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Desorption of hydrogen from Ni—Cu—Cr catalyst on (θ + α-Al2O3 sorbent modified with cerium

  • Physical Chemistry of Surface Phenomena
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Abstract

We present the results of thermal desorption studies of H2 interactions with 8.9% Ni—Cu—Cr (1:3:0.1)/(θ+α)-Al2O3+2% Ce. It was demonstrated that three forms of hydrogen with different desorption temperatures and Tmax peak values are formed in the catalyst at 673 K: H2(ads), H(ads), and dissolved hydrogen. It was found that upon an increase in the adsorption temperature from 673 to 1173 K, H2(ads) and H(ads) remain on the surface (Edes = 14.4 kcal/mol, first order desorption reaction, H: Ni = 1.6—1.88) while hydrogen dissolution in the Ni lattice and its copper alloy increases (Edes= 32.9 kcal/mol, second order desorption reaction, H: Ni = 2.0).

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Authors and Affiliations

  1. Sokolsky Institute of Organic Catalysis and Electrochemistry, Almaty, 050010, Republic of Kazakhstan

    K. Dossumov, N. M. Popova, R. Kh. Salakhova, S. A. Tungatarova, A. A. Shapovalov & A. K. Umbetkaliev

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  1. K. Dossumov
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  2. N. M. Popova
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  3. R. Kh. Salakhova
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  4. S. A. Tungatarova
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  5. A. A. Shapovalov
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  6. A. K. Umbetkaliev
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Corresponding author

Correspondence to S. A. Tungatarova.

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Original Russian Text © K. Dossumov, N.M. Popova, R.Kh. Salakhova, S.A. Tungatarova, A.A. Shapovalov, A.K. Umbetkaliev, 2010, published in Zhurnal Fizicheskoi Khimii, 2010, Vol. 84, No. 3, pp. 555–558.

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Dossumov, K., Popova, N.M., Salakhova, R.K. et al. Desorption of hydrogen from Ni—Cu—Cr catalyst on (θ + α-Al2O3 sorbent modified with cerium. Russ. J. Phys. Chem. 84, 481–484 (2010). https://doi.org/10.1134/S0036024410030234

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  • DOI: https://doi.org/10.1134/S0036024410030234

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