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URN to cite this document: urn:nbn:de:bvb:703-epub-9069-2
Title data
Lobo, Carlos M. S. ; Ferreira Gomes Lobo, Bruna ; Xia, Lu ; Jiang, Wulyu ; Chen, Tengyu ; Zhao, Kaiqi ; Vernasqui, Laís G. ; Kammal, Hannah ; Liesz, Eric ; Prietz, Jonas ; García de Arquer, F. Pelayo ; Roth, Christina:
Facile Tri-Metallic Catalyst Fabrication Using the Dynamic Hydrogen Bubble Template method.
In: Advanced Functional Materials.
Vol. 36
(2026)
Issue 1
.
- e09522.
ISSN 1616-3028
DOI der Verlagsversion: https://doi.org/10.1002/adfm.202509522
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Project information
| Project title: |
Project's official title Project's id SPP 2370: Verknüpfung von Katalysatoren, Mechanismen und Reaktorkonzepten für die Umwandlung von Distickstoff durch elektrokatalytische, photokatalytische und photoelektrochemische Methoden ("Nitroconversion") 460921994 Live-XAS 05K22WC1 HighHy - Development of highly active anodes for anion exchange membrane electrolysers to enable low-cost green hydrogen 03SF0689B Open Access Publizieren No information |
|---|---|
| Project financing: |
Deutsche Forschungsgemeinschaft Bundesministerium für Bildung und Forschung São Paulo Research Foundation (grant numbers #2024/06899-0, #2023/06233-9) |
Abstract
Electrocatalysts play a fundamental role in enabling and enhancing the efficiency of a variety of energy-transition-relevant reactions (e.g. water electrolysis, fuel cells, and CO2 conversion to value-added products). Multi-elemental electrocatalysts are particularly attractive because they often outperform their mono- or bi-metallic counterparts. However, the design and fabrication of such catalysts with high surface area remains challenging due to limitations in synthetic control and compositional complexity. Here, the Dynamic Hydrogen Bubble Template (DHBT) method is used—a facile approach to fabricate freestanding, binder-free metallic foams with hierarchical porosity—to synthesize Ni-based mono-, bi-, and tri-metallic electrocatalysts. The materials are subsequently annealed and evaluated for two model reactions: oxygen evolution and glucose oxidation. Annealing enhances both crystallinity and electrochemically active surface area (ECSA), likely due to Mn surface segregation and nanocrystallization at grain boundaries. Among the compositions, NiMn exhibits the highest post-anneali mass-normalized ECSA (36 m2 $\rm g_\mathrmcat⁻¹$), although this does not translate into improved catalytic activity. In contrast, NiMn and NiMnFe achieve the highest mass-specific activities, followed by NiFeMo. Anion Exchange Membrane Water Electrolysis tests (AEMWE) showed that NiMnFe achieved over 3.4 A cm−2 at 2.0 V in alkaline conditions. This study demonstrates that DHBT is a viable and versatile method for fabricating multimetallic electrocatalysts with tunable porosity and composition, enabling the controlled synthesis of porous multi-metallic structures and offering a promising route toward high-entropy alloy formation through electrolyte composition tuning and annealing procedures.
Further data
| Item Type: | Article in a journal |
|---|---|
| Keywords: | AEMWE; DHBT; electrocatalyst fabrication; glucose oxidation; OER; tri-metallic electrocatalysts |
| 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-9069-2 |
| Date Deposited: | 02 Apr 2026 11:48 |
| Last Modified: | 02 Apr 2026 11:49 |
| URI: | https://epub.uni-bayreuth.de/id/eprint/9069 |
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