Oxygen reduction at chalcogenide model surfaces

硫族化物模型表面的氧还原

• 批准号: 184693688
• 负责人: Professor Dr. Helmut Baltruschat
• 金额: --
• 依托单位: Abteilung Elektrochemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/184693688?language=en
• 关键词: Oxygen; reduction; chalcogenide; model; surfaces

Carbon supported Ru-Se nanoparticles have been widely studied as catalysts for oxygen reduction, because of their insensitivity towards poisoning by methanol. However, completely missing are fundamental studies on well defined single crystalline surfaces of Se modified Ru, although the surface structure of these can be determined more accurately than that of nanoparticles. With the lack of knowledge about the surface structure of these catalysts, one can only speculate about their mechanism of action. In this project, it is therefore intended to prepare well defined surfaces of Ru (and also Rh) modified by Se (and also S, Te) through adsorption at different potentials, or from the gas phase at different temperatures, possibly followed by an annealing step. The different catalyst surfaces shall be characterised mainly by STM and XPS. The number of active Ru (Rh) sites shall be titrated by adsorption of CO and metal upd (e.g. of Gu). The catalytic activity shall be tested by DEMS and the rotating ring disc electrode assembly.

碳负载的Ru-Se纳米粒子由于对甲醇中毒不敏感，作为氧还原催化剂得到了广泛的研究。然而，尽管可以比纳米颗粒更准确地确定Se修饰Ru的表面结构，但对于定义良好的单晶表面的基础研究是完全缺失的。由于缺乏对这些催化剂表面结构的了解，人们只能推测它们的作用机理。因此，在这个项目中，它的目的是通过在不同的电势下或在不同的温度下从气相中吸附Se(以及S、Te)来修饰Ru(以及Rh)，或者在可能的退火步之后从气相中制备稳定的Ru(以及Rh)表面。不同的催化剂表面应主要用STM和XPS进行表征。活性Ru(Rh)位的数量应通过吸附CO和金属UPD(例如，Gu)来滴定。催化活性应通过DEM和旋转环盘电极组件进行测试。

项目成果

Quantitative Determination of H2Se at Model Metal fcc(111) Selenide Surface: DEMS, STM, and AFM Studies

模型金属 fcc(111) 硒化物表面 H2Se 的定量测定：DEMS、STM 和 AFM 研究

• DOI: 10.1021/acs.jpcc.5b06635
• 发表时间: 2015
• 期刊: Journal of Physical Chemistry C
• 影响因子: 3.7
• 作者: Shahid Iqbal;Christoph Bondü;Helmut Baltruschat
• 通讯作者: Helmut Baltruschat

Oxygen Reduction on Rh(111) and Se-Modified Rh(111) Surfaces

Rh(111) 和 Se 修饰的 Rh(111) 表面的氧还原

• DOI: 10.1007/s12678-017-0407-5
• 发表时间: 2018
• 期刊: Electrocatalysis
• 影响因子: 3.1
• 作者: Shahid;Baltruschat;Helmut
• 通讯作者: Helmut

Surface morphological studies of Nafion®/Pt(100) interface

Nafion®/Pt(100) 界面的表面形态研究

• DOI: 10.1016/j.electacta.2014.08.086
• 发表时间: 2014
• 期刊: Electrochimica Acta
• 影响因子: 6.6
• 作者: S. Iqbal;N. Podgaynyy;M. Ahmed;G. A. Attard;H. Baltruschat
• 通讯作者: H. Baltruschat