JP7222933B2 - 二酸化炭素を還元するガス拡散電極 - Google Patents
二酸化炭素を還元するガス拡散電極 Download PDFInfo
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- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
- C25B11/091—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds
- C25B11/095—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds at least one of the compounds being organic
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- C25B11/032—Gas diffusion electrodes
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- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
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- C25B11/055—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material
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- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/055—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material
- C25B11/057—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of a single element or compound
- C25B11/061—Metal or alloy
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
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- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
- C25B11/075—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of a single catalytic element or catalytic compound
- C25B11/081—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of a single catalytic element or catalytic compound the element being a noble metal
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- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
- C25B11/091—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds
- C25B11/093—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/054—Electrodes comprising electrocatalysts supported on a carrier
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- Electrodes For Compound Or Non-Metal Manufacture (AREA)
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Description
以下の例に従って製造されたGDEを、酸素電解で使用した。アノード空間と、イオン交換膜によって分離されたカソード空間とからなる実験セルを、本目的のために使用した。濃度300g/lのKHCO3溶液を、イリジウムでコーティングされたチタン電極を備えた市販のDSAで酸素が生成されたアノード空間で使用した。カソード空間は、旭硝子社製の市販のカチオン交換膜F133型によってアノード空間から分離した。GDEとカチオン交換膜との間には、300g/lの濃度を有するNaHCO3溶液がポンプ圧送により循環される電解質ギャップを設けた。GDEには、濃度が99.5容量%を超える二酸化炭素を、気体空間を介して供給した。アノード、膜、ガス拡散電極の面積は、それぞれ3cm2であった。電解液の温度は、25℃であった。電気分解の電流密度は、すべての実験で4kA/m2であった。
(本発明による)多孔質銀触媒の製造
0.1モルのAgNO3溶液400ml(AgNO3 6.796g)をクエン酸三ナトリウム0.8gと混合した。0.2モルの水素化ホウ素ナトリウム(NaBH4 3.024g)溶液400mlを、撹拌しながら最初の溶液にすばやく加え(約15秒、Re>10000)、1時間撹拌した。沈殿物をろ過し、水で洗浄し、50℃で一晩乾燥させた。
低多孔質銀触媒の製造
0.1モルのAgNO3(AgNO3 6.796g)溶液400mlをクエン酸三ナトリウム0.8gと混合する。撹拌しながら、0.2モルの水素化ホウ素ナトリウム(NaBH4 3.024g)溶液400mlをゆっくりと最初の溶液に滴下し(約1時間)、1時間撹拌した。沈殿物をろ過し、水で洗浄し、50℃で一晩乾燥させた。粉末は、BET、レーザー光散乱、および走査型電子顕微鏡法によって特性評価する。
GDEは、乾式法で、例1および例2の銀粉末93重量%と、Ames Goldsmith社製のLCP-1銀、ならびにDYNEON社製のPTFE TF2053 7重量%を、Ika社製モデルA11ベーシックミルで混合し、続いてローラープレスにより0.5kN/cmの力でプレスして製造した。電極は、上記の電解セルで使用し、2kA/m2および4kA/m2で動作させた。COのファラデー効率を下表に示す。
Claims (6)
- 二酸化炭素を電気化学的に一酸化炭素に変換する方法であって、
ガス拡散電極で二酸化炭素をカソード反応させてCOを形成し、アノード側で塩素または酸素を同時に生成し、
前記ガス拡散電極が、少なくとも1つのシート状の導電性支持体と、前記支持体に塗布されたガス拡散層と電極触媒とを含み、
前記ガス拡散層が、少なくとも電極触媒と疎水性ポリマーとの混合物からなり、
銀が電極触媒として機能し、
前記電極触媒が高多孔質の凝集ナノ粒子の形態の銀を含み、
前記ナノ粒子がBET法で測定した少なくとも2m2/gの表面積を有することを特徴とする、方法。 - 前記ガス拡散電極の電極触媒および疎水性ポリマーが粉末状で前記支持体に塗布され、圧縮されて前記ガス拡散層を形成することを特徴とする、請求項1に記載の方法。
- 前記ガス拡散電極の前記疎水性ポリマーがフッ素置換ポリマーであることを特徴とする、請求項1または2に記載の方法。
- 前記反応における電流密度が少なくとも2kA/m2であることを特徴とする、請求項1~3のいずれか1項に記載の方法。
- クロロアルカリ電解において、二酸化炭素を電気分解して一酸化炭素を生成するためのガス拡散電極の使用であって、
前記ガス拡散電極が、少なくとも1つのシート状の導電性支持体と、前記支持体に塗布されたガス拡散層と電極触媒とを含み、
前記ガス拡散層が、少なくとも電極触媒と疎水性ポリマーとの混合物からなり、
銀が電極触媒として機能し、
前記電極触媒が高多孔質の凝集ナノ粒子の形態の銀を含み、
前記ナノ粒子がBET法で測定した少なくとも2m2/gの表面積を有することを特徴とする、使用。 - アルカリ塩化物、および、二酸化炭素脱分極カソードとしてのガス拡散電極を含む、アルカリ塩化物の電解のための電解装置であって、
前記ガス拡散電極が、少なくとも1つのシート状の導電性支持体と、前記支持体に塗布されたガス拡散層と電極触媒とを含み、
前記ガス拡散層が、少なくとも電極触媒と疎水性ポリマーとの混合物からなり、
銀が電極触媒として機能し、
前記電極触媒が高多孔質の凝集ナノ粒子の形態の銀を含み、
前記ナノ粒子がBET法で測定した少なくとも2m2/gの表面積を有することを特徴とする、電解装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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EP17177031.6 | 2017-06-21 | ||
EP17177031.6A EP3418429A1 (de) | 2017-06-21 | 2017-06-21 | Gasdiffusionselektrode zur reduktion von kohlendioxid |
PCT/EP2018/066293 WO2018234322A1 (de) | 2017-06-21 | 2018-06-19 | Gasdiffusionselektrode zur reduktion von kohlendioxid |
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JP2020524742A JP2020524742A (ja) | 2020-08-20 |
JP7222933B2 true JP7222933B2 (ja) | 2023-02-15 |
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US (1) | US20200208283A1 (ja) |
EP (2) | EP3418429A1 (ja) |
JP (1) | JP7222933B2 (ja) |
KR (1) | KR20200020714A (ja) |
CN (1) | CN110770370B (ja) |
WO (1) | WO2018234322A1 (ja) |
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DE102018210457A1 (de) * | 2018-06-27 | 2020-01-02 | Siemens Aktiengesellschaft | Gasdiffusionselektrode zur Kohlendioxid-Verwertung, Verfahren zu deren Herstellung sowie Elektrolysezelle mit Gasdiffusionselektrode |
CN114373940A (zh) * | 2021-12-16 | 2022-04-19 | 清华大学 | 气体扩散电极及其制备方法和应用 |
KR20240010402A (ko) | 2022-07-15 | 2024-01-23 | 주식회사 엘지화학 | 전기화학적 이산화탄소 전환 시스템 |
KR20240031100A (ko) | 2022-08-29 | 2024-03-07 | 주식회사 엘지화학 | 전기 화학적 이산화 탄소 전환 시스템의 구동 방법 |
CN116876005A (zh) * | 2023-07-21 | 2023-10-13 | 深圳先进技术研究院 | 用于电催化co2还原制co的气相扩散电极、制备方法及应用 |
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JP2010521277A (ja) | 2006-09-22 | 2010-06-24 | バーイラン ユニバーシティー | ガス拡散電極内の触媒として使用可能な、酸化ジルコニウムによって活性が高められた銀粉の多孔質クラスター、及びその製造方法 |
WO2012118065A1 (ja) | 2011-02-28 | 2012-09-07 | 国立大学法人長岡技術科学大学 | 二酸化炭素の還元固定化システム、二酸化炭素の還元固定化方法、及び有用炭素資源の製造方法 |
JP2013067859A (ja) | 2011-09-23 | 2013-04-18 | Bayer Intellectual Property Gmbh | 改良されたガス拡散電極およびその製造方法 |
WO2015184388A1 (en) | 2014-05-29 | 2015-12-03 | Liquid Light, Inc. | Method and system for electrochemical reduction of carbon dioxide employing a gas diffusion electrode |
US20160017503A1 (en) | 2012-07-26 | 2016-01-21 | Liquid Light, Inc. | Method and System for Electrochemical Reduction of Carbon Dioxide Employing a Gas Diffusion Electrode |
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DE4444114C2 (de) | 1994-12-12 | 1997-01-23 | Bayer Ag | Elektrochemische Halbzelle mit Druckkompensation |
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DE102017204096A1 (de) * | 2017-03-13 | 2018-09-13 | Siemens Aktiengesellschaft | Herstellung von Gasdiffusionselektroden mit Ionentransport-Harzen zur elektrochemischen Reduktion von CO2 zu chemischen Wertstoffen |
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2017
- 2017-06-21 EP EP17177031.6A patent/EP3418429A1/de not_active Withdrawn
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- 2018-06-19 US US16/623,437 patent/US20200208283A1/en active Pending
- 2018-06-19 KR KR1020197037391A patent/KR20200020714A/ko not_active Application Discontinuation
- 2018-06-19 EP EP18735210.9A patent/EP3642391B1/de active Active
- 2018-06-19 WO PCT/EP2018/066293 patent/WO2018234322A1/de unknown
- 2018-06-19 JP JP2019570373A patent/JP7222933B2/ja active Active
- 2018-06-19 CN CN201880041586.2A patent/CN110770370B/zh active Active
Patent Citations (5)
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JP2010521277A (ja) | 2006-09-22 | 2010-06-24 | バーイラン ユニバーシティー | ガス拡散電極内の触媒として使用可能な、酸化ジルコニウムによって活性が高められた銀粉の多孔質クラスター、及びその製造方法 |
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JP2013067859A (ja) | 2011-09-23 | 2013-04-18 | Bayer Intellectual Property Gmbh | 改良されたガス拡散電極およびその製造方法 |
US20160017503A1 (en) | 2012-07-26 | 2016-01-21 | Liquid Light, Inc. | Method and System for Electrochemical Reduction of Carbon Dioxide Employing a Gas Diffusion Electrode |
WO2015184388A1 (en) | 2014-05-29 | 2015-12-03 | Liquid Light, Inc. | Method and system for electrochemical reduction of carbon dioxide employing a gas diffusion electrode |
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WO2018234322A1 (de) | 2018-12-27 |
EP3418429A1 (de) | 2018-12-26 |
KR20200020714A (ko) | 2020-02-26 |
JP2020524742A (ja) | 2020-08-20 |
EP3642391A1 (de) | 2020-04-29 |
EP3642391B1 (de) | 2023-08-02 |
CN110770370B (zh) | 2022-11-25 |
CN110770370A (zh) | 2020-02-07 |
US20200208283A1 (en) | 2020-07-02 |
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