High valence state of Ni and Mo synergism in NiS2-MoS2 hetero-nanorods catalyst with layered surface structure for urea electrocatalysis

MnOx/TiO2 catalysts are active and stable at low temperature, and it is appropriate for cement production to enforce NOx emissions. In this study, the denitration process was promoted by the transformation of a variety of MnOx forms in the SCR reaction. The efficiency and selectivity of catalysts depended on the form and dispersion degree of MnOx. By changing the precursors, calcination temperatures, synthesis methods and calcination atmospheres, a series of MnOx/TiO2 catalysts were prepared. The contents and distributions of Mn2+, Mn3+ and Mn4+ in catalysts were tested through the titration method. The titration results showed that the content of Mn4+ was the highest during the precursor was Mn (NO3)2, while the content of Mn2+ in the catalysts calcinated in nitrogen atmosphere was the highest. The mechanisms of different MnOx states in the catalytic process were discussed. It was found that a mixture of more MnOx with low valence state and less MnOx with high valence state were beneficial to the catalytic process.

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Investigations of defect structures and g factors for octahedral (CrO6)7− and (VO6)8− clusters in rutile-type crystals

Modern Physics Letters B ◽

10.1142/s0217984916501608 ◽

2016 ◽

Vol 30 (14) ◽

pp. 1650160

Author(s):

Lianxuan Zhu ◽

Minjie Wang

Keyword(s):

Electron Paramagnetic Resonance ◽

Valence State ◽

Defect Structures ◽

Paramagnetic Resonance ◽

Jahn Teller ◽

State Formula ◽

Jahn Teller Effect ◽

High Valence State ◽

Experimental Values ◽

Electron Paramagnetic

The electron paramagnetic resonance (EPR) [Formula: see text] factor formulas for Cr[Formula: see text] and V[Formula: see text] ions in Al2O3, TiO2 and VO2 crystals are deduced from Jahn–Teller effect and contributions of the charge transfer (CT) levels. The tetragonal distortions. [Formula: see text] and −0.0124 nm, and [Formula: see text], [Formula: see text] and 0[Formula: see text], for Al2O3:Cr[Formula: see text], TiO2:V[Formula: see text] and VO2, respectively. The calculations of the [Formula: see text] factors agree well with the experimental values. The contributions of the CT levels to [Formula: see text] factors increase with the increasing valence state. It must be taken into account in the precise calculations of [Formula: see text] factors for the high valence state [Formula: see text] ions in crystals.

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High-Valence-State NiO/Co3O4 Nanoparticles on Nitrogen-Doped Carbon for Oxygen Evolution at Low Overpotential

ACS Energy Letters ◽

10.1021/acsenergylett.7b00691 ◽

2017 ◽

Vol 2 (9) ◽

pp. 2177-2182 ◽

Cited By ~ 110

Author(s):

Muhammad Tahir ◽

Lun Pan ◽

Rongrong Zhang ◽

Yi-Cheng Wang ◽

Guoqiang Shen ◽

...

Keyword(s):

Oxygen Evolution ◽

Valence State ◽

Co3o4 Nanoparticles ◽

Nitrogen Doped ◽

High Valence State ◽

Low Overpotential ◽

Nitrogen Doped Carbon

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Efficient synergism of V2O5 and Pd for alkaline methanol electrooxidation

Chemical Communications ◽

10.1039/d1cc02934g ◽

2021 ◽

Author(s):

Jiaxin Li ◽

Yajun Chang ◽

Dongze Li ◽

Ligang Feng ◽

Baogang Zhang

Keyword(s):

Valence State ◽

Pd Nanoparticles ◽

Catalytic Performance ◽

Methanol Electrooxidation ◽

High Valence State

Efficient synergism of high valence state V and Pd nanoparticles imparted their high catalytic performance and anti-poisoning ability for alkaline methanol electrooxidation.

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