NbO 6 octahedra of high-dimensional Nb 2 O 5 boosting H 2 O 2 electrosynthesis for sewage pollutants degradation
Year: 2025
Type: article
Abstract: Two-electron oxygen reduction reaction (2e− ORR) to produce hydrogen peroxide (H2O2) presents an efficient, secure, and sustainable method. However, the competing four-electron pathway produces H2O, yielding low H2O2 selectivity (~ 70%). In this work, a high-dimensional rod-like structure of niobium oxide (Nb2O5-HD) containing NbO6 octahedra was synthesized using a hydrothermal method combined with a calcination strategy. Under 50 mA·cm−2, the Faradaic efficiency (FE) of H2O2 reached 94%, with the H2O2 yield reaching as high as 874 mmol·gcat−1·h−1. After 34 h of operation, FE was still 76%, and the stability is great. In situ Raman spectroscopy analysis and experiments revealed that the NbO6 octahedra on Nb2O5-HD were the key factor for its excellent ORR activity and H2O2 FE. This inspires the development of high-performance ORR transition metal electrocatalysts.
Source: Nano Research
Authors: Bingxue Cheng, Xinlin Wang, Shijia Li, Yuhang Li, Toru Murayama, Tamao Ishida, Guangli Xiu, Kenji Iida, Yufan Fu, Yining Wang, Mingyue Lin
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $5,290
OpenAlex ID: W7077060912