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You searched for: "Duan, Xuezhi" Remove constraint "Duan, Xuezhi" Subject term carbon Remove constraint Subject term: carbon
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1. In Situ Production of Ni Catalysts at the Tips of Carbon Nanofibers and Application in Catalytic Ammonia Decomposition

Author:
Duan Xuezhi,   et al.   ; Ji Jian; Qian Gang; Zhou Xinggui; Chen De; Yuan Weikang;     Show all 6 Authors
Source:
Industrial & Engineering Chemistry Research 2013 v.52 no.5 pp. 1854-1858
ISSN:
1520-5045
Subject:
ammonia; carbon; carbon monoxide; carbon nanofibers; catalysts; engineering; ethylene; gases; methane; nanoparticles; nickel; particle size; roots
Abstract:
... Ni-carbon nanofibers (Ni-CNFs) catalysts were synthesized in situ by the decomposition of carbon-containing gases (i.e., CH₄, CO, and C₂H₄) over Ni/Al₂O₃ catalyst and directly used to catalyze ammonia decomposition. The results showed that Ni nanoparticles were found to locate at the tips of CNFs when using CH₄ and CO as carbon sources, while they located at the roots of CNFs when using C₂H₄ as a ...
DOI:
10.1021/ie3024627

2. Promotional Effect of Carbon on Fe Catalysts for Ammonia Decomposition: A Density Functional Theory Study

Author:
Duan Xuezhi,   et al.   ; Ji Jian; Gong Xueqing; Qian Gang; Zhou Xinggui; Chen De; Yuan Weikang;     Show all 7 Authors
Source:
Industrial & Engineering Chemistry Research 2013 v.52 no.48 pp. 17151-17155
ISSN:
1520-5045
Subject:
activation energy; ammonia; carbon; catalysts; desorption; engineering; iron; methodology; terracing
Abstract:
... Density functional theory calculations have been performed to investigate the recombinative desorption of N on terraced Fe(100) and Fe(110) as well as stepped Fe(111) and Fe(211) surfaces. The results showed that the stepped surfaces, especially the Fe(111) surface, are more active than the terraced surfaces, which could be related to the presence of so-called C₇ sites for the stepped surfaces. Ca ...
DOI:
10.1021/ie4030165