Exafs pt-o
WebApr 5, 2001 · On the Cl-free catalyst, only Pt-Pt and Pt-O bonds were detected from the EXAFS results, while on the Cl-containing catalyst additional Pt-Cl bonds were present. The effect of chlorine on activity strongly depended on the reactant concentration. Exposure of the Cl-free catalyst to higher concentrations of methane (3 vol.% CH{sub 4}) reduced the ... Web考虑到非金属杂原子的电子结构调节能力，通过杂原子掺杂以调控Ce单原子的局部配位微环境，有望带来ORR性能的重大突破。. 同时，精确调控杂原子配位RE基SACs的局部微环 …
Exafs pt-o
Did you know?
WebJul 15, 2006 · EXAFS results in Fig. 7 suggest no significant change in Pt morphology at that period except some replacement of Cl-ligand by O-ligand and a slight decrease in Pt–O + Pt–Cl coordination number. Chen et al. demonstrated that Pt(II) species can be obtained by reducing Pt(IV)Cl 2− 6 by ethylene glycol, and the UV–visible absorbance at 266 ... WebThe k²-weighted Fourier transformed EXAFS signal of Pt(acac)2/Mg(In)(Al)O x calcined to 650 °C and bulk PtO 2 reference show similar profiles. However, the PtO 2 structure is inadequate to model this experimental signal, in contrast to a three shell model containing a Pt-O, Pt-O-Mg and Pt-O-Mg-O shell.
WebJan 30, 2024 · EXAFS corresponds to the oscillating part of the spectrum to the right of the absorption edge (appearing as a sudden, sharp peak), starting at roughly 50 eV and extending to about 1000 eV above the … WebApr 12, 2024 · （b）在Pt-TiO 2 、PtCu-TiO 2 、Pt和PtO 2 的LIII边缘的k 2 EXAFS光谱的傅立叶变换。（c）电子顺磁共振谱。（d）TiO 2 和（e）PtCu-TiO 2 在黑暗和光照过程中的Ti L边和O K边光谱。（f）样品在光照射下的Ti L边缘或O K边缘强度与在暗条件下的强度比值。 图5：反应机理
Web2O) 3] +1, which, upon 24 h of aging, becomes [PtCl 2(OH) 2(H 2O) 2] 0 at pH 2.40 [3]. Fourier transforms of EXAFS spectra of 200-ppm Pt solutions at various pH values are shown in Fig. 1. The spectrum of CPA in HCl at a pH of 1.5 is characteristic of [PtCl 6]-2, while at a pH of 12 in NaOH, the average Pt coordination is 1.8 Pt-Cl and 4.2 Pt-O ... WebSep 21, 2014 · Shon等[39】用同步辐射（EXAFS）对Pt／Ti02催化剂研究认为，高温氢 处理后H2和CO吸附能力的降低不是由于从载体发生大量电子转移造成 的，而是由于更细微和特殊的电子结构变化，即在Pt金属簇和Ti02表面接 触的地方，表面的一些Pt，O和Ti原子发生 …
Web遇鑫遥/罗其全AFM：一石五鸟！等离子体激活加Ru单原子掺杂，协同增强Ni(OH)2析氢性能
WebAnalysis of the extended X-ray absorption fine structure (EXAFS) spectra proved decoration and encapsulation of the Pt particles by the CeO 2 /Ce 2 O 3 support or a partial Ce–Pt … movies on fandango to rentWebDec 12, 2024 · Both Fourier and wavelet transform indicated the dominant existence of single-atom Pt species on HAP. The fitting results of EXAFS are summarized in Figure S6 and Table S1. The coordination number of Pt–O for 0.2Pt 1 /HAP was 4.1, meaning that each Pt atom coordinates to approximately four oxygen atoms. The modification of 0.2Pt … heath ledger date of deathWebEXAFS is listed in the World's largest and most authoritative dictionary database of abbreviations and acronyms. EXAFS - What does EXAFS stand for? The Free … movies on egyptian pyramidWebAug 11, 2024 · The EXAFS peak positions of H 2 O 2 -Pt/Ti–FS at the Ti K edge show a lack of changes, whereas they exhibit some changes in Pt/Ti–FS during heating from RT … movies on escape from prisonWebAug 16, 2012 · 金属Pt是最有效的甲烷同系聚合催化剂，因此本工作以P灯MCM一1作为甲烷同系聚合反应的催化剂，通过制备一系列具有不同硅铝比和表面性质的MCM4 载体，研究载体性质对甲烷解离活化的能力和对C2+高碳烃生成的催化活性及产物选择性的影响，以此寻求 … movies on elizabethWebJul 25, 2002 · On the Cl-free oxidation catalyst, Pt-Pt and Pt-O bonds were detected using EXAFS, suggesting that the reduced metal particles are not fully oxidized under the reaction conditions. Additionally, chemisorption of CO by the oxidized catalyst indicates that a portion of the reduced Pt atoms is exposed to the reactants. On the Cl-containing ... movies on fandorWebOct 9, 2024 · Pt L III -edge EXAFS Pt-O bond coordination Number vs. Applied voltage for pure H 2 at the cathode of Pt/C. MEA temperature: blue triangle is 80°C, black triangle is 105°C, red triangle is 120°C. movies on elvis presley