In situ UV-visible reflectance spectroscopy on single crystal Pt(111) microfacets

Iosif Fromondi; Ana Lopez Cudero; Juan Feliu; Daniel Alberto Scherson

doi:10.1149/1.1830396

In situ UV-visible reflectance spectroscopy on single crystal Pt(111) microfacets

Iosif Fromondi^*, Ana Lopez Cudero, Juan Feliu, Daniel Alberto Scherson

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

The intensity of a HeNe laser light (633 nm), R, reflected off Pt(111) microfacets in 0.1 M H₂SO₄ was monitored as a function of potential, E, in the range 0.05 ≤ E ≤ 0.85 V vs. a reversible hydrogen electrode. As reported earlier for massive Pt(111) [Molina et al., J. Chim. Phys., 88, 1339 (1991)], R was found to vary monotonically with E within the potential region of the so-called "butterfly" peak. Plots of 1/R(∂R/∂E) vs. E calculated from the R(E) vs. E curves recorded both with massive Pt(111) and the facets yielded within the region of this peak a bell shaped curve similar to that reported for massive Pt(111) using modulated reflectance techniques [Huerta et al., J. Electroanal. Chem., 463, 109 (1999)]. A more quantitative analysis of the results obtained in this work revealed a striking similarity between that bell-shape curve and the "butterfly" peak.

Original language	English
Journal	Electrochemical and Solid-State Letters
Volume	8
Issue number	1
DOIs	https://doi.org/10.1149/1.1830396
Publication status	Published - 2005 Jan 31
Externally published	Yes

ASJC Scopus subject areas

Chemical Engineering(all)
Materials Science(all)
Physical and Theoretical Chemistry
Electrochemistry
Electrical and Electronic Engineering

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title = "In situ UV-visible reflectance spectroscopy on single crystal Pt(111) microfacets",

abstract = "The intensity of a HeNe laser light (633 nm), R, reflected off Pt(111) microfacets in 0.1 M H2SO4 was monitored as a function of potential, E, in the range 0.05 ≤ E ≤ 0.85 V vs. a reversible hydrogen electrode. As reported earlier for massive Pt(111) [Molina et al., J. Chim. Phys., 88, 1339 (1991)], R was found to vary monotonically with E within the potential region of the so-called {"}butterfly{"} peak. Plots of 1/R(∂R/∂E) vs. E calculated from the R(E) vs. E curves recorded both with massive Pt(111) and the facets yielded within the region of this peak a bell shaped curve similar to that reported for massive Pt(111) using modulated reflectance techniques [Huerta et al., J. Electroanal. Chem., 463, 109 (1999)]. A more quantitative analysis of the results obtained in this work revealed a striking similarity between that bell-shape curve and the {"}butterfly{"} peak.",

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AU - Fromondi, Iosif

AU - Cudero, Ana Lopez

AU - Feliu, Juan

AU - Scherson, Daniel Alberto

PY - 2005/1/31

Y1 - 2005/1/31

N2 - The intensity of a HeNe laser light (633 nm), R, reflected off Pt(111) microfacets in 0.1 M H2SO4 was monitored as a function of potential, E, in the range 0.05 ≤ E ≤ 0.85 V vs. a reversible hydrogen electrode. As reported earlier for massive Pt(111) [Molina et al., J. Chim. Phys., 88, 1339 (1991)], R was found to vary monotonically with E within the potential region of the so-called "butterfly" peak. Plots of 1/R(∂R/∂E) vs. E calculated from the R(E) vs. E curves recorded both with massive Pt(111) and the facets yielded within the region of this peak a bell shaped curve similar to that reported for massive Pt(111) using modulated reflectance techniques [Huerta et al., J. Electroanal. Chem., 463, 109 (1999)]. A more quantitative analysis of the results obtained in this work revealed a striking similarity between that bell-shape curve and the "butterfly" peak.

AB - The intensity of a HeNe laser light (633 nm), R, reflected off Pt(111) microfacets in 0.1 M H2SO4 was monitored as a function of potential, E, in the range 0.05 ≤ E ≤ 0.85 V vs. a reversible hydrogen electrode. As reported earlier for massive Pt(111) [Molina et al., J. Chim. Phys., 88, 1339 (1991)], R was found to vary monotonically with E within the potential region of the so-called "butterfly" peak. Plots of 1/R(∂R/∂E) vs. E calculated from the R(E) vs. E curves recorded both with massive Pt(111) and the facets yielded within the region of this peak a bell shaped curve similar to that reported for massive Pt(111) using modulated reflectance techniques [Huerta et al., J. Electroanal. Chem., 463, 109 (1999)]. A more quantitative analysis of the results obtained in this work revealed a striking similarity between that bell-shape curve and the "butterfly" peak.

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In situ UV-visible reflectance spectroscopy on single crystal Pt(111) microfacets

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