Preparation of Porous Co-Pt Alloys for Catalytic Synthesis of Carbon Nanofibers
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Nanotechnology
ISSN: 0957-4484
, E-ISSN: 1361-6528
|
| Output data |
Year: 2020,
Volume: 31,
Number: 49,
Article number
: 495604,
Pages count
: 11
DOI:
10.1088/1361-6528/abb430
|
| Tags |
cobalt, platinum, porous nanoalloys, X-ray diffraction, alloy catalysts, carbon nanofibers |
| Authors |
Popov Anton A
1
,
Shubin Yury V
1
,
Bauman Yury I
2
,
Plyusnin Pavel E
1
,
Mishakov Ilya V
2
,
Sharafutdinov Marat R
3
,
Maximovskii Eugene A.
1
,
Korenev Sergey V
1
,
Vedyagin Aleksey A
2
|
| Affiliations |
| 1 |
Nikolaev Institute of Inorganic Chemistry SB RAS
|
| 2 |
Boreskov Institute of Catalysis SB RAS
|
| 3 |
Institute of Solid State Chemistry and Mechanochemistry SB RAS
|
|
Funding (2)
|
1
|
Federal Agency for Scientific Organizations
|
0303-2016-0014
|
|
2
|
Russian Foundation for Basic Research
|
18-03-00777
|
A simple and convenient procedure for the production of porous Co-Pt nanoalloys to be used as catalysts for the synthesis of nanostructured carbon fibers (CNF) has been developed. The technique is based on the thermal decomposition of specially synthesized multicomponent precursors in a reducing atmosphere. A series of porous single-phase Co-Pt nanoalloys (10-75 at.% Pt) have been synthesized. The nanoalloys containing 75 and 50 at.% Pt were identified by the x-ray diffraction analysis as the intermetallics CoPt3 and CoPt, respectively. Within the region of 10-35 at.% Pt, the synthesized nanoalloys are represented by Co1-xPtx random solid solutions with face-centered cubic lattice. The alloys obtained are characterized by a porous structure consisting of assembled fragments with a size of 50-150 nm. These nanoalloys were tested in the catalytic chemical vapor deposition of the ethylene to CNF. A significant synergistic effect between Co and Pt in the synthesis of carbon nanomaterials was revealed. The yield of CNF (for 30 min reaction) for catalysts containing 25-35 at.% Pt was 30-38 g(CNF)/g(cat), whereas those for Co (100%) and Pt (100%) samples were as low as 5.6 and > 0.1 g(CNF)/g(cat), respectively. The produced carbon nanomaterial composed of fibers with a segmented structure was shown to be characterized by a rather high specific surface area (200-250 m2/g) and structural homogeneity.