公开(公告)号：US20240048073A1

公开(公告)日：2024-02-08

申请号：US18067893

申请日：2022-12-19

Applicant: Postech Research and Business Development Foundation

Inventor： Kijung YONG ,  Soyeon YUN

IPC: H02N1/04 ,  F16N99/00

CPC classification number: H02N1/04 ,  F16N99/00 ,  F16N2210/20 ,  F16N2270/00

Abstract: Proposed are triboelectric generator using a lubricant-infused surface controlled by a magnetic field and a manufacturing method thereof. The triboelectric generator 10 includes a substrate 100, an electrode unit 200 positioned on the substrate 100 and including a first electrode 210 and a second electrode 220, a stabilization layer 300 positioned on the substrate 100 and the electrode unit 200 and including a first elastic polymer 310, and a magneto-controllable unit 400 positioned on the stabilization layer 300 and including a lubricant 420 and a plurality of protrusion-shaped microcomposites 410, in which the microcomposite includes a magnetic material 411 and a second elastic polymer 412. The protrusion-shaped microcomposite is partially immersed in the lubricant, improves power generation efficiency, and can perform reversible switching according to the direction of the magnetic field.

公开(公告)号：US20230002922A1

公开(公告)日：2023-01-05

申请号：US17854075

申请日：2022-06-30

Applicant: S-Oil Corporation ,  POSTECH Research and Business Development Foundation

Inventor： Sangcheol PAIK ,  Kijung YONG ,  Hyogyun ROH

IPC: C25B11/075 ,  C25B1/04 ,  C25B11/061

Abstract: The present disclosure relates to a transition metal-doped nickel phosphide nanostructure, a method for preparing the same, and a catalyst for electrochemical water decomposition including the transition metal-doped nickel phosphide nanostructure. More specifically, a transition metal-doped nickel phosphide nanostructure can be prepared by converting a zinc oxide nanostructure grown on a substrate vertically by hydrothermal synthesis to a transition metal-doped nickel oxide nanostructure by cation exchange and then phosphorizing the nickel oxide. The transition metal-doped nickel phosphide nanostructure of the present disclosure is advantageous in that it has superior catalytic activity and conductivity due to large surface area. In addition, when used as a catalyst for water decomposition under an alkaline condition, it has a low overvoltage and can have excellent catalytic activity for hydrogen evolution reaction or oxygen evolution reaction.

公开(公告)号：US20230398530A1

公开(公告)日：2023-12-14

申请号：US18068011

申请日：2022-12-19

Applicant: POSTECH Research and Business Development Foundation

Inventor： Kijung YONG ,  Hyun Sik MOON

IPC: B01J35/00 ,  B01J21/18 ,  B01J23/46 ,  B01J37/16 ,  B01J37/12 ,  B01J21/06

CPC classification number: B01J35/004 ,  B01J21/18 ,  B01J23/468 ,  B01J37/16 ,  B01J37/12 ,  B01J21/06 ,  B01J2523/41 ,  B01J2523/47 ,  B01J2523/828 ,  B01J2523/827

Abstract: Proposed are a water-splitting hydrogen production photocatalyst including spatially separated cocatalysts and a method of preparing the same. The photocatalyst is shaped to be hollow. The photocatalyst includes a first cocatalyst core containing a first cocatalyst, a catalyst layer positioned on the first cocatalyst core and containing a first catalyst and a second catalyst, and a second cocatalyst layer positioned on the catalyst layer and containing a second cocatalyst. The photocatalyst exhibits excellent hydrogen production efficiency and charge transfer efficiency.

公开(公告)号：US20230002921A1

公开(公告)日：2023-01-05

申请号：US17545412

申请日：2021-12-08

Applicant: S-Oil Corporation ,  POSTECH Research and Business Development Foundation

Inventor： Sang Cheol PAIK ,  Kijung YONG ,  Dokyoung KIM

IPC: C25B11/031 ,  C25B1/04 ,  C25B11/053 ,  C25B11/061 ,  C25B11/091 ,  C23C14/08 ,  C23C14/24 ,  C23C28/04 ,  C25D9/08

Abstract: A coral reef-like nickel phosphide-tungsten oxide nanocomposite is disclosed. The coral reef-like nickel phosphide-tungsten oxide nanocomposite has a structure in which algae-like transition metal-doped nickel phosphide nanosheets are deposited on coral-like tungsten oxide nanostructures grown vertically on a substrate. This structure allows the coral reef-like nickel phosphide-tungsten oxide nanocomposite to have a large surface area, which leads to a significant increase in the number of catalytic active sites, and ensures high conductivity and electrochemical stability of the coral reef-like nickel phosphide-tungsten oxide nanocomposite. Due to these advantages, the coral reef-like nickel phosphide-tungsten oxide nanocomposite has a low overpotential and superior hydrogen evolution reaction or oxygen evolution reaction efficiency when applied to a water splitting catalyst under alkaline conditions. Also disclosed are a method for preparing the coral reef-like nickel phosphide-tungsten oxide nanocomposite and a catalyst for electrochemical water splitting including the coral reef-like nickel phosphide-tungsten oxide nanocomposite.