Cobalt and cobalt carbide on alumina/NiAl(110) as model catalysts
Cobalt and cobalt carbide on alumina/NiAl(110) as model catalysts
复制标题
氧化铝/NiAl(110) 上的钴和碳化钴作为模型催化剂
DOI:
10.1039/c7cy01806a
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发表时间:
2017-12
影响因子:
5
通讯作者:
Niemantsverdriet J. W.
中科院分区:
文献类型:
--
作者:
Zhang Tianfu;Wu Jingsong;Xu Yuqun;Wang Xiaoping;Ni Jun;Li Yongwang;Niemantsverdriet J. W.
Cobalt is an important catalyst for Fischer–Tropsch synthesis, and it can form cobalt carbide under syngas (CO + H2) reaction conditions, especially in CO-rich mixtures. As cobalt carbide has been credited as a promoter which brings about significant selectivity changes in CO hydrogenation, we are interested in studying it using a surface science approach, to understand its interaction with important reaction intermediates. In the present study, we use a NiAl(110) surface to produce a flat alumina film and prepare cobalt and cobalt carbide thereon. We find that cobalt is thermally stable up to 800 K on alumina/NiAlIJ110). Different preparation temperatures result in different morphologies of the surface. Cobalt carbide is obtained by evaporating cobalt in an C2H4 environment, as proved by the appearance of a C 1s peak at 283.3 eV of carbidic carbon and at 286.2 eV of chemisorbed CO on cobalt carbide in the XPS spectra. Large cobalt carbide crystals with a typical size of 100 nm × 50 nm are revealed by STM. The results show that cobalt.and cobalt carbide on alumina/NiAlIJ110) can serve as suitable model systems for studying structures, adsorption and catalytic properties.
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影响因子:
1.9
作者:
J. Libuda;F. Winkelmann;M. Bäumer;H. Freund;T. Bertrams;H. Neddermeyer;K. Müller
通讯作者:
J. Libuda;F. Winkelmann;M. Bäumer;H. Freund;T. Bertrams;H. Neddermeyer;K. Müller
影响因子:
12.9
作者:
Pei, Yan-Peng;Liu, Jin-Xun;Li, Wei-Xue
通讯作者:
Li, Wei-Xue
影响因子:
3.7
作者:
Christensen, A;Ruban, AV;Besenbacher, F
通讯作者:
Besenbacher, F
影响因子:
1.9
作者:
F. Winkelmann;S. Wohlrab;J. Libuda;M. Bäumer;D. Cappus;M. Menges;K. Al‐Shamery;H. Kuhlenbeck;H. Freund
通讯作者:
F. Winkelmann;S. Wohlrab;J. Libuda;M. Bäumer;D. Cappus;M. Menges;K. Al‐Shamery;H. Kuhlenbeck;H. Freund
影响因子:
3.3
作者:
A. Carlsson;M. Naschitzki;M. Bäumer;H. Freund
通讯作者:
A. Carlsson;M. Naschitzki;M. Bäumer;H. Freund