TY - JOUR

T1 - Enhanced hydrogen evolution via nano-patterned Pt-based metallic glass and dynamic copper oxide foam formation

AU - Cai, Fei-Fan

AU - Sarac, Baran

AU - Akman, Adnan

AU - Londoño, Juan J.

AU - Gümrükcü, Selin

AU - Schweiger, Lukas

AU - Hantusch, Martin

AU - Schroers, Jan

AU - Blatter, Andreas

AU - Gebert, Annett

AU - Spieckermann, Florian

AU - Eckert, Jürgen

N1 - Publisher Copyright: © 2024 The Author(s)

PY - 2024/12/12

Y1 - 2024/12/12

N2 - 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.

AB - 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.

KW - Dynamic bubble templating

KW - Electrocatalysts

KW - Hydrogen evolution reaction

KW - Metallic glass

KW - Platinum alloys

KW - Thermoplastic forming

UR - http://www.scopus.com/inward/record.url?scp=85212337026&partnerID=8YFLogxK

U2 - 10.1016/j.matdes.2024.113530

DO - 10.1016/j.matdes.2024.113530

M3 - Article

AN - SCOPUS:85212337026

VL - 249.2025

JO - Materials and Design

JF - Materials and Design

SN - 0264-1275

IS - January

M1 - 113530

ER -