Rare earth single atoms enhance manganese oxide's electrochemical oxygen evolution
The date of：
2024-12-31
viewed:
0
An international group of researchers has developed a novel approach that enhances the efficiency of the oxygen evolution reaction (OER), a key process in renewable energy technologies. By introducing rare earth single atoms into manganese oxide (MnO2), the group successfully modulated oxygen electronic states, leading to unprecedented improvements in OER performance.Their findings are published in the journal Nano Energy.Transition-metal-based oxides have been widely explored for their potential as active OER catalysts. However, the capacity of these catalysts is hindered by the adsorbate evolution mechanism, which limits the effective release of oxygen (O2) during the reaction."We constructed localized asymmetric gadolinium-oxygen-manganese units on MnO2, which helps accumulate electrons at oxygen sites," notes Hao Li, corresponding author of the paper and an associate professor at the Advanced Institute for Materials Research (WPI-AIMR) at Tohoku University."By doing this, the catalysts achieve a lower overpotential and maintain stability over time, making it a suitable alternative to traditional catalysts such as ruthenium dioxide (RuO2)."Hao Li and his colleagues employed an argon plasma-assisted strategy to introduce rare earth elements on the catalyst surface. In this strategy, argon gas is ionized, energizing and helping break the argon atoms into ions and electrons, thereby making it easier to interact with and modify materials."We have addressed the challenges associated with the adsorbate evolution mechanism that limits the performance of transition-metal-based oxides like MnO2," adds Di Zhang, co-author of the study and a Specially Appointed Assistant Professor at WPI-AIMR."By improving the understanding of the structure-activity relationship under the lattice oxygen mechanism, the research provides a foundation for more effective catalyst design."Building on the success of this study, the group plans to extend their methodology to a variety of electrochemical reactions. This approach will help further decipher unique structure-activity correlations, ultimately contributing to the design of even more effective and high-performance electrocatalysts.More information: Meng Li et al, Atomic rare earths activate direct O
Hot News
/
Related to recommend
2025
-
06
-
06
Click on the number of times:
1
来源：ACS PublicationsWe report the activity of transition metals (Fe, Co, and Ru) supported on CeO2 (CeO) and Gd-doped CeO2 (CeGdO) for ammonia synthesis. Compared with BM/CeO (BM = Fe + Co), the Ru/BM/...
2025
-
06
-
05
Click on the number of times:
0
Structural Transformations in Nickel-Doped Lanthanum-Based Electrocatalyst for Enhanced Oxygen Evolution Reaction 来源：ACS PublicationsMetal oxides are among the most promising electrocatalysts for...
2025
-
06
-
04
Click on the number of times:
0
Optimized Flux Single-Crystal Growth of the Quantum Spin Liquid Candidate NdTa7O19 and Other Rare-Earth Heptatantalates, ErTa7O19 and GdTa7O19 来源：ACS PublicationsSingle crystals are essential for...
2025
-
06
-
03
Click on the number of times:
0
Crystal Growth of Quaternary Rare Earth Selenosilicates by Using the Flux-Assisted Boron Chalcogen Mixture Method: Investigation of Their Magnetic and Optical Properties来源：ACS PublicationsA series of ...