Imam Mohammad Ibn Saud Islamic University

Mohamed Khairy Omran

Babiker Yagoub Elhadi Abdulkhair

Mohamed Nady Abd El-Hameed Ibrahim

Faisal K Algethami

A method of hydrogen generation may include contacting sodium borohydride (NaBH) and water in the presence of a catalyst including a nanocomposite comprising graphitic CN, MO, and MgAlOin a mass relationship to each other in a range of from 5 to 15:2 to 7:75 to 95, at a temperature in a range of from 10 to 80° C., thereby catalyzing the hydrogen generation at a hydrogen generation rate in a range of from 2750 to 6000 mL/(min·g).

Nanocomposite for hydrogen generation

A method of producing hydrogen comprising hydrolyzing sodium borohydride (NaBH) with water at a temperature of from about 20 to about 75° C. in the presence of a particulate crystalline nanocomposite catalyst, wherein the ratio by weight of sodium borohydride to the particulate crystalline nanocomposite catalyst is from about 1:1 to about 5:1. The particulate crystalline nanocomposite catalyst comprises: a monoclinic BiOcrystalline phase; a CaSiOcrystalline phase; and, a graphitic-CNcrystalline phase, wherein at least a fraction of the graphitic-CNis in the form of mesoporous nanosheets.

Method of producing hydrogen gas using nanocomposite catalyst

A method of producing hydrogen gas comprising hydrolyzing sodium borohydride (NaBH) with water at a temperature of from about 20° C. to about 75° C. in the presence of a particulate crystalline nanocomposite catalyst, where the ratio by weight of NaBHto the particulate crystalline nanocomposite catalyst is from about 1:1 to about 5:1. The particulate crystalline nanocomposite catalyst comprises a calcium hydrogen phosphate (CaHPO) crystalline phase, a calcium silicate hydroxide [CaSiO(OH)] crystalline phase, a silicon oxide (SiO) crystalline phase, graphitic carbon nitride (CN) crystalline phase, wherein at least a fraction of the graphitic-CNis in the form of mesoporous nanosheets.

A method of generating hydrogen includes contacting a graphite-phase carbon nitride, calcium metavanadate and calcium silicate (CaVO@CaSiO@g-CN) nanocomposite with sodium borohydride (NaBH) in water and hydrolyzing the sodium borohydride to generate hydrogen.

Method of hydrogen generation through sodium borohydride hydrolysis using CaVO@CaSiO@g-CNnanocomposite

A method of hydrogen generation includes contacting sodium borohydride (NaBH) and water in the presence of a nanocomposite comprising graphitic CN, VO, and MgAlOin a mass relationship to each other in a range of from 5 to 15:2 to 7:75 to 95, at a temperature in a range of from 10 to 80° C., thereby catalyzing the hydrogen generation at a hydrogen generation rate in a range of from 2000 to 5000 mL/(min·g).

Nanocomposite of graphitic CN, VO, and MgAlOfor hydrogen generation

A method of generating hydrogen includes reacting sodium borohydride with water in the presence of a Cu(OH)NO/CaSiO/g-CNnanocomposite to hydrolyze sodium borohydride and generate hydrogen. The nanocomposite used is fabricated by mixing CaSiO, g-CN, and a copper salt in a glycol solvent to form a mixture and further microwaving the mixture to obtain the Cu(OH)NO/CaSiO/g-CNnanocomposite.

Method for hydrogen generation using nanocomposite

A method of producing hydrogen gas comprising hydrolyzing sodium borohydride (NaBH) with water at a temperature of about 20 to 75° C. in the presence of a particulate crystalline nanocomposite catalyst, wherein the ratio by weight of NaBHto the particulate crystalline nanocomposite catalyst is from about 1:1 to about 5:1. The particulate crystalline nanocomposite catalyst comprises: a tetragonal calcium molybdate (CaMoO) crystalline phase; a calcium silicate (CaSiO) crystalline phase; and, a graphitic carbon nitride (g-CN) crystalline phase, wherein at least a fraction of the g-CNis in the form of mesoporous nanosheets.

A method of hydrogen generation from sodium borohydride (NaBH) using zirconium dioxide/calcium silicate/graphitic carbon nitride (ZrO/CaSiO/g-CN) based nanocomposite includes hydrolyzing NaBHin the presence of a ZrO/CaSiO/g-CNnanocomposite material, where the NaBHreacts with water to form hydrogen (H) gas in the presence of the ZrO/CaSiO/g-CNnanocomposite material as a catalyst. Further, the ZrO/CaSiO/g-CNnanocomposite material includes spherical metal oxide nanoparticles including a ZrOphase and a CaSiOphase dispersed on a matrix of g-CNnanosheets, where the spherical metal oxide nanoparticles have an average particle diameter in a range from 3 to 18 nm. Still further, the hydrolyzing proceeds with a hydrogen generation rate of greater than or equal to 200 mL·min·g.

Hydrogen generation method using sodium borohydride

A method for hydrogen (H) generation includes contacting a graphite-phase carbon nitride cobalt oxide and magnesium aluminum oxide nanocomposite (g-CN@CoO/MgAlO) with sodium borohydride (NaBH) in water (HO) and hydrolyzing the sodium borohydride to generate hydrogen. The g-CN@CoO/MgAlOnanocomposite comprises a graphite-phase carbon nitride (g-CN) in an amount of 5 to 15 percent by weight (wt. %), cobalt oxide in an amount of 1 to 10 wt. %, and magnesium aluminum oxide (MgAlO) in an amount of 75 to 95 wt. % based on a total weight of the g-CN@CoO/MgAlOnanocomposite.

g-CN@CoO/MgAlOnanocomposite for hydrogen generation

A method for hydrogen (H) generation includes reacting sodium borohydride (NaBH) with water in the presence of a graphite-phase carbon nitride copper oxide and magnesium aluminum oxide (g-CN@CuO/MgAlO) nanocomposite to hydrolyze the sodium borohydride and generate hydrogen. The g-CN@CuO/MgAlOnanocomposite comprises a graphite-phase carbon nitride (g-CN) in an amount of 5 to 15 percent by weight (wt. %), copper oxide in an amount of 3 to 7 wt. %, and magnesium aluminum oxide (MgAlO) in an amount of 80 to 90 wt. % based on a total weight of the g-CN@CuO/MgAlOnanocomposite.

g-CN@CuO/MgAlOnanocomposite synthesis for hydrogen generation

A method of hydrogen generation may include contacting sodium borohydride (NaBH) and a nanocomposite comprising graphitic CN, MnO, and MgAlOin a mass relationship to each other in a range of from 5 to 15:2 to 7:75 to 95, at a temperature in a range of from 10 to 80° C., thereby catalyzing the hydrogen generation at a hydrogen generation rate in a range of from 2000 to 5000 mL/(min·g).

Nanocomposite of graphitic CN, MnO, and MgAlOfor hydrogen generation

A method of hydrogen (H) generation includes hydrolyzing a borohydride salt in an aqueous solution including a catalyst to form gaseous hydrogen. The catalyst is a bismuth(III) oxide-doped silicon dioxide with an amount of bismuth(III) oxide from 2 wt. % to 12 wt. % based on a total weight of the bismuth(III) oxide-doped silicon dioxide. The bismuth(III) oxide is dispersed in silicon dioxide in the catalyst. The weight ratio of the catalyst to the borohydride salt present in the aqueous solution is from 0.1:2 to 7:1 and a rate of hydrolysis of the borohydride salt in the presence of the catalyst is 2 to 3 times greater than a rate of hydrolysis of the borohydride salt in the absence of the catalyst.

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Riyadh, Saudi Arabia

Mohamed Khairy Omran