Controllable Synthesis of PdSe2 Noncontinuous Nanomaterial Thin-Film Electrodes for Photoelectrochemical Application.

PdSe2 nanomaterials, characterized by their layered structure, high specific surface area, and tunable bandgap, exhibit remarkable advantages in optoelectronic devices, energy storage, and other fields. This paper focuses on the CVD synthesis of PdSe2 nanomaterials through four distinct selenation methods. The feasibility of product preparation is verified by SEM (Product morphology) and EDS (confirming the Pd/Se atomic ratio). Besides, the Raman scattering spectra are further utilized to confirm that the product is PdSe2 through definite characteristic peaks at 162 cm-1 (Eg modes) and 259 cm-1 (Ag modes). PdSe2, as one of the candidates for photoelectrode materials, has demonstrated excellent photoelectrochemical properties. The results of this paper indicate that, under visible light irradiation (λ = 400-800 nm), the photocurrent density exhibits a nonlinear correlation with light intensity (10-50 mW/cm2), reaching 0.008 mA/cm2 at optimal conditions, and it has good photocurrent stability.