Boosting H 2 Evolution from Thermal NH 3 Decomposition by the Catalyst of Ru Quantum Dots on Mesoporous MgO Dendrite Networks
| Title: | Boosting H 2 Evolution from Thermal NH 3 Decomposition by the Catalyst of Ru Quantum Dots on Mesoporous MgO Dendrite Networks |
|---|---|
| Authors: | Tsai-En Ho; Yu-Chung Chang; Pei-En Wang; Shih-Yu Yuan; Lian-Ming Lyu; Cheng-Shiuan Li; Jeng-Lung Chen; Chun-Hong Kuo |
| Publication Year: | 2025 |
| Collection: | The University of Auckland: Figshare |
| Subject Terms: | Biophysics; Biochemistry; Cell Biology; Evolutionary Biology; Developmental Biology; Inorganic Chemistry; Environmental Sciences not elsewhere classified; Biological Sciences not elsewhere classified; Chemical Sciences not elsewhere classified; Physical Sciences not elsewhere classified; high hydrogen content; attracted significant interest; 450 ° c; 08 wt %; specific ru loading; ru quantum dots; ru electronic structures; situ synchrotron x; ray absorption spectroscopy; mgo catalysts exhibited; 3 |
| Description: | Thermocatalytic NH 3 decomposition in an oxygen-free environment has attracted significant interest as NH 3 boasts a high hydrogen content of 17.8% and can be liquefied under mild conditions at 0.8 MPa and 298 K for convenient H 2 storage and transportation. In particular, it leads to clean products of N 2 and H 2 without carbon and NO x emissions. However, the current challenges in NH 3 decomposition are the effective temperature, overall cost, and durability of applicable catalysts. Through an impregnation strategy, we demonstrate the fabrication of robust Ru quantum dots (QDs) on mesoporous MgO dendritic networks (Ru QD/p-MgO). With a specific Ru loading of 1.08 wt%, the Ru QD/p-MgO catalysts exhibited a TOF(H 2 ) value of 4.35 s –1 from NH 3 decomposition at 450 °C and over 6.20 s –1 when it exceeding 550 °C. Meanwhile, the NH 3 conversion reached a higher value of 98% at temperatures ≥550 °C. It was proved to be a robust catalyst for 7 reuse cycles without losing the QD monodispersity. Finally, in situ synchrotron X-ray absorption spectroscopy (SXAS) and infrared (IR) spectroscopy were also performed to examine the evolutions in Ru electronic structures and surface adsorption at all the reaction stages. |
| Document Type: | article in journal/newspaper |
| Language: | unknown |
| Relation: | https://figshare.com/articles/journal_contribution/Boosting_H_sub_2_sub_Evolution_from_Thermal_NH_sub_3_sub_Decomposition_by_the_Catalyst_of_Ru_Quantum_Dots_on_Mesoporous_MgO_Dendrite_Networks/29467723 |
| DOI: | 10.1021/acssuschemeng.5c03115.s001 |
| Availability: | https://doi.org/10.1021/acssuschemeng.5c03115.s001; https://figshare.com/articles/journal_contribution/Boosting_H_sub_2_sub_Evolution_from_Thermal_NH_sub_3_sub_Decomposition_by_the_Catalyst_of_Ru_Quantum_Dots_on_Mesoporous_MgO_Dendrite_Networks/29467723 |
| Rights: | CC BY-NC 4.0 |
| Accession Number: | edsbas.8765985B |
| Database: | BASE |