Electron spin resonance studies of formation of SO2- radicals on calcium oxide

Yoshio Ono; Hiroyuki Takagiwa; Shun Ichi Fukuzumi

doi:10.1039/F19797501613

Electron spin resonance studies of formation of SO₂^- radicals on calcium oxide

Yoshio Ono
, Hiroyuki Takagiwa
, Shun Ichi Fukuzumi

Department of Chemistry & Nanoscience

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

6 Scopus citations

Abstract

The formation of SO₂^- radicals on CaO has been studied by e.s.r. spectroscopy. CaO, prepared by evacuating CaCO₃ at 1173 K was exposed to sulphur dioxide at 473 K. Under these conditions, SO ₂^- radicals were observed at concentrations of ≈ 3 × 10¹⁷ spins g^-1. The effect of the heat-treatment temperature of the starting CaCO₃ and of the adsorption temperature have been examined. The SO₂^- radicals are stable up to 473 K, but decay with second order kinetics above 498 K. The radicals react with oxygen to form SO₄^- radicals at 77 K and SO ₃^- radicals at room temperature.

Original language	English
Pages (from-to)	1613-1618
Number of pages	6
Journal	Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
Volume	75
DOIs	https://doi.org/10.1039/F19797501613
State	Published - 1979

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title = "Electron spin resonance studies of formation of SO2- radicals on calcium oxide",

abstract = "The formation of SO2- radicals on CaO has been studied by e.s.r. spectroscopy. CaO, prepared by evacuating CaCO3 at 1173 K was exposed to sulphur dioxide at 473 K. Under these conditions, SO 2- radicals were observed at concentrations of ≈ 3 × 1017 spins g-1. The effect of the heat-treatment temperature of the starting CaCO3 and of the adsorption temperature have been examined. The SO2- radicals are stable up to 473 K, but decay with second order kinetics above 498 K. The radicals react with oxygen to form SO4- radicals at 77 K and SO 3- radicals at room temperature.",

author = "Yoshio Ono and Hiroyuki Takagiwa and Fukuzumi, \{Shun Ichi\}",

year = "1979",

doi = "10.1039/F19797501613",

language = "English",

volume = "75",

pages = "1613--1618",

journal = "Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases",

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T1 - Electron spin resonance studies of formation of SO2- radicals on calcium oxide

AU - Ono, Yoshio

AU - Takagiwa, Hiroyuki

AU - Fukuzumi, Shun Ichi

PY - 1979

Y1 - 1979

N2 - The formation of SO2- radicals on CaO has been studied by e.s.r. spectroscopy. CaO, prepared by evacuating CaCO3 at 1173 K was exposed to sulphur dioxide at 473 K. Under these conditions, SO 2- radicals were observed at concentrations of ≈ 3 × 1017 spins g-1. The effect of the heat-treatment temperature of the starting CaCO3 and of the adsorption temperature have been examined. The SO2- radicals are stable up to 473 K, but decay with second order kinetics above 498 K. The radicals react with oxygen to form SO4- radicals at 77 K and SO 3- radicals at room temperature.

AB - The formation of SO2- radicals on CaO has been studied by e.s.r. spectroscopy. CaO, prepared by evacuating CaCO3 at 1173 K was exposed to sulphur dioxide at 473 K. Under these conditions, SO 2- radicals were observed at concentrations of ≈ 3 × 1017 spins g-1. The effect of the heat-treatment temperature of the starting CaCO3 and of the adsorption temperature have been examined. The SO2- radicals are stable up to 473 K, but decay with second order kinetics above 498 K. The radicals react with oxygen to form SO4- radicals at 77 K and SO 3- radicals at room temperature.

UR - https://www.scopus.com/pages/publications/37049103661

U2 - 10.1039/F19797501613

DO - 10.1039/F19797501613

M3 - Article

AN - SCOPUS:37049103661

SN - 0300-9599

VL - 75

SP - 1613

EP - 1618

JO - Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases

JF - Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases

ER -

Electron spin resonance studies of formation of SO2- radicals on calcium oxide

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Electron spin resonance studies of formation of SO₂^- radicals on calcium oxide