Light-Enabled Reversible Hydrogen Storage of Borohydrides Activated by Photogenerated Vacancies

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

Published: Jan. 10, 2025

Borohydrides, known for ultrahigh hydrogen density, are promising storage materials but typically require high operating temperatures due to their strong thermodynamic stability. Here we introduce a novel light-induced destabilization mechanism reaction of borohydrides under ambient conditions via photogenerated vacancies in LiH. These thermodynamically destabilize B–H bonds through the spontaneous "strong adsorption" BH4 groups, which trigger an asymmetric redistribution electrons, enabling release at near room temperature, approximately 300 °C lower than corresponding thermal process. By utilizing specially designed "nano-photothermal reactors", optimize effect with nanoscale dispersed LiH and create space-confined "hotspots" enhance kinetics, achieve capacity 11.02 wt % H2 LiBH4 using only light irradiation. This can also be extended other alkali metal borohydrides, offering insights developing solid-state mild conditions.

Language: Английский

---

Bimetallic Ti2NbC2 MXene as an efficient catalyst for reversible hydrogen storage in magnesium hydride

Rare Metals, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Language: Английский

---

In Situ Construction of Interface with Photothermal and Mutual Catalytic Effect for Efficient Solar‐Driven Reversible Hydrogen Storage of MgH₂

Advanced Science, Journal Year: 2024, Volume and Issue: 11(22)

Published: March 22, 2024

Abstract Hydrogen storage in MgH 2 is an ideal solution for realizing the safe of hydrogen. High operating temperature, however, required hydrogen induced by high thermodynamic stability and kinetic barrier. Herein, flower‐like microspheres uniformly constructed N‐doped TiO nanosheets coated with TiN nanoparticles are fabricated to integrate light absorber thermo‐chemical catalysts at a nanometer scale driving using solar energy. situ transformed into x O y Ti/TiH distributed inside matrix during cycling, which pairs serve as absorbers that exhibit strong localized surface plasmon resonance effect full‐spectrum absorbance capability. On other hand, it theoretically experimentally demonstrated intimate interface between TiH can not only thermodynamically kinetically promote H desorption from but also simultaneously weaken Ti─H bonds hence turn improve combination weakened bonds. The uniform integration photothermal catalytic leads direct action heat generated on initiating capacity 6.1 wt.% under 27 sun.

Language: Английский

---

High-efficiency hydrogen storage of magnesium hydride achieved by catalytic doping with zirconium titanate

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 114, P. 115907 - 115907

Published: Feb. 20, 2025

Language: Английский

---

Effect of Ti-EG-Ni Dual-Metal Organic Crystal-Derived TiO₂/C/Ni on the Hydrogen Storage Performance of MgH₂

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

To effectively address the kinetic sluggishness associated with MgH2, this study utilized Ti-EG-Ni dual-metal organic crystal as precursors and employed carburization to prepare unique rod-shaped structure TiO2/C/Ni. The catalyst was incorporated into MgH2 by ball milling, demonstrating excellent hydrogen storage performance. composite of MgH2-8 wt % TiO2/C/Ni exhibited a lower initial dehydrogenation temperature 185 °C marked activation energy 60.537 kJ/mol. At 300 150 °C, it only required s release 6.17 H2 absorb 5.72 within 20 s, respectively. Additionally, composites demonstrated cycling stability, maintaining 94% reversible capacity after 50 cycles. Theoretical computations suggested that in situ-generated metal Mg2Ni semiconductor TiO2 created Schottky heterojunction, which stimulated an internal electric field between Ni TiO2, accelerating electron transfer. strong electronic interaction weakened Mg-H bond elongated bond, promoting dissociation. During absorption desorption, material performance due uniform distribution elements, catalytic active sites (multivalent Ti Mg2Ni/Mg2NiH4), support provided carbon nanostructures. Our findings provide deeper understanding how highly catalysts oxides/C/Ni enhance MgH2.

Language: Английский

---

Enhancing hydrogen storage properties of MgH2 via reaction-induced construction of Ti/Co/Mn-based multiphase catalytic system

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: unknown, P. 129776 - 129776

Published: Sept. 1, 2024

Language: Английский

---

Preparation strategy of photo-thermal composite phase change materials: A review

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 102, P. 114155 - 114155

Published: Oct. 19, 2024

Language: Английский

---

MXene Ti3C2@NiO catalysts for improving the kinetic performance of MgH2 hydrogen storage

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: unknown, P. 177963 - 177963

Published: Dec. 1, 2024

Language: Английский

---

Prediction of comprehensive properties and their hydrogen performance of Mg2XH6(X=Mn, Fe, Co, Ni) perovskite hydrides based on first principles

Ceramics International, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 1, 2024

Language: Английский

---

Effect of NiFe-LDH/FeO(OH) derivatives on the hydrogen storage properties of MgH2

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 121, P. 326 - 336

Published: April 1, 2025

Language: Английский

---