CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Hong-Si Guo,Wenfeng Zhao,Qingmei Ge,Nan Jiang,Mao Liu,Hang Cong
A promising method for producing hydrogen from solar energy and converting it into chemical fuels is photoelectrochemical (PEC) water splitting. In this paper, a novel photoanode is prepared by hydrothermal growing of nanorod CdS/g-C 3 N 4 /Q[7] heterojunction on FTO substrate for photoelectrochemical water splitting to produce hydrogen. In this method, Q[7]-doped g-C 3 N 4 is tightly combined with CdS composite and substrate, which significantly improves the separation and migration of photogenerated carriers in g-C 3 N 4 /Q[7] and CdS, and effectively reduces the internal resistance of the photoanode. Compared with the free CdS NRs, the PEC performance of the heterojunction CdS/g-C 3 N 4 /Q[7]-10 is significantly enhanced with the improved photocurrent density of 1049.7 μA/cm 2 under AM 1.5 G (100 mW/cm 2 ) simulated sunlight, which is 3.6 times that of pristine CdS and 2.6 times that of FTO-CdS/g-C 3 N 4 under the same conditions. The external bias photocurrent conversion efficiency and photohydrogen conversion efficiency of CdS/g-C 3 N 4 /Q[7]-10 photoanode at 0.7 V (relative to RHE) are measured to be both 0.31 %, as 3.1 times high as that of the original CdS NRs (0.10 %), and 2.07 times high as that of FTO-CdS/g-C 3 N 4 (0.15 %). The generation of heterostructure with interfacial interaction reduces the recombination of photogenerated electron-hole pairs, to enhance the charge transfer of water oxidation kinetics, allowing electrons to quickly transfer through the external circuit to the counter electrode for H + reduction to produce H 2 . A schematic diagram of the photoelectrochemical water splitting hydrogen evolution process with the heterojunction CdS/g-C 3 N 4 /Q[7]-10 is systematically proposed.
研究领域:
材料科学
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能源转换
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光电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Jialong Wang,Longbin Chen,Yaodong Yang,Tiancheng Hou,Wei-Feng Rao
Piezoelectric catalytic seawater hydrogen production is one of the most crucial and potential hydrogen production strategies. However, the low surface activity and the high carrier recombination rate limit the further improvement of catalytic efficiency. To solve this problem, we prepared SrBi 4 Ti 4 O 15 (SBTO) and FeS 2 (FS) heterojunctions, which can effectively utilize the valence state transformation cycle between Fe 2+ and Fe 3+ to improve the surface activity and maintain carrier separation. This mechanism of Fe 2+ and Fe 3+ conversion is similar to the well-known Fenton reaction. It was confirmed by electrochemical measurements that with the help of FeS 2 , SBTO possessed a stronger piezoelectric current response and faster carrier transfer rate. Piezoelectric catalytic seawater splitting H 2 evolution rate of SBTO-25 %FeS 2 could reach 31 mmol g -1 h −1 , which is higher than that of other piezoelectric materials in similar conditions. Our findings provide valuable insights for further improving the efficiency of seawater hydrogen production efficiency.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 26
·8314-8322
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IF 7.393
Xue Jiang,Zemeng Dong,Jing Wang,Ning Zhang,Guang-Rui Xu,Wen Zhang,Jianping Lai,Zhenjiang Li,Lei Wang
Although water electrolysis provides a promising technology for global hydrogen economics, highly efficient electrocatalysts are required to boost the sluggish kinetics of both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under neutral conditions. Herein, we synthesized novel polyethyleneimine (PEI) functionalized Echinops-like Rh porous nanostructures (Echinops-like Rh PNNSs) by a solvothermal method, which originated from the self-assembly of Rh two-dimensional (2D) sub-nanoflakes with 1.2 nm thickness. As a good electron donor, −NH2 on PEI could modulate the electronic structure of Echinops-like Rh PNNSs, reducing the adsorption energy of H2O on the surface of Echinops-like Rh PNNSs. Meanwhile, −NH2 groups could specifically enrich H2O molecules under neutral conditions, which facilitates water splitting. The as-synthesized Echinops-like Rh PNNSs exhibit high HER activity with ultralow overpotential, low Tafel slope, and excellent stability. Moreover, the Echinops-like Rh PNNSs also showed an enhanced OER activity than commercial RuO2 with a small overpotential of 79.5 mV at 10 mA cm−2 in neutral media. When using Echinops-like Rh PNNSs as both anode and cathode catalysts for overall seawater splitting, a cell voltage of only 1.61 V is needed for generating 10 mA cm−2 current density, greatly boosting the efficiency of seawater splitting.
研究领域:
材料科学
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化学工程
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Dong Wang,Fengqin Tang,Hui Bai,Pengju Wu,Yaju Zhang,Lingyun Fang,Beibei Sun,Chunhui Shi,Libing Hu
The fabrication of advanced electrocatalysts for urea-assisted electrolytic water splitting is of great significance for yielding green hydrogen. In this study, Ce doping a quaternary sea urchin like medium-entropy NiCoFe layered double hydroxide (Ce 1.2 -NiCoFe-LDH) nanoshe et s were obtained by employing a doping engineering strategy. Characterization experimental results confirmed that Ce dopants could modify the oxygen vacancy structure of NiCoFe-LDH, accelerating charge and mass transfer. thereby enhancing the urea decomposition. The electrochemical results indicated that Ce 1.2 -NiCoFe-LDH demonstrated high-efficiency catalysis for UOR, characterized by high intrinsic activity, rapid kinetics, and robust durability. The overpotential of Ce 1.2 -NiCoFe-LDH was only 48 mV at the current density of 10 mA cm −2 , much lower than the commercial IrO 2 (126 mV at 10 mA cm −2 ). The tafel slope of Ce 1.2 -NiCoFe-LDH (62 mV dec −1 ) was also better than those of IrO 2 (88 mV dec −1 ) and NiCoFe-LDH (99 mV dec −1 ). Compared with the commercial IrO 2 , the Ce 1.2 -NiCoFe-LDH exhibited a change of only 3.2 % after a 12-hour chronoamperometric test, indicating an improvement in stability. Impedance comparison between the two hydrotalcites revealed that Ce 1.2 -NiCoFe-LDH possessed lower impedance, potentially enhancing catalytic efficiency. Therefore, this work illustrates that the modulation of oxygen vacancies in electrocatalysts, induced by the heteroatom doping effect, can enhance the electrocatalytic oxidation performance of small molecules for hydrogen production.
研究领域:
材料科学
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电化学
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Lili Guo,Jingqi Chi,Jiawei Zhu,Tong Cui,Jianping Lai,Lei Wang
Seawater electrolysis is an efficient method for producing carbon-neutral hydrogen; however, it is hindered by high energy cost and chlorine evolution reaction. In this study, we report Ru, P dual-doped NiMoO 4 multichannel nanorods in-situ grown on nickel foam (Ru/P-NiMoO 4 @NF), which can achieve chlorine-free hydrogen production by coupling seawater splitting with thermodynamically favorable urea oxidation . The Ru/P-NiMoO 4 @NF exhibits bifunctional activity with working potentials of 0.23 V to deliver 3000 mA cm −2 for HER and 1.46 V to deliver 1000 mA cm −2 for UOR. The overall urea splitting system in the two-electrode electrolyzer require low voltage of 1.73 V to drive 500 mA cm −2 , and demonstrate remarkable durability to keep above 100 mA cm −2 for 145 h. Density functional theory calculations reveal that dual-doping modulate the d -band center of catalyst, thus enhancing the adsorption of reactants and intermediates. This work provides information for designing catalysts for combing seawater splitting with urea purification.
研究领域:
材料科学
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电催化
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 20
·8101-8108
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IF 8.067
Meiling Xu,Chaomin Gao,Shan Yao,Shubo Sun,Lina Zhang,Kui Li,Xin Cheng
Facilitating the efficient separation of charge carriers is vitally crucial to achieving highly effective photocatalytic intermediate water splitting without any sacrificial reagents in pure water. Herein, the directional modulation separation of charge carrier strategy is proposed for Zn0.5Cd0.5S based on MOF-derived Co@NC and Co–Pi serving as dual charge transfer materials. The Co@NC acts as the electron transporting material to capture electrons and Co–Pi serves as the hole transporting material to extract holes, achieving the efficient separation of charge carriers and dramatically enhancing the photocatalytic performance. Moreover, the improved specific surface area can also provide more abundant active sites. The optimized Co@NC/Zn0.5Cd0.5S/Co–Pi sample achieved yields of H2 and H2O2 of up to 613.8 and 592.7 μmol h−1 g−1 in pure water, which are 13.2 and 14.4 times higher than that of pristine Zn0.5Cd0.5S, accompanied by a notable apparent quantum efficiency of 2.73% at 420 nm and the longest photocatalytic stability for 90 h. This work illustrates the importance of charge carrier separation to the photocatalytic performance and paves the way for designing highly efficient photocatalytic systems without sacrificial reagents.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 46
·2300625
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IF 19
Jingqi Chi,Lili Guo,Jiayu Mao,Tong Cui,Jiawei Zhu,Yanan Xia,Jianping Lai,Lei Wang
The electrocatalytic production of hydrogen from seawater provides a low-cost way to realize energy conversion, but is restricted by high potential for seawater electrolysis and the chlorine oxidation reaction (ClOR) at the anode. Here, the self-growth of Mo-doped Ni 2 P nanosheet arrays with rich P vacancies on molybdenum-nickel foam (MNF) (Mo-Ni 2 P v @MNF) is reported as bifunctional catalyst for Cl-free hydrogen production by coupling hydrogen evolution reaction (HER) with hydrazine oxidation reaction (HzOR) in seawater. Impressively, the Mo-Ni 2 P v @MNF electrode as bifunctional catalyst has an excellent activity for overall hydrazine splitting (OHzS) with an ultralow voltage of only 571 mV at 1000 mA cm −2 and can maintain stability for an ultra-long time of 1000 h at 100 mA cm −2 . Moreover, integration of OHzS into self-assembled hydrazine fuel cells (DHzFC) or solar cells can enable the self-powered H 2 production. The industrial hydrazine sewage as feed for the above eletrolysis system can be degraded to ≈5 ppb rapidly. Density functional thoery calculations demonstrate that the electronic structure modulation induced by P vacancies and Mo doping can not only achieve thermoneutral ΔG H* for hydrogen evolution reaction but also enhance dehydrogenation kinetics from *N 2 H 4 to *NHNH 2 for HzOR, achieving enhanced dehydrogenation kinetics.
研究领域:
材料科学
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电催化
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 51
·2308191
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IF 19
Jianxi Lu,Songbo Chen,Yuling Zhuo,Xinya Mao,Dong Liu,Zhenbo Wang
Hydrogen production through seawater electrolysis faces several challenges, one of which involves the development of electrocatalysts with high catalytic performance. Here, surface amorphization and morphology engineering are combined to design a novel electrocatalyst for highly-efficient hydrogen evolution reaction (HER). The surface-amorphized MoO 2 /Ni 3 (PO 4 ) 2 microcolumns supported on nickel foam (SA-MoO 2 /Ni 3 (PO 4 ) 2 /NF) display remarkable performance with low overpotentials of 34 and 46 mV at a current density of 10 mA cm −2 in 1 m KOH and alkaline seawater, respectively. In addition, the alkaline electrolysis cell (AEC) integrated with SA-MoO 2 /Ni 3 (PO 4 ) 2 /NF as the cathode and Ni foam as the anode achieves a current density of 100 mA cm −2 at 1.87 V in 6 m KOH seawater at 60 °C, superior to that of industrial NiMo electrode as cathode (2.05 V). DFT calculations demonstrate that the surface amorphous layer (MoO x ) improves the hydrogen adsorption energy of sample and reduces the energy barrier of water dissociation. It is found that substantial improvement in catalytic performance stems from the synergistic effect between surface amorphization and unique microcolumn morphology. These findings may provide insights into combining surface amorphization and morphology engineering strategies to enhance catalytic performance and pave the way for the development of highly efficient seawater HER electrocatalysts.
研究领域:
材料科学
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能源化学
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 40
·2403863
·
IF 18.5
Huashuai Hu,Zhihang Xu,Zhaorui Zhang,Xiaohui Yan,Xiaoli Wang,Ye Zhu,Jiacheng Wang,Minghui Yang
Seawater hydrogen production, vital for sustainable energy solutions and freshwater preservation, faces challenges due to seawater complexity and high energy consumption. A strategy to modulate dehydrogenation kinetics of dual-phase metal nitrides using low-loaded Pt quantum dots (QDs), achieving stable and energy-efficient hydrogen generation is introduced. The Pt QDs@Ni 3 N-MoN/Ti catalyst displays outstanding bifunctional seawater catalytic performance, enabling efficient hydrogen production and hydrazine degradation in a flow anion exchange membrane water electrolysis (AEMWE) device. Operating at a low voltage of 1.41 V, it achieves 2 A cm −2 for 300 h, circumventing chlorine corrosion and yielding record-breaking energy equivalent input (2.68 kWh m −3 H 2 at 1 A cm −2 ), a 47.1% reduction compared to traditional methods. Integration with solar and biomass energy facilitates self-powered hybrid seawater hydrogen production, highlighting its potential applications. This work facilitates energy-efficient marine resource conversion to green hydrogen and offers viable insights into industrial hazardous pollutant degradation using metal-nitride electrocatalysts.
研究领域:
能源科学
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材料科学
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电化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Tianyi Zhang,Jing Lu,Xue Li,Zhitao Zou,Mengdan Kong,Jixiang Xu,Vladimir Turkevich,Haifeng Lin,Yanyan Li,Lei Wang
Optimizing the Z-scheme charge transmission of lateral heterojunction constructed by single-layer (SL) nanosheets is an appealing yet challenging tactics to boost photocatalytic efficiency for solar fuel production and environmental remediation. Herein, we reported the edge/corner-specific growth of SL ZnIn 2 S 4 -MoSe 2 lateral heterojunction with intensified Z-scheme charge transmission through intimate Mo-S connection and S vacancies (V S ) engineering. The Mo-S chemical bonds inside ZnIn 2 S 4 -MoSe 2 heterojunction offer a speedy channel for Z-scheme charge transmission as confirmed via surface photovoltage spectroscopy, radical production, and in situ photo-irradiated X-ray photoelectron spectroscopy tests as well as density functional theory calculation, while V S engineering enlarges Fermi level difference between ZnIn 2 S 4 and MoSe 2 to strengthen internal electric field and driving force for photo-carriers transmission, resulting in an excellent photocatalytic H 2 evolution (PHE) capability. Isotopic labeling experiment verified the photocatalytic water reduction by ZnIn 2 S 4 -MoSe 2 heterojunction, which exhibited a visible-light-driven PHE rate up to 55.70 mmol g −1 h −1 (or 550.70 μmol/10 mg/h) with an apparent quantum yield reaching 38.9 % at 400 nm. Moreover, the ZnIn 2 S 4 -MoSe 2 heterojunction also possessed a robust stability during long-term photocatalytic reaction. The research findings could inspire new idea to enhance the photocatalytic capability of two-dimensional (2D) heterojunction by strengthening Z-scheme charge transmission at atomic level.
研究领域:
材料科学
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能源化学
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表面物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Zixiang Pei,Juan Hu,Zihan Song,Yang Zhang,Nan Ye,Lingyun Wang,Yuting Liu,Wanbing Guan
Solid oxide electrolysis cells (SOECs) are recognized for their efficient and versatile conversion of renewable energy into hydrogen's chemical energy. However, the long-term stability of large-scale seawater electrolysis remains an area that requires further exploration. In this work, Gd 0.2 Ce 0.8 O 2-δ (GDC) is impregnated into the fuel electrode channels of a large-scale flat-tube SOEC using an infiltration technique. This approach is designed to mitigate the degradation associated with charge transfer at the fuel electrode, thereby enhancing the cell's long-term operational stability. The GDC-decorated electrolysis cell exhibits stable operation over a 500 h period with seawater, with a degradation rate of approximately 0.015 %/h, which is less than half of the non-impregnated cell, which registers a degradation rate of 0.031 %/h. Utilizing the distribution of relaxation time technology, it is determined that the degradation of the electrolysis cell predominantly correlated with the oxygen ion transport and charge transfer processes at the fuel electrode, with no significant relation to the processes at the air electrode or to gas adsorption/desorption. This work demonstrates that the infiltration strategy for decorating the fuel electrode can effectively prolong the service life of SOECs.
研究领域:
能源材料科学
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纳米技术
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电化学工程
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Fuhao Liu,Zhiguo Yuan,Sen Zhao,Quande Che,Qian Ma,Junpeng Wang
Tetragonal BiVO 4 nanorod array exhibits excellent carrier transport properties, but due to its p-type conductivity, it can only be used as a photocathode. In this study, an n-type tetragonal BiVO 4 nanorod array doped with molybdenum was successfully fabricated on fluorine-doped tin oxide (FTO) glass substrates via the hydrothermal method. The doping of Mo and its corresponding concentration were accurately ascertained through X-ray photoelectron spectroscopy (XPS) and inductively coupled plasma (ICP) techniques. Computational simulations revealed that Mo doping induces a shallow donor level beneath the conduction band of BiVO 4 . Notably, the structure and morphology of BiVO 4 did not undergo significant changes after Mo doping, but the conductivity type and conductivity of the surface samples were greatly improved as evidenced by Mott-Schottky and conductive atomic force microscopy (C-AFM) measurements. Impressively, the onset potential for oxygen production when utilized as a photoanode was merely 0.2 V vs RHE. More importantly, although its conduction band position is slightly lower than the hydrogen production potential, the doped sample still demonstrated outstanding activity in water splitting for hydrogen generation.
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
危险品化学品经营许可证（带存储）