NO reduction utilizing complex oxide catalysts

Photocatalytic degradation of 4-chlorophenol (4-CP) was investigated with a series of TiO2 and TiO2 doped with Ag and Au. Experiments were carried out in both batch and continuous reactors under an 11 W low pressure mercury lamp. Total organic carbon (TOC) was used as an indicator in addition to the concentration of 4-CP for the effectiveness of the degradation. In the batch reactor, a catalyst was suspended in aqueous 4-CP solution. Interestingly, 4-CP degradation did not depend on the catalyst used compared to photolysis. On the contrary, the presence of any of the catalyst significantly affected the intermediates, hydroquinone and hydroxyhydroquinone, degradation. Degussa P25 showed higher catalytic activity than the synthesized TiO2 and in some cases TiO2 doped with a precious metal in terms of TOC degradation. The addition of the precious metal to TiO2 did not improve the 4-CP degradation but it did on the degradation of the intermediate products. Degussa P25 was dip-coated on stainless steel mesh and used in the continuous reactor. With the continuous reactor, experimental conditions could be set so that complete degradation could be achieved.

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Effects of rare earth metal doping on Au/ReZrO2 catalysts for efficient hydrogen generation from formic acid

New Journal of Chemistry ◽

10.1039/d0nj06124g ◽

2021 ◽

Vol 45 (12) ◽

pp. 5704-5711

Author(s):

Luming Wu ◽

Yu Hao ◽

Shaohua Chen ◽

Rui Chen ◽

Pingchuan Sun ◽

...

Keyword(s):

Catalytic Activity ◽

Rare Earth ◽

Rare Earth Metal ◽

Oxygen Vacancies ◽

Hydrogen Generation ◽

Earth Metal ◽

Support Interaction ◽

Metal Support Interaction ◽

Metal Support ◽

Metal Doped

Rare earth metal doped ZrO2 can promote the formation of oxygen vacancies in zirconia, which enhances the metal–support interaction, finally promoting catalytic activity of FA dehydrogenation.

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Catalytic Activity of the Transition-Metal Atom Doped Platinum Surface for NO Reduction by CO

The Journal of Physical Chemistry C ◽

10.1021/acs.jpcc.0c11313 ◽

2021 ◽

Author(s):

Hong Wen ◽

Hao Sun ◽

Xin Jin ◽

Jing-yao Liu

Keyword(s):

Catalytic Activity ◽

Transition Metal ◽

Metal Atom ◽

No Reduction ◽

Transition Metal Atom ◽

Platinum Surface ◽

No Reduction By Co

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Electronic structure modulation of NiS2 by transition metal doping for accelerating the hydrogen evolution reaction

Journal of Materials Chemistry A ◽

10.1039/c8ta11286j ◽

2019 ◽

Vol 7 (9) ◽

pp. 4971-4976 ◽

Cited By ~ 21

Author(s):

Tongtong Wang ◽

Xiaosong Guo ◽

Jingyan Zhang ◽

Wen Xiao ◽

Pinxian Xi ◽

...

Keyword(s):

Electronic Structure ◽

Catalytic Activity ◽

Transition Metal ◽

Hydrogen Evolution Reaction ◽

Systematic Study ◽

First Principles ◽

Transition Metal Doping ◽

First Principles Calculations ◽

Structure Modulation ◽

Metal Doped

We give a systematic study of the HER catalytic activity of transition metal doped NiS2 by first principles calculations and experiments.

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Genesis of Precious Metal Mineralization in Intrusions of Ultramafic, Alkaline Rocks and Carbonatites in the North of the Siberian Platform

Minerals ◽

10.3390/min11040354 ◽

2021 ◽

Vol 11 (4) ◽

pp. 354

Author(s):

Anatoly M. Sazonov ◽

Aleksei E. Romanovsky ◽

Igor F. Gertner ◽

Elena A. Zvyagina ◽

Tatyana S. Krasnova ◽

...

Keyword(s):

High Temperature ◽

Siberian Platform ◽

Precious Metal ◽

Native Gold ◽

Precious Metals ◽

Ore Formation ◽

Central Type ◽

Alkaline Rocks ◽

The North ◽

Pge Mineralization

The gold and platinum-group elements (PGE) mineralization of the Guli and Kresty intrusions was formed in the process of polyphase magmatism of the central type during the Permian and Triassic age. It is suggested that native osmium and iridium crystal nuclei were formed in the mantle at earlier high-temperature events of magma generation of the mantle substratum in the interval of 765–545 Ma and were brought by meimechite melts to the area of development of magmatic bodies. The pulsating magmatism of the later phases assisted in particle enlargement. Native gold was crystallized at a temperature of 415–200 °C at the hydrothermal-metasomatic stages of the meimechite, melilite, foidolite and carbonatite magmatism. The association of minerals of precious metals with oily, resinous and asphaltene bitumen testifies to the genetic relation of the mineralization to carbonaceous metasomatism. Identifying the carbonaceous gold and platinoid ore formation associated genetically with the parental formation of ultramafic, alkaline rocks and carbonatites is suggested.

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