Noble-Metal-Free Ni–W–O-Derived Catalysts for High-Capacity Hydrogen Production from Hydrazine Monohydrate
| Autor: | Deng-Xue Zhang, Yu-Ping Qiu, Hui Wu, Chen Chen, Qing Shi, Liang-Liang Zhou, Hui Yin, Ping Wang |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Hydrogen Renewable Energy Sustainability and the Environment General Chemical Engineering chemistry.chemical_element 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Article 0104 chemical sciences Catalysis Chemical state Hydrogen storage Hydrogen carrier chemistry Chemical engineering engineering Environmental Chemistry Noble metal 0210 nano-technology Selectivity Hydrogen production |
| Zdroj: | ACS Sustain Chem Eng |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.9b07782 |
| Popis: | Development of active and earth-abundant catalysts is pivotal to render hydrazine monohydrate (N(2)H(4)·H(2)O) viable as a hydrogen carrier. Herein, we report the synthesis of noble-metal-free Ni–W–O-derived catalysts using a hydrothermal method in combination with reductive annealing treatment. Interestingly, the thus-prepared Ni-based catalysts exhibit remarkably distinct catalytic properties toward N(2)H(4)·H(2)O decomposition depending upon the annealing temperature. From a systematic phase/microstructure/chemical state characterization and the first-principles calculations, we found that the variation of the apparent catalytic properties of these Ni-based catalysts should stem from the formation of different Ni–W alloys with distinct intrinsic activity, selectivity, and distribution state. The thereby chosen Ni–W alloy nanocomposite catalyst prepared under an optimized condition showed high activity, nearly 100% selectivity, and excellent stability toward N(2)H(4)·H(2)O decomposition for hydrogen production. Furthermore, this noble-metal-free catalyst enables rapid hydrogen production from commercially available N(2)H(4)·H(2)O solution with an intriguingly high hydrogen capacity of 6.28 wt % and a satisfactory dynamic response property. These results are inspiring and momentous for promoting the use of the N(2)H(4)·H(2)O-based H(2) source systems. |
| Databáze: | OpenAIRE |
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