Enhanced Poisoning Resistance of TiFe-Based Hydrogen Storage Alloys via CeO 2 Nanocoating in Impure Hydrogen Atmospheres
Source abstract
Abstract
Hydrogen, which is a clean energy carrier, requires efficient storage for large-scale application. Although TiFe-based hydrogen storage alloys possess outstanding storage capabilities, they are susceptible to impurity gas poisoning (CO, CO 2, CH 4, O 2 ) during practical use, leading to performance decay. In this work, a TiFe 0.9 alloy coated with 10 wt % CeO 2 was synthesized via high-energy ball milling. Through material characterizations and systematic hydrogen storage performance tests, it was revealed that the uniform CeO 2 nanolayer coating introduces a substantial amount of oxygen vacancies derived from Ce 3+ . These vacancies serve as preferential reaction sites for impurity gases as well as form oxides at the interface, effectively inhibiting further Ti oxidation and preserving active hydrogen adsorption sites. Remarkably, in hydrogen containing 0.1% O 2, the TiFe 0.9 -CeO 2 composite material exhibits a capacity retention rate of 27%, compared to the ball-milled alloy which suffered a complete loss after 20 cycles. This work presents a low-cost and simple approach for developing durable TiFe-based hydrogen storage materials with an enhanced tolerance to impurity-induced poisoning, supporting their practical application in hydrogen energy systems.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Hydrogen Storage and Materials · Electrocatalysts for Energy Conversion · Catalytic Processes in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Science and Technology for New Energy
Xi’an Technological University
Department of Materials Science
Fudan University
Funding
National Key Research and Development Program of China · National Natural Science Foundation of China · Key Research and Development Projects of Shaanxi Province · Xi?an City
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