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Emprove exp h2so4

Manufactured by Merck Group

Emprove exp)/H2SO4 is a laboratory equipment product manufactured by Merck Group. It is a concentrated sulfuric acid (H2SO4) solution designed for use in various scientific and industrial applications. The core function of this product is to provide a consistent and reliable source of sulfuric acid for analytical, purification, and other laboratory procedures.

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2 protocols using emprove exp h2so4

1

Cleaning Electrochemical Cell with Piranha Solution

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Milli-Q water (resistivity >18.2 MΩ·cm,
TOC < 5 ppb) was used for all experiments in this work. Prior to
each experiment, all cell compartments were cleaned by soaking in
an aqueous solution of 1 g·L–1 KMnO4 (Fluka, ACS reagent) and 0.5 M H2SO4 (Fluka,
ACS reagent) overnight. The solution was subsequently drained, and
the cell compartments were rinsed with a dilute piranha solution (1:3
v/v of H2O2 (Merck, Emprove exp)/H2SO4) to remove residual KMnO4 and MnOx. Afterward,
the cell compartments were cleaned by repetitively rinsing and boiling
with Milli-Q water to remove all inorganic contaminants.
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2

Ultrapure Water Cleaning Procedure

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Ultrapure water (resistivity
> 18.2 MΩ·cm, Millipore Milli-Q) was used for all experiments
in this work. Prior to each experiment, all cell compartments were
cleaned by storing them in a potassium permanganate solution (1 g
L–1 KMnO4 (Fluka, ACS reagent) in 0.5
M H2SO4 (Fluka, ACS reagent)) overnight. The
solution was subsequently drained, and the cell compartments were
rinsed with a dilute piranha solution (1:3 v/v of H2O2 (Merck, Emprove exp)/H2SO4) to remove
residual KMnO4 and MnOx. Afterward,
the cell compartments were cleaned by repetitively rinsing and boiling
with Milli-Q water to remove all inorganic contaminants. Electrolytes
were prepared from LiClO4 (Sigma-Aldrich, ≥99.99%
trace metal basis), NaClO4 (Sigma-Aldrich, ≥99.99%
trace metal basis), KClO4 (Sigma-Aldrich, ≥99.99%
trace metal basis), NaClO4 (Sigma-Aldrich, ≥99.99%
trace metal basis), H2SO4 (Merck, Suprapur,
96%), PdSO4 (Sigma-Aldrich, 99.99% trace metal basis),
and HClO4 (Sigma-Aldrich, Ultrapure, 70%). In this work,
a Pt wire (0.5 mm diameter, MaTecK, 99.9%) was used as the counter
electrode, a reversible hydrogen electrode (RHE) was used as the reference
electrode, and all of the potentials were corrected for ohmic drop
and controlled with an Autolab PGSTAT302N potentiostat.
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