Facet‐Dependent and Light‐Assisted Efficient Hydrogen Evolution from Ammonia Borane Using Gold–Palladium Core–Shell Nanocatalysts. (3rd May 2016)

• Record Type: Journal Article
• Authors: Rej, Sourav; Hsia, Chi‐Fu; Chen, Tzu‐Yu; Lin, Fan‐Cheng; Huang, Jer‐Shing; Huang, Michael H.
• Is Part Of: Angewandte Chemie. Volume 128:Number 25(2016)
• Page Start: 7338
• Page End: 7342
• Publication Date: 2016-05-03
• Subjects: Flächenabhängige Eigenschaften -- Nanokristalle -- Palladium -- Plasmonische Photokatalysatoren -- Wasserstoffentwicklung; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201603021
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Au–Pd core–shell nanocrystals with tetrahexahedral (THH), cubic, and octahedral shapes and comparable sizes were synthesized. Similar‐sized Au and Pd cubes and octahedra were also prepared. These nanocrystals were used for the hydrogen‐evolution reaction (HER) from ammonia borane. Light irradiation can enhance the reaction rate for all the catalysts. In particular, Au–Pd THH exposing {730} facets showed the highest turnover frequency for hydrogen evolution under light with 3‐fold rate enhancement benefiting from lattice strain, modified surface electronic state, and a broader range of light absorption. Finite‐difference time‐domain (FDTD) simulations show a stronger electric field enhancement on Au–Pd core–shell THH than those on other Pd‐containing nanocrystals. Light‐assisted nitro reduction by ammonia borane on Au–Pd THH was also demonstrated. Au–Pd tetrahexahedra supported on activated carbon can act as a superior recyclable plasmonic photocatalyst for hydrogen evolution.