Interaction of alkali acetates with silica supported PdAu

Hanrieder Elisabeth K.; Jentys Andreas; Lercher Johannes A.

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Interaction of alkali acetates with silica supported PdAu

机译：互动与硅碱醋酸盐支持PdAu

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摘要

The temperature dependence of the interaction of PdAu alloy particles with alkali acetate promoters (MOAc; M+ = Li+, Na+, K+, Cs+) was studied by X-ray absorption and infrared spectroscopy as well as in situ X-ray diffraction. Alkali acetate promotion on PdAu particles results in irreversible enlargements of the Pd-Pd distances upon heating compared to promoter free PdAu/SiO2. The promoter induces the migration of Pd to the metal particle surface and the formation of a mixed Pd/M+-O layer on the surface of the bimetallic PdAu particles. This structure enhances catalytic reactions by electronically and geometrically modifying the PdAu surface.

机译：之间的相互作用对温度的依赖关系与碱醋酸PdAu合金颗粒promoters (MOAc;研究了x射线和红外线吸收光谱法以及原位x射线衍射。粒子导致不可逆转的放大Pd-Pd距离在加热相比子免费PdAu /二氧化矽。Pd迁移到粒子表面和金属形成一个混合Pd / M + o层上双金属表面PdAu粒子。结构增强催化反应电子和几何修改PdAu表面。

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来源
《Catalysis science & technology》 |2016年第19期|7203-7211|共9页
作者
Hanrieder Elisabeth K.; Jentys Andreas; Lercher Johannes A.;
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作者单位

Tech Univ Munich, Dept Chem, Lichtenbergstr 4, D-85747 Garching, Germany;

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原文格式 PDF
正文语种英语
中图分类
关键词
temperature dependence; Electronics; Hypertrophyinfrared spectroscopyHeatingX-ray absorptionmetal particlesPDAUSurfacesAcetates;

机译：温度依赖;电子HypertrophyinfraredspectroscopyHeatingX-ray absorptionmetalparticlesPDAUSurfacesAcetates;

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Interaction of alkali acetates with silica supported PdAu

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