Photocatalytic NH3 Splitting on TiO2 Particles Decorated with Pt–Au Bimetallic Alloy Nanoparticles,ACS Applied Nano Materials

当前位置： X-MOL 学术 › ACS Appl. Nano Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Photocatalytic NH3 Splitting on TiO2 Particles Decorated with Pt–Au Bimetallic Alloy Nanoparticles
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-01-24 , DOI: 10.1021/acsanm.9b02380
Yasuhiro Shiraishi ₁ , Shota Toi ₁ , Satoshi Ichikawa _{2,

3} , Takayuki Hirai ₁

Affiliation

Photocatalytic splitting of aqueous NH₃ into H₂ and N₂ on semiconductor powders is an important reaction toward on-site production of H₂ from NH₃, a promising hydrogen carrier for sustainable energy society. Earlier reports revealed that TiO₂ loaded with Pt nanoparticles (Pt/TiO₂) is the most effective catalyst for this reaction. Herein, we report that TiO₂ loaded with homogeneously mixed bimetallic alloy nanoparticles containing 90 mol % Pt and 10 mol % Au (Pt_0.9Au_0.1/TiO₂) promotes photocatalytic NH₃ splitting very efficiently. Electrochemical analysis indicates that Au alloying to Pt lowers the height of Schottky barrier created at the metal/TiO₂ interface. This promotes efficient transfer of conduction band electrons on TiO₂ to metal particles. This results in enhanced separation of the photogenerated charges, thus promoting efficient NH₃ splitting.

中文翻译：

Pt-Au双金属合金纳米粒子修饰的TiO ₂粒子的光催化NH ₃裂解

NH ₃水溶液在半导体粉末上的光催化分解为H ₂和N ₂是从NH ₃现场生产H ₂的重要反应，NH ₃是可持续能源社会的有希望的氢载体。先前的报告表明，二氧化钛₂装载的Pt纳米颗粒（铂/氧化钛₂）是用于该反应的最有效的催化剂。在本文中，我们报道了的TiO ₂负载有含90摩尔％Pt和10摩尔％的Au（铂均匀混合的双金属合金纳米粒子_0.9的Au _0.1 /的TiO ₂）光催化促进NH ₃拆分非常有效。电化学分析表明，与Pt合金化的Au降低了在金属/ TiO ₂界面处形成的肖特基势垒的高度。这促进了TiO ₂上的导带电子向金属颗粒的有效转移。这导致光生电荷的分离增强，从而促进有效的NH ₃裂解。

更新日期：2020-01-24

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11