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Sodium hydrogen citrate

Manufactured by Merck Group
Sourced in United States

Sodium hydrogen citrate is a chemical compound used in various laboratory applications. It is a salt of citric acid and sodium, commonly known as sodium citrate. This compound serves as a buffering agent, maintaining a specific pH level in aqueous solutions.

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3 protocols using sodium hydrogen citrate

1

Bimetallic Catalyst Synthesis Protocol

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Tin chloride (SnCl2; 98%, Sigma-Aldrich), Palladium chloride (PdCl2; 99.8%, Sigma-Aldrich), nickel chloride hexahydrate (NiCl2.6H2O; 98%, Merck), tri-sodium citrate di-hydrate (Na3C6H5O7.2H2O; 98%, Merck), ammonium chloride (NH4Cl; 97%, Merck), sodium hypophosphite (NaH2PO2; 95%, Merck), aqueous ammonia solution (aq.NH3; 27 wt%, Merck), nickel nitrate hexahydrate (Ni(NO3)2.6H2O; 98%, Merck), iron nitrate nonahydrate (Fe(NO3)3; 98%, Merck), nickel sulfate hexahydrate (NiSO4.6H2O; 98%, Merck), ammonium molybdate ((NH4)6Mo7O24; 97%, Merck), sodium chloride (NaCl; 99%, Merck), Potassium Hydroxide pellets (KOH; 97%, Merck), hydrochloric acid (HCl; ~35%, Merck), sodium hydrogen citrate (Na2C6H6O7; 98%, Merck), potassium hexachloroiridate (K2IrCl6; 99%, Sigma-Aldrich), Pt/C (40 wt%, Sigma-Aldrich) and Ni-foam (Marketech International, USA) were used without further purification.
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2

Electrochemical Synthesis of Metal Catalysts

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Cu mesh, Ni foam (Alfa Aesar, 0.11 mm), nickel(ii) sulphate heptahydrate (Ni(SO4)2·7H2O; Merck, ≥98%), potassium hydrogen carbonate (KHCO3; Merck, ≥99.5%), ammonium persulphate (Lobachemie, ≥98%), ammonia solution (Merck, ≥25%), nickel(ii) chloride hexahydrate (NiCl2·6H2O; Merck, ≥99%), sodium hydroxide (NaOH; Merck, ≥97%), potassium hydroxide pellets (KOH; Merck, ≥85%), ethanol (C2H5OH; Merck ≥99.9%), Toray carbon fiber paper (CFP; Alfa Aesar), carbon cloth (Alfa Aesar), commercial Pt/C (20 wt%, Merck), ruthenium oxide (RuO2; Merck), ammonium heptamolybdate tetrahydrate ((NH4)6Mo7O24·4H2O; 97%, Merck), sodium chloride (NaCl; 99%, Merck), sodium hydrogen citrate (Na2C6H6O7; 98%, Merck), nickel nitrate hexahydrate (Ni(NO3)2·6H2O; 98%, Merck), iron nitrate nonahydrate (Fe(NO3)3·9H2O; 98%, Merck), were used without further purification, except for Ni foam and Cu mesh.
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3

Synthesis and Characterization of Electrode Materials

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Cu mesh (Alfa Aesar, 0.11 mm), cobalt(ii) sulphate heptahydrate (Co(SO4)2, 7H2O; Merck, ≥98%), nickel(ii) sulphate heptahydrate (Ni(SO4)2, 7H2O; Merck, ≥98%), potassium hydrogen carbonate (KHCO3; Merck, ≥99.5%), ammonium per-sulphate solution (Lobachemie, ≥98%) ammonia solution (Merck, ≥25%), nickel(ii) chloride hexahydrate (NiCl2·6H2O; Merck, ≥99%), chromium(iii) chloride hexahydrate (CrCl3·6H2O; Merck, ≥96%), manganese(ii) chloride tetrahydrate (MnCl2·4H2O; Merck, ≥96%), sodium hydroxide (NaOH; Merck, ≥97%), sodium dodecyl sulphate (SDS; Merck, ≥98%), potassium hydroxide pellets (KOH; Merck, ≥85%), ethanol (C2H5OH; Merck ≥99.9%), Toray carbon fiber paper (CFP; Alfa Aesar), commercial Pt/C (40 wt%, Merck), ammonium molybdate ((NH4)6Mo7O24; 97%, Merck), sodium chloride (NaCl; 99%, Merck), sodium hydrogen citrate (Na2C6H6O7; 98%, Merck), potassium hexachloroiridate (K2IrCl6; 99%, Sigma-Aldrich), nickel nitrate hexahydrate (Ni(NO3)2·6H2O; 98%, Merck), iron nitrate nonahydrate (Fe(NO3)3·9H2O; 98%, Merck) and Nafion perfluorinated resin solution (5 wt%, Merck) were used without further purification.
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