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Xing X, Zhang X, Wei M, Zhang Z, Cao B, Liu T. Nanoencapsulated MgBu 2@ZIF-67 to Construct High Loading Mg-Co@C Nanocomposites: Breaking Through the Barrier of Room Temperature Onset Dehydrogenation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2402982. [PMID: 39011738 DOI: 10.1002/smll.202402982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 06/24/2024] [Indexed: 07/17/2024]
Abstract
The synergies of nanoconfinement and catalysis is an effective strategy to improve the kinetic and thermodynamic properties of Mg-based materials. However, obtaining Mg-based materials with high loading, anti-aggregation, and containing nanocatalysts to achieve dehydrogenation at room temperature remains a huge challenge. Herein, a novel and universal preparation strategy for Mg-Co@C nanocomposites with 9.5 nm Mg nanoparticles and 9.4 nm Co nanocatalysts embedded in carbon scaffold is reported. The 9.3 nm MgBu2 nanosheets precipitated by solvent displacement are encapsulated in ZIF-67 to prepare MgBu2@ZIF-67 precursors, then removing excess MgBu2 on the precursor surface and pyrolysis to obtain Mg-Co@C. It is worth noting that the Mg loading rate of Mg-Co@C is as high as rare 69.7%. Excitingly, the Mg-Co@C begins to dehydrogenate at room temperature with saturate capacity of 5.1 wt.%. Meanwhile, its dehydrogenation activation energy (Ea(des) = 68.8 kJ mol-1) and enthalpy (ΔH(des) = 61.6 kJ mol-1) significantly decrease compared to bulk Mg. First principles calculations indicate that the hydrogen adsorption energy on the Mg2CoH5 surface is only -0.681 eV. This work provides a universally applicable novel method for the preparation of nanoscale Mg-based materials with various nanocatalysts added, and provides new ideas for Mg-based materials to achieve room temperature hydrogen storage.
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Affiliation(s)
- Xiaofei Xing
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, No.37 Xueyuan Road, Beijing, 100191, P. R. China
| | - Xinjia Zhang
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, No.37 Xueyuan Road, Beijing, 100191, P. R. China
| | - Mingxing Wei
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, No.37 Xueyuan Road, Beijing, 100191, P. R. China
| | - Zhao Zhang
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, No.37 Xueyuan Road, Beijing, 100191, P. R. China
| | - BoYuan Cao
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, No.37 Xueyuan Road, Beijing, 100191, P. R. China
| | - Tong Liu
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, No.37 Xueyuan Road, Beijing, 100191, P. R. China
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2
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Xiao Y, Li H, Yao B, Xiao K, Wang Y. Hollow g-C 3N 4@Ag 3PO 4 Core-Shell Nanoreactor Loaded with Au Nanoparticles: Boosting Photothermal Catalysis in Confined Space. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308032. [PMID: 38801010 DOI: 10.1002/smll.202308032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/31/2023] [Indexed: 05/29/2024]
Abstract
Low solar energy utilization efficiency and serious charge recombination remain major challenges for photocatalytic systems. Herein, a hollow core-shell Au/g-C3N4@Ag3PO4 photothermal nanoreactor is successfully prepared by a two-step deposition method. Benefit from efficient spectral utilization and fast charge separation induced by the unique hollow core-shell heterostructure, the H2 evolution rate of Au/g-C3N4@Ag3PO4 is 16.9 times that of the pristine g-C3N4, and the degradation efficiency of tetracycline is increased by 88.1%. The enhanced catalytic performance can be attributed to the ordered charge movement on the hollow core-shell structure and a local high-temperature environment, which effectively accelerates the carrier separation and chemical reaction kinetics. This work highlights the important role of the space confinement effect in photothermal catalysis and provides a promising strategy for the development of the next generation of highly efficient photothermal catalysts.
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Affiliation(s)
- Yawei Xiao
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 6500504, P. R. China
| | - Haoyu Li
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 6500504, P. R. China
| | - Bo Yao
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 6500504, P. R. China
| | - Kai Xiao
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, P. R. China
| | - Yude Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 6500504, P. R. China
- Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies, Yunnan University, Kunming, 650504, P. R. China
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3
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Cheng Z, Guan Y, Wen H, Li Z, Cui K, Pei Q, Wang S, Pistidda C, Guo J, Cao H, Chen P. Light-Driven De/Rehydrogenation of a LiH Surface under Ambient Conditions. J Phys Chem Lett 2024; 15:6662-6667. [PMID: 38889366 DOI: 10.1021/acs.jpclett.4c00874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Lithium hydride (LiH), a saline hydride with a hydrogen density of 12.6 wt %, is highly thermostable, which hinders its extensive application in hydrogen storage. In this study, we demonstrate a distinct photodecomposition of LiH under ambient conditions. Ultraviolet-visible (UV-vis) illumination induces hydrogen release and creates surface hydrogen vacancies on LiH. The subsequent H- migration enables hydrogen desorption and the accumulation of vacancies at the subsurface, resulting in the generation of metallic Li clusters. Rehydrogenation, on the contrary, can be charged under UV-vis illumination in 1 bar H2. Such phenomena show that the thermodynamic and kinetic limits in the re/dehydrogenation of LiH can be broken under illumination, which allows hydrogen storage over the LiH surface at temperatures ∼600 K lower than those of the corresponding thermal process. This work provides new insights into the interaction of semiconducting hydrides and photons and opens an avenue for the development and optimization of materials for hydrogen storage and related photodriven reactions.
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Affiliation(s)
- Zibo Cheng
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yeqin Guan
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Hong Wen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Zhao Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Kaixun Cui
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Qijun Pei
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Shangshang Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | | | - Jianping Guo
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Hujun Cao
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ping Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- State Key Laboratory of Catalysis, Dalian 116023, China
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4
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Ur Rehman A, Akram Khan S, Mansha M, Iqbal S, Khan M, Mustansar Abbas S, Ali S. MXenes and MXene-Based Metal Hydrides for Solid-State Hydrogen Storage: A Review. Chem Asian J 2024:e202400308. [PMID: 38880773 DOI: 10.1002/asia.202400308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 06/15/2024] [Accepted: 06/16/2024] [Indexed: 06/18/2024]
Abstract
Hydrogen-driven energy is fascinating among the everlasting energy sources, particularly for stationary and onboard transportation applications. Efficient hydrogen storage presents a key challenge to accomplishing the sustainability goals of hydrogen economy. In this regard, solid-state hydrogen storage in nanomaterials, either physically or chemically adsorbed, has been considered a safe path to establishing sustainability goals. Though metal hydrides have been extensively explored, they fail to comply with the set targets for practical utilization. Recently, MXenes, both in bare form and hybrid state with metal hydrides, have proven their flair in ascertaining the hydrides' theoretical and experimental hydrogen storage capabilities far beyond the fancy materials and current state-of-the-art technologies. This review encompasses the significant accomplishments achieved by MXenes (primarily in 2019-2024) for enhancing the hydrogen storage performance of various metal hydride materials such as MgH2, AlH3, Mg(BH4)2, LiBH4, alanates, and composite hydrides. It also discusses the bottlenecks of metal hydrides for hydrogen storage, the potential use of MXenes hybrids, and their challenges, such as reversibility, H2 losses, slow kinetics, and thermodynamic barriers. Finally, it concludes with a detailed roadmap and recommendations for mechanistic-driven future studies propelling toward a breakthrough in solid material-driven hydrogen storage using cost-effective, efficient, and long-lasting solutions.
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Affiliation(s)
- Ata Ur Rehman
- Interdisciplinary Research Center for Hydrogen Technologies and Carbon Management, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Safyan Akram Khan
- Interdisciplinary Research Center for Hydrogen Technologies and Carbon Management, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Muhammad Mansha
- Interdisciplinary Research Center for Hydrogen Technologies and Carbon Management, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Shahid Iqbal
- Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute, University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Majad Khan
- Department of Chemistry, King Fahd University of Petroleum and Minerals, 31261, Dhahran, Saudi Arabia
| | - Syed Mustansar Abbas
- Nanoscience and Technology Department, National Center for Physics, Islamabad, 45320, Pakistan
| | - Shahid Ali
- Interdisciplinary Research Center for Hydrogen Technologies and Carbon Management, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
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5
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Hu X, Chen X, Zhang X, Meng Y, Xia G, Yu X, Sun D, Fang F. In Situ Construction of Interface with Photothermal and Mutual Catalytic Effect for Efficient Solar-Driven Reversible Hydrogen Storage of MgH 2. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2400274. [PMID: 38520071 PMCID: PMC11165547 DOI: 10.1002/advs.202400274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/26/2024] [Indexed: 03/25/2024]
Abstract
Hydrogen storage in MgH2 is an ideal solution for realizing the safe storage of hydrogen. High operating temperature, however, is required for hydrogen storage of MgH2 induced by high thermodynamic stability and kinetic barrier. Herein, flower-like microspheres uniformly constructed by N-doped TiO2 nanosheets coated with TiN nanoparticles are fabricated to integrate the light absorber and thermo-chemical catalysts at a nanometer scale for driving hydrogen storage of MgH2 using solar energy. N-doped TiO2 is in situ transformed into TiNxOy and Ti/TiH2 uniformly distributed inside of TiN matrix during cycling, in which TiN and Ti/TiHx pairs serve as light absorbers that exhibit strong localized surface plasmon resonance effect with full-spectrum light absorbance capability. On the other hand, it is theoretically and experimentally demonstrated that the intimate interface between TiH2 and MgH2 can not only thermodynamically and kinetically promote H2 desorption from MgH2 but also simultaneously weaken Ti─H bonds and hence in turn improve H2 desorption from the combination of weakened Ti─H and Ti─H bonds. The uniform integration of photothermal and catalytic effect leads to the direct action of localized heat generated from TiN on initiating the catalytic effect in realizing hydrogen storage of MgH2 with a capacity of 6.1 wt.% under 27 sun.
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Affiliation(s)
- Xuechun Hu
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
| | - Xiaowei Chen
- Department of PhysicsJimei UniversityXiamen361021P. R. China
| | - Xiaoyue Zhang
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
| | - Yang Meng
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
| | - Guanglin Xia
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
| | - Xuebin Yu
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
| | - Dalin Sun
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
| | - Fang Fang
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
- Yiwu Research Institute of Fudan UniversityYiwuZhejiang322000P. R. China
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6
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Liu S, Zhang Y, Zhu F, Liu J, Wan X, Liu R, Liu X, Shang J, Yu R, Feng Q, Wang Z, Shui J. Mg-MOF-74 Derived Defective Framework for Hydrogen Storage at Above-Ambient Temperature Assisted by Pt Catalyst. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2401868. [PMID: 38460160 PMCID: PMC11095220 DOI: 10.1002/advs.202401868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Indexed: 03/11/2024]
Abstract
Metal-organic frameworks (MOFs) are promising candidates for room-temperature hydrogen storage materials after modification, thanks to their ability to chemisorb hydrogen. However, the hydrogen adsorption strength of these modified MOFs remains insufficient to meet the capacity and safety requirements of hydrogen storage systems. To address this challenge, a highly defective framework material known as de-MgMOF is prepared by gently annealing Mg-MOF-74. This material retains some of the crystal properties of the original Mg-MOF-74 and exhibits exceptional hydrogen storage capacity at above-ambient temperatures. The MgO5 knots around linker vacancies in de-MgMOF can adsorb a significant amount of dissociated and nondissociated hydrogen, with adsorption enthalpies ranging from -22.7 to -43.6 kJ mol-1, indicating a strong chemisorption interaction. By leveraging a spillover catalyst of Pt, the material achieves a reversible hydrogen storage capacity of 2.55 wt.% at 160 °C and 81 bar. Additionally, this material offers rapid hydrogen uptake/release, stable cycling, and convenient storage capabilities. A comprehensive techno-economic analysis demonstrates that this material outperforms many other hydrogen storage materials at the system level for on-board applications.
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Affiliation(s)
- Shiyuan Liu
- Tianmushan LaboratoryHangzhou310023China
- School of Materials Science and EngineeringBeihang UniversityBeijing100191China
- Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic UniversityHong KongHong Kong SAR999077China
| | - Yue Zhang
- School of Reliability and Systems EngineeringBeihang UniversityBeijing100191China
| | - Fangzhou Zhu
- School of Materials Science and EngineeringBeihang UniversityBeijing100191China
| | - Jieyuan Liu
- School of Materials Science and EngineeringBeihang UniversityBeijing100191China
| | - Xin Wan
- School of Materials Science and EngineeringBeihang UniversityBeijing100191China
| | - Ruonan Liu
- School of Materials Science and EngineeringBeihang UniversityBeijing100191China
| | - Xiaofang Liu
- School of Materials Science and EngineeringBeihang UniversityBeijing100191China
| | - Jia‐Xiang Shang
- School of Materials Science and EngineeringBeihang UniversityBeijing100191China
| | - Ronghai Yu
- School of Materials Science and EngineeringBeihang UniversityBeijing100191China
| | - Qiang Feng
- School of Reliability and Systems EngineeringBeihang UniversityBeijing100191China
| | - Zili Wang
- School of Reliability and Systems EngineeringBeihang UniversityBeijing100191China
| | - Jianglan Shui
- Tianmushan LaboratoryHangzhou310023China
- School of Materials Science and EngineeringBeihang UniversityBeijing100191China
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7
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Zhang L, An X, Feng K, Li J, Liu J, Chen J, Li C, Zhang X, He L. Non-Photochemical Origin of Selectivity Difference between Light and Dark Catalytic Conditions. ACS APPLIED MATERIALS & INTERFACES 2024; 16:21987-21996. [PMID: 38636167 DOI: 10.1021/acsami.4c02425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
The interest in introducing light into heterogeneous catalysis is driven not only by the urgent need of replacing fossil energy but also by the promise of controlling product selectivity by light. The product selectivity differences observed in recent studies between light and dark reactions are often attributed to photochemical effects. Here, we report the discovery of a non-photochemical origin of selectivity difference, at essentially the same CO2 conversion rate, between photothermal and thermal CO2 hydrogenation reactions over a Ru/TiO2-x catalyst. While the presence of the photochemical effect from ultraviolet light is confirmed, it merely enhances the catalytic activity. Systematic investigation reveals that the gradual formation of an adsorbate-mediated strong metal-support interaction under catalytic conditions is responsible for the variation in the catalytic selectivity. We demonstrate that differences in product selectivity under light/dark reactions do not necessarily originate from photochemical effects. Our study refines the basis for determining photochemical effects and highlights the importance of excluding non-photochemical effects in mechanistic studies of light-controlled product selectivity.
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Affiliation(s)
- Lin Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Xingda An
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Kai Feng
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Juan Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Jingjing Liu
- Institute of Information Technology, Suzhou Institute of Trade and Commerce, Suzhou 215009, Jiangsu, P. R. China
| | - Jinxing Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Chaoran Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Xiaohong Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Le He
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, Jiangsu, P. R. China
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8
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Zhang X, Ju S, Li C, Hao J, Sun Y, Hu X, Chen W, Chen J, He L, Xia G, Fang F, Sun D, Yu X. Atomic reconstruction for realizing stable solar-driven reversible hydrogen storage of magnesium hydride. Nat Commun 2024; 15:2815. [PMID: 38561357 PMCID: PMC10984991 DOI: 10.1038/s41467-024-47077-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 03/14/2024] [Indexed: 04/04/2024] Open
Abstract
Reversible solid-state hydrogen storage of magnesium hydride, traditionally driven by external heating, is constrained by massive energy input and low systematic energy density. Herein, a single phase of Mg2Ni(Cu) alloy is designed via atomic reconstruction to achieve the ideal integration of photothermal and catalytic effects for stable solar-driven hydrogen storage of MgH2. With the intra/inter-band transitions of Mg2Ni(Cu) and its hydrogenated state, over 85% absorption in the entire spectrum is achieved, resulting in the temperature up to 261.8 °C under 2.6 W cm-2. Moreover, the hydrogen storage reaction of Mg2Ni(Cu) is thermodynamically and kinetically favored, and the imbalanced distribution of the light-induced hot electrons within CuNi and Mg2Ni(Cu) facilitates the weakening of Mg-H bonds of MgH2, enhancing the "hydrogen pump" effect of Mg2Ni(Cu)/Mg2Ni(Cu)H4. The reversible generation of Mg2Ni(Cu) upon repeated dehydrogenation process enables the continuous integration of photothermal and catalytic roles stably, ensuring the direct action of localized heat on the catalytic sites without any heat loss, thereby achieving a 6.1 wt.% H2 reversible capacity with 95% retention under 3.5 W cm-2.
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Affiliation(s)
- Xiaoyue Zhang
- Department of Materials Science, Fudan University, Shanghai, China
| | - Shunlong Ju
- Department of Materials Science, Fudan University, Shanghai, China
| | - Chaoqun Li
- Department of Materials Science, Fudan University, Shanghai, China
| | - Jiazheng Hao
- Spallation Neutron Source Science Center, Dongguan, China
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
| | - Yahui Sun
- Department of Materials Science, Fudan University, Shanghai, China
| | - Xuechun Hu
- Department of Materials Science, Fudan University, Shanghai, China
| | - Wei Chen
- Department of Materials Science, Fudan University, Shanghai, China
| | - Jie Chen
- Spallation Neutron Source Science Center, Dongguan, China
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
| | - Lunhua He
- Spallation Neutron Source Science Center, Dongguan, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, PR China
- Songshan Lake Materials Laboratory, Dongguan, PR China
| | - Guanglin Xia
- Department of Materials Science, Fudan University, Shanghai, China.
| | - Fang Fang
- Department of Materials Science, Fudan University, Shanghai, China.
| | - Dalin Sun
- Department of Materials Science, Fudan University, Shanghai, China
| | - Xuebin Yu
- Department of Materials Science, Fudan University, Shanghai, China.
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9
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Guan Y, Wen H, Cui K, Wang Q, Gao W, Cai Y, Cheng Z, Pei Q, Li Z, Cao H, He T, Guo J, Chen P. Light-driven ammonia synthesis under mild conditions using lithium hydride. Nat Chem 2024; 16:373-379. [PMID: 38228852 DOI: 10.1038/s41557-023-01395-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 11/13/2023] [Indexed: 01/18/2024]
Abstract
Photon-driven chemical processes are usually mediated by oxides, nitrides and sulfides whose photo-conversion efficiency is limited by charge carrier recombination. Here we show that lithium hydride undergoes photolysis upon ultraviolet illumination to yield long-lived photon-generated electrons residing in hydrogen vacancies, known as F centres. We demonstrate that photon-driven dehydrogenation and dark rehydrogenation over lithium hydride can be fulfilled reversibly at room temperature, which is about 600 K lower than the corresponding thermal process. As light-driven F centre generation could provide an alternative approach to charge carrier separation to favour chemical transformations that are kinetically or thermodynamically challenging, we show that light-activated lithium hydride cleaves the N≡N triple bond to form a N-H bond under mild conditions. Co-feeding a N2/H2 mixture with low H2 partial pressure leads to photocatalytic ammonia formation at near ambient conditions. This work provides insights into the development of advanced materials and processes for light harvesting and conversion.
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Affiliation(s)
- Yeqin Guan
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Hong Wen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Kaixun Cui
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Qianru Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Wenbo Gao
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Yongli Cai
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Zibo Cheng
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Qijun Pei
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Zhao Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Hujun Cao
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Teng He
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Jianping Guo
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China.
| | - Ping Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
- Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China.
- State Key Laboratory of Catalysis, Dalian, China.
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10
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Xu Z, Chen Y, Wang B, Ran Y, Zhong J, Li M. Highly selective photocatalytic CO 2 reduction and hydrogen evolution facilitated by oxidation induced nitrogen vacancies on g-C 3N 4. J Colloid Interface Sci 2023; 651:645-658. [PMID: 37562306 DOI: 10.1016/j.jcis.2023.08.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 07/29/2023] [Accepted: 08/02/2023] [Indexed: 08/12/2023]
Abstract
The introduction of nitrogen vacancies into polymeric carbon nitride (PCN) has been attested to be a reliable strategy to enhance photocatalytic performance. Nitrogen vacancies were considered as active sites to promote the adsorption of target molecules and capture photoexcited electrons to inhibit the recombination of charge pairs, accelerate photoinduced electrons to participate in photocatalytic reaction. In this paper, a series of PCN with rich nitrogen vacancies were prepared by etching of chromic acid solution. Sample 20KCSCN had the highest photocatalytic performance whose evolution efficiency of CO2 to CO and CH4 can reach 3.9 and 0.5 μmol·g-1·h-1, respectively. These evolution efficiencies are 2.9 and 4 times higher than that of the PCN. Meanwhile, 20KCSCN demonstrates high CO conversion selectivity and stability. The successful introduction of nitrogen vacancies not only increases the active sites of PCN surface, but also optimizes the optical structure, which dramatically boosts the separation of photoexcited charge pairs and the reduction capacity of photogenerated electrons. The enhancement mechanism for photocatalytic CO2 reduction performance of PCN was proposed. Besides, photocatalytic H2 evolution experiments were performed on all samples to confirm the universality of PCN photocatalytic activity enhancement etched by chromic acid solution. H2 evolution rate on 20KCSCN can reach 652 μmol·g-1·h-1, which is 1.6-fold higher than that on PCN (254 μmol·g-1·h-1) after 4 h irradiation under a 300 W Xe lamp. This work offers new venue for introducing nitrogen vacancies in PCN to regulate photoexcited charge pairs transfer. The photocatalytic enhancement of CO2 reduction could be used to alleviate the serious issue of excessive CO2 emission and energy crisis.
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Affiliation(s)
- Zhengdong Xu
- College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China
| | - Yang Chen
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China
| | - Binghao Wang
- College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China
| | - Yu Ran
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China
| | - Junbo Zhong
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China.
| | - Minjiao Li
- College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China.
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Zhang L, Zhang Y, Wu F, Jiang Y, Wang Y. Insights into an Amorphous NiCoB Nanoparticle-Catalyzed MgH 2 System for Hydrogen Storage. Inorg Chem 2023; 62:5845-5853. [PMID: 36990661 DOI: 10.1021/acs.inorgchem.3c00567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
In the paper, we synthesized amorphous NiCoB nanoparticles by a simple chemical reduction method and employed them as high-activity catalysts to considerably improve the hydrogen storage properties of MgH2. The MgH2-NiCoB composite quickly absorbed 3.6 wt % H2 at a low temperature of 85 °C and released 5.5 wt % H2 below 270 °C within 600 s. It is worth noting that the hydrogenation activation energy was reduced to 33.0 kJ·mol-1. Detailed microstructure analysis reveals that MgB2, Mg2Ni/Mg2NiH4, and Mg2Co/Mg2CoH5 were in situ generated during the first de/absorption cycle and dispersed at the surface of NiCoB. These active ingredients created lots of boundary interfaces to facilitate the hydrogen diffusion and destabilize the Mg-H bonds, thus decreasing the kinetic barriers. This work provides support for a promising catalytic effect of amorphous NiCoB on de/absorption reactions of MgH2, showing new ways for designing Mg-based hydrogen storage systems toward practical application.
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Affiliation(s)
- Liuting Zhang
- School of Energy and Power, Instrumental Analysis Center, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Yan Zhang
- School of Energy and Power, Instrumental Analysis Center, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Fuying Wu
- School of Energy and Power, Instrumental Analysis Center, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Yiqun Jiang
- Max Planck Institute for Iron Research, 40237 Düsseldorf, Germany
| | - Yijing Wang
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, NanKai University, Tianjin 300071, China
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