Concave cubic PtLa alloy nanocrystals with high-index facets: Controllable synthesis in deep eutectic solvents and their superior electrocatalytic properties for ethanol oxidation
Concave cubic PtLa alloy nanocrystals with high-index facets: Controllable synthesis in deep eutectic solvents and their superior electrocatalytic properties for ethanol oxidation
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具有高折射率面的凹立方PtLa合金纳米晶：在低共熔溶剂中的可控合成及其对乙醇氧化的优异电催化性能
DOI：
10.1016/j.jpowsour.2018.07.102
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发表时间：
2018-09
影响因子：
9.2
通讯作者：
Shi-Gang Sun
中科院分区：
文献类型：
--
作者：
Sheng Xiang;Li Wang;Cong-Cong Huang;You-Jun Fan;Hua-Guo Tang;Lu Wei;Shi-Gang Sun
由于其强的电子相互作用和优异的电化学性能，贵金属基稀土纳米合金被认为是燃料电池应用中有前途的电催化材料。然而，由于稀土金属非常负的还原电位的限制，贵金属/稀土纳米合金的湿化学或电化学制备仍然具有挑战性。在此，我们报道了一种新的有效的策略，在深共晶溶剂中电化学合成凹立方PtLa合金纳米晶，该纳米晶具有高折射率晶面和上级的乙醇氧化电催化性能。扫描电子显微镜和透射电子显微镜表征证实，凹立方PtLa合金纳米晶体的尺寸约为47.5 nm的均匀电沉积在玻璃碳基板上的深共晶溶剂，并与{410}和相邻的高折射率小面的约束。X射线光电子能谱分析表明，在凹立方PtLa合金纳米晶中存在着很强的从La到Pt原子的电荷转移相互作用。由于高折射率晶面的协同效应以及Pt和La之间的电荷转移相互作用，所合成的凹立方PtLa合金纳米晶对乙醇氧化反应表现出增强的比电流活性和长期的耐久性。
Due to their strong electronic interactions and excellent electrochemical properties, noble metal-based rare earth nanoalloys are considered to be promising electrocatalytic materials for fuel cell applications. However, due to the limitation of the very negative reduction potential for rare earth metals, the wet chemical or electrochemical preparation of noble metal/rare earth nanoalloys is still challenging. Herein, we report a novel and effective strategy for the electrochemical synthesis in deep eutectic solvents of concave cubic PtLa alloy nanocrystals with high-index facets and superior electrocatalytic properties for the ethanol oxidation reaction. Scanning electron microscopy and transmission electron microscopy characterizations confirm that the concave cubic PtLa alloy nanocrystals of approximately 47.5 nm in size are uniformly electro-deposited on the glassy carbon substrate in deep eutectic solvents and are bounded with the {410} and adjacent high-index facets. X-ray photoelectron spectroscopy analysis indicates the presence of strong charge transfer interactions from La to Pt atoms in the concave cubic PtLa alloy nanocrystals. Due to the synergetic effect of the high-index facets and the charge transfer interactions between Pt and La, the synthesized concave cubic PtLa alloy nanocrystals exhibit enhanced specific current activity and long-term durability for the ethanol oxidation reaction.
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影响因子：
6.6
作者：
Weijiang Zhou;M. Li;Lan Zhang;S. Chan
通讯作者：
Weijiang Zhou;M. Li;Lan Zhang;S. Chan
单分散亚5.0 nm PtCu纳米合金作为增强型双功能电催化剂用于氧还原反应和乙醇氧化反应
影响因子：
6.7
作者：
Taiyang Liu;Kai Wang;Qiang Yuan;Zebin Shen;Ye Wang;Qinghong Zhang;Xun Wang
通讯作者：
Xun Wang
DOI：
10.1039/c3cp51183a
发表时间：
2013-07
期刊：
Physical chemistry chemical physics : PCCP
影响因子：
--
作者：
P. Corradini;E. Antolini;J. Perez
通讯作者：
P. Corradini;E. Antolini;J. Perez
影响因子：
15
作者：
Hsin, Yu Lin;Hwang, Kuo Chu;Yeh, Chuin-Tih
通讯作者：
Yeh, Chuin-Tih
影响因子：
32.5
作者：
S. Yoo;S. Hwang;June-Gunn Lee;Seung-Cheol Lee;T. Lim;Y. Sung;A. Wiȩckowski;Soo‐Kil Kim
通讯作者：
S. Yoo;S. Hwang;June-Gunn Lee;Seung-Cheol Lee;T. Lim;Y. Sung;A. Wiȩckowski;Soo‐Kil Kim