2 Scientists Trace Gold's Inertness to Crystal Surfaces, Not Atomic Structure
Updated
Updated · Ars Technica · Jun 9
2 Scientists Trace Gold's Inertness to Crystal Surfaces, Not Atomic Structure
2 articles · Updated · Ars Technica · Jun 9
Summary
Gold’s resistance to oxidation and weak catalytic behavior stem from the surfaces its crystals form, the scientists argue, rather than from an inherently unreactive atom.
That challenges the standard account that gold’s reactive electrons are simply shielded by filled outer orbitals, a model the report says could not fully explain the metal’s chemistry.
Gold nanoparticles exposed the gap in that explanation because they can act as catalysts even though bulk gold surfaces remain largely inactive.
The finding reframes a long-running materials-science puzzle by shifting attention from atomic electron structure to surface geometry when explaining why gold behaves differently from silver, copper and platinum.