Soft X-ray photoelectron spectroscopy study of Fe2P(0001)

Electronic Structure of Ni₂P(0001) Studied by Resonant Photoelectron Spectroscopy

“…The valence band spectra of Fe 2 P(0001) also consist of a main band and satellites [13], and the PES spectra measured at hν = 49 and 53 eV are shown in the inset of Fig. 3(b).…”

“…In Fig. 3(b), the integrated intensities of the main band (open circles) and those of the sum of satellites (filled circles) in the PES spectra of Fe 2 P(0001) are plotted as a function of hν [13]. At hν > 55 eV, a Fe MVV Auger emission peak is overlapping with the satellites, and the intensity at hν > 55 eV (filled circles) is the sum of the satellites and Auger peak intensities.…”

“…As for the electronic structure, our group performed an angle-resolved photoemission spectroscopy (ARPES) study on Ni 2 P(0001) and found that the normal-emission spectra consist of a Ni 3d-P 3p hybrid band (main band) and a satellite at 0-4 eV and 8 eV, respectively [11,12]. As for Fe 2 P surfaces, our group recently performed an angle-integrated PES study for Fe 2 P(0001), and found that a Fe 3d-P 3p hybrid band was formed at 0-3 eV, and the band consisted of a peak at 0.2 eV and a shoulder at 2.0 eV [13]. The band seemed to be formed in the lower binding energy side with respect to the Ni 3d-P 3p band in Ni 2 P [13], suggesting that the stabilization of metal sites owing to the bonding with P atoms is ineffective in Fe 2 P. The stabilization of metal sites is thought to be important to prevent deactivation of the surface induced by accumulation of S atoms on active metal sites during HDS reactions.…”

“…As for Fe 2 P surfaces, our group recently performed an angle-integrated PES study for Fe 2 P(0001), and found that a Fe 3d-P 3p hybrid band was formed at 0-3 eV, and the band consisted of a peak at 0.2 eV and a shoulder at 2.0 eV [13]. The band seemed to be formed in the lower binding energy side with respect to the Ni 3d-P 3p band in Ni 2 P [13], suggesting that the stabilization of metal sites owing to the bonding with P atoms is ineffective in Fe 2 P. The stabilization of metal sites is thought to be important to prevent deactivation of the surface induced by accumulation of S atoms on active metal sites during HDS reactions. In this paper, we report the results of an angle integrated PES study on Ni 2 P(0001) using the same experimental set-up as that in our previous study of Fe 2 P(0001) [13].…”

“…The band seemed to be formed in the lower binding energy side with respect to the Ni 3d-P 3p band in Ni 2 P [13], suggesting that the stabilization of metal sites owing to the bonding with P atoms is ineffective in Fe 2 P. The stabilization of metal sites is thought to be important to prevent deactivation of the surface induced by accumulation of S atoms on active metal sites during HDS reactions. In this paper, we report the results of an angle integrated PES study on Ni 2 P(0001) using the same experimental set-up as that in our previous study of Fe 2 P(0001) [13]. The possible origin of the difference in the catalytic activities of Ni 2 P and Fe 2 P will be discussed.…”