Photocatalytic NH3 Splitting on TiO2 Particles Decorated with Pt–Au Bimetallic Alloy Nanoparticles
Source abstract
Abstract
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 (Pt0.9Au0.1/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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Ammonia Synthesis and Nitrogen Reduction · Nanomaterials for catalytic reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Research Center for Solar Energy Chemistry, and Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
Materials Science Research Group, Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST Kansai), Ikeda 563-8577, Japan
Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, Ibaraki 567-0047, Japan
Funding
Ministry of Education, Culture, Sports, Science and Technology
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