Enhanced hydrogen evolution via nano-patterned Pt-based metallic glass and dynamic copper oxide foam formation

Enhanced hydrogen evolution via nano-patterned Pt-based metallic glass and dynamic copper oxide foam formation

Hydrogen is a promising energy carrier for replacing fossil fuels, and hydrogen production via hydrogen evolution reaction (HER) is an environmentally friendly option if electrocatalysts with low overpotentials and long-term stability are used. In this work, the electrocatalytic performance of Pt57....

Full description

Saved in:
Bibliographic Details
Main Authors: Fei-Fan Cai, Baran Sarac, Adnan Akman, Juan J. Londoño, Selin Gümrükcü, Lukas Schweiger, Martin Hantusch, Jan Schroers, Andreas Blatter, Annett Gebert, Florian Spieckermann, Jürgen Eckert
Format: Article
Language:English
Published: Elsevier 2025-01-01
Series:Materials & Design
Subjects:
Metallic glass
Thermoplastic forming
Platinum alloys
Electrocatalysts
Hydrogen evolution reaction
Dynamic bubble templating
Online Access:http://www.sciencedirect.com/science/article/pii/S0264127524009055
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Hydrogen is a promising energy carrier for replacing fossil fuels, and hydrogen production via hydrogen evolution reaction (HER) is an environmentally friendly option if electrocatalysts with low overpotentials and long-term stability are used. In this work, the electrocatalytic performance of Pt57.5Cu14.7Ni5.3P22.5 bulk metallic glass (BMG) with flat, micro-patterned, and nano-patterned surfaces for HER in 0.5  M H2SO4 is studied. The nano-patterned Pt-BMG demonstrates outstanding long-term stability and self-improving behavior with a final overpotential of 150  mV and a Tafel slope of 42  mV dec−1 after 1000 linear sweep voltammetry (LSV) cycles, which is respectively 42 % and 37 % lower than in the first LSV cycle. X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) indicate the formation of a layer of CuO/Cu2O foam deposited on top of the nano-patterned surface during the stability test of 1000 LSV cycles. A three-step process is proposed to explain the formation of CuxO foam via dynamic hydrogen bubble templating (DHBT) electrodeposition from Cu dissolution of the Pt-BMG without using copper salt. This work provides a method to create CuxO foams that could be used for various applications. Moreover, nano-patterned BMGs with DHBT deposition offer a feasible strategy to synthesize metal or metal-oxide foams.
ISSN:0264-1275

Similar Items