公开(公告)号：US10333151B2

公开(公告)日：2019-06-25

申请号：US15567435

申请日：2016-04-19

Applicant: N.E. CHEMCAT Corporation

Inventor： Yasuhiro Seki ,  Takuya Tsubaki ,  Hiroshi Igarashi

IPC: H01M4/92 ,  H01M4/88 ,  H01M8/1004 ,  H01M8/1018

Abstract: Provided is a method for producing a gas diffusion electrode, with which it is possible to more effectively improve electrode performance, in cases in which a core-shell catalyst is used as an electrode catalyst. This method for producing gas diffusion electrode comprises: a first step in which a support layer having electron conductivity, water-repellency and gas diffusion properties is soaked in water; a second step in which the constituent materials of ink for forming a catalyst layer are put into a mixer and mixed by agitation to prepare an ink for forming a catalyst layer; and a third step in which the ink for forming a catalyst layer is used to form a catalyst layer on the surface of the support layer obtained in the first step. The ink for forming the catalyst layer contains a core-shell catalyst, a polyelectrolyte, water and alcohol. The alcohol is only a polyvalent alcohol.

公开(公告)号：US10177395B2

公开(公告)日：2019-01-08

申请号：US15316929

申请日：2016-03-30

Applicant: N.E. CHEMCAT CORPORATION

Inventor： Kiyotaka Nagamori ,  Tomoteru Mizusaki ,  Yoko Nakamura ,  Hiroshi Igarashi ,  Yasuhiro Seki

IPC: H01M4/92 ,  H01M8/1004 ,  B01J23/44 ,  B01J35/08 ,  B01J37/02 ,  H01M4/86 ,  H01M4/88 ,  H01M8/1018

Abstract: To provide electrode catalyst (core-shell catalyst) having an excellent catalyst activity which contributes to lower the cost of the PEFC. The electrode catalyst has catalyst particles supported an a support. The catalyst particle has a core part containing simple Pd and a shell part containing simple Pt. A percentage RC (atom %) of the carbon of the support and a percentage RPd (atom %) of the simple Pd in an analytical region near a surface measured by X-ray photoelectron spectroscopy (XPS) satisfy the conditions of the following equation (1): 2.15≤[100×RPd/(RPd+RC)].

公开(公告)号：US20230369608A1

公开(公告)日：2023-11-16

申请号：US18028135

申请日：2021-09-28

Applicant: N.E. CHEMCAT CORPORATION

Inventor： Yasuhiro Seki ,  Kiyotaka Nagamori ,  Tomoteru Mizusaki ,  Satoshi Aoki ,  Yoko Nakamura ,  Makoto Nishibetto ,  Yuki Takii

IPC: H01M4/90 ,  H01M4/86 ,  H01M4/88 ,  H01M8/1004

CPC classification number: H01M4/9058 ,  H01M4/9083 ,  H01M4/8657 ,  H01M4/8807 ,  H01M4/9016 ,  H01M8/1004 ,  H01M4/8605

Abstract: The catalyst for electrodes comprises: a porous support which has nanopores having a pore diameter of from 1 nm to 20 nm and micropores having a pore diameter of less than 1 nm; and a plurality of catalyst particles which are supported by the support. The catalyst particles are supported by both inner portions and outer portions of mesopores of the support, and contain Pt (zerovalent). If an analysis of the particle size distribution of the catalyst particles is performed using three-dimensional reconstructed images obtained through a STEM-based electron tomography measurement, the condition of formula (S1), namely (100×(N10/N20)≤8.0) is satisfied, where N10 represents the number of noble metal particles that are not in contact with pores having a pore diameter of 1 nm or more; and N20 represents the number of catalyst particles that are supported by the inner portions of the nanopores of the support.

公开(公告)号：US20230335760A1

公开(公告)日：2023-10-19

申请号：US18026553

申请日：2021-09-28

Applicant: N.E. CHEMCAT CORPORATION

Inventor： Yasuhiro Seki ,  Tomoteru Mizusaki ,  Kiyotaka Nagamori ,  Satoshi Aoki ,  Makoto Nishibetto ,  Yoshiyuki Wada ,  Yoko Nakamura

IPC: H01M4/92 ,  H01M4/86 ,  H01M8/1004

CPC classification number: H01M4/926 ,  H01M4/8605 ,  H01M4/921 ,  H01M8/1004

Abstract: This catalyst for electrodes comprises: a porous carbon support which has nanopores having a pore diameter of from 1 nm to 20 nm; and a plurality of catalyst particles which are supported by the support. The catalyst particles contain Pt (zerovalent), and are supported by both inner portions and outer portions of the nanopores of the support. If an analysis of the particle size distribution of the catalyst particles is performed using three-dimensional reconstructed images obtained through a STEM-based electron tomography measurement, the proportion of the catalyst particles supported by the inner portions of the nanoparticles is 50% or more: at least one nanopore is formed in a cubic image having a side of from 20 nm to 50 nm, said cubic image being obtained from a three-dimensional reconstructed image of a catalyst aggregate; and this nanopore has the shape of a continuously extending interconnected pore.

公开(公告)号：US20230126404A1

公开(公告)日：2023-04-27

申请号：US17910153

申请日：2021-03-16

Applicant: N.E. CHEMCAT CORPORATION

Inventor： Yoshiyuki Wada ,  Tomoteru Mizusaki ,  Kiyotaka Nagamori ,  Satoshi Aoki ,  Hiroki Shiina ,  Yasuhiro Seki

IPC: H01M4/92 ,  H01M8/1004 ,  H01M4/86

Abstract: The present invention provides an electrode catalyst which has excellent catalytic activity, and which can contribute to reducing the cost of a polymer electrolyte fuel cell (PEFC). According to the present invention, an electrode catalyst includes a hollow carrier including nanopores having a pore size of 1 to 20 nm, and a plurality of catalyst particles. The catalyst particles are supported both inside and outside the nanopores of the carrier, and comprise (zero-valent) Pt, and when a particle size distribution analysis of the catalyst particles is carried out using a three-dimensional reconstructed image obtained by electron beam tomography measurement employing STEM, the conditions of formula (S1): 100×(N10/N20)≤8.0 are satisfied (in the formula, N10 is the number of noble metal particles not in contact with a pore having a pore size of 1 nm or more, and N20 is the number of catalyst particles supported inside the nanopores of the carrier).

公开(公告)号：US09893365B2

公开(公告)日：2018-02-13

申请号：US15102438

申请日：2015-08-27

Applicant: N.E. CHEMCAT Corporation

Inventor： Kiyotaka Nagamori ,  Tomoteru Mizusaki ,  Yoko Nakamura ,  Hiroshi Igarashi ,  Yasuhiro Seki

IPC: H01M4/92 ,  H01M4/86 ,  B01J27/22 ,  B01J35/08 ,  H01M4/90 ,  H01M8/1004 ,  H01M8/10 ,  H01M8/1018

CPC classification number: H01M4/8657 ,  B01J27/22 ,  B01J35/08 ,  H01M4/86 ,  H01M4/90 ,  H01M4/9016 ,  H01M4/9075 ,  H01M4/92 ,  H01M4/925 ,  H01M8/10 ,  H01M8/1004 ,  H01M2008/1095

Abstract: To provide electrode catalyst which has the catalyst activity and durability at a practically durable level and contributes to lowering of the cost in comparison with the conventional Pt/C catalyst. The electrode catalyst has a support and catalyst particles supported on the support. The catalyst particle has the core part, the first shell part formed on the core part, and the second shell part formed on the first shell part. The core part contains W compound including at least W carbide, the first shell part contains simple Pd, and the second shell part contains simple Pt.

公开(公告)号：US11271219B2

公开(公告)日：2022-03-08

申请号：US17052693

申请日：2019-05-15

Applicant: N.E. CHEMCAT CORPORATION

Inventor： Kiyotaka Nagamori ,  Yoko Nakamura ,  Tomoteru Mizusaki ,  Yasuhiro Seki ,  Hiroshi Igarashi

IPC: H01M4/92 ,  H01M4/86 ,  H01M4/88 ,  H01M8/1004 ,  H01M8/1018 ,  H01M4/02 ,  H01M8/10

Abstract: Provide an electrode catalyst with excellent catalytic activity that can contribute to cost reduction of PEFC. The electrode catalyst includes a hollow carbon carrier with mesopores with a pore size of 2 to 50 nm and a catalyst particle supported on the carrier. The catalyst particle is supported on both inside and outside the mesopores of the carrier, and have a core portion formed on the carrier and a shell portion covering at least a part of the surface of the core portion. Pd is included in the core portion, and Pt is included in the shell portion, and when the analysis of the particle size distribution of the catalyst particles using the three dimensional reconstructed image obtained by electron beam tomography (electron tomography) measurement using an STEM is performed, the ratio of the catalyst particles supported inside the mesopore is 50% or more.

公开(公告)号：US10256475B2

公开(公告)日：2019-04-09

申请号：US15648015

申请日：2017-07-12

Applicant: N.E. CHEMCAT Corporation

Inventor： Kiyotaka Nagamori ,  Tomoteru Mizusaki ,  Yoko Nakamura ,  Takuya Tsubaki ,  Hiroshi Igarashi ,  Yasuhiro Seki

IPC: H01M4/86 ,  H01M4/90 ,  H01M4/92 ,  H01M8/1004 ,  H01M8/1018

Abstract: Provided is an electrode catalyst that can exhibit sufficient performance, is suitable for mass production, and is suitable for reducing production costs, even when containing a relatively high concentration of chlorine. The electrode catalyst has a core-shell structure including a support; a core part that is formed on the support; and a shell part that is formed so as to cover at least one portion of the surface of the core part. A concentration of bromine (Br) species of the electrode catalyst as measured by X-ray fluorescence (XRF) spectroscopy is 500 ppm or less, and a concentration of chlorine (Cl) species of the electrode catalyst as measured by X-ray fluorescence (XRF) spectroscopy is 8,500 ppm or less.

公开(公告)号：US20190051910A1

公开(公告)日：2019-02-14

申请号：US16078306

申请日：2017-01-24

Applicant: N.E. CHEMCAT CORPORATION

Inventor： Tomoteru Mizusaki ,  Yoko Nakamura ,  Kiyotaka Nagamori ,  Hiroshi Igarashi ,  Yasuhiro Seki

IPC: H01M4/92 ,  H01M4/86 ,  H01M8/1004

Abstract: To provide electrode catalyst which has the catalyst activity and durability equal to or more than the Pt/Pd/C catalyst. The electrode catalyst has a support and catalyst particles supported on the support. The catalyst particle has the core part formed on the support and the shell part formed on the core part. The core part contains a Ti oxide and Pd, and the shell part contains Pt.

公开(公告)号：US10115992B2

公开(公告)日：2018-10-30

申请号：US15648063

申请日：2017-07-12

Applicant: N.E. CHEMCAT Corporation

Inventor： Kiyotaka Nagamori ,  Tomoteru Mizusaki ,  Yoko Nakamura ,  Hiroshi Igarashi ,  Yasuhiro Seki

IPC: H01M8/1004 ,  H01M4/86 ,  H01M4/90 ,  H01M4/92

Abstract: Provided is an electrode catalyst in which the contents of chlorine (Cl) species and bromine (Br) species are reduced to a predetermined level or lower, capable of exhibiting sufficient catalyst performance. The electrode catalyst has a core-shell structure including a support, a core part formed on the support and a shell part formed to cover at least a part of the surface of the core part. A concentration of bromine (Br) species of the electrode catalyst as measured by X-ray fluorescence (XRF) spectroscopy is 400 ppm or less, and a concentration of chlorine (Cl) species of the electrode catalyst as measured by X-ray fluorescence (XRF) spectroscopy is 900 ppm or less.