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2 protocols using potassium hydroxide pellets koh

1

Synthesis of Pyrrole-based Materials

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Pyrrole monomer C4H5N (Py, +98%), ammonium persulfate (NH4)2S2O8 (APS, 98%), lead nitrate Pb(NO3)2 (99%), potassium hydroxide pellets KOH (85%), and sodium hydroxide pellets NaOH (98%) were purchased from Alfa Aesar, Karlsruhe, Germany. Hydrochloric acid HCl (~36%) and methanol (99.5%) were obtained from Fisher Chemical, Loughborough, U.K. All reagents were used as received without any further treatment. Deionized water was used throughout the experimental process.
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2

Synthesis of Metal Hexacyanoferrates

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All chemicals were used as received: potassium
hydroxide pellets (KOH, Alfa Aesar, 85%), hydrogen peroxide (H2O2, 30% (w/w) in H2O, contains stabilizer,
Sigma-Aldrich), sulfuric acid (H2SO4, 99.999%,
Sigma-Aldrich), hydrofluoric acid (HF, ACS reagent 48%, Sigma-Aldrich),
hydrochloric acid (HCl, reagent grade, 37%, Sigma-Aldrich), potassium
hexacyanoferrate(II) trihydrate (K4Fe(CN)6·3H2O, ≥99% puriss. p.a., ACS reagent, Sigma-Aldrich),
potassium hexacyanoferrate(III) (K3Fe(CN)6,
≥99% puriss. p.a., ACS reagent, Sigma-Aldrich). Water with
resistivity of 18.2 MΩ cm from Milli-Q integral ultrapure water
(Merck Millipore).
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