TY - JOUR

T1 - Structural Transitions Driving Interface Pulses in Methanol Oxidation on Rh(110) and VOx/Rh(110)

T2 - A LEEM Study

AU - von Boehn, Bernhard

AU - Krisponeit, Jon-Olaf

AU - Falta, Jens

AU - Imbihl, Ronald

N1 - Funding Information: The authors are indebted to the Deutsche Forschungsgemeinschaft (DFG) for financial support through projects: 409299786 and 408002857. B.v.B. would like to thank the Department of Inorganic Chemistry of the Fritz Haber Institute of the Max Planck Society for financial support.

PY - 2021/10/21

Y1 - 2021/10/21

N2 - With LEEM (low-energy electron microscopy) and micro-LEED as in situ techniques we have studied the structural transitions in the excitation of traveling interface pulses (TIPs) in bistable methanol oxidation on a bare Rh(110) and on a Rh(110) surface covered with a 0.1 monolayer of V oxide in the 10-4 mbar range. Close to equistability, a (1×1) structure coexists with O-induced reconstructions of the "missing row"type at the interface. An oxidation pulse traveling along the interface exhibits a substructure consisting of various reconstructions of the "missing row"type; on the reduced surface, the slow development of a c(2×2) structure is accompanied by a strong loss of the (0,0)-beam intensity. The addition of 0.1 monolayer of V oxide increases structural disorder but causes no qualitative changes in the structural transitions.

AB - With LEEM (low-energy electron microscopy) and micro-LEED as in situ techniques we have studied the structural transitions in the excitation of traveling interface pulses (TIPs) in bistable methanol oxidation on a bare Rh(110) and on a Rh(110) surface covered with a 0.1 monolayer of V oxide in the 10-4 mbar range. Close to equistability, a (1×1) structure coexists with O-induced reconstructions of the "missing row"type at the interface. An oxidation pulse traveling along the interface exhibits a substructure consisting of various reconstructions of the "missing row"type; on the reduced surface, the slow development of a c(2×2) structure is accompanied by a strong loss of the (0,0)-beam intensity. The addition of 0.1 monolayer of V oxide increases structural disorder but causes no qualitative changes in the structural transitions.

UR - http://www.scopus.com/inward/record.url?scp=85118214079&partnerID=8YFLogxK

U2 - 10.1021/acs.jpcc.1c06106

DO - 10.1021/acs.jpcc.1c06106

M3 - Article

AN - SCOPUS:85118214079

VL - 125

SP - 22539

EP - 22546

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 41

ER -