Facile methodology to generate Cu2O/TiO2 heterojunction on FTO electrode for photoelectroreduction of nitrate

Felipe Matamala-Troncoso, Cuong Ky Nguyen, Douglas R. MacFarlane, Mauricio Isaacs, César Sáez-Navarrete

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4 Citations (Scopus)

Abstract

Easy and low-cost synthesis of a Cu2O/TiO2/FTO electrode is proposed. The Cu2O/TiO2 heterojunction was synthesized by sintering TiO2 nanoparticles on an FTO electrode surface, followed by a Cu2O electrochemical deposition step. Characterization of the electrode was performed by FE-SEM-EDX microscopy, Raman and UV–Vis DR spectroscopy, and electrochemical methods. The photoelectrochemical behavior was characterized, and the p-type character material was confirmed. The reduction of nitrate to nitrite was performed using the Cu2O/TiO2/FTO electrode under Xe lamp illumination with lower overpotentials than those commonly used in this electrochemical process. Nitrate/nitrite conversion was achieved with a promising result of about 22% conversion at −0.05 V RHE.

Original languageEnglish
Article number129663
Number of pages4
JournalMaterials Letters
Volume293
DOIs
Publication statusPublished - 15 Jun 2021

Keywords

  • CuO/TiO heterojunction
  • Nitrate reduction
  • Photoelectrocatalysis
  • Semiconductors
  • Solar energy materials

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