1991
DOI: 10.1016/0022-0728(91)85412-i
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Structure, composition, thermal stability and electrochemical reactivity of HS−(aq)-derived species chemisorbed at Pd(III) electrode surfaces

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Cited by 13 publications
(8 citation statements)
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“…9 The ( 7 × 7)R19.1°structure has also been reported frequently on the (111) face in uhv. Thus, it was first proposed in 1968 25 and confirmed later 31,32 on Cu(111) and clearly observed by STM 33 and LEED 34 on Pd(111). Normally, however, the detailed structural model proposed for the 7 phase is that in Figure 9a.…”
Section: Discussionsupporting
confidence: 54%
“…9 The ( 7 × 7)R19.1°structure has also been reported frequently on the (111) face in uhv. Thus, it was first proposed in 1968 25 and confirmed later 31,32 on Cu(111) and clearly observed by STM 33 and LEED 34 on Pd(111). Normally, however, the detailed structural model proposed for the 7 phase is that in Figure 9a.…”
Section: Discussionsupporting
confidence: 54%
“…Typically, under these conditions a high number of lattice defects were observed, consisting of monatomic vacancies distributed randomly over the Se atomic layer. (√7 × √7) R 19.1° structures are frequently encountered with halide and chalcogenide overlayers on (111) faces of face-centered cubic metals. ,, However, these structures are normally characterized by a three-sevenths fractional coverage. Thus, a familiar (√7 × √7) R 19.1° structural model has a unit cell with two atoms inside and four at the four vertexes.…”
Section: Resultsmentioning
confidence: 99%
“…(The thermodynamic origin of the sharp, near δ-function voltammogram separating the two different surface structures will further be investigated.) The subsequent coulometric analysis (Experimental Section) based upon the well-known reaction stoichiometry involving six electrons per one S-adsorbate, , indicates that the (1×1) structure corresponds to near full monolayer coverage (0.94 ± 0.05 and 0.89 ± 0.05 monolayer in 1.0 and 10 mM Na 2 S solutions, respectively). The coulometry also shows that the voltammetric oxidation during the first scan reduces the coverage approximately by half (to 0.47 ± 0.03 monolayer).…”
Section: Resultsmentioning
confidence: 99%
“…of cyclestotal charge, coulometry a (μC/cm 2 )coverage from coulometry b monolayercoverage from AES monolayercoverage from LEED monolayerLEED structures 0 1365 0.94 0.95 1.0 (1×1) 1 682 0.47 0.44 0.5 (2×2) at 1 / 2 monolayer 2 407 0.28 0.31 0.33 (√3×√3) R 30° 3 247 0.17 0.22 0.25 p(2×2) at 1 / 4 monolayer 4 131 0.09 0.10 <0.25 weak (2×2) 20 0 ∼0 0.02 0 (1×1) a Net sulfur oxidation charge obtained by subtracting surface oxidation charge from the total charge. b Assuming 6 electron process per one surface sulfur adatom and 242 μC/cm 2 per 1e surface redox reaction at the Pt(111) electrode. , …”
Section: Resultsmentioning
confidence: 99%
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