Tetramethylammonium hydroxide pentahydrate

Manufactured by Thermo Fisher Scientific

Tetramethylammonium hydroxide pentahydrate is a chemical compound with the formula (CH3)4NOH·5H2O. It is a colorless, crystalline solid that is soluble in water and alcohol. The compound serves as a source of the tetramethylammonium cation and hydroxide ion.

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2 protocols using tetramethylammonium hydroxide pentahydrate

Synthesis of Perovskite-Based Electrocatalysts

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All chemicals were used as they were received from manufacturers. Lanthanum(III) nitrate hexahydrate (99.995%), strontium(II) nitrate hexahydrate (99%), nickel(II) nitrate hexahydrate (99%), iron(III) nitrate non-ahydrate (99.99%), tetramethylammonium hydroxide pentahydrate (TMAOH, 99%), diethylene glycol (DEG, 99.99%), citric acid monohydrate, 2-propanol, ethylenediaminetetraacetic acid, and potassium hydroxide (KOH) were purchased from Fisher Scientific. Absolute 200 proof ethanol was obtained from Aaper Alcohol. 5 wt % Nafion solution in lower alcohols and IrO₂ powder were obtained from Sigma-Aldrich. Millipore high-purity water (DI water, 18 MΩ) was used in all experiments and synthesis and research grade, 99.999% purity oxygen and argon gases were purchased from Praxair. Vulcan XC72 carbon (VC) was purchased from Cabot Corporation and ball-milled prior to use.

Forslund R.P., Hardin W.G., Rong X., Abakumov A.M., Filimonov D., Alexander C.T., Mefford J.T., Iyer H., Kolpak A.M., Johnston K.P, & Stevenson K.J. (2018). Exceptional electrocatalytic oxygen evolution via tunable charge transfer interactions in La0.5Sr1.5Ni1−xFexO4±δ Ruddlesden-Popper oxides. Nature Communications, 9, 3150.

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Synthesis of Perovskite Electrocatalysts

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All chemicals were used as received. Anhydrous ethanol and 5 wt% Nafion solution in lower alcohols were purchased from Sigma-Aldrich. Lanthanum (III) nitrate hexahydrate (99.999%), strontium (II) nitrate hexahydrate (99.9%), cobalt (II) nitrate hexahydrate (99.9%), tetrapropylammonium bromide (98%), tetramethylammonium hydroxide pentahydrate (99%), 2propanol, and potassium hydroxide were obtained from Fisher Scientific. Absolute ethanol (200 proof) was obtained from Aaper alcohol. Oxygen (99.999%) gas was obtained from Praxair. Vulcan carbon XC-72 (VC) was obtained from Cabot Corporation, and the nitrogen-doped carbon (NC) was prepared as reported elsewhere. 56 The LSCO series was synthesized according to the methods described in our previous papers. 25- 28

Mefford JT ., Kurilovich AA ., Saunders J ., Hardin WG ., Abakumov AM ., Forslund RP ., Bonnefont A ., Dai S ., Johnston KP , & Stevenson KJ . (2019). Decoupling the roles of carbon and metal oxides on the electrocatalytic reduction of oxygen on La_1-xSr_xCoO_3-δ perovskite composite electrodes. Physical chemistry chemical physics : PCCP, 21(6).

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