As shown in Figure 1 b, the high-resolution TEM (HRTEM) image provides the crystal structure of PdNPs. It shows that PdNPs exposed two kinds of crystal facets, which are attributed to Pd (111)...

2025年2月6日 · In-situ transmission electron microscopy (TEM) studies reveal key insights into the structural and chemical evolution of nanoparticles (NPs) under external stimuli like heating and biasing, which is critical for evaluating their suitability in chemical reactions and their tendency towards forming novel NP systems.

2001年9月10日 · In the present work, we report a study of the structure of Pd clusters grown by colloidal methods using high resolution TEM, fast Fourier transforms of images, modeling of the structure and molecular dynamics calculations. Palladium clusters have been studied by a number of groups using TEM (see for instance, [7], [8], [9], [10]).

TEMPO是一种非常有效的氧化催化剂，能将 伯醇 和 仲醇 氧化成所需的 羰基 化合物。 具有产率高、选择性好、稳定性良好、可循环使用等特点。 稳定性：稳定。 远离强酸与强氧化剂。 需冷藏。 它具有捕获 自由基 、猝灭 单线态氧 和 选择性氧化 等功能。 在高分子化学中用作 自由基捕获剂 、 阻聚剂 、 抗老化剂 、热降解抑制剂和光、热稳定剂，也能与活性链自由基结合为共价休眠种。 共价休眠种可再均裂为链自由基，再增长。 在有机合成中用作各种醇和多元醇类氧化反应 …

tempo是一个可以稳定存在的n-氧自由基，常用作 esr自由基俘获剂 、自由基反应抑制剂和阻聚剂。 TEMPO可催化将伯醇氧化为醛或者羧酸以及将仲醇氧化为酮的反应。

2022年10月19日 · Using operando transmission electron microscopy, we show that Pd NPs exhibit periodic round–to–flat transitions altering their facets during CO oxidation reaction at atmospheric pressure and...

2008年2月29日 · In this study, the structure of Au–Pd nanoparticles prepared by the sonochemical technique is directly investigated by an analytical transmission electron microscopy with annular dark field scanning transmission electron microscopy (ADF-STEM) method. 2. Experimental. Bimetallic Au–Pd particles were prepared by the sonochemical techniques [6], [7].

We demonstrate an atomic scale TEM observation of shape evolutions of Pd nanocrystals under oxygen and hydrogen environments at atmospheric pressure. Combined with multi-scale structure reconstruction model calculations, the reshaping mechanism is fully understood.

2022年3月23日 · In this study, we synthesized metastable hexagonal close-packed (hcp) PdH x nanoparticles by liquid cell TEM using a graphene liquid cell (GLC) 8.

通过透射电子显微镜（TEM）和选择区域电子衍射（SAED）研究了在873 K的乙烯中加热过程中Pd / CeO 2催化剂，Pd黑和Pd 3 Ce合金中积碳的形态和分布。 在Pd / CeO 2催化剂中形成丝状碳，其微观结构强烈取决于催化剂在氢气中还原的温度。 在673和773 K下还原的样品产生的长丝表现出“晶须状”的生长模式（金属颗粒位于细丝的尖端），而在973和1100 K下还原的样品产生的“挤出样”长丝（Pd颗粒为位于底部，附着在二氧化铈微晶上。 减少Pd / CeO 21200 K下的催化剂 …