Abstract: 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%).

Cite: Nishchakova A.D. , Bulushev D.A. , Stonkus O.A. , Asanov I.P. , Ishchenko A.V. , Okotrub A.V. , Bulusheva L.G.
Effects of the Carbon Support Doping with Nitrogen for the Hydrogen Production from Formic Acid over Ni Catalysts
Energies. 2019. V.12. 4111 :1-10. DOI: 10.3390/en12214111 WOS Scopus РИНЦ OpenAlex

Identifiers:

Web of science:	WOS:000512340000090
Scopus:	2-s2.0-85075569939
Elibrary:	43208195
OpenAlex:	W2981491641

Citing:

DB	Citing
Web of science	18
Scopus	23
OpenAlex	27

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