Simultaneous Formation of CO and H<sub>2</sub>O<sub>2</sub> from CO<sub>2</sub> and H<sub>2</sub>O with a Ag–MnO<sub><i>x</i></sub>/CaTiO<sub>3</sub> Photocatalyst

DOI Web Site 被引用文献10件 参考文献45件
  • Tayyebeh Soltani
    Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
  • Akira Yamamoto
    Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
  • Surya Pratap Singh
    Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
  • Akihiko Anzai
    Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
  • Eri Fudo
    Molecular and Material Engineering, Interdisciplinary Graduate School of Science and Engineering, Kindai University, Higashiosaka, Osaka 577-8502, Japan
  • Atsuhiro Tanaka
    Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Higashiosaka, Osaka 577-8502, Japan
  • Hiroshi Kominami
    Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Higashiosaka, Osaka 577-8502, Japan
  • Hisao Yoshida
    Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan

この論文をさがす

説明

Carbon monoxide (CO) is an important feedstock for the chemical industry, and hydrogen peroxide (H 2 O 2 ) is also an important chemical with versatile applications. Here, a photocatalytic system was discovered for the simultaneous production of CO and H 2 O 2 from CO 2 and H 2 O with both high activity and selectivity without any externally applied voltage and any consumption of chemical compounds, which was promoted by using a calcium titanate (CaTiO 3 ) photocatalyst modified with a silver–manganese oxide (Ag–MnO x ) dual cocatalyst. Although a Ag/CaTiO 3 (CTO) photocatalyst was reported to reduce CO 2 with water to form CO and O 2 , the coexistence of MnO x species with silver nanoparticles (NPs) not only improved the CO formation rate more than 2 times with a selectivity of 76% but also changed the selectivity of the oxidative reaction and forms H 2 O 2 instead of O 2 with a high selectivity of 99%. The Ag NPs promoted the CO 2 reduction to CO by the photoexcited electrons, and the Mn­(III) oxide species deposited on the CaTiO 3 surface contributed to the water oxidation to H 2 O 2 by the positive holes in the aid of HCO 3 – as a reaction mediator. The produced CO is easily separated from the aqueous solution to the gas phase, and the H 2 O 2 is stably stored in the aqueous HCO 3 – solution. This photocatalytic system can utilize the stable and ubiquitous molecules (CO 2 and H 2 O) to produce reactive and useful molecules (CO and H 2 O 2 ), concurrently, meaning that it can convert photoenergy to storable chemical energy to increase sustainability.

収録刊行物

被引用文献 (10)*注記

もっと見る

参考文献 (45)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ