fig2
Figure 2. Working mechanism of the thermopower enhancement in GdnHCl-CH-co-regulated thermocells (GCTCs). (A) UV-Vis absorption spectra of [Fe(CN)6]4-, and [Fe(CN)6]3-, with 50 mg mL-1 CH as the additive at 293 K and 343 K, respectively; (B) 1H NMR spectra tracking the evolution of CH dissolved in D2O-based [Fe(CN)6]3- electrolyte upon heating at 343 K, and 1H NMR spectra of the solution of CDH in D2O-based [Fe(CN)6]4- electrolyte at 343 K over time; (C) Schematic operation mechanism of thermocells with the additives of GdnHCl and CH. UV-Vis: Ultraviolet-visible; NMR: nuclear magnetic resonance.
