Formation of different types nanoporous composite structure by dealloying of Ag and Ni containing Al-Cu-Ti base amorphous precursor alloys

Abstract

The effect of minor addition of Ag and Ni on the dealloying behavior, nanoporous structure, and electrocatalytic property has been investigated using Al₄₅Cu₄₅Ti₁₀ amorphous precursor alloy. The dealloying kinetics is significantly suppressed due to low diffusion rate and enhanced passivation effect by addition of Ag and Ni. Two different types of nanoporous composite structure are fabricated, nanoporous Cu incorporated with Ag particles and bi-metallic nanoporous Cu-Ni. The resulting multi-component nanoporous composites exhibit improved electrocatalytic property for BH₄⁻ oxidation. This study offers a strategy for fabricating nanoporous composites to replace precious metal electrocatalysis.

논문정보

Materials Characterization  Volume 175, May 2021, 111093

Received 17 December 2020, Revised 18 March 2021, Accepted 1 April 2021, Available online 2 April 2021.

Authors: Jae-Ik Hyun, Heug-Soo Noh , Kyeongho Kong, Won Tae Kim, Do Hyang Kim

DOI : https://doi.org/10.1016/j.matchar.2021.111093