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：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：US20180114990A1

公开(公告)日：2018-04-26

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 ,  H01M8/1004

CPC classification number: H01M4/92 ,  H01M4/8807 ,  H01M4/8821 ,  H01M4/8828 ,  H01M4/926 ,  H01M8/1004 ,  H01M2008/1095

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：US20180013158A1

公开(公告)日：2018-01-11

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 ,  H01M4/86

CPC classification number: H01M8/1004 ,  B01J23/44 ,  B01J35/08 ,  B01J37/02 ,  H01M4/86 ,  H01M4/8657 ,  H01M4/8807 ,  H01M4/92 ,  H01M4/921 ,  H01M4/926 ,  H01M2008/1095

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：US20210184228A1

公开(公告)日：2021-06-17

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 ,  H01M8/1004 ,  H01M4/86 ,  H01M8/1018 ,  H01M4/88

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：US20190039051A1

公开(公告)日：2019-02-07

申请号：US16078314

申请日：2017-01-24

Applicant: N.E. CHEMCAT CORPORATION

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

IPC: B01J23/44 ,  H01M4/92 ,  H01M8/10 ,  B01J23/42 ,  B01J35/00

Abstract: To provide electrode catalyst which has the catalyst activity equal to or more than the Pt/Pd/C catalyst. The electrode catalyst 10A has a support 2 and catalyst particles 3a supported on the support. The catalyst particle has the core part 4 formed on the support, the first shell part 5a formed on the core part and the second shell part 6a formed on a part of the surface of the first shell part. The core part contains Pd, the first shell part contains Pt, and the second shell part contains the Ti oxide. A percentage of the Pt R1Pt (atom %) and a percentage of the Ti derived from the Ti oxide R1Ti (atom %) in an analytical region near a surface measured by X-ray photoelectron spectroscopy satisfy the conditions of the equation (1): 1.00≤(R1Ti/R1Pt)≤2.50.

公开(公告)号：US09461313B2

公开(公告)日：2016-10-04

申请号：US15022651

申请日：2015-03-27

Applicant: N.E. Chemcat Corporation

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

IPC: H01M4/92 ,  H01M4/86 ,  H01M8/10 ,  B01J23/44 ,  B01J27/13 ,  B01J35/08 ,  B01J37/16

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. The electrode catalyst concurrently fulfills conditions expressed by the following formulae (1) and (2): (X1/M)≦1.2 . . . (1) (X2/M)≦47.0 . . . (2) (in the formula (1) and the formula (2), M represents an amount of substance (number of atoms) of one or more constituent metal elements of the shell part, X1 represents an amount of substance (number of atoms) of bromine (Br), and X2 represents an amount of substance (number of atoms) of chlorine (Cl)).

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.