High-Throughput Electrochemical Strategy for Synthesis of Iron-Based Nanostructures for Electrocatalytic Water Splitting
Full article
| Journal |
Journal of Materials Science
ISSN: 0022-2461
, E-ISSN: 1573-4803
|
| Output data |
Year: 2024,
Volume: 59,
Number: 4,
Pages: 1265–1279
Pages count
: 15
DOI:
10.1007/s10853-023-09290-w
|
| Tags |
Annealing; Electrocatalysts; Electrolytes; Electrooxidation; Free energy; Hematite; Hydrogen production; Iron; Oxygen; Sodium chloride; Sodium hydroxide |
| Authors |
Molodtsova Tatyana
1
,
Ulyankina Anna
1
,
Gorshenkov Mikhail
2
,
Kubrin Stanislav
3
,
Kaichev Vasily
4
,
Smirnova Nina
1
|
| Affiliations |
| 1 |
Platov South-Russian State Polytechnic University (NPI), Novocherkassk, Russia, 346428
|
| 2 |
National University of Science and Technology (MISIS), Moscow, Russia, 119049
|
| 3 |
Southern Federal University, Rostov-on-Don, Russia, 344006
|
| 4 |
Boreskov Institute of Catalysis, Novosibirsk, Russia, 630090
|
|
Funding (2)
|
1
|
Ministry of Science and Higher Education of the Russian Federation
|
075-03-2021-016/4 (121111000053-9) (FENN-2021-0008)
|
|
2
|
Russian Science Foundation
|
23-79-10219
|
Electrochemical water splitting has drawn significant attention for hydrogen generation as a carbon-free energy carrier for the construction of a net-zero society. To scale up water electrolyzers, enormous efforts have been made to the development of high-throughput synthesis of the electrocatalysts based on abundance and non-toxic elements for both oxygen and hydrogen evolution reactions. In this work, Fe-based nanostructures with a high Fe electrooxidation rate (up to 1 g cm−2 h−1) were prepared through a controlled and feasible electrosynthesis using pulse alternating current. The effect of electrolyte solution and post-annealing on composition/structural characteristics and electrochemical activity of the Fe-based nanostructures was depicted. The bi-phase sheet-like γ-Fe2O3/δ-FeOOH and cube-like γ-Fe2O3/α-FeOOH structures are formed in aqueous NaOH and NaCl solutions, respectively. The electrocatalytic activity of the synthesized structures was tailored by annealing up to 500 °C in air. The α-Fe2O3 catalyst synthesized in NaOH and NaCl demonstrated the overpotentials of 441 and 390 mV at 10 mA cm−2 in hydrogen and oxygen evolution reactions, respectively. This work provides new and deep insights into the high-throughput electrosynthesis of low-cost catalysts for hydrogen and oxygen production from water splitting. Therefore, this work focuses on the rational design and research of Fe-based catalysts for electrochemical water splitting.