Stability and Hydrogen Affinity of Graphite-Supported Wires of Cu, Ag, Au, Ni, Pd, and Pt

Stability and Hydrogen Affinity of Graphite-Supported Wires of Cu, Ag, Au, Ni, Pd, and Pt
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石墨负载 Cu、Ag、Au、Ni、Pd 和 Pt 线材的稳定性和氢亲和力

DOI:
10.1021/jp406361s
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发表时间:
2013
影响因子:
3.7
通讯作者:
W. Schmickler
W. Schmickler
中科院分区:
化学3区
文献类型:
--
作者:
G. Soldano;P. Quaino;E. Santos;W. Schmickler

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采用密度泛函理论研究了石墨台阶上Cu、Ag、Au、Ni、Pd和Pt纳米线的稳定性。两个步骤的边界检查:扶手椅和锯齿形。结果发现,Ni,Pd和Pt线是更稳定的比钴金属的,锯齿形配置是最积极的青睐。还研究了氢在这类体系上的吸附。在Ni、Pd和Pt石墨支撑的导线中,反应发生在导线上,而在钴金属导线中,氢直接吸附在石墨台阶上,破坏导线和台阶之间的键合。我们的研究结果表明,在线形成的早期阶段,氢吸附可以诱导从石墨的钴金属的解吸。比较了石墨支撑纳米线和自支撑纳米线对氢吸附的催化性能。
The stability of Cu, Ag, Au, Ni, Pd, and Pt nanowires supported on graphite steps is investigated by density functional theory. Two step borders are examined: armchair and zigzag. It was found that the Ni, Pd, and Pt wires are more stable than coinage metal ones and that the zigzag configuration is the most energetically favored. The adsorption of hydrogen on such systems is also studied. In Ni, Pd, and Pt graphite-supported wires the reaction occurs on the wire, while in coinage metal wires hydrogen adsorbs directly on graphite steps, breaking the bond between wire and step. Our results suggest that, in early stages of wire formation, hydrogen adsorption could induce the desorption of coinage metals from graphite. The catalytic properties for hydrogen adsorption on graphite-supported and freestanding nanowires are also compared.
石墨边缘上金和铂纳米线的稳定性。
DOI: --
发表时间: 2010
期刊: ChemPhysChem
影响因子: 2.9
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