The PtPb 0.56 nanodisks/C is also more active for CH 3 OH reformation than PtPb hexagonal nanoplates/C and PtPb 0.58 nanoparticles/C. X-ray photoelectron spectroscopy (XPS) results reveal that the high ratio of Pt (0) to Pt (II) in Pt-Pb nanodisks/C enhances the CH 3 OH reformation to H 2, while the high content of Pb (0) is beneficial for ...

2015年1月1日 · The Pt 3 Pb–PtPb core–shell NPs were characterized by analyzing their crystal structures with powder X-ray diffraction (pXRD), hard X-ray photoemission spectroscopy (HX-PES), and transmission electron microscopy (TEM). The synthesized NPs exhibited enhanced catalytic activity and relatively stable cycle performance towards methanol (MeOH ...

2006年7月1日 · The surface composition of bulk electrodes made from the ordered intermetallic phases PtBi and PtPb has been studied by ex-situ X-ray photoelectron spectroscopy (XPS) after being subjected to various electrochemical treatments.

2008年9月15日 · Platinum (Pt) and platinum-lead (PtPb) nanoparticles supported on Vulcan XC-72 carbon are prepared by polyalcohol reduction of platinum acetylacetonate and lead acetylacetonate in octyl ether. The catalysts are characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS).

2019年10月29日 · The surface composition and valence state of three Pd 3 Pb/Pt n Pb nanocubes were analyzed using the X-ray photoelectron spectroscopy (XPS) technique. The Pt 4f and Pb 4f XPS spectra were calibrated with respect to the binding energies (BEs) of the C 1s peak of graphite at 284.5 eV, as shown in Figure 2 .

2023年9月29日 · 近日，厦门大学卜令正和黄小青等在金属间化合物Pt-Pb/Pt纳米片表面构建了亚单层氧化锑催化剂 (PtPb/Pt@sub-SbOx NP)用于增强FAOR。 表面亚单层SbOx与金属间化合物的结合使得它们表现出优异的FAOR性能: PtPb/Pt@sub-SbOx纳米粒子的FAOR比活性和质量活性 (28.7 mA cm-2和7.2 A mgPt-1)分别比商业Pt/C高151和60倍； 此外，该催化剂在恒定电压下连续运行7000秒后仍然保持最高的电流，并且经过稳定性测试后，其结构没有发生明显变化，表 …

2023年8月16日 · The sub-monolayer SbO x on the surface can effectively attenuate the CO generation, largely improving the FAOR performance of PtPb/Pt@sub-SbO x NPs. This work develops a class of high-performance Pt-based anodic catalyst for DFAFC via constructing the unique intermetallic core/sub-monolayer shell structure.

The enhancement of the ORR activity on the PtPb NPs/TiO 2 /CSCNT is considered to be related to a change of the surface structures of PtPb NPs. Therefore, in this study, the effects of the support materials on ORR activity were examined by comparing the electronic states and surface atomic ratios of Pb to Pt atoms of the PtPb NPs on TiO 2

2023年8月21日 · FAOR过程的相应动力学研究表明，独特的亚单层SbOx结构使PtPb/Pt@sub-SbOxNPs能有效抑制HCOOH的脱水和CO的生成，使HCOOH连续脱氢生成CO2。 该工作通过构建独特的金属间核/亚单层壳结构，开发了一类用于DFAFC的高性能Pt基阳极催化剂。

所制备的金属间PtBi纳米片在甲醇氧化反应（MOR）中展现出优异的催化性能和良好的稳定性能，最大的质量活性高达4.09 A·mg Pt-1，接近商业Pt/C的3.2倍。 计时电流-时间（I - t）稳定性测试之后，活性仅仅衰减5.7%，远低于商业Pt/C。 CO吸附-脱附（CO-Stripping）曲线和循环伏安演变（CV-Evolution）曲线证实了金属间PtBi纳米片高的CO耐受性。 Abstract: We prepared an intermetallic PtBi nanoplate with high CO tolerance by thermal injection.