2019年10月15日 · Investigations of the surface chemical structure of the catalytic films, performed by X-ray photoelectron spectroscopy (XPS), revealed the presence of cobalt in different oxidation states: Co +3, Co +2, Co°, the content of which depends on the processing path.

2023年10月28日 · Ambient Pressure X-ray photoelectron spectroscopy (APXPS) was employed to follow the catalyst oxidation state, the adsorption of CO and reaction products. While the...

2019年6月15日 · Cobalt-promoted bismuth vanadate photocatalysts of variable cobalt content (0–1.0 wt.%) were synthesized and characterized with various techniques including BET, XRD, DRS, XPS and TEM. BiVO 4 exists in the monoclinic scheelite structure, while cobalt addition improves the absorbance in the visible region although it does not affect the band ...

2022年8月8日 · Here using operando X-ray absorption spectroscopy and density functional theory calculations, we provide quantitative near-surface structural insights into oxygen-evolving CoO x (OH) y...

2023年5月1日 · Here, we use a combination of operando ambient pressure scanning tunneling microscopy and ambient pressure X-ray photoelectron spectroscopy to investigate varying submonolayer coverages of CoO supported on Pt (111) under CO oxidation conditions.

The CoP@a-CoOx plate showed very high OER activity, i.e., an overpotential of 0.232 V at a 10 mA cm −2 current density (η 10 ), which surpassed those of the CoP b-plate and the CoCo- LDH-Ar ...

2023年8月15日 · In this study, potato starch and amorphous cobalt oxide were assembled into carbon aerogel by sol-gel method and high-temperature annealing (CoOx/PSCA). The connected porous structure of the carbon aerogel is conducive to HER mass transfer, and its structure can avoid the agglomeration of transition metals.

Deconvoluted narrow XPS spectra of (b) Co 2p, (c) C 1s, and (d) Mo 3d for CoMo10mMO4@CNF. from publication: Bimetallic CoMoO4 Nanosheets on Freestanding Nanofiber as Wearable Supercapacitors with...

Here we present CoO x /Ti electrocatalytic films deposited by thermal and plasma enhanced chemical vapor deposition (CVD) onto titanium substrates. We report electrochemical (EC), photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) measurements.

2023年11月29日 · 利用原位合成的方法制备了一系列MFI分子筛封装的CoOx@MFI催化剂，结合X. 丙烯是最重要的有机化工原料之一。 在页岩气资源广泛开发的推动下，丙烷脱氢 (PDH)是替代石脑油蒸汽裂解工艺生产丙烯的有效方法。 但目前工业催化剂PtSn/Al2O3和CrOx/Al2O3分别由于过高的成本和对环境的有害影响而面…