APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Suhong Lu,Chengyu Xu,Shuo Wang,Yewei Chen,Zhongtao Jiang,Xinru Chen,Jurong Liu,Yuzhen Fang,Guilong Liu
Engineering oxygen vacancies in α-MnO 2 represents an effective strategy for generating active oxygen species to enhance catalytic performance in HCHO oxidation. In this study, rod-like α-MnO 2 was synthesized via an in situ redox reaction between potassium permanganate (KMnO 4 ) and methanol, followed by modulation of surface oxygen vacancies through the adjustment of H 2 O 2 etching time. Etching duration critically governed catalytic enhancement, with α-MnO 2 -E-2 (2 h etching) exhibiting exceptional activity, robust stability and complete HCHO conversion at 60 °C. Characterization revealed oxygen vacancies on the catalyst surface could be effectively regulated by modifying the H 2 O 2 etching time. Significantly, α-MnO 2 -E-2 demonstrated the highest (Mn 2+ + Mn 3+ )/Mn total ratio and lowest average oxidation state (AOS), directly correlating with maximized oxygen vacancy formation. The introduction of oxygen vacancies facilitated superior oxygen mobility and activation, thereby accelerating HCHO oxidation. In situ DRIFTS analysis further confirmed that only formate species were observed as intermediates on α-MnO 2 -E-2, demonstrating that H 2 O 2 etching simplified the reaction pathway to HCHO → HCOO − → H 2 O + CO 2 .
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高影响因子
SURFACE REVIEW AND LETTERS
·
2016
·
IF 0.435
YUHUA YAN,ZHONGHUI ZHANG,MINGSHU XIAO,HUALAN ZHOU
A method was developed to conveniently and rapidly determine hydrogen peroxide (H 2 O 2 ) in food. The glassy carbon electrode (GCE) modified with agmatine sulfate (AS) easily anchoring nickel ion was attached to AS with polyamine structure. As a result, more Ni 2 + was obtained and transformed to Ni(OH) 2 /NiOOH on the AS–GCE, which caused the electrode to own much better electrocatalytic performance on H 2 O 2 . Based on these, the content of H 2 O 2 in thin sheet of bean curd sample was detected with standard addition method, by which good results were obtained.
研究领域:
分析化学
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食品科学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
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IF 9.794
Wenbo Sui,Wangzu Li,Zhongshuo Zhang,Weixing Wu,Zhanyou Xu,Ying Wang
Electrochemical synthesis of hydrogen peroxide (H 2 O 2 ) through 2-electron oxygen reduction reaction (ORR) is a sustainable alternative to the industrialized anthraquinone oxidation process . Gas-diffusion electrode (GDE) is employed to overcome the mass transport limitation of O 2 to deliver high current density . However, long-term stability in practical electrolyzer with GDE is still challenging due to electrode flooding. Here, we propose a double catalyst layer (CL) strategy with gradient Nafion distribution to balance the mass transport of O 2 and H + and improve the flood-proof ability. Our design achieved H 2 O 2 production rate up to 2.16 mmol h −1 cm −2 with a selectivity of about 90% and enabled 48 h stable electrolysis at 100 mA cm −2 . Compared to the state-of-the-art H 2 O 2 electrosynthesis system in acidic media, the full-cell voltage improved significantly to 2.3 V at 100 mA cm −2 , indicating its potential for practical production and utilization.
研究领域:
化学工程
·
材料科学
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高影响因子
JOURNAL OF CATALYSIS
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2025
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IF 6.5
Shiqi Chen,Xinyu Wang,Can Liu,Jiapeng Yue,Zhiwei Yang,Qian Ye,Hao Xu,Yujian Zhang,Xinyi Xing,Jing Zhang
Rational design and controllable synthesis of oxygen functional groups on carbon/metal catalysts surface as the effective means to enhance catalytic performance, however, still remains a great challenge. Herein, to obtain the relationship between oxygen functional groups and catalytic performance, taking MoO 2 -C as an object, the correlation between the C=O, C-O, Mo O bonds and strengthened iron reduction is quantitatively assessed, with electrochemical experiments validating that this relationship arises from its influence on the electron transport process, specifically concerning the roles of electron donors and mediators. The metal–oxygen and C-O bonds synergistically enhance electron transport, whereas the C=O and C-O bonds exhibit an antagonistic effect on electron-mediated processes. The influence of the metal–oxygen bonds was found to stem from their role as an electron donor, while the carbon–oxygen bonds primarily modulate the material’s catalytic properties by altering its electron transfer characteristics. In this study, the C-O, C=O bonds, and metal–oxygen bonds, as the typical surface oxygen functional groups, were identified the mechanism by changing the electron supply and mediation to enhance the Fe 3+ reduction reaction in the Fenton system, which provided theoretical support and design ideas for the design of catalyst with excellent catalytic properties.
研究领域:
催化
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表面化学
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电化学
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环境科学
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材料科学
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Xinyu Han,Qiyuan Huang,Zhaolian Zhu,Muyao Li,Yuping Dai,Xuefei Gao,Yan Gao
Hydrogen peroxide (H 2 O 2 ) in situ production via 2-electron oxygen reduction reaction (ORR) exhibits several advantageous characteristics, including safety, convenience, environmental friendliness, and the potential to replace the traditional anthraquinone process. Nevertheless, ORR occurs at the gas–liquid-solid interface, where O 2 diffusion to the electrode and H 2 O 2 transfer from the electrode to the solution are easily limited by the pore structure of the electrode, thus reducing the efficiency of H 2 O 2 electrosynthesis. Herein, the graphite/PTFE electrodes with different pore structures were prepared using a salt template to improve the gas permeability and promote mass diffusion. A series of characterization methods, including SEM, CV, and LSV were used to investigate the effect of inorganic pore-forming agents on the electrode pore structures and their oxygen reduction activity. The pore size distribution and gas permeability of the electrode were determined by bubble point characterization. Furthermore, the impact of inorganic salt addition, current density, pH, and aeration on H 2 O 2 electrosynthesis was examined. The results demonstrate that the graphite/PTFE electrode with 0.15 g NH 4 Cl as a pore-forming agent (0.15 g-Ele) shows an obvious micron-sized honeycomb pore structure and has the highest gas permeability, contributing to the mass transfer and 2-electron ORR to produce H 2 O 2 . At a current density of 30 mA·cm −2 , pH = 3.0, and O 2 aeration rate of 400 mL·min −1 , the H 2 O 2 production of 0.15 g-Ele is found to be 425.4 mg·L -1 ·g catalyst -1 ·h −1 , with a current efficiency of 62.9 % at 60 min. The continuous and repeated use results also indicate that maintaining an abundant micron-sized honeycomb pore of the electrode is crucial for improving the H 2 O 2 production and current efficiency in electrosynthesis.
研究领域:
电化学
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材料科学
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环境工程
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化学合成
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yong Tang,Jianhao Qiu,Dingliang Dai,Guanglu Xia,Biyao Fang,Yixin Li,Jianfeng Yao
Defect engineering is used in the development of photocatalysts and has received widespread attention for achieving efficient photocatalysis. Here, ZnIn 2 S 4 with rich sulfur vacancies (V S -ZnIn 2 S 4 ) was integrated with MIL-53-NH 2 for photocatalytic H 2 O 2 production from O 2 reduction under visible light. The sulfur vacancy could effectively promote charge separation and O 2 capture, and the heterostructure between ZnIn 2 S 4 and MIL-53-NH 2 further inhibits charge recombination, which promises highly boosted photocatalytic activities. In ambient air and pure water, V S -ZnIn 2 S 4 /MIL-53-NH 2 heterostructures exhibit superior photocatalytic H 2 O 2 production performance (705 μmol·L −1 ) relative to those of monomeric Znln 2 S 4 (78 μmol·L −1 ), V S -Znln 2 S 4 (210 μmol·L −1 ), MIL-53-NH 2 (38 μmol·L −1 ), as well as ZnIn 2 S 4 /MIL-53-NH 2 (395 μmol·L −1 ). Mechanistic studies have confirmed that the main pathway for H 2 O 2 formation on V S -ZnIn 2 S 4 /MIL-53-NH 2 is ⋅O 2 – -triggered O 2 reduction, and sulfur vacancy can adsorb and activate O 2 to facilitate the production of ⋅O 2 – . This study provides new insights into catalyst design and green synthesis of H 2 O 2 .
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Dexu Zhang,Xiaoying Peng,Jie Zhang,Shixuan Zhu,Zhihong Xue,Shubin Xiong,Shuai Xiong,Bo Sheng,Yiqiang He,Guiming Peng,Jiadong Zhang
Graphitic carbon nitride (g-C 3 N 4 ) has become a favored universal photocatalyst. Despite its numerous advantages, the photocatalytic efficiency of g-C 3 N 4 is hindered by the substantial recombination of photoexcited charge carriers and holes. In this work, we demonstrate that Zn-doped tubular carbon nitride photocatalyst (Zn-tCN) can serve as highly efficient catalysts for H 2 O 2 photosynthesis. Mechanism studies confirm that the presence of Zn in g-C 3 N 4 prolongs the lifetimes of photogenerated carriers and inhibits their recombination, which triggers the reduction of O 2 to reaction intermediates ( O 2 − ), as supported by in situ electron paramagnetic resonance (EPR) spectroscopy. More importantly, sacrificial agent experiments coupled with in situ EPR results confirmed that the reaction mechanism involves a concerted two-electron transfer process. The optimal catalyst displays a H 2 O 2 productivity of 162.4μmol g –1 h −1 under visible-light irradiation without a sacrificial agent, which is 11.7 times higher than that of pristine g-C 3 N 4 (13.8μmol g –1 h −1 ). This work proposes a synthetic strategy for the preparation of high-performance Zn-doped g-C 3 N 4 , which offers insights and perspectives for developing highly active photocatalysts and deepening the understanding of photocatalytic mechanisms.
研究领域:
材料科学
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环境科学
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化学
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2025
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IF 6.2
Pei-Ru Zhou,Yu Chai,Jia-Tong Chen,Xiao-Ping Zheng,Yan-Zhen Zheng
The valorization of agricultural waste is critical for sustainable development, yet challenges persist in obtaining light-colored lignin with preserved structural integrity. In this study, an innovative one-step pretreatment strategy integrating deep eutectic solvents (DESs) with H 2 O 2 was developed to extract light-colored lignin directly from tea stem waste. The DES-H 2 O 2 system enabled the selective dissociation of lignin–carbohydrate complexes while preserving the fundamental aromatic structure of lignin. By varying the H 2 O 2 dosage, significant improvements in lignin decolorization were achieved, as evidenced by a marked reduction in the color difference relative to milled wood lignin (MWL). Comprehensive characterization using FTIR, GPC, Zeta potential, 31 P NMR, 2D-HSQC NMR, and XPS revealed that H 2 O 2 -induced oxidation not only facilitated the conversion of non-conjugated carbonyls into conjugated structures but also induced molecular depolymerization, reduced particle size and hydrogen-bond, and enhanced surface electronegativity. These modifications contributed to decreased chromophore efficiency and suppressed aggregation, ultimately yielding lignin with improved optical properties. Furthermore, incorporation of the light-colored lignin into a commercially available base cream demonstrated its potential as a sustainable UV-shielding agent, achieving a sun protection factor (SPF) exceeding 50 at optimal lignin concentrations. This work provides a promising green pathway for the high-value utilization of agricultural waste and lays the groundwork for the development of environmentally friendly, high-performance natural UV-protection products.
研究领域:
可持续化学
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绿色技术
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生物炼制
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高分子科学
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化妆品科学
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高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-12
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IF 36.3
Hu Zhen-Yu,Liu Tian,Yang Yu-Ru,An Alicia Kyoungjin,Liew Kim Meow,Li Wen-Wei
Polyvinylidene fluoride nanofibers were treated by dimethylformamide to create micropores on membrane surface.
Photocatalysts were firmly bounded by nanofibers during stretching and shrinking.
Particulate catalysts were fixed yet high exposed on the membrane surface.
Surface self-bounded photocatalytic membrane exhibited tenfold higher decontamination activity than embedded catalyst.
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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DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Lu Zhang,Jianhao Qiu,Zongpeng Zou,Shengwei Tang,Wenxiang Tang
This work demonstrates the rational design of a Z-scheme CdS/Fe-MOF heterojunction for photo-Fenton processes utilizing in situ generated H2O2 under visible light. The photocatalysts were synthesized by depositing CdS nanoparticles onto MIL-53(Fe), optimizing interfacial charge transfer and light absorption, and ensuring effective spatial segregation of photogenerated carriers, thereby maintaining robust redox potentials. The modified CdS/Fe-MOF exhibited exceptional catalytic performance, achieving 92% degradation of 40 mg·L–1 tetracycline within 15 min, surpassing pure CdS (43%) and MIL-53(Fe) (30%) by factors of 2.3 and 3.3, respectively. Mechanistic studies identified on-site H2O2 generation through two-step oxygen reduction (236 μmol·L–1) and its subsequent activation by Fe3+/Fe2+ cycling to produce ·OH as key pathways, with h+, ·O2–, 1O2, and ·OH collectively driving pollutant degradation. The prepared photocatalysts demonstrated remarkable stability (>90% efficiency after five cycles) and structural integrity, attributed to the robust heterojunction interface. This study provides deep insight into designing Z-scheme photo-Fenton catalysts and advancing sustainable wastewater treatment.
研究领域:
环境催化
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材料化学
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光化学
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环境污染治理
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纳米材料
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可持续水处理
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高影响因子
CHINESE CHEMICAL LETTERS
·
2025
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IF 8.9
Kang Liu,Ziping Wang,Yali Xie,Yongqi Wei,Wengang Liu,Ting Feng,Yong Liu,Haiguang Zhu,Xun Yuan
Solar-driven hydrogen peroxide (H₂O₂) production offers a sustainable alternative to the energy-intensive anthraquinone process, yet conventional photocatalysts suffer from poor selectivity and uncontrollable reaction pathways. Inspired by catechol oxidase enzymes, we design dopamine-grafted lipoic acid-protected gold nanoclusters (DA-LA-Au NCs) that shift photocatalytic active sites from the metal core to redox-active ligands. This ligand-centric architecture leverages dopamine’s reversible catechol/quinone interconversion to gate a biomimetic proton-coupled electron transfer (PCET) pathway, enabling exclusive 2e⁻ oxygen reduction with near-100% H₂O₂ selectivity while completely suppressing superoxide radical (·O₂⁻) generation. Transient absorption spectroscopy and molecular dynamics confirm enhanced electron transfer kinetics and O₂ enrichment at ligand sites. Encapsulation in ZIF-8 stabilizes the system, achieving a record H₂O₂ yield of 1198 μmol/L under visible light without sacrificial agents and a 0.39% solar-to-chemical conversion efficiency, surpassing most reported photocatalysts. This "ligand-as-catalyst" strategy merges enzymatic precision with nanocluster functionality for sustainable oxidant synthesis.
研究领域:
纳米技术
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光催化
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仿生工程
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材料科学
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环境化学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Zimou Liu,Kuiling Li,Lie Liu,Hang Song,Yong Zhang,Mike Tebyetekerwa,Xiwang Zhang,Ke Wang,Lili Xu,Jun Wang
Electrosynthesis of hydrogen peroxide (H 2 O 2 ) presents a sustainable alternative to the anthraquinone process, while the transition to applying this process at industrial-relevant currents remains a significant challenge. Most studies tried to solve it by catalysts modulations, whereas we found that the accessibility to the gaseous O 2 , might be the crux of this matter. Herein, we developed a series of membrane-based gas diffusion electrodes (Mem-GDEs) with varied O 2 accessibility. Their endurable currents were found to be well correlated with the O 2 mass transferability. By constructing high O 2 -accessible triphasic interfaces, Mem-GDE achieved a recorded current density , 1.4 A cm −2 , with the current efficiency higher than 80.6 %. It was also verified for the first time that the insufficient O 2 triggered a severe flooding problem and thus further deteriorate the O 2 mass transfer. This study highlights the importance of O 2 accessibility and provides new insights into triphasic interfaces construction for realizing industrial-used H 2 O 2 -generated electrodes.
研究领域:
化学工程
·
电化学
·
材料科学
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高影响因子
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