in the repository
URN to cite this document: urn:nbn:de:bvb:703-epub-9087-8
Title data
Attia, Mina ; Zhao, Chen ; Lindner, Miriam ; Hawe, Philipp ; Roth, Christina:
Engineering Hierarchically Nano-Structured Cu Foams : Dynamic Hydrogen Bubble Templated Binder-Free Freestanding Electrodes for Energy Applications.
In: Small.
Vol. 22
(2026)
Issue 8
.
- e09389.
ISSN 1613-6829
DOI der Verlagsversion: https://doi.org/10.1002/smll.202509389
![[thumbnail of Small - 2025 - Attia - Engineering Hierarchically Nano‐Structured Cu Foams Dynamic Hydrogen Bubble Templated Binder‐Free.pdf]](https://epub.uni-bayreuth.de/style/images/fileicons/application_pdf.png) |
|
||||||||
|
Download (9MB)
|
Project information
| Project title: |
Project's official title Project's id Confinement-Effekte bei der CO2-Elektroreduktion - mechanistische Untersuchungen an oberflächenaktiven, porösen Cu-Elektroden 495717797 Open Access Publizieren No information |
|---|---|
| Project financing: |
Deutsche Forschungsgemeinschaft |
Abstract
The intelligent design of hierarchical metallic structures with optimized performance for targeted applications, such as energy devices, sensors, and catalysis, remains a significant challenge. In this study, electrochemically generated hydrogen bubbles are employed as dynamic negative templates for copper electrodeposition. This so-called dynamic hydrogen bubble templating approach (DHBT) yields highly porous hierarchical copper foams adorned with surface nano-structures. A comprehensive investigation of DHBT synthesis parameters is provided, organized into four categories: (1) deposition current density and time; (2) current modes, namely direct, pulsed, reversed, and alternating regimes; (3) physical conditions, including stirring and temperature; and (4) bath composition. The results demonstrate that morphological descriptors, such as pore size and density, foam thickness, electrochemically active surface area (ECSA), and nanoscale surface features, can be systematically and reproducibly tuned by varying these DHBT parameters. As a proof of concept, a simple three-step protocol for the fabrication of copper foam gas diffusion electrodes (GDEs) is presented. The resulting GDEs show promising CO2 reduction performance, achieving C2+ products Faradaic efficiencies of approximately 50% at -1.1 V versus reversible hydrogen electrode (RHE) and partial current densities of up to 104 mA cm−2 at -2.5 V versus RHE, with good operational stability tested for 12 h.
Further data
| Item Type: | Article in a journal |
|---|---|
| Keywords: | binder-free nano-structures; CO2 reduction; cu electrodeposition; dynamic hydrogen bubble templating; free-standing Cu foams; power-to-value |
| DDC Subjects: | 500 Science > 540 Chemistry 600 Technology, medicine, applied sciences > 620 Engineering |
| Institutions of the University: | Faculties > Faculty of Engineering Science > Chair Electrochemical Process Engineering > Chair Electrochemical Process Engineering - Univ.-Prof. Dr.-Ing. Christina Roth Faculties Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Electrochemical Process Engineering |
| Language: | English |
| Originates at UBT: | Yes |
| URN: | urn:nbn:de:bvb:703-epub-9087-8 |
| Date Deposited: | 07 Apr 2026 14:12 |
| Last Modified: | 07 Apr 2026 14:12 |
| URI: | https://epub.uni-bayreuth.de/id/eprint/9087 |
Download Statistics