NiPt Nanoparticles Anchored onto Hierarchical Nanoporous N-Doped Carbon as an Efficient Catalyst for Hydrogen Generation from Hydrazine Monohydrate
| Autor: | Chen Chen, Yu-Ping Qiu, Piao-Ping Tang, Gavin S. Walker, Liang-Liang Zhou, Muhua Chen, Qing Shi, Ping Wang |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanoporous Thermal decomposition chemistry.chemical_element Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Decomposition 0104 chemical sciences Catalysis Hydrogen storage Chemical engineering chemistry General Materials Science 0210 nano-technology Carbon Hydrogen production |
| Zdroj: | ACS Applied Materials & Interfaces. 12:18617-18624 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.0c03096 |
| Popis: | Catalytic decomposition of the hydrogen-rich hydrazine monohydrate (N2H4·H2O) represents a promising hydrogen storage/production technology. A rational design of advanced N2H4·H2O decomposition catalysts requires an overall consideration of intrinsic activity, number, and accessibility of active sites. We herein report the synthesis of a hierarchically nanostructured NiPt/N-doped carbon catalyst using a three-step method that can simultaneously address these issues. The chelation of metal precursors with polydopamine and thermolysis of the resulting complexes under reductive atmosphere resulted in a concurrent formation of N-doped carbon substrate and catalytically active NiPt alloy nanoparticles. Thanks to the usage of a silica nanosphere template and dopamine precursor, the N-doped carbon substrate possesses a hierarchical macroporous-mesoporous architecture. This, together with the uniform dispersion of tiny NiPt nanoparticles on the carbon substrate, offers opportunity for creating abundant and accessible active sites. Benefiting from these favorable attributes, the NiPt/N-doped carbon catalyst enables a complete and rapid hydrogen production from alkaline N2H4·H2O solution with a rate of 1602 h-1 at 50 °C, which outperforms most existing catalysts for N2H4·H2O decomposition. |
| Databáze: | OpenAIRE |
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