INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Shuzhuang Sun,Yanmei Shen,Bocheng Yu,Guanghui Li,Kaitao Hong,Yaozu Wang,Yusheng Qiu,Yu Liu,Hui Zhou
2D-Ga 2 O 3 nanosheets sterically hinder pore entry for targeted Ga distribution. • NiGaSi shows superior activity and drastically reduced carbon deposition. • In-situ DRIFTS identifies carbonyls as key reactive intermediates. • Ga promotes CH 4 activation and inhibits coke formation via isolation effect. Dry reforming of methane (DRM) over Ni-based catalysts suffers from severe coking. We propose a spatially-selective Ga alloying strategy using trace 2D-Ga 2 O 3 to modify external Ni sites. The 2D-Ga 2 O 3 nanosheets, fabricated by air bubbling, are geometrically hindered from entering catalyst pores, enabling targeted surface distribution. After reduction, NiGa alloy forms and dilutes surface Ni ensembles to suppress carbon formation. NiGaSi achieves ∼54% CO 2 and ∼40% CH 4 conversions at 700°C, with only 14.8 wt% coke after 10 h versus 69.8 wt% for NiSi. In-situ DRIFTS identifies carbonyls as reactive intermediates with CH 4 cleavage as the rate-limiting step, while Ga donation promotes CH 4 activation. This morphology-enabled spatial design strategy offers a route for precise catalyst engineering.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
·
IF 20.2
Feng Long,Bo Zhang,Xincheng Cao,Xiaolei Zhang,Hanjie Ying,Junming Xu,Chenjie Zhu
Herein, we have achieved successful preparation of atomically dispersed catalytic systems, liquid metal Pt x /Ga catalysts, which eliminate the need for reduction processes. Notably, the 0.5 wt% Pt x /Ga catalyst exhibited exceptional stability in hydrogenation performance, achieving 100 % conversion of stearic acid with an impressive 98.7 % selectivity towards octadecane, especially with unprecedented stability over 19 recycling cycles. X-ray absorption spectra (XPS) and density functional theory (DFT) calculations unequivocally establish that isolated Pt atoms, benefitting from charge transfer from the Ga matrix, synergistically optimize Pt metal atom utilization, thereby efficaciously optimizing the d-band center and augmenting hydrogenation proficiency. Furthermore, isolated Pt configuration's weaker CO adsorption ability effectively mitigates concerns of catalyst poisoning and undesirable agglomeration, thereby engendering superior stability. The stronger adsorption with aldehyde and alcohol intermediates promotes the hydrogenation of stearic acid through hydrodehydration pathway, thereby ensuring a high carbon utilization economy. Overall, our work offers insight into the investigation of hydrogenation conversion of bio-derivatives over atomically dispersed catalytic systems.
研究领域:
催化化学
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材料科学
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理论计算化学
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
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IF 5.4
Yulan Xu,Minxian Wu,Xinlei Cheng,Shiying Wang,Dan Wang,Wenchang Wang,Naotoshi Mitsuzaki,Zhidong Chen
Gallium-based liquid metals are considered as promising catalysts for electrochemical CO 2 reduction due to their ability to effectively prevent the adhesion of byproduct carbon, which leads to the deactivation of electrode materials. In order to increase the specific area of liquid alloys, Ga-Sn thin liquid films were electrodeposited from a deep eutectic solvent composed of acetamide and dimethyl sulfone. Electrodeposition of Ga-Sn thin films with varying compositions that follow normal deposition behavior achieved, resulting in Sn rich in overall composition. To obtain Ga-rich thin liquid films, a straight forward and efficient two-step electrodeposition approach was employed. A layer of Ga thin film was firstly electrodeposited on the substrate, followed by electrodepositing a Sn layer. The prepared Ga-Sn thin films were applied for electrochemical reduction of CO 2 in a CO 2 -saturated 0.1 M KHCO 3 solution. Ga-Sn alloy with 91.6 at% Ga was in the liquid state at 25℃ and showed an excellent performance in reduction CO 2 to formate. The Faradaic efficiency reached 80 % and the partial current density was 46 mA cm −2 .
研究领域:
材料科学
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电化学
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环境科学
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高影响因子
JOURNAL OF LUMINESCENCE
·
2025
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IF 3.6
Yikun He,Yongheng Fu,Danni Yan,Shuai Yang,Li Zhang,Jiajun Xu,Feifan Song,Xiaokun Zhang,Yuhui Dong,Yousheng Zou
In recent years, Ag-In-Ga-S (AIGS) quantum dots (QDs) have received widespread attention as non-toxic and environmentally friendly QDs. However, the low photoluminescence quantum yield (PLQY) restricts the further application of AIGS QDs in optoelectronic devices. Here, we constructed quinary Ag-In-Zn-Ga-S (AIZGS) QDs with outstandingly high PLQY of 92.1% by doping Zn into AIGS QDs via an economical and environment-friendly hydrothermal method. The synergistic action of the internal doped Zn providing radiative recombination channels and the surface doped Zn passivating the non-radiative recombination defects leads to enhanced PLQY of QDs. The corresponding QDs backlight films fabricated based on AIZGS QDs and polyvinyl alcohol (PVA) also show a high PLQY of 82.7%. The improved PLQY of AIZGS QDs is comparable to other toxic metal-containing QDs in the same spectrum. Furthermore, the PL peak wavelength of the QDs can be tuned from 545 nm to 616 nm by varying the Ag/In ratio. The realization of high PLQY in aqueous AIZGS QDs and its backlight films contributes to the application in the field of eco-friendly backlight display devices.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Xianwei Meng,Bangdeng Du,Xueqing Chen,Qian Li,Jing Liu
The exceptional electron transport performance and high stability of titanium dioxide (TiO 2 ) make it widely used in the electron transport layer (ETL). However, the presence of numerous surface defects in TiO 2 layer can lead to unnecessary non-radiative recombination, which reduces carrier mobility and affects the photoelectric conversion efficiency (PCE) of perovskite solar cells (PSCs). Therefore, tremendous researches have been focused on reducing surface defects and improving carrier mobility in TiO 2 layer. In this study, we adopted metal gallium (Ga) with high conductivity at room temperature as an optimization strategy to enhance the performance of TiO 2 layer. By incorporating metal Ga into the TiO 2 precursor solution, we successfully fabricated a TiO 2 -Ga layer that exhibits reduced surface defects and optimized energy level structure. This provides an efficient pathway for electron transport in perovskite layer. Experimental results demonstrate that (methyl ammonium lead tribromide) MAPbBr 3 perovskite solar cell devices based on TiO 2 -Ga layer achieve nearly 24% higher PCE compared to those based on pure TiO 2 layer. This successful optimization strategy utilizing metal Ga offers novel insights and approaches for enhancing the performance of PSCs.
研究领域:
材料科学
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能源技术
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高影响因子
Nanoscale
·
2020
·Vol. 12
·期 16
·9208-9218
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IF 6.895
Jie Guo,Jun Cheng,Hui Tan,Qichun Sun,Jun Yang,Weimin Liu
The development of a high-performance nanoparticle (NP) additive for lubricating oil is a research hotspot for the tribology and engineering areas. In this study, the concept of a novel liquid nano-additive has been proposed based on the emergence of Ga-based liquid metals (GLMs), which display excellent extreme-pressure and high-temperature lubricity. Herein, the liquid NPs (designated as GLM-NP/C12) were prepared from a GLM droplet through the ultrasonic method, modified with 1-dodecanethiol, and are mainly distributed at 286 ± 21 nm. They have a core–shell structure with liquid-state GLM on the inside, and gallium oxide and a self-assembled alkylthiolate monolayer on the outside. In terms of the tribological performance, GLM-NP/C12s have a wonderful dispersion-stability in PAO10 oil, and provide excellent anti-adhesion, friction-reducing, and wear-resistance properties. When the additive concentration was 0.17 wt% in PAO10, the friction coefficient was reduced by 39% and the wear rate was reduced by 93% compared to those lubricated by the neat PAO10. This kind of liquid nano-additive has the advantages of easy preparation, internal composition regulation and recyclability, compared to conventional solid NPs. In addition, the liquid NPs were readily introduced into the frictional interfaces. More generally, the optimal additive concentration of the liquid NPs was much lower than that of the solid NPs. This observation has important implications for understanding the differences of the lubrication mechanisms between the solid and liquid nano-additives, and may provide a new design method and strategy of nano-additives for lubricating oil.
研究领域:
材料科学
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机械工程
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表面工程
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
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IF 8.758
Yan Zhao,Quanrong Deng,Ruxin Guo,Zhiheng Wu,Yukun Li,Yanyan Duan,Yonglong Shen,Wei Zhang,Guosheng Shao
The scalability processing of all functional layers in perovskite solar cells (PSCs) is one of the critical challenges in the commercialization of perovskite photovoltaic technology. In response to this issue, a large-area and high-quality gallium-doped tin oxide (Ga-SnOx) thin film is deposited by direct current magnetron sputtering and applied in CsPbBr3 all-inorganic PSCs as an electron transport layer (ETL). It is found that oxygen defects of SnOx can be remarkably offset by regulating oxygen flux and acceptor-like Ga doping level, resulting in higher carrier mobility and suitable energy level alignment, which is beneficial in accelerating electron extraction and suppressing charge recombination at the perovskite/ETL interface. At the optimal O2 flux (12 sccm) and Ga doping level (5%), the device based on sputtered Ga-SnOx ETL without any interface modification shows a power conversion efficiency (PCE) of 8.13%, which is significantly higher than that of undoped SnOx prepared by sputtering or spin coating. Furthermore, a PCE of 5.98% for a device with an active area of 1 cm2 is obtained, demonstrating great potential in fabricating efficient and stable large-area PSCs.
研究领域:
材料科学
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光伏技术
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能源工程
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 30
·14930-14938
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IF 9.931
Y. F. Cui,W. Jiang,S. Liang,L. F. Zhu,Y. W. Yao
A series of In/Ga-based MIL-68s, with batch molar ratios of In(III) to Ga(III) (In/Ga ratio) equaling 5 : 0, 4 : 1, 3 : 2, 1 : 1, 2 : 3, 1 : 4, and 0 : 5, were solvothermally prepared. Calcinating the as-prepared MOFs at 500 °C for 3 h produced a series of mesoporous In/Ga oxides (IGOs) of hexagonal morphology with a characteristic main pore radius of 3 nm to 12 nm, and a specific surface area of up to 60–135 m2 g−1. Studies on the ethanol gas-sensing properties of the as-prepared IGOs revealed that the two IGOs produced from MIL-68 with In/Ga ratios of 3 : 2 and 1 : 1 present high response values of 80–110 towards 300 ppm ethanol and a low detection limit of no more than 2 ppm. However, the response value of In2O3, produced from MIL-68 with an In/Ga ratio of 5 : 0, was 11 towards 300 ppm ethanol. At the same time, the two IGO samples exhibited a high response to ethanol, which was more than 2.6 times higher than response values towards CH3CHO, CH3COCH3, H2, CO, CH4, and NO2, at a concentration of 300 ppm. This gas-sensing performance is suggested to be attributed to their comparatively larger specific surface area, and remarkable oxygen vacancy capabilities.
研究领域:
材料科学
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化学工程
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纳米技术
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传感器
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
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IF 5.401
Zhichao Zeng,Ruiyue Ma,Chun Liu,Yongqian Xu,Hongjuan Li,Fengyu Liu,Shiguo Sun
The application of Ga-based compounds in medical and industrial fields could induce accumulation of gallium in the human body, and further exert certain Ga-toxic effect on health. So it is very important for gallium detection in biological aspects and different environments. Fluorescent analysis owning various merits surpass other analytic methods and received great attention recently. In this work, a biomimetic crab-like fluorescent probe denoted as NL was designed and successfully synthesized, which can selectively recognize Ga 3+ from other metal ions in acetate buffer/DMSO ( v/v = 1/1, pH = 5. 2), and the limit of detection was 12. 89 nM. Moreover, this probe can detect Ga 3+ in complex environments, such as human serum and urine, pork, rabbit kidney and rabbit liver, and even in simulated pollution water. Besides, the proposed method can provide portable test for Ga 3+ and reach a detection limit to 1. 2 mg/Kg by naked eye under ultraviolet irradiation, which is lower than the toxic concentration (4 mg/Kg) of Ga 3+ permitted in organs. The results indicated that NL can be further applied in clinical examination and environmental detection, and the biomimetic designing can provide reference to the development of other fluorescent sensors.
研究领域:
分析化学
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生物医学
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环境科学
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
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2017
·Vol. 32
·期 3
·e4177
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IF 2.319
Shaohua Wen,Yongfei Li,Weixing Chen,Yaping Lei,Chunyan Luo,Yonggang Hou
A series of L-lactide (LLA), 1,3-trimethylene carbonate (TMC) and glycolide (GA) terpolymers (LTG) of different monomer molar ratios were synthesized by using ring-opening copolymerization. An effective and low-toxic zirconium (IV) acetylacetonate Zr(Acac) 4 was used as catalyst. The viscosity-average molecular weights ( M η ) of obtained polymers were all above 2.2×10 4 g/mol. The chemical structure and viscosity of terpolymers were confirmed by Fourier transform infrared spectroscopy (FTIR), 1 H nuclear magnetic resonance ( 1 HNMR), 13 C nuclear magnetic resonance ( 13 CNMR) and an Ubbelohde viscometer. The thermal and mechanical properties were investigated by means of differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), X-ray diffraction (XRD) and stress-strain measurements. Results suggested that all terpolymers were amorphous and showed good thermal stability. Also it was found that elongation increased with the decreasing of LLA unit. More importantly, terpolymers displayed shape memory property when deformation temperatures were 14-15 °C above T g .
研究领域:
高分子化学
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材料科学
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高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2022
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IF 2.042
Dan Sun,Xiaonian Tang,Xi-ang Tian,Li Liu
Pure and Ga-doped 3 D ordered porous SnO2 (3DOPS) and SnO2 nanoparticles (NPs) were prepared. The 3DOPS/3% Ga-based sensor exhibits an improved response (61/50 ppm) to formaldehyde (HCHO), and the response is 3 times higher than pure 3DOPS (21/50 ppm) at low temperature (220 °C). However, the response of SnO2 NPs/3% Ga (10/50 ppm) is only 1.25 times that of the pure SnO2 NPs (8/50 ppm). Regardless of the SnO2 morphology, doping with Ga can improve its response. However, after the 3 D ordered porous structure of SnO2 doped with Ga element, its response is improved more obviously than that of the particle structure of SnO2. This may be attributed to the combined effect of the construction of the three-dimensional ordered porous structure and the doping elements.
研究领域:
材料科学
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环境监测
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高影响因子
JOURNAL OF CATALYSIS
·
2021
·
IF 7.92
Feng Sha,Chizhou Tang,Shan Tang,Qingnan Wang,Zhe Han,Jijie Wang,Can Li
Catalytic conversion of CO 2 into methanol utilizing green hydrogen produced from renewable energy is a promising route to realize carbon neutrality. Although ZnZrO x solid solution catalyst displays excellent catalytic performance, it is still highly desired to make any further improvement. Herein, we found the promoting effect of incorporating Ga into ZnZrO x solid solution catalyst in CO 2 hydrogenation to methanol. Ga promoted ZnZrO x (GaZnZrO x ) solid solution catalyst exhibits CO 2 conversion of 8.8% and methanol space time yield of 630 mg g cat −1 h −1 that are higher than those of ZnZrO x solid solution catalyst (7.7%, 556 mg g cat −1 h −1 ) at 320 °C, while the highly selectivity toward methanol remains unchanged. Chemisorption and H 2 -D 2 exchange results show that GaZnZrO x solid solution catalyst displays higher capacity for the adsorption and activation of H 2 than ZnZrO x solid solution catalyst. Electron paramagnetic resonance result suggests that more oxygen vacancies are derived after incorporating Ga into ZnZrO x solid solution catalyst. In situ diffuse reflectance infrared Fourier transform spectra indicate that the HCOO* and CH 3 O* species are the main intermediate species. The higher IR intensity of intermediate species and lower CH 3 O*/HCOO* ratio on GaZnZrO x solid solution catalyst suggest that the hydrogenation of HCOO* to CH 3 O* is boosted. These results reveal the promoting effect of incorporated Ga into ZnZrO x solid solution catalyst that improves the adsorption and activation of H 2 and CO 2 , thus enhancing catalytic performance of methanol synthesis from CO 2 hydrogenation.
研究领域:
催化化学
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能源科学
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高影响因子
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