INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Jiming Zeng,Hanyu Shi,Qian Wang,Chengchen Wang,Yukun Wang,YaXin Zhou,Guobin Yang,Jun Li,Giuseppe Mele,Chen Wang
Photocatalytic water splitting for hydrogen production and the degradation of organic pollutants are regarded as promising strategies to address the current energy crisis and environmental issues. As a wide-bandgap metal oxide, TiO 2 is characterized by low catalytic activity and a narrow range of light absorption when used alone, whereas its combination with narrow-bandgap semiconductors has been shown to lead to a significant enhancement in catalytic performance. In this study, CdS–TiO 2 composites were synthesized via a ball-milling method, after which Pt–Pd nanoparticles were deposited by photodeposition. The noble metals were found to interact with CdS and TiO 2 respectively, while a synergistic catalytic effect between Pd and Pt was also observed. The photocatalytic efficiency was further extended by the formation of CdS–TiO 2 heterojunctions, resulting in a significantly enhanced hydrogen production rate of 4656.99 μmol h −1 g cat −1 in the ternary system. Moreover, the composite demonstrated significantly enhanced performance in the photocatalytic reduction of 4-NP, The Pt–Pd NPs/CdS-Vo-TiO 2 photocatalyst achieved a 95.2 % conversion rate for 4-NP within 2 min, also demonstrating high photocatalytic activity.
研究领域:
材料化学
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光催化
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纳米催化
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能源材料
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环境催化
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半导体异质结
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清洁能源转化
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 8.3
Minghua He,Tingting Zhou,Wenbing Meng,Linrui Zhang
The design and development of cost-effective and highly efficient bifunctional oxygen electrocatalysts hold great significance in the study of metal-air batteries. Herein, the present study describes a facile and scalable strategy for the synthesis of a complex comprising nanorod-like MnO 2 -V O integrated with MWCNTs. For electrochemical performance, MnO 2 -V O /MWCNTs exhibit excellent oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalytic activities, demonstrating a half-wave potential ( E 1/2 ) of 0.79 V for ORR and a potential of 1.62 V at 10 mA cm −2 for OER, with a low bifunctional potential difference ( ΔE OER-ORR , between the ORR half-wave potential and the OER potential at 10 mA cm −2 ) of 0.83 V, which are comparable to those of Pt/C and RuO 2 . This excellent catalytic performance can be attributed to the rational design of the MnO 2 -V O components and the unique interwoven network of the MnO 2 -V O /MWCNTs complexes. In addition, the electrocatalytic action and stability improvement mechanisms were also systematically analyzed based on microstructural characterization and electrochemical response. Finally, a zinc-air battery (ZAB) was fabricated by employing the as-synthesized MnO 2 -V O /MWCNTs as the cathode catalyst. The MnO 2 -V O /MWCNTs-based ZAB demonstrates an open-circuit voltage of 1.48 V, a power density of 71.17 mW cm −2 , and superior charge-discharge cycling stability with a voltage gap of only 0.77 V after 100 cycles, which are comparable to those of the commercial Pt/C + RuO 2 -based ZAB (1.39 V, 74.84 mW cm −2 , and 0.87 V gap). This study provides a simple, inexpensive and accessible synthetic method for the design of high-performance non-precious metal-based ORR/OER bifunctional electrocatalysts.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
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IF 13.2
Yandong Ma,Qiulin Li,Liang Wang,Weinan Cao,Shu-juan Bao,Muhammad Kashif Aslam,Tong Xue,Maowen Xu
Ionic pre-insertion is considered to be an effective method of modulating the interlayer structure of vanadium oxides, allowing for greater interlayer spacing and more active site exposure. However, the pre-inserted ions inevitably compete with the V atoms for the O atoms, leading to irreversible stretching distortion of the V O bond and thus reducing the stability of vanadium oxides. Herein, we inhibit the competitive displacement of oxygen atoms in vanadium oxides due to pre-inserted NH 4 + ions by utilizing Na + instead, and thus the obtained NaNHVO demonstrated impressive cycling stability (capacity retention of 86 % for 10,000 cycles at 10 A g −1 ), fast ion inserted/de-inserted kinetics, and highly competitive specific discharge capacity (465.6 mAh g −1 at 0.1 A g −1 ). The variation of the V O bond lengths of NaNHVO and its unique ion transport pathway are verified by a combination of DFT calculations and experiments. In addition, the electrochemical energy storage mechanism of Zn 2+ /H + co-storage of NaNHVO is determined by tracking the changes in the electrode structure at different charging-discharging stages. This work provides new insightful ideas for improving the ion pre-insertion method and thus designing rational layered vanadium oxide electrode materials.
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CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Yunning Chen,Renquan Guan,Xueying Cheng,Jie Zhao,Zhengkai Wu,Yan Wang,Qingkun Shang,Yingnan Sun
In this paper, two surface oxygen vacancy-rich TiO 2 composite photocatalysts were successfully constructed by solid thermal reduction ((R-Vo)TiO 2 ) and bimetallic doping (Nd-Fe-(D-Vo)TiO 2 ). The oxygen vacancies were characterized in detail using XPS, Raman, EPR and STEM. The results show that the excellent photocatalytic performance of Nd-Fe-(D-Vo)TiO 2 deriving from its doping energy and surface oxygen vacancies. Nd-Fe-(D-Vo)TiO 2 could degrade 58 % of phenol within 120 min, which was much greater than 15 % of TiO 2 and 27 % of (R-Vo)TiO 2 . Three composite photocatalysts, TiO 2 @EA, (R-Vo)TiO 2 @EA and Nd-Fe-(D-Vo) TiO 2 @EA, with better visible light absorption and photocatalytic performance were further obtained by bonding ellagic acid (EA) to the surface of TiO 2 . Nd-Fe-(D-Vo)TiO 2 @EA could almost completely degrade ethinyl estradiol within 20 min with a high minimization degree of 84 %. The possible sites of ethinyl estradiol attacked by free radicals were predicted by theoretical calculation combining with high-resolution mass spectrometry analysis, and the possible degradation mechanism was proposed.
研究领域:
环境科学
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材料科学
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化学工程
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光化学
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2022
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IF 10.753
Yiwen Chen,Junguo He,Heliang Pang,Peigen Jiang,Fangshu Qu,Dehai Yu,Jie Zhang
A novel self-organized nanoporous V O -Co 3 O 4 /Co cathode was prepared via anodization and plasma treatment and obtained a significant nitrate reduction efficiency. In the anodization, an oxide layer with the nano-sized pore structure initially grew in-situ on the Co substrate and showed a better surface area. Subsequently, He-plasma increased surface oxygen vacancies (V O ) from 24 % to 57 %. Electrons in vacancies were charged into empty e g orbital of low-spin Co 3+ (O h , octahedral) and firstly generated high-spin Co 2+ (O h ) with the configuration of t 2g 6 e g 1 , accounting for 71.7 % of cobalt species. Accordingly, two original mechanisms (Vo-catalyzed and Co 2+ (O h )-catalyzed) were concluded in this study. Oxygen vacancies increased the charge intensity and served as absorption sites in nitrate reduction. Meanwhile, massive Co 2+ (O h ) provided electrons in the e g orbital with a higher energy state and mediated the faster electron transfer through a Co 2+ –Co 3+ –Co 2+ redox cycle, compared with Co 2+ (T d , tetrahedral). Ultimately, a faster reaction kinetic of 0.0220 min −1 was achieved by V O -Co 3 O 4 than other cathodes e.g., Co 3 O 4 (0.0150 min −1 ). Such V O -Co 3 O 4 /Co cathode-based denitrification strategy displayed great advantages in engineering application and completely removed 90 % of TN from actual wastewater.
研究领域:
环境科学
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电化学工程
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材料科学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Jingwen Ma,Ruiting Wang,Jinhao Liu,Ying Tian,Junbin Li
Electrocatalytic nitrate-to-ammonia reduction (NO 3 RR) offers a sustainable alternative to fossil-fuel-dependent Haber-Bosch processes. However, limited NH 3 yield and unsatisfactory faradaic efficiency hindered the development of NO 3 RR. Herein, a unique Ru/V o -NiCo 2 O 4 heterostructure is reported as an effective NO 3 RR catalyst, in which the NiCo 2 O 4 site preferentially adsorbs nitrate, while the Ru site provides active H species for the subsequent reduction process. Structural characterization reveals that enrichment of ruthenium on the surface of nickel-cobalt oxide catalysts by electrochemical deposition not only promotes the generation of abundant oxygen vacancies, but also promotes the charge redistribution and the formation of built-in electric field inside the catalysts, which improves the electrical conductivity as well as promotes the generation of a large number of active sites in the NO 3 RR and EGOR processes. Ru/V o -NiCo 2 O 4 exhibits excellent bifunctional catalytic activity for NO 3 RR and ethylene glycol oxidation reaction (EGOR). Specifically, in the electrocatalytic nitrate reduction for ammonia production, the Faraday efficiency reached up to 95.14 % with an ammonia yield of 17.20 mg h −1 cm −2 at - 0.3 V. The catalyst also performed well for the oxidation of ethylene glycol, with a voltage of only 0.469 V required to achieve a current density of 50 mA cm −2 . After continuous electrolysis for 12 h at a current density of 100 mA cm −2 , the formate Faraday efficiency reaches as high as 88 %. Moreover, utilization EGOR instead of OER to form NO 3 RR||EGOR full cell not only realize energy-saving NH 3 production, meanwhile achieving value-added formate product. For the constructed NO₃RR||EGOR full cell, its formate Faraday efficiency reaches up to 94 % after continuous electrolysis for 12 h at a current density of 100 mA cm −2 . This work provides a strategy to achieve highly efficient, energy-saving ammonia synthesis via rational design of bifunctional electrocatalysts and construction of a co-electrolysis system, which carries substantial significance for both energy and environmental sectors.
研究领域:
电化学
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环境催化
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能源材料
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纳米催化
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可持续化学
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DOI
高影响因子
Green Energy & Environment
·
2026
·
IF 16.7
Jingyue Hu,Yuanting Wu,Ruihua Gao,Lihui Guo,Guanjun Chen,Hulin Liu,Ou Hai,Xinmeng Zhang,Yunlong Xue,Yongqiang Feng
Synergistically coupling complementary vacancy pairs with an ultrathin framework provides a promising yet underexplored route to robust photocatalysts for water purification. Herein, we report the synthesis of ultrathin SBBC (Bi 12 SiO 20 -Bi 2 O 3 -BiOCl-Bi 2 SiO 5 )/g-C 3 N 4 (CN) nanosheets (SBCN-6) in which surface [Bi 2+ –V O ] defect centers are deliberately paired with nitrogen vacancies (V N ), thereby uniting dual-defect chemistry with an ultrathin framework. Electron-sequestering [Bi 2+ –V O ] clusters introduce deep trap states, which robustly capture photoexcited electrons generated in SBBC. V N sites in CN serve as efficient electron-trapping centers that significantly suppress internal electron-hole recombination within CN, and this combined action accelerates visible-light redox reactions. This synergistic dual-defect network, comprising [Bi 2+ –V O ] in SBBC and V N sites in CN, significantly enhances charge separation. Density Functional Theory (DFT) and X-ray Photoelectron Spectroscopy (XPS) unveil a type-Z/type-II hybrid transfer cascade: SBBC (V B ) → [Bi 2+ –V O ] → SBBC (C B ) → CN (C B ) ← [V N ] ← CN (V B ). Under visible-light irradiation, the photocatalyst exhibits exceptional activity in degrading refractory antibiotics, achieving a high apparent rate constant (k) of 0.129 min -1 for tetracycline (93% degradation in 120 min) and removing 91% of ciprofloxacin in 120 min. Moreover, it rapidly degrades the Rhodamine B dye, with over 99% removal within just 30 min. It also retains excellent recyclability over multiple cycles and outperforms most reported Bi-based photocatalysts. Coupling dual-defect engineering with morphology control, this study advances the mechanistic exploration of defect-mediated catalysis and furnishes a valuable reference for constructing visible-light photocatalysts that simultaneously degrade dyes and antibiotics.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Jingdong Guo,Weibing Ma,Zhiyuan Sang,Xueqi Zhang,Ji Liang,Feng Hou,Wenping Si,Song Wang,De'an Yang
Aqueous zinc‐ion batteries (ZIBs) have become a promising alternative to lithium-ion batteries (LIBs) for grid‐scale energy storage. However, the bivalent nature and large radius of zinc hydrated ions commonly lead to a strong electrostatic interaction with the host lattice and a huge strain feature during zinc-ion insertion, which results in slow diffusion kinetics and poor cycling stability. Herein, a lattice-water-rich V-based polyanionic cathode, named Mn 0.25 (VO) 0.75 PO 4 ·2.25H 2 O (MnVP), is mass-producible and in which the sufficient lattice water weakens the electrostatic interactions and facilitates the rapid Zn 2+ migration kinetics. The introduced Mn 3+ ions partially replaced the V elements, which made the crystal structure more stable during the cycle. Besides, the doping of inactive Mn 3+ can introduce the crystal water, which lower the stress and strain of the host lattice during zinc-ion insertion. Thus, the MnVP cathode delivers a high specific capacity (207.7 mAh g −1 at 0.1 A g −1 ), excellent rate capability (93.5% retention at 5 A g −1 ) and long cycle durability (after 700 cycles with a capacity retention of 88.4 %). Furthermore, the simple preparation and low cost make this cathode expect to be used in large‐scale energy storage systems.
研究领域:
材料科学
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电化学
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高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 37
·6492-6497
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IF 3.756
Xinmei Wang,Lu Qi,Lei Wu,Ruixin Zhang,Maierhaba Abudoureheman,Jiarong Lv,Peng Wang,Xiaoyu Dong,Qun Jing,Zhaohui Chen
Three non-centrosymmetric (NCS) alkaline earth vanadyl(IV) phosphate hydrates, M(VO)2(PO4)2·4H2O (M = Ca, Sr, Ba) 1–3, have been successfully synthesized by a mild hydrothermal technique. The birefringence of 1–3 was calculated to be 0.093@1064 nm, 0.070@1064 nm and 0.133@1064 nm by first principles calculations, respectively. The large birefringence mainly comes from the perfect parallel arrangement of 2[V2P2O14]∞ layers and the force of hydrogen bonds, which is conducive for the enhancement of polarization anisotropy. Furthermore, we also studied other optical and thermal properties for the title compounds as well as the relationship between structures and properties. The results provide a new perspective for exploring nonlinear optical (NLO) materials with large birefringence in vanadyl phosphate hydrates.
研究领域:
材料科学
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光学
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DOI
高影响因子
Journal of Energy Storage
·
2025
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IF 9.8
Qianqian Zhang,Yaru Zhu,Min Yang,Yanru Zhang,Jialin Wang,Shanshan Liu,Ye Liu,Xin Yang,Kai Feng,Wenzuo Li
Aqueous zinc-ion batteries (AZIBs) have good application prospects in the field of large-scale energy storage. The design and synthesis of high-performance cathode materials are key to promoting the development and application of AZIBs. In this work, the combination of redox active V 4+ cation and HPO 3 2− anion provides excellent zinc-ion (de)intercalation ability. In addition, HPO 3 2− and C 2 O 4 2− anion groups collaborate to construct a stable framework with multi-dimensional zinc-ion transport channels, providing fast and robust pathway for zinc-ion transport. Carbon composites further improve electronic conductivity, shorten ion transport distance, and increase the electrochemical reaction area of Na 2 [(VO) 2 (HPO 3 ) 2 (C 2 O 4 )]·2H 2 O@C (NVPCO@C) cathode material. As a result, NVPCO@C cathode material delivers a high specific capacity over 180 mAh·g −1 at a current density of 40 mA·g −1 . Moreover, NVPCO@30%C cathode material maintains 100 % capacity after 100 cycles. Ex-situ X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectra confirm the electrochemical activity of V 4+ /HPO 3 2− ions and reveal the zinc-ion storage mechanism.
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高影响因子
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