期刊
APPLIED SURFACE SCIENCE
卷 498, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2019.143842
关键词
Molybdenum oxides; PdMo; Ethylene glycol; Electrocatalysis; Oxygen vacancies
类别
资金
- Mexican Council of Science and Technology (CONACYT) [299058, FOFI2018, FIN201906]
In this work, Pd-MoOx nanomaterials were developed changing the Mo/Pd precursor ratio and tested for ethylene glycol electro-oxidation reaction (EGOR) in alkaline medium. Mo atomic % compositions of 0, 15, 35, 45 and 75 at. % were evaluated. The increase of Mo at. % resulted in morphology changes due to the directing effect of hexadecyltrimethylammonium bromide (CTAB) on molybdenum passing from hemispheres to nanobelts + hemispheres (15 at. % Mo denoted as Pd85Mo15), then only nanobelts (35 at. % Mo, Pd65Mo35), and nanosheets (45 at. % Mo, Pd55Mo45), and hemispheres were newly obtained at the higher Mo concentration (75 at. % Mo, Pd25Mo75). The activity evaluation of EGOR at 60 degrees C indicated that Pd25Mo75 supported on Vulcan carbon (Pd25Mo75/C) displayed the highest current density (63.80 mA cm(-2)), and according with X-ray photoelectron spectroscopy (XPS) the highest activity of Pd25Mo75/C can be related to the abundance of Mo5+ species, which have oxygen vacancies with a single positive charge. Additionally, the analysis of O 1s core-level corroborated the abundance of oxygen with high number of defects sites. Thereby, it was found that Pd loading can be decreased without comprising the activity by increasing oxygen vacancies of MoOx as co-catalyst.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据