XAFSᐃ࡟ࡼࡿ㔠ᒓࢡࣛࢫࢱ࣮ᢸᣢ LDH ࢼࣀࢩ࣮ࢺࡢάᛶྥୖ࣓࢝ࢽࢬ࣒ࡢゎ᫂໭ 㔝 ⩧ ࠊ ᒣ ෆ ⨾✑஑ ᕞ ኱ Ꮫ  ࢝ ࣮ ࣎ ࣥ ࢽ ࣗ ࣮ ࢺ ࣛ ࣝ ࣭ ࢚ ࢿࣝ ࢠ ࣮ ᅜ 㝿 ◊ ✲ ᡤ㓟 ⣲ Ⓨ ⏕ ཯ ᛂ㸦 OER㸧ࡣ ෌ ⏕ ྍ ⬟ ࢚ ࢿ ࣝ ࢠ ࣮ ࢆỈ ⣲ ࢚ ࢿ ࣝ ࢠ ࣮ ࡜ ࡋ ࡚ ㈓ ⵳ ࡍ ࡿ ࣉ ࣟࢭ ࢫ ࡟ ࠾ ࠸ ࡚ ࠊ㘽 ࢆ ᥱ ࡿ ཯ ᛂ ࡢ ୍ ࡘ ࡛ ࠶ ࡿ ࠋࡋ࠿ ࡋ 㸪OER ࡢ 㛤 ጞ ࡟ ࡣ ኱ ࡁ ࡞ 㐣 㟁 ᅽ ࡢ༳ ຍ ࡀ ᚲ せ ࡜ ࡞ ࡿ ࡓ ࡵ ࠊ ప ࠸ 㐣 㟁 ᅽ ࡛ ཯ ᛂ ࢆ 㐍⾜ ࡉ ࡏ ࡿ 㧗 ά ᛶ ࡞ ゐ ፹ ࡢ 㛤 Ⓨ ࡀ ồ ࡵ ࡽࢀ ࡚ ࠸ ࡿ ࠋ ᒙ ≧ 」 Ỉ 㓟 ໬ ≀㸦 LDH㸧ࡣ ࠊ2 ౯ ࡜ 3 ౯ ࡢ㔠 ᒓ ࢖ ࢜ ࣥ ࡛ ᵓ ᡂ ࡉ ࢀ ࡿ 㔠 ᒓ Ỉ㓟 ໬ ≀ ࢼ ࣀ ࢩ ࣮ ࢺ ࡜ ࠊ ࢼ ࣀ ࢩ ࣮ ࢺ 㛫 ࡟ ᤄ ධ ࡉ ࢀࡿ ࢔ ࢽ ࢜ ࣥ ࠾ ࡼ ࡧ Ỉ ศ Ꮚ ࡟ ࡼ ࡗ ࡚ ᵓ ᡂࡉ ࢀ ࡿ ᒙ ≧ ໬ ྜ ≀ ࡛ ࠶ ࡿ ࠋ ㏆ ᖺ ࠊ Fe3+, Ni2+ࢆ ྵ ࡴ LDH ࠿ ࡽ ๤ 㞳 ࡋ ࡓ ࢼ ࣀ ࢩ ࣮ ࢺ
㸦 LDH-ns㸧ࡀ OER ࡟ 㧗 ࠸ ά ᛶ ࢆ ♧ ࡍ ࡇ ࡜ ࡀ ሗ ࿌ ࡉ ࢀࡓ ࠋᮏ ◊ ✲ ࡛ ࡣ ࠊLDH-ns ࡟ 㔠ᒓ ࢡ ࣛ ࢫ ࢱ ࣮ 㸦 Ir, Pt, Au㸧 ࢆ ᢸ ᣢ ࡋ ࠊ OER ࡢ ࡓࡵ ࡢ 㧗 ά ᛶ ࡞ 㟁 ᴟ ゐ ፹ ࡢ ྜ ᡂ ࢆ ヨ ࡳ
ࡓ ࠋSTEM ほ ᐹ ࠾ ࡼ ࡧ AFMᐃ ࡼ ࡾ ࠊ༢ ᒙ ࡟ ๤ 㞳 ࡉ ࢀ ࡓ LDH-ns ୖ ࡟ ᖹ ᆒ ⢏ ᚄ 1-2 nm⛬ ᗘ ࡢ 㔠 ᒓ ࢡ ࣛ ࢫ ࢱ ࣮ ࡀ 㧗 ศ ᩓ ࡟ ᢸ ᣢ ࡉ ࢀ ࡚ ࠸ࡿ ࡇ ࡜ ࢆ ☜ ㄆ ࡋ ࡓ ࠋ 1 M KOH Ỉ ⁐ ᾮ୰ ࡛ OER ࢆ ⾜ ࡗ ࡓ ࡜ ࡇ ࢁ ࠊ 㔠 ᒓ ࢡ ࣛ ࢫ ࢱ ࣮ ᢸ ᣢ ࢼ ࣀ ࢩ ࣮ ࢺ ࡣ ࢼ ࣀ ࢩ ࣮ ࢺ ࡢ ࡳ ࡜ ẚ ㍑
ࡋ ࡚ 80 mV ప ࠸ 㐣 㟁 ᅽ ࢆ ♧ ࡋ ࡓ ࠋXAFSᐃ ࠿ ࡽ ࠊAu ࡜ Pt ࡣ 0 ౯ ࡢ 㔠 ᒓ ࢡ ࣛ ࢫ ࢱ ࣮ ࠊIr ࡣ 4 ౯ ࡢ 㓟 ໬ ≀ ࢡ ࣛ ࢫ ࢱ ࣮ ࡜ ࡋ ࡚ ᢸ ᣢ ࡉ ࢀ ࡚࠸ ࡿ ࡇ ࡜ ࡀ ࢃ ࠿ ࡗ ࡓ ࠋࡉ ࡽ ࡟ ࠊࢼ ࣀ ࢩ࣮ ࢺ ࡜ ࢡ ࣛ ࢫ ࢱ ࣮ 㛫 ࡛ 㟁 Ⲵ ⛣ ື ࡀ ⏕ ࡌ ࠊ ά ᛶ Ⅼ ࡛ ࠶ ࡿ ࢼ ࣀ ࢩ ࣮ ࢺ ࡢ Fe3+ࡢ 㟁 Ꮚ ≧ ែࡀ ኚ ໬ ࡋ ࡓ ࡓ ࡵ ά ᛶ ࡀ ྥ ୖ ࡋ ࡓ ࡇ ࡜ ࡀ ᫂ ࡽ ࠿ ࡜࡞ ࡗ ࡓ ࠋ ,QWHUQDWLRQDO,QVWLWXWHIRU&DUERQ1HXWUDO(QHUJ\5HVHDUFK;$)6(OHFWURFDWDO\VWVIRUR[\JHQHYROXWLRQUHDFWLRQ/D\HUHG'RXEOH+\GUR[LGH/'+&ODULILFDWLRQRIPHFKDQLVPRIDFWLYLW\HQKDQFHPHQWIRU
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