Highly active carbon nanotube supported iridium, copper, ruthenium catalysts for glucose electrooxidation


Er O. F. , DEMİR KIVRAK H.

ENERGY STORAGE, 2021 (Journal Indexed in ESCI) identifier

  • Publication Type: Article / Article
  • Volume:
  • Publication Date: 2021
  • Doi Number: 10.1002/est2.271
  • Title of Journal : ENERGY STORAGE
  • Keywords: copper, glucose electrooxidation, iridium, ruthenium, FUEL-CELL, HIGH-PERFORMANCE, PD NANOPARTICLES, GLASSY-CARBON, OXIDATION, OXIDE, ACID, ANODE, CO, ELECTROCATALYSTS

Abstract

Herein, carbon nanotube (CNT) supported ruthenium (Ru), iridium (Ir), and copper (Cu) catalysts at 0.1 to 20 wt% metal loading are prepared by the NaBH4 reduction method for glucose electrooxidation reaction (GER). These catalysts are successfully characterized by X-ray diffraction, scanning electron microscope, and N-2 adsorption-desorption measurements. Voltammetric measurements of these catalysts are taken using cyclic voltammetry and chronoamperometry techniques. The crystallite sizes of these catalysts are calculated as 2.53 nm for Ru/CNT, 2.94 nm for Ir/CNT, and 13.06 nm for Cu/CNT by using Scherrer equation. For GER, 10% Ru/CNT, 0.1% Ir/CNT, and 0.5% Cu/CNT catalysts have high current densities as 1.86 mA cm(-2) (160.6 mA mg(-1) Ru), 3.03 mA cm(-2) (23 857.2 mA mg(-1) Ir), and 1.12 mA cm(-2) (1768.8 mA mg(-1) Cu), respectively. These catalysts have also good stability. Results reveal that 10% Ru/CNT, 0.1% Ir/CNT, and 0.5% Cu/CNT catalysts are promising catalysts as direct glucose fuel cell anode catalysts.