Enhanced corrosion resistance of NbTaMoW medium entropy alloy coatings in simulated PEMFC environments: Experimental and computational insights

Document Type

Journal Article

Publication Title

Corrosion Science

Volume

240

Publisher

Elsevier

School

School of Engineering

RAS ID

75979

Funders

National Natural Science Foundation of China (52075245)

Comments

Jiang, M., Xu, J., Liu, C., Xie, Z. H., & Munroe, P. R. (2024). Enhanced corrosion resistance of NbTaMoW medium entropy alloy coatings in simulated PEMFC environments: Experimental and computational insights. Corrosion Science, 240. https://doi.org/10.1016/j.corsci.2024.112499

Abstract

An anti-corrosive and conductive NbTaMoW medium entropy alloy (MEA) coating was deposited on 304 stainless steel using a dual-cathode glow discharge technology. This MEA coating exhibits a single body-centered cubic phase with about 10 nm grains, and forms a passivation film with significantly enhanced corrosion resistance at any given HF concentration. The lower adsorption energy of Nb atoms for oxygen atoms leads to the enrichment of Nb oxides in the passivation film, which is beneficial for hindering the rapid diffusion of F− ions. These findings underscore the potential of NbTaMoW MEA coatings to improve the durability and efficiency of PEMFCs.

DOI

10.1016/j.corsci.2024.112499

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