Metal nanoparticles supported on a nonconductive oxide undergo pH-dependent spontaneous polarization.

ABSTRACT: Electrochemical polarization, which often plays a critical role in driving chemical reactions at solid-liquid interfaces, can arise spontaneously through the exchange of ions and/or electrons across the interface. However, the extent to which such spontaneous polarization prevails at nonconductive interfaces remains unclear because such materials preclude measuring and controlling the degree of interfacial polarization via standard (i.e., wired) potentiometric methods. Herein, we circumvent the limitations of wired potentiometry by applying infrared and ambient pressure X-ray photoelectron spectroscopies (AP-XPS) to probe the electrochemical potential of nonconductive interfaces as a function of solution composition. As a model class of macroscopically nonconductive interface

SUBMITTER: Wesley TS 

PROVIDER: S-EPMC10321480 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature