PdRu/CNTs synthesized by microwave‐assisted method for high stable acidic oxygen evolution reaction

Abstract

Abstract It is the most efficient way to solve the sluggish kinetics of anodic oxygen evolution reaction during water electrolysis and realize rapid high‐purity hydrogen production by designing high performance oxygen evolution reaction (OER) catalysts. Herein, we have designed a series of PdRu nanoparticles‐modified carbon nanotubes (PdRu/CNTs) by rapid solvent‐free microwave‐assisted method. In this process, CNTs were chosen as the substrate because of its highly stable structure and fast electron transfer. What's more, Pd and Ru have formed a PdRu alloy and occurred partial oxidation based on the analysis of X‐ray diffraction and X‐ray photoelectron spectra spectrums. Through the regulation of composition, Pd69Ru31/CNTs exhibit excellent OER performance in 0.1 M HClO4 with a lowest overpotential of 225 mV at the current density of 10 mA cm−2. In the meanwhile, the current density of Pd69Ru31/CNTs was almost unchanged after 10 h i‐t test, and the overpotential only occurred to 10 mV positive shift after 5000 testing cycles. This work provides a feasible way to design high performance Pd‐based OER catalysts.

Keywords

• CNTs
• microwave
• oxygen evolution reaction
• PdRu alloy