Synergistic Catalytic Effects of Yb 2 O 3 @C, Gd 2 O 3 @C, and CeO 2 @C on Mg–La–Ni Alloys’ Hydrogen Storage Properties
Source abstract
Abstract
Yb 2 O 3 @C, Gd 2 O 3 @C, and CeO 2 @C hybrid catalysts with porous, defect-rich structures were synthesized via a modified vaporization–carbonization method and incorporated (7 wt %) into Mg 96 La 3 Ni alloys by ball milling. Yb 2 O 3 @C increased hydrogen absorption, while Gd 2 O 3 @C and CeO 2 @C reduced it; all enhanced dehydrogenation, with CeO 2 @C most effective. At 360 °C, 3 wt % H 2 was released in 3.1 min for pristine Mg 96 La 3 Ni, but only 1.0, 1.9, and 2.7 min with CeO 2 @C, Yb 2 O 3 @C, and Gd 2 O 3 @C, respectively. CeO 2 @C reduced the activation energy from 121.67 to 109.78 kJ/mol. This study highlights the novelty of combining rare-earth oxides with defective carbon supports, where in situ hydrides act as “hydrogen pumps” and carbon frameworks provide nucleation sites. This synergistic strategy enhances kinetics and cycling stability without altering thermodynamics, offering new insights for Mg-based hydrogen storage alloys.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Hydrogen Storage and Materials · Magnesium Alloys: Properties and Applications · Catalysts for Methane Reforming
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Automotive Engineering
Shanxi Vocational University of Engineering Science and Technology
School of Intelligent Manufacturing
Department of Materials
Jinzhong University
Funding
Fundamental Research Program of Shanxi Province
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