Oxidizing agents platinum compounds

Why Do We Need to Know This Material The d-block metals are the workhorse elements of the periodic table. Iron and copper helped civilization rise from the Stone Age and are still our most important industrial metals. Other members of the block include the metals of new technologies, such as titanium for the aerospace industry and vanadium for catalysts in the petrochemical industry. The precious metals—silver, platinum, and gold—are prized as much for their appearance, rarity, and durability as for their usefulness. Compounds of d-block metals give color to paint, turn sunlight into electricity, serve as powerful oxidizing agents, and form the basis of some cancer treatments. 

Platinum hexafluoride does not have many commercial apphcations. It is used as a strong oxidizing agent and can oxidize oxygen from the air. It is used in research. Platinum hexafluoride forms compounds with molecular oxygen and xenon, [02" ][PtF6 ] and XePtFe, respectively. 

Binary Compounds. Three fluorides, PtF4 [13455-15-7], PtF5 [37782-184-8], and platinum hexafluoride [136934)5-5], PtF., are well documented. The last is a powerful oxidizing agent and can oxidize dioxygen and xenon (235). Two chlorides exist, platinum dichloride [10025-65-7],... 

Fluorine can be produced only by electrolysis, and then only with difficulty. The complications involved in its production arise from the extreme chemical activity of this element. Of all the known elements, fluorine has the greatest affinity for electrons hence, it is the most powerful oxidizing agent (electron acceptor). Accordingly, fluorine cannot be prepared by the chemical oxidation of fluorine compounds, since this would require an oxidizing agent more powerful than fluorine. This element displaces oxygen from water, attacks all but the very unreactive metals such as platinum, and forms compounds with all ele-... 

Nitric acid is a strong oxidizing agent that reacts with alkali and basic materials as well as oxides. Concentrated nitric acid reacts violently with many organic compounds. Nitric acid attacks most metals except for platinum, gold, aluminum, and chromium steel. 

The first step in the GC determination of carbon and hydrogen is quantitative oxidation of the sample organic compounds, usually with a catalyst. Copper oxide is commonly used, but the reaction is relatively slow and elevated temperatures of about 900°C are required. With silver permanganate the reaction temperature is reduced to 550°C [34, 35] and with cobalt oxide to 750°C [36, 37] both compounds provide a shorter oxidation time. Other catalytic oxidizing agents, such as nickel oxide [38, 39] and cerium(IV) oxide [40], have been found promising. Platinum can also be used, especially when it is necessary to avoid the retention of any oxidation products by the solid catalyst. 

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