Dual In Situ Laser Techniques Underpin the Role of Cations in Impacting Electrocatalysts.

ABSTRACT: Understanding the electrode/electrolyte interface is crucial for optimizing electrocatalytic performances. Here, we demonstrate that the nature of alkali metal cations can profoundly impact the oxygen evolution activity of surface-mounted metal-organic framework (SURMOF) derived electrocatalysts, which are based on NiFe(OOH). In situ Raman spectroscopy results show that Raman shifts of the Ni-O bending vibration are inversely proportional to the mass activities from Cs⁺ to Li⁺ . Particularly, a laser-induced current transient technique was introduced to study the cation-dependent electric double layer properties and their effects on the activity. The catalytic trend appeared to be closely related to the potential of maximum entropy of the system, suggesting a strong c

SUBMITTER: Hou S 

PROVIDER: S-EPMC9321024 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature