.1, so this electron charge transfer in the alloy is similar to the transition metal-based alloy electron proposed by Zu et al. The charge transfer and transfer direction between the atoms of the base metal and the alloy elements are 5, in principle, consistent. When Asami et al. Studied the hydrogen evolution reaction activity of NiFeP amorphous alloys, they also confirmed that there is charge transfer during the formation of NiFeP alloy, and the transfer direction is the electron direction of NiFe transition metal atoms, atom transfer 71. , 6 and Kuang alloy is added with a proper amount of rare earth elements, 6 or. Their condition 22 spectrum 12.
There is a charge transfer between the atoms of each element in the alloy. For the suppressing atom, the charge not only transfers to the atom, but also receives the electron charge of the atom from the rare earth, so the binding energy of the 2 port 32 is more common. The condition of 232 is low, and the 2 electron binding energy is also reduced, reflecting the complexity of the post-charge transfer due to the addition of rare earth elements in the alloy. From 3 to 632, there are two peaks. The peak position is 885.756 and the other is the shoulder peak of 883.00. Its binding energy is lower than that of pure metal. The binding energy of 883.906 is 0.9 lower. Because the rare earth elements are different from ordinary elements, the lower binding energy means that The atomic charge of an atom to other neighboring atoms is 12, less than, and so the charge transfer is from 6 to Fanhe. In this way, the charge transfer between the atoms of each element in the alloy can be regarded as a model of 4. NiLaP is similar to NiCeP .. From 1 it is also found that the hydrogen evolution superpotential 7, where the binding energy of the 2 ports 32 reacts with the hydrogen evolution of the alloy, has a certain relationship. The smaller the hydrogen evolution superpotential value, the smaller the corresponding binding energy value of the 32 ports. When explaining the electrocatalytic activity mechanism of the hydrogen evolution reaction, 1 thinks that the extra charge atoms are the activation center of the hydrogen evolution reaction in the alloy. The activation capacity is increased, the hydrogen evolution reaction is accelerated, and the hydrogen evolution overpotential value of the hydrogen evolution reaction is reduced.
It is close, so it can be considered that there is a composition in the alloy, and its valence band spectrum is very similar to the spectrum 2 in literature 91. It is clear that this alloy has a hydrogen storage effect, which may be beneficial to increase the activity of hydrogen evolution reaction. The alloy also has a hydrogen storage effect. The valence band spectrum obtained by the method is obtained by differentiation. The fermi energy of Heyue alloy is respectively. , 20.10 and 0.136 Fermi level replaces the electronic chemical potential. The higher the energy of the Fermi level, the smaller the work function value, the easier the electron transfer from the alloy to the proton, resulting in a smaller value of hydrogen evolution superpotential 1 The larger the value, the change is consistent with the hydrogen evolution superpotential of butyl alloy discussed in the literature and the calculated Fermi level change trend. Chong, 6 and, the hydrogen evolution superpotential value of the alloy is obviously smaller than that of the pure electrode. It may be because the work function of the sum is lower than the work function of the state, and the addition of others makes the overall valence band spectrum of the alloy to the work function. The direction is shifted, so that the Fermi energy level rises. This experimental result proves for the first time that there is a definite correspondence between the hydrogen evolution superpotential and the Fermi energy level, which may provide an important experimental method for studying the activation characteristics of the hydrogen evolution reaction.
4 Conclusion In the amorphous state, there is a charge transfer between the atoms of each element in the alloy, and the direction of the transfer depends on the electronegativity of the element, from the element atom with low electronegativity to the atom with high electronegativity, including Due to the charge transfer of the rare earth, excess electrons appear around the alloy atoms or matrix atoms in the alloy. These excess electrons are an important factor affecting the hydrogen evolution reaction. The more residual electrons, the better the catalytic activity. For amorphous alloys containing rare earth, the The change of the binding energy value and hydrogen evolution overpotential value of the Fan 232 caused by the trend.
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