In situ grown Ni phosphide nanowire array on Ni foam as a high-performance catalyst for hydrazine electrooxidation
| Autor: | Xiao-Ping Wen, Lin-Song Wu, Hong-Bin Dai, Hui Wu, He Wen, Ping Wang, Li-Yong Gan |
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| Rok vydání: | 2019 |
| Předmět: |
In situ
Materials science Phosphide Process Chemistry and Technology Hypophosphite Hydrazine Nanoparticle chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Nickel chemistry Chemical engineering 0210 nano-technology Selectivity General Environmental Science |
| Zdroj: | Applied Catalysis B: Environmental. 241:292-298 |
| ISSN: | 0926-3373 |
| DOI: | 10.1016/j.apcatb.2018.09.043 |
| Popis: | Synthesis of high-performance and cost-effective electrocatalysts towards hydrazine electrooxidation is vital to develop the direct hydrazine fuel cell (DHFC) as a viable energy conversion technology. Herein, we report a combined experimental and theoretical study of nickel phosphides (NixP) as promising catalysts for hydrazine electrooxidation. NixP nanowire array supported on a Ni foam (NF) was synthesized by a one-step phosphorization method using hypophosphite as a P-source. Ni12P5 and Ni2P phases are observed as the products of the direct phosphorization of commercial NF under the applied conditions with Ni2P nanoparticles exclusively distributing on the surface of Ni12P5. The NixP/NF catalyst exhibits a synergetic capabilities of exceptionally high activity, excellent durability and nearly 100% selectivity towards the complete electrooxidation of hydrazine in alkaline condition, which is among the best performance reported on hydrazine electrooxidation catalysts. First-principles calculations have been conducted to gain insight into the catalytic mechanism of Ni phosphides towards hydrazine electrooxidation. |
| Databáze: | OpenAIRE |
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