Back to Search
Start Over
Ni-Based Catalyst Derived from NiAl Layered Double Hydroxide for Vapor Phase Catalytic Exchange between Hydrogen and Water
- Source :
- Nanomaterials, Volume 9, Issue 12
- Publication Year :
- 2019
- Publisher :
- MDPI, 2019.
-
Abstract
- A high-efficient and low-cost catalyst on hydrogen isotope separation between hydrogen and water is an essential factor in industrial application for heavy water production and water detritiation. In past studies, Pt-based catalysts were developed but not practical for commercial use due to their high cost for vapor phase catalytic exchange (VPCE), while for impregnated nickel catalysts with a lower cost the problems of agglomeration and low Ni utilization existed. Therefore, to solve these problems, in-situ grown Ni-based catalysts (NiAl-LDO) derived from a layered double hydroxide (LDH) precursor were fabricated and first applied in VPCE in this work. Compared with traditional impregnated Ni-based catalysts, NiAl-LDO catalysts own a unique layered structure, homogeneous dispersed metallic phase, higher specific surface area as well as stronger metal-support interactions to prevent active metal from agglomerating. These advantages are beneficial for exposing more active sites to improve dynamic contacts between H2 and HDO in a catalyst surface and can bring excellent catalytic activity under a reaction temperature of lower than 400 &deg<br />C. Additionally, we found that the dissociative chemisorption of HDO and H2 occurs not only in Ni (111) but also in NiO species where chemisorbed H(ads), D(ads), OH(ads) and OD(ads) are formed. The results highlight that both of the Ni2+ species and Ni0 species possess catalytic activities for VPCE process.
- Subjects :
- Materials science
Hydrogen
General Chemical Engineering
chemistry.chemical_element
layered double oxides
02 engineering and technology
010402 general chemistry
01 natural sciences
Article
Catalysis
Metal
chemistry.chemical_compound
vapor phase catalytic exchange
Phase (matter)
Specific surface area
General Materials Science
Non-blocking I/O
Ni catalyst
021001 nanoscience & nanotechnology
0104 chemical sciences
Nickel
chemistry
Chemical engineering
visual_art
water detritiation
visual_art.visual_art_medium
Hydroxide
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 20794991
- Volume :
- 9
- Issue :
- 12
- Database :
- OpenAIRE
- Journal :
- Nanomaterials
- Accession number :
- edsair.doi.dedup.....6d9e55e6874fe9c2c9c8ab3bca184656