Related Experiment Video
Updated: Apr 9, 2026
Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
Published on: June 9, 2023
Entropy-Driven Spin Transition in Rare Earth Perovskites Enables Feedback Adsorption for Enhanced Acidic Water
Yong Jiang1, Mingzi Sun2, Zhong Liang1
1Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, China.
None:
Modulating catalytic reaction pathways and site reaction behaviors to break the activity/stability trade-off poses significant challenges for the acid oxygen evolution reaction (OER). Herein, a sol-gel method is proposed to prepare high entropy rare earth (HERE) perovskite oxides HERECoO3/RuO2 (RE = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) for pH-universal OER for the first time. (LaPrNdSmEu)CoO3/RuO2 achieves a current density of 10 mA cm-2 for OER with overpotentials of only 115 mV and operates stably over 1000 h at 0.1 A cm-2 under the acidic condition. Experimental results indicate that the novel spin regulation-lattice oxygen mechanism (SR-LOM) induces a shift in the OER mechanism from the adsorption evolution mechanism (AEM) to LOM, and promotes the spin state transition of Co to optimize intermediate adsorption. Theoretical calculations have confirmed that the high entropy strategy has induced stronger interactions at the heterointerface, which not only accelerates the electron transfer but also promotes the electroactivity of the surface. Moreover, the lattice oxygen becomes more flexible in HERECO3/RuO2, enabling the LOM process to promote the superior OER with reduced energy barriers. Our findings provide a new way for the rational design of highly active RE-based electrocatalysts.
More Related Videos
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
09:49In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
Published on: May 13, 2020
Related Concept Videos
03:02Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
02:42Valence Bond Theory