公开(公告)号：US20200370189A1

公开(公告)日：2020-11-26

申请号：US16418552

申请日：2019-05-21

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Muhammad Ali EHSAN ,  Khurram Saleem Joya

IPC: C25B11/04 ,  C25B1/04

Abstract: Catalytic materials useful, e.g., in water oxidation performing at low overpotential and/or stable for applications such as solar-to-fuel conversion systems may include nanoscale, nanoporous Pd-containing materials. Thin-film Pd electrocatalysts may be obtained via Aerosol-Assisted Chemical Vapor Deposition (AACVD) on conducting surfaces. XRD and XPS analyses show a phase pure crystalline metallic Pd deposit. Surface morphology study reveals a nanoparticulate highly porous nanostructure. Under electrochemical conditions, such Pd electrocatalysts may conduct water oxidation at onset potentials starting around 1.43 V against a reversible hydrogen electrode (η of 200 mV, Tafel slope of 40 mV/dec), and/or may achieve around 100 mA/cm2 current density at 1.63 V against a reversible hydrogen electrode, and may exhibits long-term stability in oxygen evolution. Method of making such electrocatalysts and their uses are also provided.

公开(公告)号：US20250043392A1

公开(公告)日：2025-02-06

申请号：US18363421

申请日：2023-08-01

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Abbas Saeed HAKEEM ,  Muhammad Ali EHSAN ,  Hafiz Muzammil IRSHAD ,  Bilal Anjum AHMED

IPC: C22C1/05 ,  B22F3/10 ,  C04B35/5831 ,  C04B35/626 ,  C04B35/645 ,  C22C21/00 ,  C22C26/00

Abstract: A method of making an aluminum-cubic boron nitride (Al-cBN) composite includes mixing an aluminum powder and particles of cubic boron nitride (cBN) in a solvent and sonicating to form an Al-cBN mixture; drying the Al-cBN mixture to form a dried mixture powder; and sintering by pressing and heating the dried mixture powder to form the Al-cBN composite. The aluminum powder has an average particle size of 10 to 100 micrometers (μm). The cBN particles have an average particle size of from 10 to 100 μm, and are uniformly dispersed throughout the Al-cBN composite.

公开(公告)号：US20240003023A1

公开(公告)日：2024-01-04

申请号：US18146144

申请日：2022-12-23

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Abdul REHMAN ,  Abbas Hakeem SAEED ,  Muhammad Ali EHSAN

IPC: C25B11/073 ,  C01G31/00 ,  C25B1/04 ,  C01G51/00 ,  H01M4/525 ,  H01M4/485

CPC classification number: C25B11/073 ,  C01G31/006 ,  C25B1/04 ,  C01G51/42 ,  H01M4/525 ,  H01M4/485

Abstract: A CoVOx composite electrode and method of making is described. The composite electrode comprises a substrate with an average 0.5-5 μm thick layer of CoVOx having pores with average diameters of 2-200 nm. The method of making the composite electrode involves contacting the substrate with an aerosol comprising a solvent, a cobalt complex, and a vanadium complex. The CoVOx composite electrode is capable of being used in an electrochemical cell for water oxidation.

公开(公告)号：US20230407497A1

公开(公告)日：2023-12-21

申请号：US17844439

申请日：2022-06-20

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Muhammad Ali EHSAN ,  Abbas Saeed HAKEEM

IPC: C25B11/052 ,  C23C16/448 ,  C23C16/30 ,  C25B1/04 ,  C25B11/075 ,  C25B11/065 ,  C25B11/061 ,  C25B11/031

CPC classification number: C25B11/052 ,  C23C16/4486 ,  C23C16/305 ,  C25B1/04 ,  C25B11/075 ,  C25B11/065 ,  C25B11/061 ,  C25B11/031

Abstract: An aerosol-assisted chemical vapor-deposition (AACVD) method of making nickel sulfide (NiS) nanowires. The method includes depositing a nickel carbamate compound onto a conductive support by an AACVD technique to form nickel sulfide (NiS) nanowires on the conductive support, where the nanowires are present directly on a surface of the conductive support. The NiS electrode prepared by the process of the present disclosure showed excellent OER activity in 1.0 M KOH solution, with a low Tafel value (60 mV dec−1) and good OER stability. The NiS nanowires, as prepared, can be used in energy conversion devices such as batteries, fuel cells, and supercapacitors.

公开(公告)号：US20230295817A1

公开(公告)日：2023-09-21

申请号：US18134325

申请日：2023-04-13

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Muhammad Ali EHSAN ,  Md. Abdul AZIZ ,  Abbas Saeed HAKEEM

IPC: C25B11/091 ,  C25B1/04 ,  B01J23/75 ,  B01J37/02 ,  B01J35/00 ,  C25B11/051 ,  C25B11/057

CPC classification number: C25B11/091 ,  B01J23/75 ,  B01J35/0033 ,  B01J37/0244 ,  C25B1/04 ,  C25B11/051 ,  C25B11/057 ,  C23C16/405

Abstract: A synthetic methodology for robust, nanostructured films of cobalt oxide over metal evaporated gold or similar material layer of, e.g., 50 nm, directly onto glass or other substrates via aerosol assisted chemical vapor deposition (AACVD). This approach allows film growth rates in the range of, e.g., 0.8 nm/s, using a commercially available precursor, which is ~10-fold the rate of electrochemical synthetic routes. Thus, 250 nm thick cobalt oxide films may be generated in only 5 minutes of deposition time. The water oxidation reaction for such films may start at ~0.6 V vs Ag/AgCl with current density of 10 mA/cm2 and is achieved at ~0.75 V corresponding to an overpotential of 484 mV. This current density is further increased to 60 mA/cm2 at ~1.5 V (vs Ag/AgCl). Electrochemically active surface area (ECSA) calculations indicate that the synergy between a Au-film, acting as electron sink, and the cobalt oxide film(s), acting as catalytic layer(s), are more pronounced than the surface area effects.

公开(公告)号：US20210032521A1

公开(公告)日：2021-02-04

申请号：US16527807

申请日：2019-07-31

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Abbas Saeed HAKEEM ,  Akolade Idris BAKARE ,  Muhammad Ali EHSAN

IPC: C09K5/14 ,  C04B35/117 ,  C04B35/64

Abstract: A method for making ceramic composites via sintering a mixture of alumina and oil fly ash. The alumina is in the form of nanoparticles and/or microparticles. The oil fly ash may be treated with an acid prior to the sintering. The composite may comprise graphite carbon derived from oil fly ash dispersed in an alumina matrix. The density, mechanical performance (e.g. Vickers hardness, fracture toughness), and thermal properties (e.g. thermal expansion, thermal conductivity) of the ceramic composites prepared by the method are also specified.

公开(公告)号：US20210032105A1

公开(公告)日：2021-02-04

申请号：US16530369

申请日：2019-08-02

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Abbas Saeed HAKEEM ,  Anwar UL-HAMID ,  Oki MURAZA ,  Muhammad Ali EHSAN

IPC: C01B21/082

Abstract: A method of making a β-SiAlON is described in involves mixing nanoparticles of AlN, Al2O3, and SiO2 with particles of Si3N4 and spark plasma sintering the mixture. The sintering may be at a temperature of 1450-1600° C. or about 1500° C. The particles of Si3N4 may be nanoparticles comprising amorphous Si3N4, or 25-55 μm diameter microparticles comprising β-Si3N4.

公开(公告)号：US20200381186A1

公开(公告)日：2020-12-03

申请号：US16425621

申请日：2019-05-29

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Muhammad Ali EHSAN ,  Abdul REHMAN ,  Abbas Saeed HAKEEM

IPC: H01G9/20 ,  H01G9/00 ,  C23C16/06 ,  C23C16/448 ,  C03C17/09

Abstract: Platinum films can be obtained by AACVD using a class of Pt-dialkyldithiocarbamates complexes, of the formula Pt(S2CNR2), wherein R is independently alkyl, such as isobutyl, aryl, or alkaryl, such as benzyl, particularly as single source precursors. The catalytic performance of the resulting Pt-films allows their use as counter electrodes in dye sensitized solar cells, for example. The efficiency of the AACVD-produced electrodes can be better than a conventionally used Pt-counter electrodes made by the doctor blade's method. The Pt(S2CNR2)-derived films have well connected and defect free surface topography and better catalytic performance, likely due to their high conductivity and reflectivity. A simple and low cost method employing such dithiocarbamate precursors can generate Pt-films and electrodes of broad applicability.

公开(公告)号：US20240271300A1

公开(公告)日：2024-08-15

申请号：US18607276

申请日：2024-03-15

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Abdul REHMAN ,  Abbas Hakeem SAEED ,  Muhammad Ali EHSAN

IPC: C25B11/073 ,  C01G31/00 ,  C01G51/00 ,  C25B1/04 ,  H01M4/485 ,  H01M4/525

CPC classification number: C25B11/073 ,  C01G31/006 ,  C01G51/42 ,  C25B1/04 ,  H01M4/485 ,  H01M4/525

Abstract: A CoVOx composite electrode and method of making is described. The composite electrode comprises a substrate with an average 0.5-5 μm thick layer of CoVOx having pores with average diameters of 2-200 nm. The method of making the composite electrode involves contacting the substrate with an aerosol comprising a solvent, a cobalt complex, and a vanadium complex. The CoVOx composite electrode is capable of being used in an electrochemical cell for water oxidation.

公开(公告)号：US20240209526A1

公开(公告)日：2024-06-27

申请号：US18085629

申请日：2022-12-21

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Muhammad Ali EHSAN

IPC: C25B11/077 ,  C25B1/04 ,  C25B11/031 ,  C25B11/061

CPC classification number: C25B11/077 ,  C25B1/04 ,  C25B11/031 ,  C25B11/061

Abstract: An electrocatalyst including an iron foam substrate and magnetite (Fe3O4). At least one layer of the Fe3O4 is deposited onto the iron foam substrate. At least one layer of the Fe3O4 on the iron foam substrate is continuous. At least one layer of the Fe3O4 on the iron foam substrate has a thickness of 0.01 micrometer (μm) to 50 μm. The Fe3O4 is in a form of particles having a spherical shape with an average diameter of 0.01 to 2 μm.