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
复制
发表时间:
2017-12
影响因子:
5
通讯作者:
Niemantsverdriet J. W.
Niemantsverdriet J. W.
中科院分区:
化学2区
文献类型:
--
作者:
Zhang Tianfu;Wu Jingsong;Xu Yuqun;Wang Xiaoping;Ni Jun;Li Yongwang;Niemantsverdriet J. W.

文献摘要

参考文献

被引文献

相似文献

钴是费托合成的重要催化剂,在合成气(CO + H2)反应条件下,特别是在富含CO的混合物中,可以形成碳化钴。由于碳化钴被认为是一种促进剂,可以在 CO 加氢过程中带来显着的选择性变化,因此我们有兴趣使用表面科学方法对其进行研究,以了解其与重要反应中间体的相互作用。在本研究中,我们使用NiAl(110)表面制备平坦的氧化铝薄膜并在其上制备钴和碳化钴。我们发现钴在氧化铝/NiAlIJ110 上的热稳定性高达 800 K。不同的制备温度会导致不同的表面形貌。碳化钴是通过在 C2H4 环境中蒸发钴而获得的,XPS 光谱中碳化物碳的 283.3 eV 处和碳化钴上化学吸附的 CO 的 286.2 eV 处出现 C 1s 峰证明了这一点。 STM 显示了典型尺寸为 100 nm × 50 nm 的大碳化钴晶体。结果表明,氧化铝/NiAlIJ110 上的钴和碳化钴可以作为研究结构、吸附和催化性能的合适模型系统。
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.
DOI: 10.1016/0039-6028(94)90341-7
发表时间: 1994-10
期刊: Surface Science
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
通过钴金属/碳化物界面的费托反应合成高级醇
DOI: 10.1021/acscatal.5b00791
发表时间: 2015-06-01
期刊: ACS CATALYSIS
影响因子: 12.9
作者:
Pei, Yan-Peng;Liu, Jin-Xun;Li, Wei-Xue
通讯作者: Li, Wei-Xue
DOI: 10.1103/physrevb.56.5822
发表时间: 1997-09-01
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者:
Christensen, A;Ruban, AV;Besenbacher, F
通讯作者: Besenbacher, F
DOI: 10.1016/0039-6028(94)91556-3
发表时间: 1994-04
期刊: Surface Science
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
DOI: 10.1021/jp021966v
发表时间: 2003
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