The influence of halides on the initial selective dissolution of Cu3Au (1 1 1)

Ankah, Genesis Ngwa; Pareek, Aparna; Cherevko, Serhiy; Topalov, Angel Angelov; Rohwerder, Michael; Renner, Frank Uwe

doi:10.1016/j.electacta.2012.08.059

Cited by 31 publications

(41 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The coupling of an electrochemical cell with online chemical analysis of the electrolyte offers thus timeresolved dissolution analysis which is important in corrosion studies. Recently, this was successfully conducted on single-element or multi-element systems by several groups, including inductively coupled plasma mass spectrometry (ICP-MS) [5][6][7][8][9], ultraviolet-visible spectroscopy [10], or inductively coupled plasma optical emission spectrometry (ICP-OES) [11]. For instance Ogle and coworkers investigated the selective dissolution of austenitic stainless steels during cathodic and anodic pulses by ICP-OES coupling [11].…”

Section: Introductionmentioning

confidence: 98%

“…For instance Ogle and coworkers investigated the selective dissolution of austenitic stainless steels during cathodic and anodic pulses by ICP-OES coupling [11]. Our Institute recently developed a new micro-electrochemical cell which was coupled directly online to ICP-MS [5][6][7], allowing simultaneous electrochemical experiments to be performed. The detailed chemical and electrochemical response is decisive for the respective stability and applicability of structural as well as functional materials.…”

Section: Introductionmentioning

confidence: 99%

“…This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). mechanisms of corrosion reactions or ''applied'' corrosion reactions such as surface etching [7]. Fundamental questions in electrochemistry are therefore often addressed with homogeneous single-element or binary single-crystal alloys.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multi-element-resolved electrochemical corrosion analysis. Part I. Dissolution behavior and passivity of amorphous Fe50Cr15Mo14C15B6

Klemm¹,

Klemm²,

Duarte³

et al. 2014

Corrosion Science

View full text Add to dashboard Cite

a b s t r a c tMulti-element dissolution analysis of amorphous Fe 50 Cr 15 Mo 14 C 15 B 6 in 0.1 M H 2 SO 4 was investigated electrochemically and by coupled online mass spectrometry. We fully discuss the most important aspects of the application of the newly-developed methodology to study complex multi-elemental alloys. The resulting partial dissolution rates of Fe, Cr and Mo reflect the passive behavior and are compared to the measured total current density as function of time. The deviations between the added elemental dissolution currents and the measured total current density are discussed. Furthermore, the inferred growth of oxide thickness was correlated to results obtained from surface analysis.

show abstract

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi-element-resolved electrochemical corrosion analysis. Part I. Dissolution behavior and passivity of amorphous Fe50Cr15Mo14C15B6

Klemm¹,

Klemm²,

Duarte³

et al. 2014

Corrosion Science

View full text Add to dashboard Cite

show abstract

“…7,8 Unlike most base metals, noble metals are usually resistant toward significant oxidation and corrosion in moisture, air and most acidic and alkaline electrolytes. However, they do dissolve at positive potential excursions in parallel to surface oxidation.…”

mentioning

confidence: 99%

Effect of Temperature on Gold Dissolution in Acidic Media

Cherevko

Žeradjanin

Topalov

et al. 2014

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

Temperature has a tremendous effect on the rate and amount of gold dissolution. In potentiodynamic experiments the total amount of dissolved gold increases by a factor of 4.5 when the temperature is increased from 25 to 75 • C. Moreover, the previously reported correlation between the onset of oxide formation and the commencement of the dissolution process is found to be correct for all studied temperatures. Negative shift in the advent of oxidation is accompanied by a similar shift in the dissolution onset potential. Similarly, the dissolution rate rises significantly with temperature during potentiostatic and galvanostatic polarization steps. A correlation between the temperature-dependent oxygen evolution reaction (OER) and gold dissolution is found. Arrhenius plots for the OER and gold dissolution are used to obtain information on the apparent activation energy E A for both processes. It is found that for OER and Au dissolution E A = 57 kJ mol −1 . The later finding suggests that there is a common intermediate for both reactions, the formation of which constitutes the rate-determining step. Over the past few years, our group has published a number of papers on electrochemical dissolution of noble metals (coinage and precious) such as copper, 1 rhodium, 2 platinum, 3,4 gold 5,6 and alloys. 7,8Unlike most base metals, noble metals are usually resistant toward significant oxidation and corrosion in moisture, air and most acidic and alkaline electrolytes. However, they do dissolve at positive potential excursions in parallel to surface oxidation. The relatively low rates of noble-metal corrosion impose severe restrictions on the range of techniques which can be used to reliably investigate these processes. Nevertheless, over the last forty or fifty years, numerous approaches have been proposed, with some providing integral values on the amount of dissolved material during relatively long polarization time and others providing information on the rate of the process directly. The former are based on the post-analysis of the electrolyte by atomic absorption spectroscopy, 9 inductively coupled plasma mass spectrometry (ICP-MS), 10,11 radiotracer technique, 12,13 etc. As an example of the latter we should mention pure electrochemical methods based on comparison of oxide formation and reduction charge, 9 utilization of rotating ring disk electrodes 14,15 or double electrode flow cell [16][17][18][19][20] and coupled techniques like electrochemical quartz crystal nano(micro)balance. [21][22][23] Having extremely small detection limits, along with the ability to detect many elements over a wide linear detection range, ICP-MS is extensively utilized in different areas ranging from forensic to nuclear science. 24 Using an ICP-MS to detect traces of noble metals and coupling it directly to a so-called scanning flow cell (SFC) allowed us to extend ICP-MS applicability further; now including on-line investigation of metals dissolved during an electrochemical treatment. This technique allowed us to precisely quantify the diss...

show abstract

“…The presence of specifically adsorbed anions can significantly influence the electrochemical behaviors of a metal or alloy surface which is of major relevance for electro-catalysis reaction [20][21][22][23], galvanic deposition [24,25], and etching [26,27] and corrosion protection [28][29][30][31][32][33][34][35][36]. Halide ions are the most simple and prototype of anions and ubiquitous in natural and technological environments, their adsorption on metal single crystal surfaces has been investigated in great detail but very scarce research for alloy surfaces especially intermetallic surfaces [37].…”

Section: Introductionmentioning

confidence: 99%