Energies
·
2024
·Vol. 17
·期 19
·4769
·
IF 3
Osama A. Marzouk
The aim of this study is to quantitatively describe the anticipated change in the energy mix of the Sultanate of Oman (Oman) as the country moves forward in its national plan for green hydrogen, in order to become a global producer and exporter. This aim is achieved by curating recent data about energy projects in Oman that are either operating or planned (in a construction or pre-construction stage). Then, these data are processed further to extract useful insights about how the energy mix would change if the planned projects are realized and added to the operating ones. This reveals the serious commitment of the country to accomplish its national plan for green hydrogen (GH), where the green hydrogen production ambition for 2030 is about 1.125 million tons per annum (Mtpa), using a renewable energy capacity of approximately 18 GW. This ambition increases to about 3.5 Mtpa with approximately 70 GW of renewables in 2040, and increases further to about 8 Mtpa with approximately 180 GW of renewables in 2050. As a portrait of Oman’s energy mix with the assumption of successfully completing all planned energy projects, we found that the country is expected to have a total capacity of 83.1271 GW, with the share of renewables (solar and wind) reaching 83.133% (as compared to 15.0711 GW with an 8.907% renewables share for operating projects). Nearly all (precisely 99.571%) of the 68.0560 GW planned national energy capacity additions are based on solar or wind energy, while the traditional oil–gas energy is gradually phased out. Green hydrogen production dominates this surge in renewables penetration within the Omani energy mix, with 84.659% of the planned 34.3140 GW solar capacity additions linked with green hydrogen production, for operating water electrolyzers. Similarly, 98.804% of the planned 33.4500 GW wind capacity additions are linked with green hydrogen production.
研究领域:
能源研究
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Guilin Zhou,Xiaodong Zhang,Xin-Long Ni
A water-soluble terpyridine-based cationic fluorescent probe ( SP - TPy ) was synthesized, which emerged with pH-dependent amphiphilicity, resulting in self-assembly and disassembly in aqueous media with the aggregation-induced emission (AIE) property. In neutral water (pH 7.4), a moderate sensing response to Hg 2+ ions was given by the self-assembly of SP - TPy . However, in acidic aqueous media, the monomer of SP - TPy not only appeared to be highly selective and sensitive for Hg 2+ ions, but also displayed highly efficient removal of Hg 2+ ions from solution by rapid precipitation, which was attributed to the coordination-triggered reassembly of SP - TPy . The removal efficiency of SP-TPy f or Hg 2+ was found to be over 99%. Further study indicated that the precipitates were composed of various polyhedral porous frameworks, a property that was further used to adsorb H 2 S gas to form HgS complexes with higher uptake capacities. In addition, SP - TPy can be efficiently regenerated and recycled using a simple treatment with acidic water after adsorption of the H 2 S gas.
研究领域:
化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 9
·096504
·
IF 4.316
Xuan Jian,Tong-Tong Wei,Mi-Mi Zhang,Rui Li,Jian-Xin Liu,Zhen-Hai Liang
The design of high-performance catalysts for hydrogen evolution reaction (HER) is urgently needed in the development of renewable energy. Herein, we report a rapid strategy for synthesizing an efficient catalyst with ultralow-Pt nanoclusters on a two-dimensional titanium carbide (Ti3C2Tx) MXene support (denoted as Pt NCs-MXene, 5 μg cm−2) via electrophoretic deposition and cyclic voltammetry. The MXene support not only provides more active sites to anchor Pt nanoclusters (NCs) but also increases the electrochemically active surface area. The electrochemical HER performance of the as-synthesized Pt NCs-MXene catalyst was investigated in an acid electrolyte. The results showed that at a current density of 10 mA cm−2, the overpotential and Tafel slope of the Pt NCs-MXene were 40 mV and 50.8 mV dec−1, respectively, lower than those of the commercial 20 wt% Pt/C catalyst. The turnover frequency and mass activity of the Pt NCs-MXene were 7.09 H2 s−1 and 7.02 A mgPt−1, respectively, which were approximately 70 times those of the Pt/C catalyst. Moreover, the developed catalyst also exhibited a stable hydrogen evolution current for 18 h in a long-term cycling test. This work can provide novel and nontoxic methods for the preparation of low-Pt loading electrocatalysts for high-efficiency HER.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
DOI
高影响因子
Chemical Biology & Drug Design
·
2017
·Vol. 90
·期 2
·167-174
·
IF 2.396
Wei Shi,Miaobo Pan,Hao Qiang,Qianqian Qiu,Wenlong Huang,Haiyan Lin,Hai Qian,Liang Ge
A novel mitochondria-targeting fluorescent probe compound S-N 3 for hydrogen sulfide (H 2 S) in living cells has been designed and synthesized in this study. This article contained the chemosynthesis and some studies on bioactivity of the target compound in living cells. Compound S-N 3 is easy to synthesize and can remain stable under the effect of pH, system and photostability. In addition, it shows low cytotoxicity in cell imaging. And it can react with H 2 S highly selective in PBS or FBS solution, which would cause the obvious increase in fluorescence intensity. Therefore, the low-cost detection method for H 2 S is allowed for monitoring the quantity of H 2 S existed in the mitochondria.
研究领域:
生物化学
·
分子生物学
·
细胞生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2018
·Vol. 165
·期 5
·A746
·
IF 3.662
Hougao Xiong,Yutao Liu,Yifu Yang,Huixia Shao
A carbon-polytetrahydrofuran double-coated Na3V2(PO4)2F3 composite has been prepared by synthesis of carbon coated Na3V2(PO4)2F3 followed by in situ polymerization of tetrahydrofuran on its surface. Thermal gravimetry analysis, Fourier transform infrared spectrum and high-resolution transmission electron microscopy are used to confirm the encapsulation structure of the inner carbon layer and the outer polytetrahydrofuran layer on Na3V2(PO4)2F3. Electrochemical tests show that electrochemical performance and electronic conductivity of the composite are significantly improved due to the polytetrahydrofuran coating, and a reversible capacity of 123.6 mAh g−1 at a moderate 2 C rate is obtained with a high capacity retention of 98.5% after 250 cycles. Even at an extremely high rate of 10 C the discharge capacity is still as high as 115.8 mAh g−1 with a capacity retention of 80% over 400 cycles. Interestingly, sodium ion distribution in augmented triangular prismatic sites of Na3V2(PO4)2F3 is not unchanged, but shifts from the high energy Na(2)' site to the low energy Na(3)' site after a certain cycle, thus Na3V2(PO4)2F3 could obtain a higher energy density. The full cell coupled with the composite cathode and Na metal anode constructed with Na-Sn alloy substrate exhibits excellent rate discharge capability and good cycling stability. The nano-level carbon-PTHF double-coating developed in this work could provide a new way to improve Na+-storage and rate performance of Na-based materials.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Progress in Natural Science-Materials International
·
2020
·
IF 4
D.F. Wu,L.Z. Ouyang,J.M. Huang,J.W. Liu,H. Wang,X.S. Yang,H. Shao,M. Zhu
Hydrolysis of Zr(BH 4 ) 4 ·8NH 3 in deionized water can generate high purity hydrogen at room temperature. However, the sluggish hydrolysis kinetics of Zr(BH 4 ) 4 ·8NH 3 hinders its practical use. To improve its hydrogen generation properties, the effects of magnetic stirring, changing hydrolysis solution and tuning the ammonia coordination number on the hydrolysis properties of Zr(BH 4 ) 4 ·8NH 3 were investigated. Results show that both changing hydrolysis solution and tuning the ammonia coordination number can enhance the hydrolysis kinetics. The hydrolysis kinetics properties of Zr(BH 4 ) 4 ·8NH 3 were significantly improved in MgCl 2 and CoCl 2 solutions. The Zr(BH 4 ) 4 ·xNH 3 (x ≤ 8) samples were synthesized by a ball-milling method with different ammonization time (10, 60 and 180 min). Both the hydrolysis kinetics and hydrogen yield of Zr(BH 4 ) 4 ·xNH 3 (x ≤ 8) were enhanced as the ammonia coordination number (x) decreased. Thus, tuning ammonia coordination number is an effective way to control the hydrolysis properties of Zr(BH 4 ) 4 ·xNH 3 (x ≤ 8).
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2021
·
IF 5.373
Long Yan,Kunpeng Miao,Pengcheng Ma,Xiaoyan Ma,Ran Bi,Fang Chen
The coral-like gold micro/nanostructures were formed onto carbon cloth followed by a Prussian blue (PB) electrochemical deposition to construct a highly sensitive H 2 O 2 biosensor. The SEM image of PB/Au/CC showed the coral-like gold morphology, and EDS and XPS tests also further confirmed the successful loading of Au and PB. The electrochemical tests of PB/Au/CC displayed the electrode possessed excellent performance in sensing H 2 O 2 , which was quantified in the linear range from 0.002 to 13.97 mM at an applied potential of −0.05 V, with a sensitivity of 454.97 μA mM −1 cm −2 and a detection limit of 0.5 μM (S/N = 3). And then a convenient sensing platform was established via the cross-linking enzyme aggregates method, using PB as the mediator to realize the construction of glucose BIOSENSOR GOx EA @PB/Au/CC. The biosensor responded to glucose in the sensitivity of 70.76 μA mM −1 cm −2 within the linear range from 0.05 to 3.15 mM with a detection limit of 10 μM. The sensitivity was much higher than the electrode constructed by the cross-linking enzyme method (GOx@PB/Au/CC), and it was also highly selective, reproducible, and stable. Besides, the proposed biosensor was successfully applied to the glucose determination in real human serum samples, which proved its practicability.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Journal of Ocean University of China
·
2023
·Vol. 22
·期 6
·1572-1582
·
IF 1.6
Chen Lei,Li Quan,Wang Xing,Wang Wentai,Wang Lisha
The mercury species in the ocean (MeHg, Hg 2+ ) will be enriched in marine organisms and threaten human health through the food chain. While the excessive H 2 O 2 in the metabolic process will produce hydroxyl radicals and accelerate the aging of human cells, causing a series of diseases. Hence, the cost-effective and rapid detection of mercury and H 2 O 2 is of urgent requirement and significance. Here, we synthesized emerging graphitic carbon nitride quantum dots (g-CNQDs) with high fluorescence quantum yield (FLQY) of 42.69% via a bottom-up strategy by a facile one-step hydrothermal method. The g-CNQDs can detect the H 2 O 2 and Hg 2+ through the fluorescence quenching effect between g-CNQDs and detected substances. With the presence of KI, g-CNQDs show concentration-dependent fluorescence toward H 2 O 2 , with a wide detection range of 1–1000 µmolL −1 and a low detection limit of 0.23 µmolL −1 . The g-CNQDs also show sensitivity toward Hg 2+ with a detection range of 0–0.1 µmolL −1 and a detection limit of 0.038 µmolL −1 . This dual-function detection of g-CNQDs has better practical application capability compared to other quantum dot detection. This study may provide a new strategy for g-CNQDs preparation and construct a fluorescence probe that can be used in various systems involving H 2 O 2 and Hg 2+ , providing better support for future bifunctional or multifunction studies.
研究领域:
生物化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2022
·Vol. 53
·期 4
·847-860
·
IF 2.925
Liu Zuowei,Guo Xueyi,Tian Qinghua,Xu Zhipeng
Abstract The gallium electrowinning process is always accompanied by hydrogen evolution reaction that results in low current efficiency (CE). In this manuscript, cyclic voltammetry and chronoamperometry studies were carried out to investigate the gallium cathode behavior under various conditions and explore the parameter that is beneficial to improve the CE. The CE of the lead and copper cathodes was higher, while gallium deposited on the titanium, SUS316, and SUS304 cathodes was readily separated. Increasing the overpotential and gallium concentration or decreasing the pH within a certain range was all beneficial to improve the CE, while the temperature had no significant effect on the CE. Kinetic studies of gallium electrodeposition were carried out. The gallium electrodeposition process was determined as mixed control and forced convection is expected to further improve the CE. The apparent activation energy and kinetic current from the electrochemical reactions were determined to be 23.335 kJ mol −1 and 47.6 mA, respectively. Graphical abstract
研究领域:
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2017
·Vol. 410
·期 2
·349-359
·
IF 3.431
Sun Ya Kun,Jia Man,Yang Jian,Huang Yan-Ping,Liu Zhao-Sheng,Aisa Haji Akber
A method of preparing molecularly imprinted polymers (MIPs) with Zn(II) as a metallic pivot was adopted to solve the problem of imprinting compound with intramolecular hydrogen bonds by forming stronger coordination binding interaction among the template–functional monomer-Zn 2+ complex. A ternary porogenic system including dimethyl sulfoxide, dimethylformamide, and room temperature ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate was employed to fabricate imprinted monolith with high porosity and good flow-through properties, in which chicoric acid (CA), zinc acetate, 4-vinylpyridine (4-VP), and ethylene glycol dimethacrylate (EDMA) was the template, metallic ion, functional monomer, as well as crosslinker, respectively. The influence of polymerization factors including the 4-VP-CA ratio, monomer-crosslinker ratio, template-Zn 2+ ratio on imprinting factors was systematically investigated. When the ratio of 4-VP to CA was 24:1, the greatest IF value (24.81) was achieved on the CA-MIP prepared with zinc acetate. In addition, off-line SPE with the optimal MIPs monolith led to high purity of CA (98.0% ± 0.5%) from extraction of Cichorium intybus L. roots with the recovery of 77.5% ± 2.5% ( n = 6). As a conclusion, the strategy of introducing metal ions as metal pivot to prepare MIPs was a powerful method for the MIPs synthesis to the template molecules with intramolecular hydrogen bonds.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2024
·Vol. 40
·期 1
·29-35
·
IF 3.1
Wang Lulin,Cheng Xiaomeng,Dong Minghua,Luan Sen,Wu Yuxuan,Han Buxing,Liu Huizhen
The challenge of breaking 5-5′ bonds in lignin, attributed to their high bonding energy, has prompted the development of a new transformation pathway. Biphenyl, an important model compound for lignin, contains these 5-5′ bonds, making it crucial to devise a strategy for their cleavage in lignin transformation. This study introduces a novel method for transforming biphenyl, involving selective hydrogenation to cyclohexylbenzene by Ni/SiO 2 catalyst, followed by its oxidation to phenol and cyclohexanone through a radical mechanism. Results demonstrate that the catalysts with small particles have strong catalytic activity, while there is little difference in selectivity. The reason for the high selectivity of cyclohexylbenzene is due to the limited adsorption of cyclohexylbenzene on Ni/SiO 2 . This work presents a fresh approach to breaking resilient C—C bonds in lignin.
研究领域:
化学工程
·
可再生资源利用
·
催化科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Ping Su,Shikai Wang,Dong Zhang,Tengteng Liang,Huaihao Zhao,Nan Yang,Dafeng Zhang,Peiqing Cai,Xipeng Pu
Rational design of photocatalysts with photothermal effect to maximize light utilization is pivotal in achieving superior photocatalytic efficiency. In this work, by coating Cd 0.9 Zn 0.1 S (CZS) nanorods on hollow FeNi 2 S 4 (FNS) microspheres with photothermal effect, a novel FeNi 2 S 4 @Cd 0.9 Zn 0.1 S (FNS@CZS) Step-scheme (S-scheme) heterojunction photocatalyst was constructed for efficient photothermal-assisted hydrogen (H 2 ) evolution via simultaneously employing light and thermal energy. The hollow structure of FNS microsphere not only provides abundant reactive sites but also serves as a supportive substrate for CZS nanorods, effectively inhibiting their agglomeration. And the unique hollow structure of FNS allows for multiple reflections and refractions of visible light, enhancing the local temperature of the photocatalyst. This effectively minimizes thermal losses within the composite system, thereby enhancing the efficiency of light energy utilization. Furthermore, the formation of the S-scheme heterojunction facilitates the efficient separation of photogenerated charge carriers and enhances the activity of redox reactions, thereby boosting the overall photocatalytic activity. Experimental results reveal that the H 2 production rate of the FNS@CZS heterojunction reaches 12.9 mmol·g −1 ·h −1 , which is 25.1 times higher than that of pristine CZS. By controlling the experimental temperature, the impact of the photothermal effect on the photocatalytic H 2 production rate has been clarified. According to relevant evidence from infrared thermography and DFT calculations, comprehensive analyses and discussions were conducted on the photothermal effect and S-scheme charge transfer mechanisms. This study offers guidance on designing photothermal-enhanced photocatalysts to achieve satisfactory H 2 production activity.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）