Fabrication of highly functional layered hydroxide catalysts based on a structure controlling in nanometer-scale

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K15368
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
• Research Institution: Hiroshima University
• Principal Investigator: Naoki Tarutani 広島大学, 先進理工系科学研究科(工), 助教 (60806199)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: 層状金属水酸化物 / ナノ粒子 / 電気化学触媒 / 層状金属水酸化物塩 / ナノシート

Outline of Final Research Achievements

Layered metal hydroxides are composed of alternate stacking of hydroxide sheets and anion molecule layers. In this study, nanosized layered metal hydroxides were synthesized. Systematic investigation of synthesis condition enabled to tune the crystal growth direction. As a result, layered metal hydroxide nanoparticles having different crystal edge ratio were obtained. Composites including synthesized layered metal hydroxide nanoparticles and various sized carbon materials were prepared toward electrochemical evaluations. It was found that the composites of layered metal hydroxide nanoparticles with carbon microparticles showed improved electrochemical functions compared with the composites of layered metal hydroxide nanoparticles with carbon nanoparticles.

Free Research Field

無機材料化学

Academic Significance and Societal Importance of the Research Achievements

再生可能エネルギーの普及に向けて水電解や空気電池の実用化が進められており、双方に関わる酸素生成反応の効率的な進行が望まれている。層状金属水酸化物は安価で埋蔵量の多い元素から構成されており、触媒活性を示す有望な材料である。本研究では層状金属水酸化物をナノ粒子化し、その大きさや形状を様々に制御する手法を確立した。さらに、層状金属水酸化物ナノ粒子の電気化学特性を最大化するため、導電材の大きさについて系統的に検討して最適化の指針を得た。