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Photoelectrocatalytic Synthesis of Hydrogen Peroxide by Molecular Copper‐Porphyrin Supported on Titanium Dioxide Nanotubes
ChemCatChem ( IF 3.8 ) Pub Date : 2018-02-20 , DOI: 10.1002/cctc.201702055
Dogukan H Apaydin 1 , Hathaichanok Seelajaroen 1 , Orathip Pengsakul 2 , Patchanita Thamyongkit 3, 4 , Niyazi Serdar Sariciftci 1 , Julia Kunze-Liebhäuser 5 , Engelbert Portenkirchner 5
Affiliation  

We report on a self‐assembled system comprising a molecular copper‐porphyrin photoelectrocatalyst, 5‐(4‐carboxy‐phenyl)‐10,15,20‐triphenylporphyrinatocopper(II) (CuTPP‐COOH), covalently bound to self‐organized, anodic titania nanotube arrays (TiO2 NTs) for photoelectrochemical reduction of oxygen. Visible light irradiation of the porphyrin‐covered TiO2 NTs under cathodic polarization up to −0.3 V vs. Normal hydrogen electrode (NHE) photocatalytically produces H2O2 in pH neutral electrolyte, at room temperature and without need of sacrificial electron donors. The formation of H2O2 upon irradiation is proven and quantified by direct colorimetric detection using 4‐nitrophenyl boronic acid (p‐NPBA) as a reactant. This simple approach for the attachment of a small molecular catalyst to TiO2 NTs may ultimately allow for the preparation of a low‐cost H2O2 evolving cathode for efficient photoelectrochemical energy storage under ambient conditions.

中文翻译:


二氧化钛纳米管负载铜卟啉光电催化合成过氧化氢



我们报告了一种自组装系统,该系统包含分子铜卟啉光电催化剂,5-(4-羧基苯基)-10,15,20-三苯基卟啉铜(II) (CuTPP-COOH),共价结合到自组织阳极上用于光电化学还原氧的二氧化钛纳米管阵列(TiO 2 NT)。与普通氢电极(NHE)相比,卟啉覆盖的 TiO 2 NT 在阴极极化高达 -0.3 V 的可见光照射下,在室温下,在 pH 中性电解质中光催化产生 H 2 O 2 ,​​无需牺牲电子供体。使用 4-硝基苯基硼酸 ( p -NPBA) 作为反应物,通过直接比色检测证明并量化了辐照时 H 2 O 2的形成。这种将小分子催化剂附着到 TiO 2 NT 上的简单方法最终可能允许制备低成本的 H 2 O 2演化阴极,用于在环境条件下进行高效的光电化学能量存储。
更新日期:2018-02-20
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