What metals are commonly used as working electrodes?

When considering metals commonly used as working electrodes, it's important to look at their electrochemical properties, stability, and conductive capabilities. Graphite, while not a metal, is often used due to its excellent conductivity and stable electrochemical behavior.

Praseodymium, on the other hand, is a rare earth metal that is less commonly used in electrode applications compared to more traditional choices like platinum, gold, or even graphite. When looking at electrode applications, factors such as the ability to form stable and reversible electrode reactions, corrosion resistance, and conductivity are crucial.

Platinum is highly favored for its durability and inertness, which allows for a wide range of electrochemical applications. Gold also possesses similar properties, making it a popular choice for various electrode applications.

The other options do not include metals that are typically recognized for their common use as working electrodes in electrochemistry. For example, copper and silver are more often used in other contexts, such as electrical wiring or as components of alloys, rather than as standalone working electrodes in electrochemical cells. Lead is not a preferred option due to issues regarding corrosion and stability in many environments.

Thus, while praseodymium and graphite were chosen, the more common metals used as working electrodes would typically be