Atomically Dispersed Pt on the Surface of Ni Particles: Synthesis and Catalytic Function in Hydrogen Generation from Aqueous Ammonia–Borane
| Autor: | Anan Wu, Daiju Matsumura, Teng He, Shu Miao, Ping Chen, Zhao Li, Lin Liu, Guotao Wu |
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| Rok vydání: | 2017 |
| Předmět: |
Aqueous solution
Materials science Ammonia borane Inorganic chemistry Alloy 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences Hydrogen storage chemistry.chemical_compound chemistry engineering Dehydrogenation Noble metal 0210 nano-technology Hydrogen production |
| Zdroj: | ACS Catalysis. 7:6762-6769 |
| ISSN: | 2155-5435 |
| Popis: | The development of cost-effective and highly efficient catalysts is of scientific importance and practical need in the conversion and utilization of clean energy. One of the strategies fulfilling that demand is to achieve high exposure of a catalytically functional noble metal to reactants to maximize its utilization efficiency. We report herein that the single-atom alloy (SAA) made of atomically dispersed Pt on the surface of Ni particles (Pt is surrounded by Ni atoms) exhibits improved catalytic activity on the hydrolytic dehydrogenation of ammonia–borane, a promising hydrogen storage method for onboard applications. Specifically, an addition of 160 ppm of Pt leads to ca. 3-fold activity improvement in comparison to that of pristine Ni/CNT catalyst. The turnover frequency based on the isolated Pt is 12000 molH2 molPt–1 min–1, which is about 21 times the value of the best Pt-based catalyst ever reported. Our simulation results indicate that the high activity achieved stems from the synergistic effect bet... |
| Databáze: | OpenAIRE |
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