US 12,281,396 B1
Electrocatalytic water splitting using α-Ag2WO4@Mn3O4 nanocomposites
Mohamed Khairy Abdel Fattah Omran, Riyadh (SA); Mohamed Mokhtar Mohamed, Benha (EG); Samar Mohamed Syam, Benha (EG); and Babiker yagoub Elhadi Abdulkhair, Riyadh (SA)
Assigned to IMAM MOHAMMAD IBN SAUD ISLAMIC UNIVERSITY, Riyadh (SA)
Filed by IMAM MOHAMMAD IBN SAUD ISLAMIC UNIVERSITY, Riyadh (SA)
Filed on Nov. 26, 2024, as Appl. No. 18/959,790.
Int. Cl. C25B 1/04 (2021.01); C25B 11/037 (2021.01); C25B 11/067 (2021.01); C25B 11/091 (2021.01)
CPC C25B 1/04 (2013.01) [C25B 11/037 (2021.01); C25B 11/067 (2021.01); C25B 11/091 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A method of producing hydrogen gas by a hydrogen evolution reaction, the method comprising:
contacting an electrocatalyst with an aqueous electrolyte solution comprising a hydroxide base;
applying a potential of −300 to −1 mV vs RHE to the electrocatalyst and a counter electrode immersed in the aqueous electrolyte solution, wherein
the electrocatalyst comprises
manganese oxide nanoparticles, and
silver-containing nanoparticles disposed on the manganese oxide nanoparticles, the silver-containing nanoparticles include a shell of Ag2WO4 disposed on a core of Ag; and
the electrocatalyst has
an electrical resistivity of 0.50×107 to 6.0×107Ω,
a charge transfer resistance of 325 to 450Ω,
a Tafel slope of 55 to 125 mV/dec, and
an overpotential at 10 mA/cm2 of 0.05 to 200 mV.