TEM images of RuCr and CoRuCr samples deposited at different oxygen flow rate ratios and pressures. The scale bar in all the images measures 20 nm. CoRuCr-oxide based intermediate layers have...

Transmission electron cryomicroscopy (CryoTEM), commonly known as cryo-EM, is a form of cryogenic electron microscopy, more specifically a type of transmission electron microscopy (TEM) where the sample is studied at cryogenic temperatures (generally liquid-nitrogen temperatures). [1]

2024年4月24日 · 与日益成熟的冷冻电镜单颗粒技术一同，冷冻电镜断层成像技术cryo-ET（cryo-electron tomography）和子断层图像平均法STA（sub-tomogram average）也正在悄然崛起。 这两者将结构生物学引向解析柔性超大分子复合物结构、细胞原位蛋白结构等方向，应用范围广泛，覆盖蛋白复合物、病毒、细菌、细胞甚至组织，最高分辨率已达3Å ，是名副其实的跨尺度高分辨显微成像利器。

2023年2月1日 · High-resolution transmission electron microscopy (HR-TEM) and scanning transmission electron microscopy (STEM) are shown for three samples in Figure S8. The nanoparticles have an average particle size of ∼10 nm with a spherical shape suitable for electrocatalytic applications.

Transmission electron cryo-microscopy (cryoEM) is a versatile tool in the structural analysis of proteins and biological macromolecular assemblies. In this review, we present a brief survey of the methods used in cryoEM, and their current developments.

2024年11月18日 · 本文在酸性介质的氧析出反应（OER）电催化领域取得了重要突破，提出了全新的异质双活性位点氧化物路径机制（Oxide Pathway Mechanism, OPM）。 该机制通过直接偶联双氧自由基，规避了传统吸附进化机制（AEM）和晶格氧参与机制（LOM）在活性和稳定性上的固有局限，为酸性介质中的OER反应开辟了新路径。 此外，作者制备了具有高活性的Cr0.6Ru0.4O2固溶氧化物催化剂。 通过引入铬（Cr）作为路易斯酸位点，该催化剂增强了对 …

2023年10月15日 · The porous feature of Ru-CoO, which originates from the interconnected secondary nanosheets, can be confirmed by transmission electron microscopy (TEM) in Fig. 1 b. Such a fascinating architecture can not only increase the accessible active sites, but accelerate the mass/electron transport and gas diffusion during the electrocatalytic process ...

透射电子显微镜（Transmission electron microscope, TEM）是使用最为广泛的电子显微镜之一，和扫描电子显微技术共同组成了电子显微学的“两大支柱”。TEM的测试原理是利用透过样品的电子进行成像和结构分析，由于…

The optimized RuO 2 /Co 3 O 4 –RuCo-EO electrode with a Ru loading of 0.064 mg cm −2 exhibits excellent electrocatalytic performance with a low overpotential of 220 mV at the current density of 10 mA cm −2 and a low Tafel slope of 59.9 mV dec −1 for the OER.

2025年2月26日 · A Petrobras registrou um lucro líquido de 36,6 bilhões de reais em 2024, uma queda de 70,6% em relação a 2023, informou a empresa na noite desta quarta-feira 26. No quarto trimestre do ano passado, a companhia apresentou prejuízo líquido de 17 bilhões de reais, revertendo o lucro registrado em igual período um ano antes.