READ ME File For 'Supporting data: The role of water in the electrochemical response of platinum'

Dataset DOI: 10.5258/SOTON/D1837

ReadMe Author: Tammy Nimmo, University of Southampton

This dataset supports the thesis entitled "The role of water in the electrochemical response of platinum"
AWARDED BY: Univeristy of Southampton
DATE OF AWARD: 2021


DESCRIPTION OF THE DATA:
This dataset includes the raw data associated with electrochemical experiments to study the OCP of platinum and gold rotating disc electrodes in N2 and O2 purged HClO4 and NaOH electrolyte (Chapter 3), and experiments to study the effect of water addition on the oxygen reduction reaction at platinum and gold microdisc electrodes in dimethyl sulfoxide containing TBA+ (Chapter 4) and Na+ and K+ (Chapter 5) cations in the supporting electrolyte salts. 

Experimental details for each file can be found by looking in the relevant chapters in the thesis and/or in the associated lab notebooks by date and file name information.

The raw electrochemical data includes cyclic voltammetry, chronoamperometry and chronopotentiometry in the form of text files which may be imported and analysed using standard graphing software such as OriginLab or Microsoft Excel.

This ReadMe file briefly describes the information contained in the folder names and file names, and a summary of the experimental data in each folder.



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The dataset for Chapter 3 contains the following:



FOLDER NAME FORMAT:

electrode__experiment__description


SUBFOLDER NAME FORMAT:

date (yymmdd)__electrolyte__details


FILE NAME FORMAT:

date (yymmdd)__electrode__electrolyte__concentration__gas__experiment__details



CONTENT OF FOLDERS:

	Window opening folders:

 - ORR CVs (O2) and background CVs (N2) with increasing upper limit (EUR) at 20 mV s-1.
 - CVs (N2) with increasing EUR at 100mV s-1.


	Oxide stability at lower E folder:

 - LSVs (N2) after holding at potential "OxForm".
 - LSVs (N2) after holding at potential "OxForm" followed by a lower potential "ELow".


	OCP with RHE and MMS folder:

 - OCP transients (N2) with RHE and MMS used as RE.


	OCP as a function of initial potential in oxide region folder:

 - A - Conditioning CV before experiment for each "E oxide" (N2 and O2).
 - B - Potential hold at each "E oxide" (N2 and O2).
 - C - LSV after holding at "E oxide" to quantify oxide formed (N2 and O2).

 - D - Conditioning CV before next experiment for each "E oxide" (N2 and O2).
 - E - Potential hold at each "E oxide" (N2 and O2).
 - F - OCP transient (N2 and O2).


	Oxygen concentration and mass transport folder:

 - ORR curves in air and O2 saturated electrolyte, with varying rotation rates.
 - OCP transients in air and O2 saturated electrolyte, with varying rotation rates.


	LSV after resting at OCP for different times folder:

 OCP results:
 - Conditioning CVs before experiments for each time at OCP (O2).
 - OCP transients for different times (O2).
 - Negative-goining LSV after resting for each time at OCP (O2).

Background results:
 - Conditioning CVs before experiments for each potential hold (N2 and O2).
 - Potential holds (N2 and O2).
 - Negative-goining LSV after each potential hold (N2 and O2).


	Leakage current folder:

 - OCP transients in air and N2 saturated HClO4 sampled at high frequence to measure any current leakage during rest measurements.


	Gold OCP and CV folder:

 - CVs at different scan rates and rotation rates in N2 and O2 saturated electrolyte.
 - OCP transients in N2 and O2 saturated electrolytes.



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The dataset for Chapters 4 and 5 contains the following



FOLDER NAME FORMAT:

date (yymmdd)__electrode__electrolyte__experiment description__gas



FILE NAME FORMAT:

date (yymmdd)__electrode__electrolyte__concentration__gas__scan rate__experiment__details



CONTENT OF FOLDERS:

	Experimental folder:
	(details in thesis chapter 2)

 - Microelectrode characterization in ruthenium hexamine.
 - Microelectrode characterization in aqueous alkaline electrolyte.
 - Preparation of polypyrrole RE by electrodeposition CV.
 - Images of cell set up, polypyrrole RE, and microscope images of the electrodes.



	Aqueous NaOH and KOH folder:
	(details in thesis chapter 4)

 - Background CVs (Ar) and ORR CVs (O2) with addition of DMSO.



	DMSO with TBA+ folder:
	(details in thesis chapter 4)

 - Includes a file for CV with ferrocenemethanol (FcMeOH) for each different set experiments to allow correction of potential.
 - Background CVs (Ar) and ORR CVs (O2) with addition of water.
 - CVs at different scan rates in Ar purged electrolyte.

Notes: Water volume in the file name is converted to concentration as detailed in the thesis.


	DMSO with K+ and Na+ folder:
	(details in thesis chapter 5)

 - Includes a file for CV with ferrocenemethanol (FcMeOH) for each different set experiments to allow correction of potential.
 - Background CVs (Ar) with addition of water.
 - ORR CVs (O2) with addition of water. 

Notes: Water volume in the file name is converted to concentration as detailed in the thesis.
The first scan and final scan are given in the results in O2, but only the final scan was used in the thesis.



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Date of data collection: 28/09/2016 to 16/10/2020

Licence: CC-BY

Date that the file was created: May, 2021