Back to Search
Start Over
Ni-Supported Pd Nanoparticles with Ca Promoter: A New Catalyst for Low-Temperature Ammonia Cracking.
- Source :
- PLoS ONE; 8/26/2015, Vol. 10 Issue 8, p1-14, 14p
- Publication Year :
- 2015
-
Abstract
- In this paper we report a new nanometallic, self-activating catalyst, namely, Ni-supported Pd nanoparticles (Pd<subscript>NPs</subscript>/Ni) for low temperature ammonia cracking, which was prepared using a novel approach involving the transfer of nanoparticles from the intermediate carrier, i.e. nano-spherical SiO<subscript>2</subscript>, to the target carrier technical grade Ni (t-Ni) or high purity Ni (p-Ni) grains. The method that was developed allows a uniform nanoparticle size distribution (4,4±0.8 nm) to be obtained. Unexpectedly, the t-Ni-supported Pd NPs, which seemed to have a surface Ca impurity, appeared to be more active than the Ca-free (p-Ni) system. A comparison of the novel Pd<subscript>NPs</subscript>/Ni catalyst with these reported in the literature clearly indicates the much better hydrogen productivity of the new system, which seems to be a highly efficient, flexible and durable catalyst for gas-phase heterogeneous ammonia cracking in which the TOF reaches a value of 2615 mmol<subscript>H2</subscript>/g<subscript>Pd</subscript> min (10,570 mol<subscript>NH3</subscript>/mol<subscript>Pd(NP)</subscript> h) at 600°C under a flow of 12 dm<superscript>3</superscript>/h (t-Ni). [ABSTRACT FROM AUTHOR]
- Subjects :
- NICKEL
PALLADIUM
NANOPARTICLES
CALCIUM
CATALYSTS
LOW temperatures
AMMONIA
Subjects
Details
- Language :
- English
- ISSN :
- 19326203
- Volume :
- 10
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- PLoS ONE
- Publication Type :
- Academic Journal
- Accession number :
- 109111181
- Full Text :
- https://doi.org/10.1371/journal.pone.0136805