Journal of Physical Chemistry Letters
·
2024
·
IF 4.8
Zibo Cheng,Yeqin Guan,Hong Wen,Zhao Li,Kaixun Cui,Qijun Pei,Shangshang Wang,Claudio Pistidda,Jianping Guo,Hujun Cao,Ping Chen
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.
研究领域:
储氢
·
材料科学
·
表面化学
·
光化学
·
半导体氢化物
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2014
·
IF 2.93
Wei Yuan Pan,Bin Hong Liu,Zhou Peng Li
In this study, we synthesized ZrO 2 nanorods through a hydrothermal process as a catalyst precursor for the reversible hydrogen storage reaction between 2LiH + MgB 2 and 2LiBH 4 + MgH 2. The 2LiH + MgB 2 composites doped with the ZrO 2 nanorods demonstrated superior and stable hydriding/dehydriding kinetics upon cycling. The XRD , SEM and HRTEM results revealed that the doped ZrO 2 nanorods were transformed into ZrB 2 nanoparticles with a size of a few nanometers during the first hydrogenation. The initial nanosize of the ZrO 2 catalyst precursor accounted for the formation of extremely fine ZrB 2 nanoparticles , which acted as heterogeneous nuclei of MgB 2 . The present study provides a new route for performance enhancement of complex hydride composites through manipulating the nanostructure of catalysts.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2023
·Vol. 16
·期 22
·e202300813
·
IF 8.4
Runze Wang,Wenbo Gao,Sheng Feng,Yeqin Guan,Qianru Wang,Jianping Guo,Ping Chen
Chemical looping ammonia synthesis (CLAS) is a promising alternative route to ammonia production because of its advantages of avoiding competitive adsorption of N 2 and hydrogen source (H 2 O or H 2 ) and intervening the scaling relations in the catalytic process. Our previous studies showed that NH 3 can be synthesized at low temperatures via a CLAS mediated by an alkali or alkaline earth metal hydride-imide couple with the aid of transition metal catalysts. Herein, we demonstrate that a group-IIB metal Zn, which has rarely been studied in the thermal-catalytic process, can significantly promote the performance of the lithium hydride-lithium imide (LiH−Li 2 NH)-mediated CLAS process (denoted as Zn−LiH−Li 2 NH). The addition of Zn dramatically changes the reaction pathway of the LiH−Li 2 NH mediated loop by forming a series of intermediates including Li 2 NH, lithium zinc intermetallic compounds (LiZn x ), and a ternary metal nitride (LiZnN). LiZnN together with Li 2 NH functions as nitrogen carrier in the Zn−LiH−Li 2 NH-mediated CLAS. Because of these properties, the kinetics of N 2 fixation is significantly enhanced with a reduction in apparent activation energy from 102 kJ mol −1 to 50 kJ mol −1 . The ammonia production rate reaches 956 μmol g −1 h −1 at 350 °C, which is 19 times higher than that of the neat LiH−Li 2 NH-mediated CLAS. Graphical Ammonia (NH 3 ) synthesis promoted by Zn : Zn is rarely used in NH 3 synthesis reaction. Here, it is found that Zn increases the NH 3 production rate 19 times compared to the only LiH−Li 2 NH-mediated chemical looping ammonia synthesis (CLAS) at 350 °C. It is mainly because Zn leads to new pathways for CLAS by forming a series of lithium zinc intermetallic compounds (LiZn x ) and a ternary nitride LiZnN.
研究领域:
催化化学
·
无机化学
·
能源化学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Yefei Wang,Ziheng Zhang,Xibo Zhang,Xiaowen Sun,Shasha Ge,Hua Xie,Ling Jiang,Fei Chang
Abstract Ammonia synthesis under mild conditions remains challenging because of the inertness of the N≡N bond and the limited ability of conventional catalysts to couple efficient dinitrogen activation with rapid hydrogenation. Here, we report a LiH/FePcG catalyst in which strong interfacial coupling between LiH and Fe–N–C sites enable efficient ammonia synthesis. Comprehensive characterization, including structural analysis, kinetic study, isotopic-labelling, gas-phase mass spectrometry, and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) reveal that the catalytic activity originates from interfacial active sites. Under reaction conditions, structural nitrogen atoms within the Fe–Nx moieties undergo reversible consumption and reconstruction, demonstrating the dynamic participation of the Fe–N–C framework in ammonia synthesis. Concurrently, hydridic hydrogen supplied by LiH directly participates in the initial hydrogenation steps, while the LiH/Fe–N–C interface generates Fe-centered multicomponent hydride species essential for N2 binding and activation. An inverse H/D kinetic isotope effect, an H2-promoted 28N2/30N2 exchange rate, in situ spectroscopic evidence, and density functional theory (DFT) calculations collectively support a non-classical, hydrogen-assisted pathway for dinitrogen activation rather than the conventional direct N≡ bond cleavage. These findings establish interfacial hydride chemistry as a cooperative mechanism for efficient ammonia synthesis and provide a strategy for designing advanced catalysts under mild conditions.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Ming Su,Huihu Wang,Huang Xu,Feng Chen,Haiping Hu,Jianchang Gan
Al-water reaction for hydrogen production faces the problems of long induction time and low conversion efficiency at low temperature (below 273.15 K), which has seriously limited its applications. To realize the instant hydrogen production of Al composites at low temperature, low melting point metals (Ga, In, Sn) and additives (NaCl, g-C 3 N 4 , LiH) were selected to prepare Al composites with high reactivity. Compared with the other Al composites, Al alloy/NaCl/LiH/g-C 3 N 4 composites exhibit the enhanced low temperature hydrogen production performance in 23 wt% NaCl aqueous solution at 253.15 K. For all Al alloy/NaCl/LiH/g-C 3 N 4 composites, the induction time of Al-water reaction at 253.15 K has completely eliminated. The highest hydrogen generation volume of 1095 mL·gAl −1 and the maximum hydrogen generation rate of 120 mL·gAl −1 ·s −1 were obtained for Al alloy/NaCl/1.5%LiH/g-C 3 N 4 composite. It is proposed that LiH can induce Al-water reaction instantly starting at 253.15 K. The released heat and micro alkaline environment further promote the Al-water reaction and enhance the hydrogen conversion efficiency. In particular, g-C 3 N 4 additive can improve the antioxidant properties of Al composites. This study provides a novel way for the development and application of Al composites in real-time hydrogen production at low temperature.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 33
·2405384
·
IF 27.4
Jinran Sun,Jitong Yan,Fan Li,Jiedong Li,Jun Ma,Gaojie Xu,Pengxian Han,Guangjin Hou,Yongfu Tang,Shanmu Dong,Jianyu Huang,Guanglei Cui
Lithium hydride (LiH) has been widely recognized as the critical component of the solid-electrolyte interphase (SEI) in Li batteries. Although the formation mechanism and structural model of LiH in SEI have been extensively reported, the role in electro-performance of LiH in SEI is still ambiguous and has proven challenging to explored due to the complicated structure SEI and the lack of advanced in situ experimental technology. In this study, the isotopic exchange experiments combined with isotopic tracer experiments is applied to solidly illustrate the superior conductivity and Li + conduction behavior of the LiH in natural SEI. Importantly, in situ transmission electron microscopy analysis is utilized to visualize the self-electrochemical decomposition of LiH, which is significantly distinctive from LiF and Li 2 O. The critical experimental evidence discovered by the work demonstrates ion transport behaviors of key components in the SEI, which is imperative for designing novel SEI and augurs a new area in optimizing the performance of lithium batteries.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Biao Yi,Guangfan Tan,Yanwei Huang,Dajun Xu,Yingjie Guo,Yingchun Zhang
Lithium hydride (LiH) is a neutron shielding material for space nuclear reactors, but research on its preparation, processing, and functional integration remains limited. This study systematically investigates the preparation process and properties of LiH ceramics to evaluate their potential application in neutron shielding systems for space reactors. Green bodies were prepared via cold pressing and sintered at 500°C, yielding highly dense (98%) ceramics with closed pores, uniformly distributed grains (3–5 μm), stable microstructure, and no significant cracks. Mechanical testing revealed compressive strength reaching 180.67 MPa and flexural strength of 35.21 MPa at the optimal sintering temperature. Thermal performance tests indicated that the ceramic's thermal conductivity exceeded that of the green body and exhibited a decreasing trend across a broad temperature range from room temperature to 500°C, demonstrating stable and predictable thermal behavior. Both MCNP simulations and experimental measurements using a 252 Cf neutron source confirm that thin-layer LiH ceramics achieve over 90% shielding efficiency for low to medium energy neutrons and demonstrate significant shielding effects for fast neutrons. Comprehensive analysis indicates that LiH ceramics can simultaneously achieve high density, excellent mechanical and thermal properties, and outstanding neutron shielding capability. This provides reliable process guidance for the design and application of shielding materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Jiaguang Zheng,Xuezhang Xiao,Yan He,Man Chen,Meijia Liu,Shouquan Li,Lixin Chen
The Mg(BH 4 ) 2 -AlH 3 - x LiH ( x = 0, 0.5, 1) novel ternary composites have been synthesized through mechanical ball milling, their favorable dehydrogenation properties and mechanism have been experimentally investigated. It can be found that during ball milling, a slight amount of Mg(BH 4 ) 2 would react with LiH and transform into LiBH 4 , while most Mg(BH 4 ) 2 remained stable after ball milling. Two major dehydrogenation steps can be detected in the Mg(BH 4 ) 2 -AlH 3 - x LiH composite, which belong to the decomposition of AlH 3 and Mg(BH 4 ) 2 , respectively. Remarkably, the onset hydrogen desorption temperature of Mg(BH 4 ) 2 -AlH 3 - x LiH composite can be reduced to 125.9 °C, with a total hydrogen desorption capacity of 10.3 wt%. It is worth emphasizing that the reversible dehydrogenation capacity is obviously improved to 3.8 wt%, compared to the Mg(BH 4 ) 2 -AlH 3 composite. This reversible capacity can be held for 3 cycles without obvious degeneration. Microstructural analysis on de/rehydrogenated composite has identified the regeneration of [BH 4 ] - in Mg(BH 4 ) 2 -AlH 3 -0.5LiH composite and revealed the role of LiH in the cycling hydrogen desorption and absorption processes. The formation of LiBH 4 and MgH 2 resulted from the rehydrogenation between MgAlB 4 and LiH could be helpful for the stability of reversible hydrogen storage performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 41
·19900-19908
·
IF 3.925
Hongwei Qiu,Xingbo Han,Shuyan Zang,Wei Liu,Guo Yang,Lijun Lv,Xiaofeng Wang,Jiaqi Duan,Shuangyu Wang
The MgH2–LiH composites with different composition ratios were prepared by different ball milling times, and the hydrogen generation performances of the composites were investigated and compared. X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy techniques were adopted to elucidate the performance improvement mechanisms. The results show that the hydrogen generation yield and kinetics can be improved with the increase of LiH content significantly. For the 7MgH2–3LiH and 1MgH2–1LiH, with the increase of the ball milling time, the hydrogen yield increases firstly, and then decreases, but the kinetics almost do not change. This may be caused by the change of particle size of the composites after ball milling. However, for the 9MgH2–1LiH, the hydrogen yield increases with ball milling time but the kinetics decrease gradually. This may be due to the gradual movement of LiH from the surface to the interior of MgH2 and to the covering of MgH2 after ball milling.
研究领域:
材料科学
·
无机化学
·
能源化学
·
纳米材料
·
储氢材料
✓ 已验证
DOI
高影响因子
JACS Au
·
2026
·Vol. 6
·期 8
·4679-4694
·
IF 8.5
Zhang Xibo,Tao Haolan,Wang Yefei,Zhao Yang,Wang Yuting,He Teng,Guo Jianping,Lian Cheng,Chang Fei
Photothermal catalysis offers a promising pathway for
sustainable
ammonia synthesis under mild conditions. However, its performance
is constrained by intrinsic scaling relations between dinitrogen activation
and subsequent hydrogenation steps. To overcome this long-standing
bottleneck, we design a Ru-LiH/TiN catalyst that enables a light-driven
reaction cascade, wherein lithium hydride (LiH) serves as a dynamic
“nitrogen mediator”. Under ambient pressure and illumination
at 3.3 W·cm –2 , the catalyst achieves an unprecedented
NH 3 production rate of 5574.3 μmol·g –1 ·h –1 (equivalent to 428.8 mmol·g Ru –1 ·h –1 ), representing
a 31-fold improvement over its thermal-catalytic counterpart and a
52-fold enhancement relative to Ru/TiN. Notably, the Ru-LiH/TiN exhibits
robust catalytic stability over 50 h, in stark contrast to the rapid
deactivation (<1 h) commonly observed in thermal catalysis due
to NH x ( x = 1–3)
accumulation-induced adsorbate poisoning. Mechanistic studies reveal
a relayed photothermal catalysis mechanism: photogenerated hot electrons
facilitate N 2 activation on Ru sites, followed by nitrogen
transfer to the LiH-TiN interface to form destabilized [Li–Ti–N-H]
intermediates; subsequently, photoexcited LiH liberates reactive hydrogen
species that participate in nitrogen hydrogenation. This work presents
a new strategy that simultaneously weakens the strong adsorption of
NH x on the catalyst and enables efficient
NH 3 production under mild conditions.
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 45
·2304285
·
IF 29.4
Yiqi Wei,Yaxiong Yang,Zichong Chen,Panyu Gao,Qihang Ma,Mingxi Gao,Chenhui Yan,Zhijun Wu,Yinzhu Jiang,Jian Chen,Xuebin Yu,Zhenglong Li,Xin Zhang,Yongfeng Liu,Mingxia Gao,Wenping Sun,Hongge Pan
LiBH 4 is a promising solid-state electrolyte (SE) due to its thermodynamic stability to Li. However, poor Li-ion conductivities at room temperature, low oxidative stabilities, and severe dendrite growth hamper its application. In this work, a partial dehydrogenation strategy is adopted to in situ generate an electronic blocking layer dispersed of LiH, addressing the above three issues simultaneously. The electrically insulated LiH reduces the electronic conductivity by two orders of magnitude, leading to a 32.0-times higher critical electrical bias for dendrite growth on the particle surfaces than that of the counterpart. Additionally, this layer not only promotes the Li-ion conductance by stimulating coordinated rotations of BH 4 − and B 12 H 12 2− , contributing to a Li-ion conductivity of 1.38 × 10 −3 S cm −1 at 25 °C, but also greatly enhances oxidation stability by localizing the electron density on BH 4 − , extending its voltage window to 6.0 V. Consequently, this electrolyte exhibits an unprecedented critical current density (CCD) of 15.12 mA cm −2 at 25 °C, long-term Li plating and stripping stability for 2700 h, and a wide temperature window for dendrite inhibition from −30 to 150 °C. Its Li-LiCoO 2 cell displays high reversibility within 3.0–5.0 V. It is believed that this work provides a clear direction for solid-state hydride electrolytes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）