Gold vs. Silver vs. Platinum: Which Substrate Should You Choose?
A practical decision guide for electrochemistry, SERS/SPR, SAM formation, and catalysis research, matched to what each metal actually does well.
Three Metals, Three Different Strengths
Gold, silver, and platinum are all deposited by arrandee™ on the same borosilicate glass base, in the same standard sizes, but they aren't interchangeable in practice. Each metal behaves differently at the electrode surface and optically, and each holds up differently under real lab conditions, so the right choice depends on what you're measuring.
How to Use This Guide
Don't pick a metal because it's the "default" one; match it to the measurement you're actually running. Cyclic voltammetry, a thiol monolayer, maximum Raman signal enhancement, and a catalytic reaction each point toward a different substrate, and the comparison and the three sections below walk through why.
Gold vs. Silver vs. Platinum at a Glance
All three share the same borosilicate glass base and standard dimensions; what changes from row to row is the metal itself.
| Property | Gold (Au) | Silver (Ag) | Platinum (Pt) |
|---|---|---|---|
| Chemical stability in air | High – resists tarnishing | Oxidizes/tarnishes quickly | Very high – highly inert |
| Plasmonic field enhancement | Good | Strongest of the three | Weak |
| Thiol / SAM chemistry | Excellent, well characterized | Possible, less common | Not typical |
| Electrocatalysis (ORR, HER) | Largely inactive | Limited | Standard reference metal |
| Electrochemical window | Wide, well documented | Narrower, oxide formation | Wide, especially in acid |
| Typical relative cost | Lowest | Low | Highest |
| Flame annealing suitable | Yes | No – low melting point | Yes, with care |
| arrandee™ published research | ~99 confirmed papers | 2 confirmed papers | None confirmed yet |
Publication counts reflect our own literature review as of August 2026 and describe evidence of arrandee™-specific usage, not general suitability of the metal for a given technique.
When to Choose Which Metal
Matched to what you are actually trying to measure
Choose Gold When…
- You're forming thiol-based self-assembled monolayers (SAMs)
- You need atomically flat Au(111) terraces for AFM/STM
- You want a stable, well-documented electrode for general electrochemistry
- You need the widest published evidence base to reference
Choose Silver When…
- You need maximum SERS signal enhancement
- You're building an SPR (surface plasmon resonance) biosensor
- You're directly comparing gold vs. silver plasmonic response
- You can use the substrate promptly after opening (tarnishing risk)
Choose Platinum When…
- You're studying electrocatalysis (ORR, HER)
- You need a chemically inert electrode in aggressive acidic media
- You're building a platinized biosensor electrode
- You need a stable reference/counter electrode material
Frequently Asked Questions
Common questions when choosing between gold, silver, and platinum substrates
Should I use a gold, silver, or platinum electrode for cyclic voltammetry?
That comes down to the electrochemical window and chemistry your experiment needs. Gold gives you a wide, well-characterized potential window and excellent thiol/SAM chemistry, making it a solid general-purpose working electrode. For catalysis-related reactions such as hydrogen evolution and oxygen reduction, platinum is the standard choice, and it holds up better in aggressive acidic media. Silver, by contrast, oxidizes too readily to see much use as a working electrode in aqueous CV, though it's a strong performer as a plasmonic substrate.
Which metal is best for SERS or SPR (plasmonic) experiments?
For SERS, silver is usually the first choice; it produces the strongest plasmonic field enhancement of the common noble metals. Gold trades some of that peak enhancement for chemical stability and a longer shelf life, which is why it's the more common substrate for SPR biosensing, where staying stable over time matters more than squeezing out the last bit of signal.
Is platinum or gold better for catalysis research?
For electrocatalysis work, platinum is the standard substrate: oxygen reduction (ORR) and hydrogen evolution (HER) are the classic examples, and both reactions are largely inactive on a gold surface. If your research question is really about self-assembled monolayers, thiol chemistry, or SPM imaging rather than catalytic activity, gold is still the better fit.
Can I switch between gold, silver, and platinum substrates for the same experiment series?
Yes, and this is one of the reasons researchers run comparative studies across metals in the first place. All three arrandee™ substrates share the same borosilicate glass base, the same standard 11 x 11 mm and 12 x 12 mm dimensions, and the same packaging, so you can reuse the same sample geometry and holder setup regardless of which metal you're running.
