Electrochemical Oxygen Reduction Reaction

Si, Fengzhan; Zhang, Yuwei; Yan, Liang; Zhu, Jianbing; Xiao, Meiling; Liu, Changpeng; Wang, Xing; Zhang, Jiujun

doi:10.1016/b978-0-444-63278-4.00004-5

Cited by 39 publications

(29 citation statements)

References 70 publications

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“…~ 1.26 x 10-3 mol/L, techniques based on convective transport of reactants in the solution such as the Rotating Disk Electrode (RDE) and Rotating Ring Disk Electrode (RRDE) are employed to identify the electron transfer mechanism and the associated formation of intermediates. [51][52][53][54][55] The selectivity of 4eor 2epathway is estimated via Koutecky Levich equation.…”

Section: Introductionmentioning

confidence: 99%

Pt-free silver nanoalloy electrocatalysts for oxygen reduction reaction in alkaline media

Qaseem

Chen

et al. 2016

Catal. Sci. Technol.

111

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Section: Introductionmentioning

confidence: 99%

Pt-free silver nanoalloy electrocatalysts for oxygen reduction reaction in alkaline media

Qaseem

Chen

et al. 2016

Catal. Sci. Technol.

111

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“…Given that an ovepotential of |Δϕ| ≳ 0.3 V (over the thermodynamic potential of 1.23 V vs RHE) is required to drive the O 2 reduction reaction on platinum, the potentials measured in our experiments are consistent with O 2 reduction occurring at the electrode. However, because the O 2 reduction reaction depends on the pH of the solution, , the proper flux boundary conditions for OH – and H + are complicated (consumption of H + or production of OH – , depending on the reaction). Nevertheless, the calculated pH profiles shown here were found to be independent of this.…”

mentioning

confidence: 99%

Electrochemically Induced pH Change: Time-Resolved Confocal Fluorescence Microscopy Measurements and Comparison with Numerical Model

Pande

Chandrasekar

Lohse

et al. 2020

J. Phys. Chem. Lett.

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Confocal fluorescence microscopy is a proven technique, which can image near-electrode pH changes. For a complete understanding of electrode processes, time-resolved measurements are required, which have not been achieved previously. Here we present the first measurements of time-resolved pH profiles with confocal fluorescence microscopy. The experimental results compare favorably with a one-dimensional reaction–diffusion model; this holds up to the point where the measurements reveal three-dimensionality in the pH distribution. Specific factors affecting the pH measurement such as attenuation of light and the role of dye migration are also discussed in detail. The method is further applied to reveal the buffer effects observed in sulfate-containing electrolytes. The work presented here is paving the way toward the use of confocal fluorescence microscopy in the measurement of 3D time-resolved pH changes in numerous electrochemical settings, for example, in the vicinity of bubbles.

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“…Dissolved O 2 can be readily reduced on an electrode surface, following the reaction given in eq 1 . 22 In a mass-transport-limited system, the resulting reductive current is therefore linearly correlated to the O 2 concentration in the solution. …”

Section: Resultsmentioning

confidence: 99%

Measuring Both pH and O₂ with a Single On-Chip Sensor in Cultures of Human Pluripotent Stem Cell-Derived Cardiomyocytes to Track Induced Changes in Cellular Metabolism

et al. 2020

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In vitro studies which focus on cellular metabolism can benefit from time-resolved readouts from the living cells. pH and O2 concentration are fundamental parameters upon which cellular metabolism is often inferred. This work demonstrates a novel use of a ruthenium oxide (RuO x ) electrode for in vitro studies. The RuO x electrode was characterized to measure both pH and O2 using two different modes. When operated potentiometrically, continuous pH reading can be obtained, and O2 concentration can be measured chronoamperometrically. In this work, we demonstrate the use of the RuO x electrodes in inferring two different types of metabolism of human pluripotent stem cell-derived cardiomyocytes. We also show and discuss the interpretation of the measurements into meaningful extracellular acidification rates and oxygen consumption rates of the cells. Overall, we present the RuO x electrode as a versatile and powerful tool in in vitro cell metabolism studies, especially in comparative settings.

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Electrochemical Oxygen Reduction Reaction

Cited by 39 publications

References 70 publications

Pt-free silver nanoalloy electrocatalysts for oxygen reduction reaction in alkaline media

Pt-free silver nanoalloy electrocatalysts for oxygen reduction reaction in alkaline media

Electrochemically Induced pH Change: Time-Resolved Confocal Fluorescence Microscopy Measurements and Comparison with Numerical Model

Measuring Both pH and O₂ with a Single On-Chip Sensor in Cultures of Human Pluripotent Stem Cell-Derived Cardiomyocytes to Track Induced Changes in Cellular Metabolism

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Electrochemical Oxygen Reduction Reaction

Cited by 39 publications

References 70 publications

Pt-free silver nanoalloy electrocatalysts for oxygen reduction reaction in alkaline media

Pt-free silver nanoalloy electrocatalysts for oxygen reduction reaction in alkaline media

Electrochemically Induced pH Change: Time-Resolved Confocal Fluorescence Microscopy Measurements and Comparison with Numerical Model

Measuring Both pH and O2 with a Single On-Chip Sensor in Cultures of Human Pluripotent Stem Cell-Derived Cardiomyocytes to Track Induced Changes in Cellular Metabolism

Contact Info

Product

Resources

About

Measuring Both pH and O₂ with a Single On-Chip Sensor in Cultures of Human Pluripotent Stem Cell-Derived Cardiomyocytes to Track Induced Changes in Cellular Metabolism