Stability and electrochemical properties of reconstructed Pt(110)

Effect of the Surface Structure of Pt(100) and Pt(110) on the Oxidation of Carbon Monoxide in Alkaline Solution: an FTIR and Electrochemical Study

“…It has been also reported that the surface contains a non-negligible number of defects even after hydrogen cooling [40]. Regarding the surface structure, previous studies by ex situ low-energy electron diffraction [41][42][43] have shown that the (1×2) Pt(l10) surface is stable in perchloric and sulfuric acid solution if the potential is restricted to potentials below 0.7 V. There is no previous report based on in situ techniques that shows the presence of the (1×2) reconstruction of the Pt(110) in an electrochemical environment. If there were a fast potential-induced reconstruction, the conclusions about the stability range for Pt(110) could be wrong (like for Au(110) [43]) because the (1×2) structure could be formed back from (1×1) at the immersion potential.…”

Underpotential Deposition on Single-Crystal Metals

“…In electrochemical systems, Pt (111) and Pt(100) do not seem to be reconstructed up to the double-layer region by a positive potential limit as shown by LEED 39 and by STM through CO adsorption. 40 However, Rodes et al claimed that the most carefully treated Pt(100) is reconstructed in 0.lM but not in 0.5M 27 A Pt(110) surface treated by flame annealing and subjected to a cyclic voltammogram in acidic solution was put into an ultrahigh vacuum (UHV) chamber for LEED pattern observation and gave Pt(110)-(l × 2), 28 where the evaluation of the so-called adsorbed hydrogen did not give a 1 to 1 ratio of the adsorbed hydrogen to the surface Pt atom of Pt (110)-(1 × 2). Later, it was suggested that each Pt surface of Pt (110)-(l × 2) accommodated one hydrogen atom according to the amount of the adsorbed hydrogen.…”

“…; the charge densities in the hydrogen region are 218 and respectively, which suggests that the Pt(110) surface is reconstructed in in low energy electron diffraction (LEED) observations in vacuum, after electrochemical treatment, the Pt(100) surface was observed to be in the form of 28 Detailed specification of cyclic voltammograms on Pt (111) and Pt(100) can be found in Ref. 29.…”

Phase Transitions in Two‐dimensional Adlayers at Electrode Surfaces: Thermodynamics, Kinetics, and Structural Aspects

“…The UPD of Cu on Pt(hkl) has been studied by electrochemical techniques [375][376][377][378][379][380][381][382][383][384][385][386], electroreflectance [375], radioactive labeling [387,388], IR-spectroscopy [389,390], electrochemical quartz crystal microbalance (EQCM) [391], in situ STM [389,[392][393][394][395][396], and a variety of X-ray techniques [200,385,[397][398][399][400][401], as well as ex situ UHV-methods such as LEED, AES, and XPS [389,399,[402][403][404][405][406]. Figure 21 shows a slow scan voltammogram of Cu-UPD on a high-quality [390,395,396] and SXS [408], and is in agreement with ex situ XPS and LEED investigations [389,390,402].…”