2006年10月1日 · XRD results show that the structure of PtW nanoparticles is composition dependent with a predominate face centered cubic structure for tungsten content less than ∼65%. Phase segregation was observed for PtW alloys with higher tungsten content.

2010年5月1日 · XRD data for carbon-supported PtW alloy nanoparticles prepared by the RME method alloyed at different temperatures in comparison with a benchmark Pt/C catalyst. α-W peaks are marked by asterisks (*).

2021年12月15日 · CDs/POMs exhibit excellent catalytic activity of HOR in acid with low Pt loading. POMs can be used as an ideal model system to construct Pt single-atom catalyst. CDs can effectively improve the mass transfer rate of HOR. TPV tests, Butler-Volmer formulation and in situ XAS were used to explore the dynamics process of charge transfer.

2022年11月14日 · Well alloyed PtW phase and uniform size distribution are important to achieve high activity for oxygen reduction reaction (ORR). The prepared, carbon supported PtW alloys are twice more active than commercial Pt/C for ORR in acid electrolyte, and will be the potential candidate as cathode electrocatalyst for PEMFCs.

Indexing XRD patterns correspond to the face-centered-cubic (FCC) lattice of Pt (JCPDF 04-0802), Pd (JCPDF 46-1043) and PdPt alloy (JCPDF 65-6418) structures. ... ... analysis of the position of...

2006年6月28日 · The morphology and particle size of the prepared alloy catalysts were characterized by high resolution electron transmission microscopy (HRTEM), high angle annular dark field-scanning transmission electron microscopy (HAAF-STEM), and X-ray diffraction (XRD). The electrocatalytic activity of PtW alloys were examined by rotation disk electrode ...

合成的合金纳米粒子通过x射线衍射（xrd）和透射电子显微镜（tem）进行表征，并进行电化学分析以分析其在酸性电解质中对分子氧电还原的活性。 还研究了合成参数对PtW纳米粒子尺寸的影响。

The synthesized alloy nanoparticles were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), and electrochemically analyzed for activity towards molecular oxygen electroreduction in an acidic electrolyte. The influence of synthesis parameters on the size of PtW na

2006年6月28日 · 通过旋转圆盘电极（rde）技术检测了 ptw 合金的电催化活性。 结果表明，PtW 电催化剂的粒径和形貌很大程度上取决于合成方法。 良好的合金化 PtW 相和均匀的尺寸分布对于实现氧还原反应 (ORR) 的高活性非常重要。

It was shown that the strong surface segregation tendency of Pt in Pt−W alloys and the peculiar electronic effect of W to Pt allow facile formation of stable Pt-enriched surfaces with likely better-than-Pt ORR activity at Pt-lean alloys such as PtW 2, in contrast to the previously reported Pt alloy ORR electrocatalysts which mostly have to be ...