图2 材料表征图谱:(a) PtNi&Ni@Ni-N-C和PtNi@Ni-N-C的XRD谱图。(b) PtNi&Ni@Ni-N-C与PtNi@Ni-N-C的Ni 2p XPS谱比较。(c) PtNi&Ni@Ni-N-C和PtNi@Ni-N-C的pt4f XPS光谱比较。(d) Pt L边的R空间图谱。(e) Ni K边的R空间图谱。(f) PtNi@Ni-N-C的R空间EXAFS拟合曲线。 图3 催化材...
The results showed that PtNi nanoparticles were formed with a Pt-enriched alloy surface as confirmed by XRD, H2-TPR (temperature-programmed H2 reduction), XPS (X-ray photoelectron spectroscopy), and H2-TPD (temperature-programmed H2 desorption). The surface features of these nano-particles were ...
dissoluted Pt in the alloy nanoparticles. As also shown in the spectrum, the W species still exist on the carbon black after the stability test. In addition, one may find that there are some other impurity elements on the carbon. Combining the above information, it can be seen that the a...
Chenyue Wang1, Cheng Zhu1, Xiaoxing Ke3 *, Jiajing Pei4, Juncai Dong4, Qi Chen1, Haibo Jin1, Maorong Chai2, Yujing Li1 * HIGHLIGHTS • A hybrid electrocatalyst consisting of PtNi-W alloy nanocrystals loaded on carbon surface with atomically dispersed W sites ...
A carbon supported PtNi/C electrocatalyst synthesized via a polyol process was characterized by XRD, TEM and voltammetry techniques. The XRD analysis showe... QG Sun - 《Catalysis Communications》 被引量: 55发表: 2010年 Density Functional Theory Study of Anode Reactions on Pt-Based Alloy Electrod...
To enhance ORR performance and reduce Pt usage, a Pt-transition metal alloy catalyst has been developed. Alloying Pt with a second metal on a carbon support material can improve activity due to the change in lattice parameter and the electronic effect. According to the d-band theory, the ...
The successful synthesis of PtNi alloy catalyst was proved by XRD and other characterization methods. The electrochemical properties of the above electrocatalysts were investigated using CV, LSV and other testing methods. The results show that PtNi-4 alloy catalyst exhibits excellent catalytic activity ...
Monodisperse stone-like PtNi alloy nanoparticles (NPs) were synthesized at room temperature using an inverse microemulsion method. The results of XRD, HRTEM, and EDS demonstrate that these NPs consist of a disordered alloy that has (a) a face-centered cubic structure, (b) Pt/Ni atomic ratios ...
In this study, development of polyol reduction method of depositioning simultaneously Pt and Ni in carbon surface while hindering the agglomerations of alloy particles was carried out. The prepared catalyst was characterized by X-Ray Diffraction (XRD), Energy Dispersive X-ray (EDX) analysis and ...
XRD, TEM and XPS analysis have also been performed. IR spectra of adsorbed CO indicate that the surface of the PtNi catalysts is dominated by Pt centers, whose electron-withdrawing character is increased by Ni. It has also been confirmed the formation of PtNi alloy, which is enriched at the...