There are many - Hg was used for many years, Sn, Co, Mn, Pb, Pt, Ir, Rh are now very common - I have also seen Vanadium used and even Lithium.
A catalysts speeds up the rate of a chemical reaction. An element is a single substance. The above are often used.
Not always, it can also be an element
Platinum, Palladium, Rhodium, etc.
An important example is platinum.
yttrium
The elements in the middle section of the Periodic Table are the transition in the Haber process; Nickel is a catalyst used in the manufacture of margarine.
Stimulants - but more probably catalyst.
I believe you are looking for the term "accelerant." A catalyst.
yes.. No. That's no. Heat controls the rate of reaction, but a catalyst is defined as a *chemical agent* (element/ compound) that alters the rate of reaction.
Silver is not an element found in catalytic converters. You can find platinum, which serves as a catalyst.
They have empty d orbitals.So they can adsorb electrons from substrate and act as catalysts
Catalytic converters are made of platinum-iridium catalyst or a ceramic monolith
base on what type of catalyst you are yalking about but all catalyst are made up of element which bonded together to form a funtional compound which are inert to the reaction but provided a alternative route in the particular reaction.