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CATALYST AND METHOD OF USE THEREOF

Foreign code F200010140
File No. AF40-06WO,(AF40P005)
Posted date Jun 2, 2020
Country WIPO
International application number 2019JP023369
International publication number WO 2019240200
Date of international filing Jun 12, 2019
Date of international publication Dec 19, 2019
Priority data
  • P2018-112139 (Jun 12, 2018) JP
Title CATALYST AND METHOD OF USE THEREOF
Abstract This composite comprises: a material having electrical conductivity; and a transition metal oxide which is supported by said material. The transition metal oxide has an amorphous structure.
Outline of related art and contending technology BACKGROUND ART
In recent years, in order to reduce the carbon dioxide can be used for renewable energy have been studied. Such as solar power and wind power as renewable energy produced from the secondary battery is difficult, the excess energy generated from renewable energy as a means for stocking, hydrogen or ammonia, methylcyclohexane is used as a carrier energy and the like have been proposed. In any case the excess energy from the hydrogen needs to be obtained. Efficiently as a method to obtain hydrogen, a hydrocarbon such as from a fossil fuel steam reforming method or the like has been known a method for obtaining hydrogen. However, in a case where the global environmental problems, fossil resources as possible to obtain hydrogen by a method not depending on the important.
Such as, electrolysis reaction of water is known. Electrolysis of water using fossil fuels as the steam reforming method or the like, industrial method for producing hydrogen is established, the rise of the hydrocarbons and petrochemical by steam reforming method which is economically advantageous. Under such circumstances, the industry as a method for producing hydrogen by electrolysis in order to use, high temperature and high pressure water electrolysis, the electrolyte of the solid polymer electrolyte (Solid Polymer Electrolytes, SPE), such as high temperature steam electrolysis has been the development of the technology.
The voltage of the electrolytic bath of water, the electrolytic voltage theory, due to the resistance of a reaction in the electrode overvoltage, and the electrical resistance of the membrane electrolyte by adding the ohmic losses. Theoretical electrolytic voltage is, the amount of electricity for the electrolysis and the enthalpy change and the amount of electricity required for the (1.23V) is obtained from the voltage and the like. Of the water in order to reduce the voltage of the electrolytic cell, the electrolytic voltage of the theoretical, reducing any of the overvoltage and ohmic losses can be considered. This can also be obtained from the calculation of the theoretical one in the electrolytic voltage is, the optimum value by changing the design of cell ohmic losses can be obtained, the ability to promote the electrochemical reaction overvoltage a strong catalytic activity can be lowered by using a higher electrode can.
Is Patent Document 1, the iridium oxide catalyst was used and the electrolysis of water at the anode, a cathode with generated protons, alcohol and a carboxylic acid at the cathode to generate hydrogen has been disclosed a technology.
Non-Patent Document 1 is, the obtained electrodeposited the electronic structure of the iridium oxide film was examined, the electrolysis of water during the reaction between Ir of the Ir (III) oxidation state (V) the presence of both the clear.
Is in Non-Patent Document 2, firing at 500°C the iridium oxide generated (T-IrO2), which are obtained by further 500°C reduction of the iridium (A-Ir), which is obtained by electrochemical oxidation in the E-Ir, the performance was evaluated as the anode has been described. According to this, the oxygen evolution reaction occurs in a region where the Ir (III) is present, Ir (III) is, in the E-Ir and the T-IrO2 E-Ir is preferable that, the E-Ir amorphous and, Ir atoms in the porous surface of a large exposure has been described.
Scope of claims (In Japanese)[請求項1]
電気伝導性を有する材料と、該材料に担持された遷移金属の酸化物と、を備え、前記遷移金属の酸化物はアモルファス構造を有する複合体。

[請求項2]
電気伝導性を有する材料と、該材料に担持された遷移金属の酸化物と、を備え、前記遷移金属の酸化物はアモルファス構造を有する複合体を含む触媒。

[請求項3]
電気伝導性を有する材料と、該材料に担持された遷移金属の酸化物とを備える複合体が、電気伝導性を有する基材に保持された構造体であって、前記遷移金属は、周期表第8~第10族の遷移金属の少なくとも1種であり、前記遷移金属の酸化物はアモルファス構造を有し、前記基材は多孔質材料である構造体。

[請求項4]
電気伝導性を有する材料と、該材料に担持された遷移金属の酸化物とを備える複合体が、電気伝導性を有する基材に保持された電極であって、前記遷移金属は、周期表第8~第10族の遷移金属の少なくとも1種であり、前記遷移金属の酸化物はアモルファス構造を有し、前記基材は多孔質材料である電極触媒。

[請求項5]
電気伝導性を有する材料と、該材料に担持された遷移金属の酸化物とを備える複合体が、電気伝導性を有する基材に保持された構造体を含む電極をアノードに用いた電気化学反応装置。

[請求項6]
電気伝導性を有する材料と、該材料に担持された遷移金属の酸化物とを備える複合体が、電気伝導性を有する基材に保持された構造体を含むアノードと、カソードと、前記アノードと前記カソードとの間に設けられた電解質膜と、を具備する膜電極接合体。

[請求項7]
請求項6に記載の膜電極接合体を備え、前記アノードに水または水蒸気を供給する第1の供給手段と、前記カソードにカルボン酸類を提供する第2の供給手段と、前記カソードにおいて生成されたアルコールを回収する手段と、を備えるアルコール合成装置。

[請求項8]
電気伝導性を有する材料と、該材料に担持された遷移金属の酸化物と、を備える複合体が、多孔質構造で電気伝導性基材に保持された構造体の製造方法であって、
電気伝導性を有する材料を、遷移金属の酸化物の前駆体の溶液に浸漬し、前記材料を浸漬した前記溶液を加熱する工程を有する構造体の製造方法。

[請求項9]
電気伝導性を有する材料と、該材料に担持された遷移金属の酸化物と、を備える複合体が、多孔質構造の電気伝導性基材に保持された電極触媒の製造方法であって、
遷移金属の酸化物の前駆体をアルカリ金属の水溶液または多価アルコール水で処理して得られた遷移金属により得られた遷移金属を固体電解質膜に塗布し、電気伝導性を有する材料を保持した基材を併せて接合する工程を有する電極触媒の製造方法。

[請求項10]
前記電気伝導性を有する材料が酸化チタンであり、前記遷移金属の酸化物が酸化イリジウムであり、前記多孔質構造の電気伝導性基材がチタンである請求項9に記載の電極触媒の製造方法。

[請求項11]
電極触媒の活性化方法であって、
電解液中に設けた請求項4に記載の電極触媒と標準電極の系において、オンセット電位に対し、印加電圧を-3.0V~1.5Vの範囲で1往復以上掃引する電極触媒の活性化方法。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • Inventor
  • YAMAUCHI MIHO
  • NAKASHIMA NAOTOSHI
  • KITANO SHO
  • CHENG JUNFANG
  • FUKUSHIMA TAKASHI
  • HIGASHI MANABU
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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