Article 2023 · 12 citations

Highly Efficient Oxygen Electrode Obtained by Sequential Deposition of Transition Metal-Platinum Alloys on Graphene Nanoplatelets

Mladenovic, Dusan, Das, Elif, Santos, Diogo M. F., Yurtcan, Ayse Bayrakceken, Sljukic, Biljana

Abstract

A set of platinum (Pt) and earth-abundant transition metals (M = Ni, Fe, Cu) on graphene nanoplatelets (sqPtM/GNPs) was synthesised via sequential deposition to establish parallels between the synthesis method and the materials' electrochemical properties. sqPtM/GNPs were assessed as bifunctional electrocatalysts for oxygen evolution (OER) and reduction (ORR) reactions for application in unitised regenerative fuel cells and metal-air batteries. sqPtFe/GNPs showed the highest catalytic performance with a low potential difference of ORR half-wave potential and overpotential at 10 mA cm(-2) during OER, a crucial parameter for bifunctional electrocatalysts benchmarking. A novel two-stage synthesis strategy led to higher electrocatalytic performance by facilitating the reactants' access to the active sites and reducing the charge-transfer resistance.

Keywords

alloy nanoparticles graphene nanoplatelets oxygen reduction reaction oxygen evolution reaction bifunctional electrocatalyst REDUCTION REACTION EVOLUTION REACTION SURFACE-AREA ELECTROCATALYSTS CARBON IRON CATALYSTS NANOPARTICLES PTNI FE

WoS Categories

Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Physics, Applied Physics, Condensed Matter

Sustainable Development Goals

Affordable and Clean Energy

Citation

Journal: MATERIALS
Year: 2023
Volume: 16
Issue: 9
eISSN: 1996-1944
DOI: 10.3390/ma16093388
WoS UID: WOS:000987555000001

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