公开(公告)号：US10144993B2

公开(公告)日：2018-12-04

申请号：US14918486

申请日：2015-10-20

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Sung Jong Yoo ,  Jong Hyun Jang ,  Hyoung-Juhn Kim ,  Namgee Jung ,  Suk Woo Nam ,  Jonghee Han ,  Sung Pil Yoon ,  Jaeyune Ryu ,  Tae Hoon Lim ,  Jin Young Kim

IPC: C22C5/04

Abstract: Provided is a catalyst for oxygen reduction reaction comprising an alloy comprising at least one selected from Pt, Pd and Ir supported on a carbon carrier functionalized with poly(N-isopropylacrylamide) (PNIPAM). The catalyst for oxygen reduction reaction has electronic ensemble effects by virtue of the carbon carrier functionalized with poly(N-isopropylacrylamide) (PNIPAM), and thus shows improved oxygen reduction activity and durability as compared to conventional catalysts supported on carbon.

公开(公告)号：US10669640B2

公开(公告)日：2020-06-02

申请号：US15241798

申请日：2016-08-19

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jong Hyun Jang ,  Soo-Kil Kim ,  Sang Hyun Ahn ,  Hyoung-Juhn Kim ,  Jin Young Kim ,  Sung Jong Yoo ,  Dirk Henkensmeier ,  Jonghee Han ,  Jaeyune Ryu

IPC: C25B11/04 ,  C25B9/10 ,  C25B1/10 ,  C25D3/12 ,  C25D5/54 ,  C23C18/54

Abstract: Provided is an electrocatalyst for anion exchange membrane water electrolysis, including a carbonaceous material, and nickel electrodeposited on the carbonaceous material, wherein nickel is partially substituted with platinum and the substitution with platinum provides increased hydrogen evolution activity as compared to the same electrocatalyst before substitution with platinum. Also provided are a method for preparing the electrocatalyst and an anion exchange membrane water electrolyzer using the same. The nickel electrocatalyst coated with an ultralow loading amount of platinum for anion exchange membrane water electrolysis shows excellent hydrogen evolution activity and has a small thickness of catalyst, thereby providing high mass transfer and high catalyst availability. In addition, the electrocatalyst uses a particle-type electrode to facilitate emission of hydrogen bubbles generated during hydrogen evolution reaction and oxygen bubbles generated during oxygen evolution reaction, and requires low cost for preparation to provide high cost-efficiency.

公开(公告)号：US10601052B2

公开(公告)日：2020-03-24

申请号：US15360034

申请日：2016-11-23

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jong Hyun Jang ,  Byungseok Lee ,  Hee-Young Park ,  Hyoung-Juhn Kim ,  Dirk Henkensmeier ,  Sung Jong Yoo ,  Jin Young Kim ,  So Young Lee ,  Jaeyune Ryu ,  Sung Pil Yoon ,  Jonghee Han ,  Suk Woo Nam

IPC: H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/18

Abstract: Disclosed are a reversible fuel cell oxygen electrode in which IrO2 is electrodeposited and formed on a porous carbon material and platinum is applied thereon to form a porous platinum layer, a reversible fuel cell including the same, and a method for preparing the same. According to the corresponding reversible fuel cell oxygen electrode, as the loading amounts of IrO2 and platinum used in the reversible fuel cell oxygen electrode can be lowered, it is possible to exhibit excellent reversible fuel cell performances (excellent fuel cell performance and water electrolysis performance) by improving the mass transport of water and oxygen while being capable of reducing the loading amounts of IrO2 and platinum. Further, it is possible to exhibit a good activity of a catalyst when the present disclosure is applied to a reversible fuel cell oxygen electrode and to reduce corrosion of carbon.

公开(公告)号：US09751078B2

公开(公告)日：2017-09-05

申请号：US14921567

申请日：2015-10-23

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Sung Jong Yoo ,  Jaeyune Ryu ,  Jong Hyun Jang ,  Jin Young Kim ,  Hyoung-Juhn Kim ,  Sung Pil Yoon ,  Jonghee Han ,  Suk Woo Nam ,  Tae Hoon Lim

IPC: B01J27/185 ,  B01J35/06 ,  C25B11/03 ,  C25B11/04 ,  C25B1/02 ,  B82Y30/00

CPC classification number: B01J27/1853 ,  B01J23/75 ,  B01J35/06 ,  B82Y30/00 ,  C25B1/02 ,  C25B11/035 ,  C25B11/0405 ,  C25B11/0415 ,  C25B11/0447

Abstract: Disclosed is a non-precious metal based water electrolysis catalyst represented by CoX/C (X is at least one selected from the group consisting of P, O, B, S and N) for evolution of hydrogen and oxygen at a cathode and anode, respectively, at the same time, the catalyst including a cobalt-containing compound fixed to a carbon carrier.