INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Ling Wang,Wenzong Liu,Thangavel Sangeetha,Zechong Guo,Zhangwei He,Chuan Chen,Lei Gao,Aijie Wang
High overpotential and soaring prices of the cathode electrode are the bottlenecks for the development of microbial electrolysis technology for hydrogen production . In this study, a novel one-step electrodeposition method has been attempted to fabricate electrodeposited cathodes in situ growth of Ni–Co–S, Ni–S, Co–S catalyst on nickel foam (NF) to reduce the overpotential of electrodes. Finally, a uniform nanosheet with a high specific surface area and more active sites is formed on the NF surface, resulting in a lower overpotential than plain NF. At 0.8 V, the Co–S/NF cathode produces a favorable 42% increase in hydrogen yield (0.68 m 3 ·m −3 ·d −1 ), 40% upsurge in current density (10.6 mA/cm 3 ) and 39% rise of cathodic recovery rate (58.0 ± 3.2%) than bare NF, followed by Ni–Co–S/NF and Ni–S/NF cathode. All the electrodeposited electrodes demonstrate enhanced current density and reduced electron losses, thereby achieving efficient hydrogen production . These innovative varieties of electrodes are highly advantageous as they are relatively inexpensive and easy to manufacture with great potential in reducing costs and further real time application in large scale.
研究领域:
生物电化学
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材料科学
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可再生能源
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Ying-Jiao He,Liang-Hong Shu,Yan Xiong,Qun-Zeng Huang
Development of highly-efficient heterostructured photocatalysts capable of fully utilizing full solar spectrum has emerged as a focal point in photocatalytic H 2 evolution from water splitting. Herein, Mn 0.2 Cd 0.8 S/MoSe 2 composite was successfully constructed by attaching full-spectrum responsive MoSe 2 nanospheres on surface of Mn 0.2 Cd 0.8 S polyhedra via in-situ hydrothermal process. The optimal Mn 0.2 Cd 0.8 S/MoSe 2 -5wt% composite photocatalyst yielded the H 2 evolution rate of 34.31 mmol g –1 h –1 under full-spectrum light, significantly surpassing the activities obtained under near-infrared (NIR), ultraviolet (UV), visible (Vis), Vis-NIR and UV-Vis light alone. This outstanding property could be attributed to the synergetic effects of p−n heterojunction and photothermal effect, effectively accelerating interfacial charge transfer, elevating reaction system's temperature and expediting surface reaction, thereby promoting the photocatalytic reaction of Mn 0.2 Cd 0.8 S. This study offers a valuable perspective on utilizing MoSe 2 to construct an efficient photothermal-assisted photocatalysis system.
研究领域:
材料科学
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光催化
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可再生能源
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纳米材料
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氢气制备
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Ning Li,Wenwen Zhao,Linping Li,Yangqin Gao,Lei Ge
Photocatalysts with hollow structures have drawn great interest owing to their high specific surface area, which can enhance the photocatalytic performance. Herein, we designed the hollow cubic Cu2–xS@Ni–Mo–S nanocomposites by vulcanizing from the Cu2O template and loading the Ni–Mo–S lamellas. The Cu2–xS@Ni–Mo–S composites greatly improved the photocatalytic hydrogen performance. Among them, Cu2–xS–NiMo-5 achieved the optimal photocatalytic rate of 1326.07 μmol/g h, which is approximately 3.85 times higher than that of hollow Cu2–xS (344 μmol/g h) and had good stability for 16 h. The enhanced photocatalytic property was attributed to the metallic behavior of bimetallic Ni–Mo–S lamellas and the LSPR (localized surface plasmon resonance) effect of Cu2–xS. The bimetallic Ni–Mo–S can effectively capture the photogenerated electrons and quickly transfer-diffuse to produce H2. Meanwhile, the hollow Cu2–xS not only provided many more active sites to take part in the reaction but also introduced the LSPR effect to increase the solar utilization. This work provides valuable insights into the synergistic effect of using non-precious metal co-catalysts and the LSPR materials to assist in the photocatalytic hydrogen evolution.
研究领域:
材料化学
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光催化
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能源科学
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纳米材料
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半导体物理
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可再生能源
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表面科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Zhiyong Mao,Jingjing Chen,Yanfang Yang,Dajian Wang,Lijian Bie,Bradley D. Fahlman
Novel g-C3N4/CoO nanocomposite application for photocatalytic H2 evolution were designed and fabricated for the first time in this work. The structure and morphology of g-C3N4/CoO were investigated by a wide range of characterization methods. The obtained g-C3N4/CoO composites exhibited more-efficient utilization of solar energy than pure g-C3N4 did, resulting in higher photocatalytic activity for H2 evolution. The optimum photoactivity in H2 evolution under visible-light irradiation for g-C3N4/CoO composites with a CoO mass content of 0.5 wt % (651.3 μmol h–1 g–1) was up to 3 times as high as that of pure g-C3N4 (220.16 μmol h–1 g–1). The remarkably increased photocatalytic performance of g-C3N4/CoO composites was mainly attributed to the synergistic effect of the junction or interface formed between g-C3N4 and CoO.
研究领域:
材料科学
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光催化
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能源化学
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纳米科技
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可持续能源
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Rui Li,Qiongke Shi,Luyang Zuo,Yingjun Chen,Wenqiang Li,Huitao Fan,Bo Li,Liya Wang
The shortage of fossil energy has become a growing global concern. It is particularly important to make full use of the infinite solar energy resources, and transform them into sustainable and clean energy. The development of hydrogen energy has become a feasible solution to solve the energy shortage problem. The preparation of photocatalysts featuring efficient charge transfer channels and high hydrogen production activity provides a pathway for the development of hydrogen energy. In this paper, we report for the first time the direct assembly of 2D ZnIn 2 S 4 (ZIS) nanosheets on the surface of CoTiO 3 (CTO). The synthesized CoTiO 3 /ZnIn 2 S 4 (CTO/ZIS) photocatalyst features a direct Z-scheme charge transfer channel, which enhances the separation rate of photogenerated carriers, and accelerates the photocatalytic H 2 evolution (PHE) rate. Without the assistance of any co-catalyst, the PHE rate of prepared CoTiO 3 /ZnIn 2 S 4 was as high as 5.21 mmol g −1 h −1 . Moreover, the H 2 evolution rate of CoTiO 3 /ZnIn 2 S 4 almost did not decrease significantly after four consecutive 4 h cycles. This investigation provides a valuable approach for the exploitation of novel and efficient Z-scheme photocatalysts in the application of solar energy to hydrogen energy conversion.
研究领域:
材料科学
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物理化学
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能源化学
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光催化
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纳米材料
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可再生能源
✓ 已验证
DOI
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 9
·3034-3045
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IF 8.8
Ning Xue-Er,Jia Dian-Zeng,Li Shan-Hao,Khan Muhammad Farooq,Hao Ai-Ze
A highly efficient piezocatalyst of oxygen-incorporated MoS 2 (O-MoS 2 ) was designed and successfully synthesized via facile modulation of hydrothermal process temperature method. Remarkably, a superior piezocatalytic H 2 evolution rate of 46.1 μmol·g −1 ·h −1 in pure water and 921.0 μmol·g −1 ·h −1 in methanol solution is obtained on optimal O-MoS 2 -180 (with a hydrothermal process temperature of 180 °C), outperforming pristine MoS 2 and most of the reported other catalysts. Moreover, piezocatalytic activity of O-MoS 2 toward the degradation of organic pollutants depends on hydrothermal temperatures. The suitable temperature of O-MoS 2 -180 presents dramatically excellent piezocatalytic capacity compared with the pristine MoS 2 for degradation of methylene blue (MB) dye. The reaction rate constant of O-MoS 2 -180 reaches to 54.6 × 10 −3 min −1 , which is nearly 18 and 4-folds in contrast with pristine MoS 2 and O-MoS 2 -140 (with a hydrothermal process temperature of 140 °C), respectively. Simultaneously, it also manifests that O-MoS 2 -180 endows relatively high degradation efficiency (84.6% within 30 min) and excellent stability. Moreover, it is also demonstrated that optimal O-MoS 2 can dramatically promote charge carriers transport and separation. Furthermore, our theoretical calculation results suggest that the oxygen-incorporated can modulate the surface electronic state, enhance active sites as well as optimize the hydrogen adsorption Gibbs free energy of MoS 2 , thus extremely boosting piezocatalytic efficiency. Ultimately, an innovative piezocatalytic mechanism is proposed to reveal and expound the relationship between piezocatalytic property and oxygen-incorporated role. Graphical abstract
研究领域:
材料科学
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环境科学
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物理化学
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纳米催化
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能源材料
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表面科学
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2018
·Vol. 61
·期 7
·1001-1006
·
IF 4.318
Zhang Guo-Qiang,Ou Wei,Xu Yang-Sen
氢能源是未来最理想的清洁能源, 可以利用太阳能和光催化材料分解水获得. 开发廉价、 资源丰富、 环境友好的光催化材料, 成为近年来能源和环境领域的研究热点. 基于此, 我们报道了一种新型有机光催化材料-不含金属的荧光素超分子纳米片, 其在可见光下显示出高效的光催化分解水产氢活性, 产氢速率接近341 μmol g −1 h −1 , 在420±10 nm的波段下表观量子效率达到1.2%. 这是荧光素超分子晶体首次被报道并应用于可见光下分解水产氢, 这一发现丰富了有机和超分子光催化剂的种类.
研究领域:
光催化
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能源材料
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超分子化学
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清洁能源
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光化学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Fuyan Kang,Cai Shi,Yeling Zhu,Malin Eqi,Junming Shi,Min Teng,Zhanhua Huang,Chuanling Si,Feng Jiang,Jinguang Hu
The global commitment to pivoting to sustainable energy and products calls for technology development to utilize solar energy for hydrogen (H 2 ) and value-added chemicals production by biomass photoreforming. Herein, a novel dual-functional marigold-like Zn x Cd 1 -x S homojunction has been the production of lactic acid with high-yield and H 2 with high-efficiency by selective glucose photoreforming. The optimized Zn 0.3 Cd 0.7 S exhibits outstanding H 2 generation (13.64 mmol h −1 g −1 ), glucose conversion (96.40%), and lactic acid yield (76.80%), over 272.80 and 19.21 times higher than that of bare ZnS (0.05 mmol h −1 g −1 ) and CdS (0.71 mmol h −1 g −1 ) in H 2 generation, respectively. The marigold-like morphology provides abundant active sites and sufficient substrates accessibility for the photocatalyst, while the specific role of the homojunction formed by hexagonal wurtzite (WZ) and cubic zinc blende (ZB) in photoreforming biomass has been demonstrated by density functional theory (DFT) calculations. Glucose is converted to lactic acid on the WZ surface of Zn 0.3 Cd 0.7 S via the photoactive species O 2 − , while the H 2 is evolved from protons (H + ) in H 2 O on the ZB surface of Zn 0.3 Cd 0.7 S. This work paves a promising road for the production of sustainable energy and products by integrating photocatalysis and biorefine.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Qi Sui,Runjie Li,Yanyan Zhang,Mengtian Huang,Ting Wang,Man Yang,Miao Cao,Xiaoping Hong,Benxia Li
Accelerating the charge transfer (CT) capability of photocatalysts is an efficient way to improve the overall photocatalytic performance, yet the precise regulation of CT in photocatalyst systems is still lacking. In this paper, a series of hybrid photocatalysts composed of graphitic carbon nitride ( CN ) and various viologens ( V ) were prepared for the photocatalytic hydrogen evolution (PHE) from water splitting under visible-light irradiation. Considering the fixed energy structure of CN , the different electron-withdrawing substituents were introduced to engineer the band structure of V delicately and modulate the CT process between CN and V . It was shown that all the hybrid photocatalysts CN-x%V y exhibited higher photocatalytic performance, of which CN–1%V 3 , possessing the strongest electron withdrawing group (-NO 2 ), demonstrated the best PHE performance (3572.3 μmol g −1 h −1 ), exceeding 29 times over the unmodified CN . It was proposed that the introduction of V can optimize the interfacial photogenerated electron transfer ( CN → V →Pt) of the whole photocatalytic system effectively. We highlighted the V as an efficient chemical segment to modify semiconductors toward enhanced activity due to the following unique characteristics: (i) the unique redox ability, (ii) the easy synthetic methods for controlling the band structures precisely, and (iii) the inherent positively charged feature. This work provides a deep understanding of CT for the rational design of high-performance photocatalysts through band engineering.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Gaojie Li,Kai Du,Xinxin Wang,Xiaochen Wang,Boao Chen,Chuangwen Qiu,Jiaqiang Xu
This study is attempted to improve the hydrogen sensing performance of SnO 2 based sensors by simultaneously employing two strategies of morphology control and noble metal loading. Therefore, SnO 2 ultrathin nanosheets with thickness not exceeding 3.5 nm were successfully synthesized by a hydrothermal method and then different content of Pd nanoparticles were uniformly loaded onto SnO 2 surface by in situ reduction with ascorbic acid . The gas sensing properties demonstrated that the introduction of Pd not only altered the selectivity of the SnO 2 sensor from ethanol to hydrogen, but also significantly improved the gas sensitivity and reduced the working temperature. And the optimal 1.0%Pd/SnO 2 sensor owned the highest sensitivity (75), fastest response-recovery property (21 s/13 s) to 20 ppm of hydrogen at 220 °C, and the actual detection limit is as low as 0.1 ppm. Furthermore, 1.0%Pd/SnO 2 sensor exhibited excellent repeatability, reproducibility and acceptable anti-interference of humidity. The DFT studies suggest that the physisorption of the hydrogen molecules on the surface of SnO 2 , but chemisorption on the surface of Pd/SnO 2 . The improved H 2 sensing performance of Pd/SnO 2 sensor attributes its ultrathin thickness of SnO 2 and catalytic dissociation of Pd to O 2 and H 2 .
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Fuhua Xu,Yanlan Wang,Changlong Wang,Wenkai Huang,Xiang Liu
In despite of significant progresses have been accomplished in the programming and development of updated and efficient nana-catalysts for H 2 production from a wide variety of chemical hydrogen storage materials. However, it is a practical matter of the utmost importance to develop the “on-off” control for on demand H 2 release in the cause of effectively and safely producing, carrying and depositing H 2 gas. Herein, we have first designed and synthesized a sequence of carbon nanosphere (CNS)-stabilized bimetallic PtNi nanoparticles (PtNi/CNS), by stabilization of nearly monodispersed PtNi bimetallic nanoparticles onto the surface of carbon nanosphere, for the highly selective and efficient on-demand H 2 release upon the dehydrogenation of hydrous hydrazine. Then, the optional nanocatalyst Pt 1 Ni 1 /CNS exhibits the highest catalytic performance in hydrogen production from dehydrogenation of hydrous hydrazine, with 100 % H 2 selectivity and the turnover frequency (TOF) of 3928 mol (H 2 )·mol cat −1 ·h −1 at 50 °C. The detailed physical characterizations have confirmed that the superior catalytic performance of Pt 1 Ni 1 /CNS in the H 2 release upon hydrous hydrazine dehydrogenation is attributed to the electronic interaction and synergistic effect between Ni and Pt. More importantly, the highly selective “on-off” control for demand-based H 2 release upon the dehydrogenation of hydrous hydrazine is successfully realized by pH regulation.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Zicheng He,Yunjie Lin,Mingfu Ye,Wenqing Zhu,Guochang Chen
The bismuth-containing semiconductors have emerged as promising materials for the degradation of organic pollutants and reduction of CO 2 . However, their potential applications in photocatalytic H 2 generation have not been explored clearly. Herein, bismuth-containing multicomponent photocatalyst Ag-BWV-y (where y represents the moles of Ag + in the initial reaction system) has been synthesized by a simple one-pot chemical method for photocatalytic H 2 generation. The element Ag is homogeneously distributed in as-prepared nanocomposite, and the band structure of Ag-BWV-y can be tuned by the dosage of Ag + ions. The optimized photocatalyst Ag-BWV-y (y = 0.15) shows a maximum H 2 evolution rate of 652 μmol h −1 g −1 , which is about 5.6-fold that of undoped sample. The narrow band gap of Ag-BVW-0.15 favors the photocatalytic activity in promoting H 2 production.
✓ 已验证
产品关联
DOI
高影响因子
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