Enhancing the Selectivity of H2O2 Electrogeneration by Steric Hindrance Effect

Xue Xiao; Tianjiao Wang; Juan Bai; Fumin Li; Tianyi Ma; Yu Chen

doi:10.1021/acsami.8b17283

Enhancing the Selectivity of H₂O₂ Electrogeneration by Steric Hindrance Effect

ACS Appl Mater Interfaces. 2018 Dec 12;10(49):42534-42541. doi: 10.1021/acsami.8b17283. Epub 2018 Nov 27.

Authors

Xue Xiao¹, Tianjiao Wang, Juan Bai, Fumin Li, Tianyi Ma¹, Yu Chen

Affiliation

¹ Discipline of Chemistry , The University of Newcastle , Callaghan , NSW 2308 Australia.

PMID: 30421905
DOI: 10.1021/acsami.8b17283

Abstract

Selective hydrogen peroxide (H₂O₂) electrogeneration by oxygen reduction reaction (ORR) is an efficient and promising synthetic method for H₂O₂ production. Herein, we build a particular inorganic-organic interface to enhance the electrocatalytic selectivity of reduced graphene oxide (rGO) aerogels for H₂O₂ electrogeneration by modifying rGO aerogels with polyethyleneimine (PEI). The three-dimensional porous structure of aerogels and the steric hindrance effect of PEI on rGO endow PEI-functionalized rGO (rGO/PEI) aerogels with enhanced selectivity (90.7%), production rate (106.4 mmol g_cat^-1 h^-1), and durability for H₂O₂ electrogeneration by the two-electron pathway of ORR.

Keywords: H2O2 electrogeneration; inorganic−organic interface; oxygen reduction reaction; selectivity; steric hindrance effect.