Work

Adsorbed Hydrogen as a Site-Occupying Species in the Electrocatalytic Oxidation of Formate on Pd/C in Alkaline Medium

Year: 2018

Type: article

Abstract: We investigate the mechanistic origin of oxidation of HCOO − on Pd/C in alkaline media using H/D kinetic isotope effect studies and electrochemical experiments, such as cyclic voltammetry, step-linear sweep voltammetry, and stripping voltammetry. We reveal that HCOO − is oxidized to CO 2 through a direct pathway, and the oxidation of H ads is the rate determining step. The slow oxidation kinetics of H ads , which causes a site-occupying effect, suppress the oxidation of HCOO − , and a more distinct phenomenon is observed in the potential region for H ads . These observations provide clues to understanding the significant electrocatalytic activity of Pd and rational approaches for the development of more active catalysts for the oxidation of HCOO − in alkaline media.

Source: Journal of The Electrochemical Society

DOI: 10.1149/2.0341815jes

Authors: Myounghoon Choun, Sujik Hong, Jaeyoung Lee

Institution: Gwangju Institute of Science and Technology

Language: English

Topic: Electrocatalysts for Energy Conversion

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $1,950