Remarkable electrochemical properties of electrochemically reduced graphene oxide towards oxygen reduction reaction are caused by residual metal-based impurities
- Lu Wang, Chun Kiang Chua, Bahareh Khezri, Richard D. Webster, Martin Pumera*
Oxygen reduction reaction (ORR) is one of the most important electrochemical reactions in the field of energy storage. Remarkable catalytic properties towards ORR at "metal-free" electrochemically reduced graphene oxide (ErGO) were previously reported. We demonstrate here that the remarkable enhancement towards ORR of a "metal-free" ErGO is caused by residual metallic impurities instead of ErGO itself. (c) 2015 Elsevier B.V. All rights reserved.
Catalytic hydrogen evolution reaction on “metal-free” graphene: key role of metallic impurities
Two-Dimensional Materials on the Rocks: Positive and Negative Role of Dopants and Impurities in Electrochemistry