Effects of the Carbon Support Doping with Nitrogen for the Hydrogen Production from Formic Acid over Ni Catalysts
Science article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Energies
ISSN: 1996-1073
|
| Output data |
Year: 2019,
Volume: 12,
Number: 21,
Article number
: 4111,
Pages count
: 10
DOI:
10.3390/en12214111
|
| Tags |
nickel catalyst; porous carbon support; nitrogen doping; formic acid decomposition; hydrogen production |
| Authors |
Nishchakova Alina D.
1
,
Bulushev Dmitri A.
1,2,3
,
Stonkus Olga A.
2,3
,
Asanov Igor P.
1,3
,
Ishchenko Arcady V.
2,3
,
Okotrub Alexander V.
1,3
,
Bulusheva Lyubov G.
1,3
|
| Affiliations |
| 1 |
Laboratory of Physics & Chemistry of Nanomaterials, Nikolaev Institute of Inorganic Chemistry, SB RAS
|
| 2 |
Boreskov Institute of Catalysis, SB RAS
|
| 3 |
Department of Natural Sciences, Novosibirsk State University
|
|
Funding (1)
|
1
|
Russian Science Foundation
|
16-13-00016
|
Porous nitrogen-doped and nitrogen-free carbon materials possessing high specific surface
areas (400–1000 m2 g-1) were used for deposition of Ni by impregnation with nickel acetate followed
by reduction. The nitrogen-doped materials synthesized by decomposition of acetonitrile at 973,
1073, and 1173 K did not differ much in the total content of incorporated nitrogen (4–5 at%), but differed in the ratio of the chemical forms of nitrogen. An X-ray photoelectron spectroscopy study showed that the rise in the synthesis temperature led to a strong growth of the content of graphitic nitrogen on the support accompanied by a reduction of the content of pyrrolic nitrogen. The content of pyridinic nitrogen did not change significantly. The prepared nickel catalysts supported on nitrogen-doped carbons showed by a factor of up to two higher conversion of formic acid as compared to that of the nickel catalyst supported on the nitrogen-free carbon. This was related to stabilization of Ni in the
state of single Ni2+ cations or a few atoms clusters by the pyridinic nitrogen sites. The nitrogen-doped
nickel catalysts possessed a high stability in the reaction at least within 5 h and a high selectivity to
hydrogen (97%).