The study of the H2O2 during oxygen reduction process on typically corroding metal surface using tip generation-substrate collection mode of SECM

Zhang, Qinhao; Liu, Pan; Zhu, Zejie; Cao, Fahe

doi:10.1016/j.corsci.2019.108312

Cited by 23 publications

(15 citation statements)

References 34 publications

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“…The presence of such ions seems to fasten the formation of crystalline CuNSs rather than amorphous and less active structures. Nevertheless, selectivity was not acquired, since the intermediate could not be oxidized (detected) at the Au tip, 136 although this has been achieved by the previously mentioned work of Kim et al 128 Additionally, copper was studied for its ORR activity by Zhang et al 137 with the purpose of evaluating its corrosion properties. The investigation was carried out with SECM in TG/ SC mode with which the amount of H 2 O 2 was determined as well.…”

Section: Oxygen Reduction Reaction (Orr)mentioning

confidence: 99%

“…The low amount of intermediate produced (20% in neutral and 10% in alkaline solution) suggested that the electron transfer occurred mostly through a four-electron transfer at both pHs. 137 Some groups have studied electrocatalysts that are metalfree, such as Tiwari et al 138 who have evaluated the performance of nitrogen-bearing carbon spheres (NCSs) synthesized at 600, 800 and 900 C (NCS-600, NCS-800 and NCS-900). The application of metal free carbon-based nanomaterials in electrocatalysis has emerged recently, thanks to their good conductivity, high surface area and stability.…”

Section: Oxygen Reduction Reaction (Orr)mentioning

confidence: 99%

“…Additionally, copper was studied for its ORR activity by Zhang et al 137 with the purpose of evaluating its corrosion properties. The investigation was carried out with SECM in TG/SC mode with which the amount of H 2 O 2 was determined as well.…”

Section: Electrochemical Reactionsmentioning

confidence: 99%

Section: Electrochemical Reactionsmentioning

confidence: 99%

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Local probe investigation of electrocatalytic activity

et al. 2021

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Section: Oxygen Reduction Reaction (Orr)mentioning

confidence: 99%

Section: Oxygen Reduction Reaction (Orr)mentioning

confidence: 99%

Section: Electrochemical Reactionsmentioning

confidence: 99%

Section: Electrochemical Reactionsmentioning

confidence: 99%

See 2 more Smart Citations

Local probe investigation of electrocatalytic activity

et al. 2021

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“…61 Other influences that affect the stability of H2O2, once it reaches the bulk, are peroxide concentration, pH and temperature of the solution, as well as the presence of homogeneous or heterogenous catalysts that favor H2O2 decomposition. 60,62,63 This can be for example the presence of Fe 3+ions, 64 Cu 2+ -ions, 62 or I --ions 63 .…”

Section: Intermittent-flow Respirometric Experimentsmentioning

confidence: 99%

Respirometric in Situ Methods for Real-Time Monitoring of Corrosion Rates: Part II. Immersion

Strebl¹,

Bruns²,

Schulze³

et al. 2020

Preprint

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With the aim to open a new window into corrosion processes this paper presents respirometric methods for real-time in situ monitoring of corrosion rates under immersion conditions. With these techniques, sensitive, non-destructive corrosion rate measurements are possible on basically all metals and alloys. Different methods are presented that enable to monitor HER, ORR or both reactions simultaneously based on the amount of evolved H2 or the amount of consumed O2 by volumetric, manometric and sensor-based approaches. Various research examples are presented, demonstrating the benefits and limitations of the different approaches. For Mg alloys, besides HER, ORR plays a role in the cathodic reactions and a good correlation of the total cathodic charge with mass loss was obtained. H2 dissolution into the electrolyte was identified as an important factor. The results obtained for Zn immersion corrosion in intermittent-flow and flow-through respirometric experiments suggest that the ORR mechanism leads to the generation of stable H2O2 under these conditions. As a result, the effective number of exchanged electrons for one O2 molecule was found to be in between two and four. The here introduced respirometric techniques allow new insights into corrosion mechanisms, in addition to enabling real-time monitoring of corrosion.

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Probing Individual Cuprous Oxide Microcrystals towards Carbon Dioxide Reduction by using In Situ Raman‐coupled Scanning Electrochemical Microscopy

et al. 2021

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In this work, the simultaneous investigation of a single cuprous oxide microcrystal towards CO2 electroreduction (CRR, CO2 reduction reaction) by using Raman microscopy and scanning electrochemical microscopy (SECM) is shown. Cu2O microcrystals were electrochemically crystallized on an indium‐doped tin oxide‐substrate (ITO). Structural changes of the Cu2O microcrystal are observed in situ by Raman microcopy, which indicates their fast conversion into elemental Cu at low overpotentials. Simultaneously, detection of products of the CO2 reduction is carried out electrochemically using the sample‐generation tip‐collection mode (SG/TC) of SECM and formate ions are the main product of CRR, as detected by a 10 μm Pt ultramicroelectrode (UME). Thus, with our approach, the very beginning of the CRR (onset potential), potential‐dependent product formation as well as structural changes in the catalyst can be precisely investigated.

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The study of the H2O2 during oxygen reduction process on typically corroding metal surface using tip generation-substrate collection mode of SECM

Cited by 23 publications

References 34 publications

Local probe investigation of electrocatalytic activity

Local probe investigation of electrocatalytic activity

Respirometric in Situ Methods for Real-Time Monitoring of Corrosion Rates: Part II. Immersion

Probing Individual Cuprous Oxide Microcrystals towards Carbon Dioxide Reduction by using In Situ Raman‐coupled Scanning Electrochemical Microscopy

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