Atomic and Electronic Structure of V–Rh(110) Near-Surface Alloy
- Igor Píš
- ,
- Vitalii Stetsovych
- ,
- Josef Mysliveček
- ,
- Miroslav Kettner
- ,
- Martin Vondráček
- ,
- Filip Dvořák
- ,
- Daniel Mazur
- ,
- Vladimír Matolín
- , and
- Václav Nehasil
Abstract
Vanadia-promoted Rh catalysts and Rh–V alloys have shown enhanced reactivity in several heterogeneous catalytic processes. However, little is known about the role of electronic and geometrical effects of the alloy phase on the chemical reactivity. In this article, we present experimental study on geometric and electronic structure of near-surface ordered alloys prepared by depositing V on Rh(110) surface and by subsequent annealing. STM, LEED, and XPD measurements were combined to determine the atomic structure. The electronic influence of the subsurface vanadium on the Rh(110) surface was elucidated by means of core-level and angle-resolved valence band photoemission spectroscopy. The influence of the alloying on the interaction with gas molecules was probed by CO adsorption. It was found that annealing at 973 K results in a (2 × 1) surface reconstruction of Rh surface atoms along [1̅10] rows induced by subsurface vanadium. Annealing at higher temperatures induces diffusion of vanadium into deeper layers and formation of a (1 × 2) missing-row reconstruction, which is metastable at the bare Rh surface. Photoemission spectroscopy revealed a rather small shift of the Rh valence band centroid upon alloying, which indicates only a small influence of the electronic effect on the reactivity. On the other hand, the (1 × 2) missing-row reconstruction brings about new adsorption sites and low-coordinated Rh atoms which are expected to significantly contribute to the enhanced reactivity of the Rh–V alloy.
Cited By
This article is cited by 10 publications.
- Bernhard von Boehn, Anton Weißbach, Jon-Olaf Krisponeit, Jan Ingo Flege, Jens Falta, Luca Gregoratti, Matteo Amati, Patrick Zeller, Ronald Imbihl. Phase Separation within Vanadium Oxide Islands under Reaction Conditions: Methanol Oxidation at Vanadium Oxide Films on Rh(111). The Journal of Physical Chemistry C 2022, 126
(45)
, 19101-19112. https://doi.org/10.1021/acs.jpcc.2c04174
- Bernhard von Boehn, Ronald Imbihl. Chemical Wave Patterns and Oxide Redistribution during Methanol Oxidation on a V-Oxide Promoted Rh(110) Surface. The Journal of Physical Chemistry C 2018, 122
(24)
, 12694-12703. https://doi.org/10.1021/acs.jpcc.8b00852
- Bernhard von Boehn, Tevfik O. Menteş, Andrea Locatelli, Alessandro Sala, Ronald Imbihl. Reactive Phase Separation during Methanol Oxidation on a V-Oxide-Promoted Rh(110) Surface. The Journal of Physical Chemistry C 2018, 122
(19)
, 10482-10488. https://doi.org/10.1021/acs.jpcc.8b02544
- Bernhard von Boehn, Tevfik O. Menteş, Andrea Locatelli, Alessandro Sala, and Ronald Imbihl . Growth of Vanadium and Vanadium Oxide on a Rh(110) Surface. The Journal of Physical Chemistry C 2017, 121
(36)
, 19774-19785. https://doi.org/10.1021/acs.jpcc.7b04809
- Antonio J. Martínez-Galera, Haojie Guo, Mariano D. Jiménez-Sánchez, Enrique G. Michel, José M. Gómez-Rodríguez. Dirac cones in graphene grown on a half-filled 4d-band transition metal. Carbon 2023, 205 , 294-301. https://doi.org/10.1016/j.carbon.2023.01.004
- Bernhard von Boehn, Ronald Imbihl. Dynamics of Ultrathin Vanadium Oxide Layers on Rh(111) and Rh(110) Surfaces During Catalytic Reactions. Frontiers in Chemistry 2020, 8 https://doi.org/10.3389/fchem.2020.00707
- Igor Píš, Elena Magnano, Silvia Nappini, Federica Bondino. Under-cover stabilization and reactivity of a dense carbon monoxide layer on Pt(111). Chemical Science 2019, 10
(6)
, 1857-1865. https://doi.org/10.1039/C8SC04461A
- Mathias Homann, Bernhard von Boehn, Arjun Malhotra, Luca Gregoratti, Matteo Amati, Patrick Zeller, Ronald Imbihl. Large nucleation barrier for Ni oxide on Rh(110) driving Ni into subsurface sites upon oxidation. Surface Science 2019, 679 , 56-63. https://doi.org/10.1016/j.susc.2018.08.029
- B. von Boehn, R. Imbihl. Large amplitude excitations traveling along the interface in bistable catalytic methanol oxidation on Rh(110). Physical Chemistry Chemical Physics 2017, 19
(28)
, 18487-18493. https://doi.org/10.1039/C7CP01890H
- Han Zhu, Ming Zhang, ShengYing Cai, YingTing Cai, Pan Wang, ShiYong Bao, MeiLing Zou, MingLiang Du. Insitu growth of Rh nanoparticles with controlled sizes and dispersions on the cross-linked PVA–PEI nanofibers and their electrocatalytic properties towards H
2
O
2. RSC Adv. 2014, 4
(2)
, 794-804. https://doi.org/10.1039/C3RA44834G