Carbon fiber paper supported nano-Pt electrode with high electrocatalytic activity for concentrated nitric acid reduction

摘要

A high-performance electrode for the electrocatalytic reduction of concentrated nitric acid is developed from an electrode based on carbon fiber paper supported Pt nanoparticles (nano-Pt/CFP). The nano-Pt/CFP electrode exhibits remarkable electrocatalytic reactivity at room temperature (488.6 mA mg(-1) for nanopolyhedral Pt, and 384.9 mA mg(-1) for nanothorn Pt) with a significant reduction in Pt usage compared with conventional Pt electrodes (0.0190 mA mg(-1) for Pt sheet or 03667 mA mg(-1) Pt mesh) and commercial Pt/C (288.5 mA mg(-1)). The mechanism is discussed based on the electrochemical voltammograms and the composition of gaseous products, indicating a homogeneous autocatalysis process with NO and N2O as the main products. (C) 2017 Elsevier B.V. All rights reserved.