Ni 2 P (0001) by XPS

Abstract

XPS spectra are reported for a well-ordered Ni2P (0001) surface. These are the first reported photoemission spectra for this transition metal phosphide in single crystal form. Ion bombardment and annealing produces an ordered surface.

Synthesis of an yttrium-modified bulk Ni2P catalyst with high hydrodesulfurization activity

“…As shown in Fig. 2(b), the peaks centered at 128.8-130.3 eV can be assigned to P δ+ species in the Ni 2 P phase [22,25], and the peak at 134.5-134.8 eV can be attributed to phosphate (P 5+ ) due to superficial oxidation of the Ni 2 P particles [24]. It is worth noting that the P 2p 3/2 binding energy corresponding to phosphide phase increases with increasing Y content in the catalyst due to the electron transfer from phosphide species to yttrium.…”

“…For all catalysts, the Ni 2p 3/2 spectrum consists of three contributions. The bands centered at 852.5-852.7 eV and 856.1~856.7 eV can be attributed to the Ni δ+ species in Ni 2 P phase and Ni 2+ species interacting with phosphate as a consequence of a superficial passivation, respectively [22][23][24]. The bands centered at 860.8-861.2 eV can be assigned to the shake-up satellite [4,21].…”

The effect of neodymium content on dibenzothiophene HDS performance over a bulk Ni2P catalyst

“…As shown in Fig. 2(b), the peaks centered at 128.8-129.9 eV can be assigned to P δ − species in the Ni 2 P phase [12] and the peak at 134.1-134.8 eV can be attributed to phosphate (P 5+ ) due to superficial oxidation of the Ni 2 P particles [14,15]. XPS analyses for the Ni 2 P and Nd x Ni 2 P catalysts were used to calculate the surface Ni δ+ /ΣNi and P/Ni atomic ratios ( Table 2).…”

The hydrogenation of aromatic-naphthalene with Ni2P/CNTs

“…16,17 For Ni 2 P, the binding energies at 857.9 and 134.8 eV are assigned to Ni 2+ and P 5+ species. 16,17 For Ni 2 P, the binding energies at 857.9 and 134.8 eV are assigned to Ni 2+ and P 5+ species.…”