Vine Shoots and Grape Stalks as Carbon Sources for Hydrogen Evolution Reaction Electrocatalyst Supports

Abstract

Activated bio-based carbons produced from vine shoots (VSAC) and grape stalks (GSAC), which have larger surface area and total pore volume than most of the commercially available activated carbons, are used as supports for palladium nanoparticles (Pd NPs). The prepared materials are characterised by elemental analysis, N 2 -sorption, X-ray diffraction, scanning electron microscopy with energy dispersive X-ray spectroscopy, and transmission electron microscopy analysis and are then assessed as potential cathodes for the hydrogen evolution reaction (HER) in alkaline media. The electrocatalysts' performance for HER is evaluated from cathodic polarisation curves at different temperatures and compared to that of Vulcan XC72-supported Pd NPs. Additional chronoamperometry studies helped to assess the electrocatalysts' activity stability. The novel VSAC-supported Pd electrocatalyst exhibits good HER activity in terms of high current density at low overpotentials, leading to the best performance.

Electrochemical Synthesis of Iron Oxide Nanoparticles for Biomedical Application

“…In previous studies, we successfully applied electrochemical techniques to synthesize nanoparticles, nano fibers, nanorods and nanoclusters. These nanomaterials have been used for the fabrication of high performance electrodes for water electrolysers, low temperature alkaline fuel cells and other energy devices [52][53][54][55][56][57][58][59][60][61][62][63][64][65].…”

Carbon-Doping as Efficient Strategy for Improving Photocatalytic Activity of Polysilicon Supported Pd in Hydrogen Evolution from Formic Acid

“…In this regard, transition metals such as Pt, Pd, Ru, Cu, and Co have been used in combination with a wide variety of organic and mineral compounds [2]. The Pd has been employed as an active catalyst for hydrogen generation combined with organic supports such as carbon-based materials [3]. While most of the Pd-catalyzed hydrogen generation reactions are focused on water splitting [4], Pd-based catalysts also efficiently promoted the degradation of formic acid (FA) [5], hydrazine [6], and amino borane [7].…”