Be Aware of Transient Dissolution Processes in Co3O4 Acidic Oxygen Evolution Reaction Electrocatalysts DOI Creative Commons
Tatiana Priamushko, Evanie Franz, Anja Logar

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Recently, cobalt-based oxides have received considerable attention as an alternative to expensive and scarce iridium for catalyzing the oxygen evolution reaction (OER) under acidic conditions. Although reported materials demonstrate promising durability, they are not entirely intact, calling fundamental research efforts understand processes governing degradation of such catalysts. To this end, work studies dissolution mechanism a model Co3O4 porous catalyst different electrochemical conditions using online inductively coupled plasma mass spectrometry (online ICP-MS), identical location scanning transmission electron microscopy (IL-STEM), differential (DEMS). Despite high thermodynamics tendency reflected in Pourbaix diagram, it is shown that cobalt kinetics sluggish can be lowered further by modifying protocol. For latter, identified study, several (electro)chemical pathways lead must considered. Hence, uncovers transient character provides valuable insights help stability already published works facilitate knowledge-driven design novel, stable, abundant catalysts toward OER environment.

Language: Английский

Cr dopant mediates hydroxyl spillover on RuO2 for high-efficiency proton exchange membrane electrolysis DOI Creative Commons

Yu Shen,

Xiaolong Zhang,

Ming‐Rong Qu

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Sept. 9, 2024

Language: Английский

Citations

23
Regulation of Oxide Pathway Mechanism for Sustainable Acidic Water Oxidation DOI
Xuejie Cao, Hongye Qin, Jinyang Zhang

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(46), P. 32049 - 32058

Published: Nov. 12, 2024

The advancement of acid-stable oxygen evolution reaction (OER) electrocatalysts is crucial for efficient hydrogen production through proton exchange membrane (PEM) water electrolysis. Unfortunately, the activity constrained by a linear scaling relationship in adsorbed mechanism, while lattice-oxygen-mediated mechanism undermines stability. Here, we propose heterogeneous dual-site oxide pathway (OPM) that avoids these limitations direct dioxygen radical coupling. A combination Lewis acid (Cr) and Ru to form solid solution oxides (Cr

Language: Английский

Citations

22
Atomic rare earths activate direct O-O coupling in manganese oxide towards electrocatalytic oxygen evolution DOI
Meng Li,

Xuan Wang,

Di Zhang

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: 128, P. 109868 - 109868

Published: June 10, 2024

Language: Английский

Citations

21
Designing neighboring-site activation of single atom via tunnel ions for boosting acidic oxygen evolution DOI Creative Commons
Yixin Hao, Sung‐Fu Hung, Luqi Wang

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Sept. 13, 2024

Realizing an efficient turnover frequency in the acidic oxygen evolution reaction by modifying configuration is crucial designing high-performance single-atom catalysts. Here, we report a "single atom-double site" concept, which involves activatable inert manganese atom redox chemistry Ru-Mn dual-site platform with tunnel Ni ions as trigger. In contrast to conventional catalysts, proposed allows direct intramolecular coupling driven intercalation effect, bypassing secondary deprotonation step instead of kinetically sluggish adsorbate mechanism. The strong bonding activates terminal groups and inhibits cross-site disproportionation process inherent Mn scaffolding, ensure platform. As result, Ru-Ni-Mn octahedral molecular sieves catalyst delivers low overpotential, adequate mass activity good stability.

Language: Английский

Citations

21
Defect Engineering of RuO2 Aerogel for Efficient Acidic Water Oxidation DOI
Xiang Han, Mengyuan Jin,

Tingting Chen

et al.

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(3), P. 748 - 755

Published: Jan. 29, 2024

The development of renewable energy conversion devices heavily relies on the design high-performance electrocatalysts for water electrolysis systems. In this study, a Se-doped RuO2 aerogel (Se-RuO2 aerogel) with abundant defects is prepared as an excellent oxygen evolution reaction (OER) electrocatalyst in acidic media. Se-RuO2 exhibits remarkably low overpotential 166 mV at current density 10 mA cm–2 and long-term stability up to 48 h. Concurrently, detailed situ experiments demonstrate that can maintain during OER process, their path follows more stable adsorption mechanism. Therefore, it operate 100 h when assembled anode catalyst polymer electrolyte membrane (PEM) electrolyzer. This work provides new vision based defect engineering.

Language: Английский

Citations

19
Breaking the Bottleneck of Activity and Stability of RuO2-Based Electrocatalysts for Acidic Oxygen Evolution DOI

Weimo Li,

Ce Wang, Xiaofeng Lu

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 13, 2024

Electrochemical acidic oxygen evolution reaction (OER) is an important part for water electrolysis utilizing a proton exchange membrane (PEM) apparatus industrial H

Language: Английский

Citations

16
Tantalum-stabilized ruthenium oxide electrocatalysts for industrial water electrolysis DOI
Jiahao Zhang, Xianbiao Fu, Soonho Kwon

et al.

Science, Journal Year: 2025, Volume and Issue: 387(6729), P. 48 - 55

Published: Jan. 2, 2025

The iridium oxide (IrO

Language: Английский

Citations

15
Effectiveness of strain and dopants on breaking the activity-stability trade-off of RuO2 acidic oxygen evolution electrocatalysts DOI Creative Commons
Yang Liu,

Yixuan Wang,

Hao Li

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Feb. 17, 2025

Ruthenium dioxide electrocatalysts for acidic oxygen evolution reaction suffer from mediocre activity and rather instability induced by high ruthenium-oxygen covalency. Here, the tensile strained strontium tantalum codoped ruthenium nanocatalysts are synthesized via a molten salt-assisted quenching strategy. The spacially elongates bond reduces covalency, thereby inhibiting lattice participation structural decomposition. synergistic electronic modulations among strontium-tantalum-ruthenium groups both optimize deprotonation on sites intermediates absorption sites, lowering energy barrier. Those result in well-balanced activity-stability profile, confirmed comprehensive experimental theoretical analyses. Our electrode demonstrates an overpotential of 166 mV at 10 mA cm−2 0.5 M H2SO4 order magnitude higher S-number, indicating comparable stability compared to bare catalyst. It exhibits negligible degradation rates within long-term operation single cell PEM electrolyzer. This study elucidates effectiveness strain strategic doping enhancing ruthenium-based catalysts reactions. poor due authors report dopants improving stability.

Language: Английский

Citations

6
Atomic-level Ru-Ir mixing in rutile-type (RuIr)O2 for efficient and durable oxygen evolution catalysis DOI Creative Commons
Yeji Park, Ho Yeon Jang, Tae Kyung Lee

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 10, 2025

Abstract The success of proton exchange membrane water electrolysis (PEMWE) depends on active and robust electrocatalysts to facilitate oxygen evolution reaction (OER). Heteroatom-doped-RuO x has emerged as a promising because heteroatoms suppress lattice participation in the OER, thereby preventing destabilization surface Ru catalyst degradation. However, identifying suitable achieving their atomic-scale coupling with atoms are nontrivial tasks. Herein, steer pathway away from involvement oxygen, we integrate OER-active Ir into RuO 2 matrix, which maximizes synergy between stable centers, by leveraging changeable growth behavior Ru/Ir parameter-modulated templates. In PEMWE, resulting (RuIr)O /C demonstrate notable current density 4.96 A cm −2 mass activity 19.84 mg Ru+Ir −1 at 2.0 V. situ spectroscopic analysis computational calculations highlight importance synergistic coexistence Ru/Ir-dual-OER-active sites for mitigating dissolution via optimization binding energy intermediates stabilization sites.

Language: Английский

Citations

5
Advances in Oxygen Evolution Reaction Electrocatalysts via Direct Oxygen–Oxygen Radical Coupling Pathway DOI Creative Commons
Chengli Rong, Xinyi Huang, Hamidreza Arandiyan

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

Abstract Oxygen evolution reaction (OER) is a cornerstone of various electrochemical energy conversion and storage systems, including water splitting, CO 2 /N reduction, reversible fuel cells, rechargeable metal‐air batteries. OER typically proceeds through three primary mechanisms: adsorbate mechanism (AEM), lattice oxygen oxidation (LOM), oxide path (OPM). Unlike AEM LOM, the OPM via direct oxygen–oxygen radical coupling that can bypass linear scaling relationships intermediates in avoid catalyst structural collapse thereby enabling enhanced catalytic activity stability. Despite its unique advantage, electrocatalysts drive remain nascent are increasingly recognized as critical. This review discusses recent advances OPM‐based electrocatalysts. It starts by analyzing mechanisms guide design Then, several types novel materials, atomic ensembles, metal oxides, perovskite molecular complexes, highlighted. Afterward, operando characterization techniques used to monitor dynamic active sites examined. The concludes discussing research directions advance toward practical applications.

Language: Английский

Citations

4