Creation of a heterostacking reaction field to promote CO2 reduction

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K05671
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
• Research Institution: Tokyo Denki University
• Principal Investigator: Mochizuki Dai 東京電機大学, 工学部, 教授 (90434315)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 二酸化炭素還元 / 交互積層体 / ナノシート

Outline of Final Research Achievements

Heterostacked reaction fields were created and their catalytic activity was evaluated: NiAl LDH and Ti0.91O2 were nanosheeted to form heterostacked structures. The obtained heterostacked structures were estimated to be synthesized as nanosheet alternating stacked structures, since the sheets overlapped and the coexistence of elements derived from each nanosheet was confirmed. We attempted to synthesize titanium dioxide-reduced graphene oxide alternating layered structures by modifying TiO2 with azobenzene derivatives and rGO with α-CD, respectively, followed by the preparation of nanosheet dispersions. Core-shell catalysts were produced as part of the heterogeneous metal catalysts. The core-shell catalyst exhibited 1.8 times higher mass activity than conventional catalysts.

Free Research Field

無機合成化学

Academic Significance and Societal Importance of the Research Achievements

二酸化炭素還元反応を社会へ本格的な実装に対する大きな課題は，二酸化炭素還元の触媒活性の飛躍的な発展が不可欠である．一段高い二酸化炭素還元能の向上を目指すためには，二酸化炭素を捕捉・活性化するサイトと電子を効果的に注入するサイトをナノスケールの近接な位置に配置した新奇反応場を創出する必要があると考えた．二酸化炭素の還元反応を達成するため，ヘテロ積層無機(水)酸化物を精緻に配置した新奇ナノ構造触媒の創製を行った．その結果，これまでにない新奇ナノ構造に由来した高効率での還元反応の進行が見込まれ，二酸化炭素を利用した有用化学物質変換への礎となり得る．