Electrochemical and surface analytical studies of tennantite in acid solution

J. Ásbjörnsson; G. H. Kelsall; D. J. Vaughan; R. A D Pattrick; P. L. Wincott; G. A. Hope

doi:10.1016/j.jelechem.2004.03.026

Electrochemical and surface analytical studies of tennantite in acid solution

J. Ásbjörnsson, G. H. Kelsall, D. J. Vaughan, R. A D Pattrick, P. L. Wincott, G. A. Hope

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

Abstract

The electrochemical oxidation and reduction of the surface of a natural tennantite has been investigated in 0.1 M HCl solution using cyclic voltammetry, chronoamperometry and a rotating ring-disc electrode. Subsequent surface analyses by in situ Raman spectroscopy and ex situ X-ray photoelectron spectroscopy (XPS), together with aqueous phase analysis by inductively coupled plasma-atomic emission spectrometry (ICP-AES) were used to aid in the interpretation of the electrochemical behaviour of this complex system, coupled with Nernst equation predictions of the surface reactions. The XPS results indicated that elemental sulfur, arsenic(III) and arsenic(V) oxides were formed on the surface at electrode potentials of 0 and 0.6 V (SCE), respectively. The Raman spectra of tennantite showed that elemental sulfur was detected on the electrode surface only at potentials ≥ 1 V (SCE), at least for the charge densities passed after 500 s. At potentials

Original language	English
Pages (from-to)	145-152
Number of pages	7
Journal	Journal of Electroanalytical Chemistry
Volume	570
Issue number	1
DOIs	https://doi.org/10.1016/j.jelechem.2004.03.026
Publication status	Published - 15 Aug 2004

Keywords

Chronoamperometry
Cyclic voltammetry
Raman spectroscopy and XPS
RDE
Tennantite

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10.1016/j.jelechem.2004.03.026

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@article{7e62e496161b48d4963991ef0f50a083,

title = "Electrochemical and surface analytical studies of tennantite in acid solution",

abstract = "The electrochemical oxidation and reduction of the surface of a natural tennantite has been investigated in 0.1 M HCl solution using cyclic voltammetry, chronoamperometry and a rotating ring-disc electrode. Subsequent surface analyses by in situ Raman spectroscopy and ex situ X-ray photoelectron spectroscopy (XPS), together with aqueous phase analysis by inductively coupled plasma-atomic emission spectrometry (ICP-AES) were used to aid in the interpretation of the electrochemical behaviour of this complex system, coupled with Nernst equation predictions of the surface reactions. The XPS results indicated that elemental sulfur, arsenic(III) and arsenic(V) oxides were formed on the surface at electrode potentials of 0 and 0.6 V (SCE), respectively. The Raman spectra of tennantite showed that elemental sulfur was detected on the electrode surface only at potentials ≥ 1 V (SCE), at least for the charge densities passed after 500 s. At potentials",

keywords = "Chronoamperometry, Cyclic voltammetry, Raman spectroscopy and XPS, RDE, Tennantite",

author = "J. {\'A}sbj{\"o}rnsson and Kelsall, {G. H.} and Vaughan, {D. J.} and Pattrick, {R. A D} and Wincott, {P. L.} and Hope, {G. A.}",

note = "Times Cited: 8",

year = "2004",

month = aug,

day = "15",

doi = "10.1016/j.jelechem.2004.03.026",

language = "English",

volume = "570",

pages = "145--152",

journal = "Journal of Electroanalytical Chemistry",

issn = "0022-0728",

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TY - JOUR

T1 - Electrochemical and surface analytical studies of tennantite in acid solution

AU - Ásbjörnsson, J.

AU - Kelsall, G. H.

AU - Vaughan, D. J.

AU - Pattrick, R. A D

AU - Wincott, P. L.

AU - Hope, G. A.

N1 - Times Cited: 8

PY - 2004/8/15

Y1 - 2004/8/15

N2 - The electrochemical oxidation and reduction of the surface of a natural tennantite has been investigated in 0.1 M HCl solution using cyclic voltammetry, chronoamperometry and a rotating ring-disc electrode. Subsequent surface analyses by in situ Raman spectroscopy and ex situ X-ray photoelectron spectroscopy (XPS), together with aqueous phase analysis by inductively coupled plasma-atomic emission spectrometry (ICP-AES) were used to aid in the interpretation of the electrochemical behaviour of this complex system, coupled with Nernst equation predictions of the surface reactions. The XPS results indicated that elemental sulfur, arsenic(III) and arsenic(V) oxides were formed on the surface at electrode potentials of 0 and 0.6 V (SCE), respectively. The Raman spectra of tennantite showed that elemental sulfur was detected on the electrode surface only at potentials ≥ 1 V (SCE), at least for the charge densities passed after 500 s. At potentials

AB - The electrochemical oxidation and reduction of the surface of a natural tennantite has been investigated in 0.1 M HCl solution using cyclic voltammetry, chronoamperometry and a rotating ring-disc electrode. Subsequent surface analyses by in situ Raman spectroscopy and ex situ X-ray photoelectron spectroscopy (XPS), together with aqueous phase analysis by inductively coupled plasma-atomic emission spectrometry (ICP-AES) were used to aid in the interpretation of the electrochemical behaviour of this complex system, coupled with Nernst equation predictions of the surface reactions. The XPS results indicated that elemental sulfur, arsenic(III) and arsenic(V) oxides were formed on the surface at electrode potentials of 0 and 0.6 V (SCE), respectively. The Raman spectra of tennantite showed that elemental sulfur was detected on the electrode surface only at potentials ≥ 1 V (SCE), at least for the charge densities passed after 500 s. At potentials

KW - Chronoamperometry

KW - Cyclic voltammetry

KW - Raman spectroscopy and XPS

KW - RDE

KW - Tennantite

U2 - 10.1016/j.jelechem.2004.03.026

DO - 10.1016/j.jelechem.2004.03.026

M3 - Article

SN - 0022-0728

VL - 570

SP - 145

EP - 152

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

IS - 1

ER -

Electrochemical and surface analytical studies of tennantite in acid solution

Abstract

Keywords

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