JP2021113141A - 水素の製造方法 - Google Patents
水素の製造方法 Download PDFInfo
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- JP2021113141A JP2021113141A JP2020005878A JP2020005878A JP2021113141A JP 2021113141 A JP2021113141 A JP 2021113141A JP 2020005878 A JP2020005878 A JP 2020005878A JP 2020005878 A JP2020005878 A JP 2020005878A JP 2021113141 A JP2021113141 A JP 2021113141A
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- light
- water
- reduction catalyst
- hydrogen
- thiophene polymer
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 239000001257 hydrogen Substances 0.000 title claims abstract description 114
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 114
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 84
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 claims abstract description 216
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 152
- 239000003054 catalyst Substances 0.000 claims abstract description 139
- 229930192474 thiophene Natural products 0.000 claims abstract description 134
- 229920000642 polymer Polymers 0.000 claims abstract description 112
- 239000000758 substrate Substances 0.000 claims abstract description 112
- 230000003647 oxidation Effects 0.000 claims abstract description 44
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 44
- 230000031700 light absorption Effects 0.000 claims abstract description 32
- 230000001590 oxidative effect Effects 0.000 claims abstract description 26
- 150000003577 thiophenes Chemical class 0.000 claims abstract description 26
- 230000009467 reduction Effects 0.000 claims description 66
- 238000006116 polymerization reaction Methods 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 27
- 230000005525 hole transport Effects 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 19
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 18
- 239000011630 iodine Substances 0.000 claims description 18
- 229910052740 iodine Inorganic materials 0.000 claims description 18
- 239000000654 additive Substances 0.000 claims description 15
- 230000000996 additive effect Effects 0.000 claims description 15
- 150000002431 hydrogen Chemical class 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 2
- -1 hydroxide ions Chemical class 0.000 abstract description 13
- 230000000379 polymerizing effect Effects 0.000 abstract description 9
- 239000004065 semiconductor Substances 0.000 abstract description 7
- 230000003197 catalytic effect Effects 0.000 abstract description 5
- 230000001678 irradiating effect Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 20
- 229910021397 glassy carbon Inorganic materials 0.000 description 17
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 15
- KXSFECAJUBPPFE-UHFFFAOYSA-N 2,2':5',2''-terthiophene Chemical compound C1=CSC(C=2SC(=CC=2)C=2SC=CC=2)=C1 KXSFECAJUBPPFE-UHFFFAOYSA-N 0.000 description 13
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 238000004770 highest occupied molecular orbital Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000003960 organic solvent Substances 0.000 description 6
- XJKSTNDFUHDPQJ-UHFFFAOYSA-N 1,4-diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=C(C=2C=CC=CC=2)C=C1 XJKSTNDFUHDPQJ-UHFFFAOYSA-N 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 239000008187 granular material Substances 0.000 description 5
- 238000002847 impedance measurement Methods 0.000 description 5
- 229930184652 p-Terphenyl Natural products 0.000 description 5
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- 229910021607 Silver chloride Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 4
- ZSIJUXOIEHXKQE-UHFFFAOYSA-N 2-(4-thiophen-2-ylnaphthalen-1-yl)thiophene Chemical compound C1=CSC(C=2C3=CC=CC=C3C(C=3SC=CC=3)=CC=2)=C1 ZSIJUXOIEHXKQE-UHFFFAOYSA-N 0.000 description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
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- MAGFQRLKWCCTQJ-UHFFFAOYSA-N 4-ethenylbenzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=C(C=C)C=C1 MAGFQRLKWCCTQJ-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
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- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- RDOXTESZEPMUJZ-UHFFFAOYSA-N anisole Chemical compound COC1=CC=CC=C1 RDOXTESZEPMUJZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-YPZZEJLDSA-N carbon-10 atom Chemical compound [10C] OKTJSMMVPCPJKN-YPZZEJLDSA-N 0.000 description 2
- 229920001940 conductive polymer Polymers 0.000 description 2
- 229920000547 conjugated polymer Polymers 0.000 description 2
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(i) oxide Chemical compound [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- AHRQMWOXLCFNAV-UHFFFAOYSA-O ethylammonium nitrate Chemical compound CC[NH3+].[O-][N+]([O-])=O AHRQMWOXLCFNAV-UHFFFAOYSA-O 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 229940071125 manganese acetate Drugs 0.000 description 2
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000033116 oxidation-reduction process Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
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- SXWIAEOZZQADEY-UHFFFAOYSA-N 1,3,5-triphenylbenzene Chemical compound C1=CC=CC=C1C1=CC(C=2C=CC=CC=2)=CC(C=2C=CC=CC=2)=C1 SXWIAEOZZQADEY-UHFFFAOYSA-N 0.000 description 1
- XMGRUKCVUYLTKU-UHFFFAOYSA-N 1,3,5-tris(4-methylphenyl)benzene Chemical compound C1=CC(C)=CC=C1C1=CC(C=2C=CC(C)=CC=2)=CC(C=2C=CC(C)=CC=2)=C1 XMGRUKCVUYLTKU-UHFFFAOYSA-N 0.000 description 1
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- ZEMDSNVUUOCIED-UHFFFAOYSA-N 1-phenyl-4-[4-[4-(4-phenylphenyl)phenyl]phenyl]benzene Chemical group C1=CC=CC=C1C1=CC=C(C=2C=CC(=CC=2)C=2C=CC(=CC=2)C=2C=CC(=CC=2)C=2C=CC=CC=2)C=C1 ZEMDSNVUUOCIED-UHFFFAOYSA-N 0.000 description 1
- OHZAHWOAMVVGEL-UHFFFAOYSA-N 2,2'-bithiophene Chemical compound C1=CSC(C=2SC=CC=2)=C1 OHZAHWOAMVVGEL-UHFFFAOYSA-N 0.000 description 1
- ZBSHDHHSYAYSGX-UHFFFAOYSA-N 2-(2-fluoro-4-thiophen-2-ylphenyl)thiophene Chemical compound FC1=CC(C=2SC=CC=2)=CC=C1C1=CC=CS1 ZBSHDHHSYAYSGX-UHFFFAOYSA-N 0.000 description 1
- WERRSKAVSZCYBA-UHFFFAOYSA-N 2-(3-phenylthiophen-2-yl)-3-thiophen-2-ylthiophene Chemical compound C1(=CC=CC=C1)C1=C(SC=C1)C=1SC=CC=1C=1SC=CC=1 WERRSKAVSZCYBA-UHFFFAOYSA-N 0.000 description 1
- AGBXYHCHUYARJY-UHFFFAOYSA-N 2-phenylethenesulfonic acid Chemical compound OS(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-N 0.000 description 1
- PJRGDKFLFAYRBV-UHFFFAOYSA-N 2-phenylthiophene Chemical compound C1=CSC(C=2C=CC=CC=2)=C1 PJRGDKFLFAYRBV-UHFFFAOYSA-N 0.000 description 1
- 125000000175 2-thienyl group Chemical group S1C([*])=C([H])C([H])=C1[H] 0.000 description 1
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- YUXBNNVWBUTOQZ-UHFFFAOYSA-N 4-phenyltriazine Chemical compound C1=CC=CC=C1C1=CC=NN=N1 YUXBNNVWBUTOQZ-UHFFFAOYSA-N 0.000 description 1
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VMQMZMRVKUZKQL-UHFFFAOYSA-N Cu+ Chemical compound [Cu+] VMQMZMRVKUZKQL-UHFFFAOYSA-N 0.000 description 1
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- 239000007983 Tris buffer Substances 0.000 description 1
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- 230000002378 acidificating effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
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- YSXKPIUOCJLQIE-UHFFFAOYSA-N biperiden Chemical compound C1C(C=C2)CC2C1C(C=1C=CC=CC=1)(O)CCN1CCCCC1 YSXKPIUOCJLQIE-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Landscapes
- Carbon And Carbon Compounds (AREA)
- Catalysts (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
Description
前記添加分子は、前記チオフェン重合体に取り込まれず、除去される場合がある。
前記導電性基板と前記光吸収水還元触媒層との間に、ホール輸送薄層が設けられる場合がある。
本発明の実施形態の1つは、水素の製造方法である。
・前記チオフェン類と同一の有機溶媒に可溶であること、
・その溶液を導電性基板上に塗布可能であること、
・これを例えば減圧等によって乾燥する際に蒸散しないこと、
・この固相塗布体をヨウ素蒸気などに晒してチオフェン類を酸化重合する際に重合を妨害せず、
・また共重合などチオフェン重合体に組み込まれないこと、及び、
・反応性基の置換がないこと。
本発明のもう1つの実施形態は、光吸収水還元触媒基板の作製方法である。
本発明のもう1つの実施形態は、水素の製造のための光吸収水還元−水・酸化基板である。
グラッシーカーボン基板上に、ターチオフェンと添加分子として1,4-ジ(2-チエニル)ベンゼンを塗布し、これをヨウ素蒸気に曝し、これを重合(下記で詳細に記載する。)し、のちに添加分子等を洗浄・除去することによって、光吸収水還元触媒層として形成した基板を、グラッシーカーボン基板上に水・酸化触媒層を形成した別の基板と導線で連結し、水酸化イオン含有水に浸漬し、光照射により水素を製造した(実施例1)。また、比較例1として、添加分子を使用せず、そして、添加分子の洗浄・除去の工程を含まない以外は同様の方法で光吸収水還元触媒層を作製し、同様に光照射により水素を製造した。以下に詳細に説明する。
図3に示すように、ターチオフェン 100mg、1,4-ジ(2-チエニル)ベンゼン 50mgをクロロベンゼン 15mLに溶解させ、同溶液3mLを、グラッシーカーボン基板(ALLIANCE Biosystems Inc.製)10cm角にドロップキャストした(添加分子の比率:33質量%)。これをベルジャー内に設置、同じく別シャーレ上に置いたヨウ素 0.5gとともに密閉して70℃、2時間加熱した。基板を取り出しホットプレート(70℃)に静置した後、基板のポリ(ターチオフェン)塗布面をクロロベンゼン 200mLで添加分子を洗浄・除去しポリ(ターチオフェン)の層を形成した。
酸化マンガン層は、公知の文献(Zhou, F., et al., Advanced Energy Materials 2, 1013-1021, doi:10.1002/aenm.201100783 (2012))に記載されている手順に従って作製した。200 mLのエチルアミンを4Mの希硝酸で中和し、続いて70℃で2時間、ロータリーエバポレーターを用いて減圧下で水を除去することによって、硝酸エチルアンモニウムを調製した。1:9の水:硝酸エチルアンモニウム混合液100mLに0.2gの酢酸マンガンを溶解し、電解液を調製した。0.25mLの4Mの希硝酸を添加して酸性とした。10cm角のグラッシーカーボン基板を電解液中に設置し、白金を対極として、200μA/cm2の定電流密度で5分間、120℃で通電した。グラッシーカーボン基板に堆積した酸化マンガン層を、蒸留水で十分洗浄した。
前記ターチオフェンのヨウ素蒸気による重合によって得られたチオフェン重合体を用い、該チオフェン重合体の薄層で被覆されたグラッシーカーボン10cm角基板と酸化マンガン層で被覆されたグラッシーカーボン10cm角基板を、図5の各槽(幅12cm、深さ3cm、奥行0.3cm(各内寸))に別々に設置し、両者を銅線でつなぎ、該チオフェン重合体の薄層で被覆されたグラッシーカーボン基板を照射面として30mLのpH12の水酸化ナトリウム水溶液で満たし、光照射(疑似太陽光、放射照度量として1000W/m2、朝日分光株式会社製)することにより水素を製造した。
グラッシーカーボン基板10cm角の片面上に、水・酸化触媒層として電解酸化法により酸化マンガンの薄層を形成した。この基板の反対面上に、ターチオフェン150mgと添加分子としてp-ターフェニル50mgをクロロベンゼン20mLに溶解した溶液を塗布し(添加分子の比率:25質量%)、これをヨウ素蒸気に曝し、これを重合し、その後、添加分子等を洗浄・除去することによって、ポリ(ターチオフェン)の層を形成した。ヨウ素蒸気による重合法などは実施例1に従って実施した。インピーダンス測定によるチオフェン重合体層の厚み方向の電気抵抗は、7Ωであった。また、チオフェン重合体層の膜厚は、40nmであった。
実施例2で示した水素の製造方法において、さらに導電性基板と光吸収水還元触媒層の間にホール輸送薄層を設け、同様に水素の製造を行った。以下に詳細を示す。
実施例3と同様にグラッシーカーボン基板10cm角の片面上に、水・酸化触媒層として電解酸化法により酸化マンガンの薄層を形成した。この基板の反対面上に、チオフェンとナフタレンの3量体(1,4-ジ(2-チエニル)ナフタレン)150mgと添加分子としてp-ターフェニル50mgをクロロベンゼン20mLに溶解した溶液を塗布し(添加分子の比率:25質量%)、これをヨウ素蒸気に曝し、これを重合し、その後、添加分子等をクロロベンゼンにより洗浄・除去することによって、ポリ(1,4-ジ(2-チエニル)ナフタレン)の層を形成した。インピーダンス測定によるチオフェン重合体層の厚み方向の電気抵抗は、7Ωであった。また、チオフェン重合体層の膜厚は、40nmであった。
(1)水素の製造速度が十分に大きい(類似法での公知の値を2桁以上上回る)。これはLUMO準位が水を還元して水素を生成するに対して充分に高く、強い駆動力を有することに合わせ、
存させた酸化重合により作製されることにより厚み方向の電気抵抗が低いという特性を有することによる。この効果はホール輸送薄層を塗布した導電性基板の使用によりさらに大きくなる。
(2)光吸収水還元触媒層を形成した導電性基板と水・酸化触媒層を形成した導電性基板を導線で連結してなる(図5)、または光吸収水還元触媒と水・酸化触媒層とで導電性基板を挟んでなる(図2)、これらを水中に設置して成る光照射下での簡便な反応槽を可能にしている。
Claims (8)
- チオフェン類を添加分子と共存させ導電性基板上で酸化重合反応させることによって得られたチオフェン重合体からなる光吸収および水還元触媒層(以下、光吸収水還元触媒層と記載する。)と、水酸化イオン含有水の酸化触媒(以下、「水・酸化触媒」と記載する。)とを組み合わせて、これらを水酸化イオン含有水に浸漬し、前記光吸収水還元触媒層に光照射することを含むことを特徴とする水素の製造方法。
- 前記導電性基板と前記光吸収水還元触媒層との間に、ホール輸送薄層が設けられていることを特徴とする、請求項1に記載の水素の製造方法。
- 前記導電性基板に対して、前記光吸収水還元触媒層を片面上に、前記水・酸化触媒を他面上に形成した光吸収水還元-水酸化基板が用いられることを特徴とする請求項1または2に記載の水素の製造方法。
- チオフェン類を添加分子と共存させて、酸化重合反応により導電性基板上にチオフェン重合体からなる光吸収水還元触媒層を形成する工程を含むことを特徴とする光吸収水還元触媒基板の作製方法。
- 前記光吸収水還元触媒層を形成する工程に続いて、さらに前記添加分子を洗浄・除去する工程を含み、
前記添加分子は、前記チオフェン重合体に取り込まれず、除去されることを特徴とする請求項4に記載の光吸収水還元触媒基板の作製方法。 - 前記酸化重合反応が、ヨウ素蒸気による酸化重合反応であることを特徴とする請求項4または5に記載の光吸収水還元触媒基板の作製方法。
- さらに前記光吸収水還元触媒層を形成する工程の前に、前記導電性基板上にホール輸送薄層を設ける工程を含み、
前記導電性基板と前記光吸収水還元触媒層との間に、ホール輸送薄層が設けられることを特徴とする請求項4〜6のいずれか1項に記載の光吸収水還元触媒基板の作製方法。 - 導電性基板に対して、光吸収水還元触媒層を片面上に、水・酸化触媒層を他面上に構成される水素の製造のための光吸収水還元−水・酸化基板。
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