(a, b) Co 2p 3/2 , (c, d) P 2p, and (e) S 2p XPS spectra of (a, c) CoP ...
The XPS plot of Co 2p demonstrated that the overall curve swung toward the low binding energy after polysulfide adsorption, which might be caused by the creation of CoS X after the interaction of...
Space Confinement to Regulate Ultrafine CoPt Nanoalloy for …
2023年5月10日 · As shown in the high-resolution X-ray photoelectron spectroscopy (XPS) of Co 2p (Figure S4, Supporting Information), Co 0, Co 3+ and Co 2+ signals occur at 778.6, 779.8, and 783.1 eV, respectively. The dominant Co 2+ and Co 3+ species in CoZ-60TEA indicate that a large amount of Co-N x species form during high-temperature pyrolysis.
In situ study of oxidation states and structure of 4 nm CoPt …
2012年3月17日 · In situ near edge X-ray absorption fine structure (NEXAFS) spectroscopy and ambient pressure X-ray photoelectron spectroscopy (AP-XPS) were performed to monitor the oxidation state and structure of 4 nm CoPt nanoparticles during the reaction of CO with O 2 – a model oxidation reaction.
Efficient electrocatalytic overall water splitting of porous 3D CoPt
2024年3月1日 · Density flooding theory (DFT) calculations combined with XPS results confirm the existence of partial charge transfer from CoPt 3 to the substrate FeCoW oxide, and the excellent electrical conductivity makes CoPt 3 /FCWO-NS essential to …
CO2 Hydrogenation Studies on Co and CoPt Bimetallic ... - Springer
2011年8月5日 · Near edge X-ray absorption fine structure (NEXAFS) spectroscopy was used to elucidate the oxidation state of the catalyst under reaction conditions while the effect of reducing H2 gas on the composition and structure of the bimetallic PtCo nanoparticles was measured using ambient pressure X-ray photoelectron spectroscopy (AP-XPS) and ...
(Color online) XPS spectra of (a) Co 2p, (b) O 1s, and (c) Pt 4f for ...
XPS analysis of the chemical bonding states present on the surface of CoPt before and after O 2 plasma surface modi- fication and exposure to ACAC, HFAC, EDTA, NTA, PDCA, OA, and formic acid is...
Integrated CoPt electrocatalyst combined with upgrading anodic …
2022年6月1日 · In this work, we report an integrated bifunctional electrocatalyst composed of CoPt nanoparticles uniformly distributed on the carbon nanosheet array (CNs@CoPt), which exhibits excellent activity for both cathodic hydrogen evolution in a wide range of pH conditions and anodic glycerol oxidation reaction.
(a) Survey XPS spectra of GO and rGO/CoPt/Ag, (b) XPS spectra …
High-angle annular dark-field scanning TEM (HAADF-STEM) and EDS mapping were applied to study the elemental distribution of rGO/CoPt/Ag. The results are shown in Figure 5a-e: C, Ag, Co, and Pt...
天津大学Junfeng Zhang和Yan Yin课题组--基于空间限域效应的小尺寸CoPt …
在此，提出了一种空间限域方法制备小尺寸、高稳定性CoPt纳米合金催化剂的策略。该制备策略分为两个步骤，首先，在ZIF-67前驱体颗粒表面包裹SiO 2 壳层，使ZIF-67热解过程中，Co原子的迁移受到SiO 2 壳层的抑制，从而缩小了Co纳米颗粒的粒径。随后，基于上述Co ...
CO 2 Hydrogenation Studies on Co and CoPt Bimetallic …
近缘X射线吸收精细结构（NEXAFS）光谱用于阐明反应条件下催化剂的氧化态，同时减少H 2的作用使用环境压力X射线光电子能谱（AP-XPS）和环境透射电子显微镜（ETEM）测量了气体对双金属PtCo纳米颗粒的组成和结构的影响。 NEXAFS表明，在相关反应条件下，Pt有助于将Co还原为金属态，而AP-XPS和ETEM表明，通过与变得缺乏Pt的地下层交换，Pt在表面富集，这与“类Pt在这些材料的催化测试过程中看到的选择性。 更新日期：2011-08-05.
- 某些结果已被删除