JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yijing Xia,Jingsong Dai,Yifei Peng,Yuqi Guan,Yangcheng Ding,Huajun Feng
This study aims to design a porous Janus polyacrylonitrile-based carbon fiber (PCF) electrode with asymmetric interfacial wettability for the simultaneous management on oxygen diffusion and ion transfer for H 2 O 2 electro-generation. The wetting state of PCF electrode is adjusted by the facile deposition of polytetrafluoroethylene (PTFE) via capillarity. In contrast to single aerophobic and aerophilic electrodes, the Janus PCF electrodes provide a stable gas film for promoting oxygen transfer while ensuring rapid ion migration and release. Compared to the other Janus electrodes, the porous PCF electrode subjected to three cycles of PTFE modification (named Janus-3) exhibit richer functional groups that improves two-electron oxygen reduction reaction (2e − -ORR) performance with reduced onset potential and higher current increase rate. And the excellent characteristics of Janus-3 contribute to the highest H 2 O 2 production rate of 10.61 ± 0.13 mg h −1 cm −2 in a flow-through electrochemical system, along with the highest current efficiency (CE) and oxygen utilization efficiency (OUE) values of 83.63 ± 1.01 % and 81.22 ± 4.13 %, respectively. The oxygen mass transfer and ion transport mechanism of H 2 O 2 electro-generation are revealed. Lastly, long-lasting operation stability of Janus-3 and its high H 2 O 2 production, CE, and OUE suggest great potential to replace normal gas diffusion electrodes for H 2 O 2 electro-generation.
研究领域:
材料科学
·
电化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jing Zhang,Miaoqi Liu,Bo Pang,Chun Liu,Junjun Ma,Jianrui Niu,Ruina Zhang
Microbubble ozonation combined with electro-generated H 2 O 2 process ( E H 2 O 2 -MB-O 3 ) was applied to degrade ciprofloxacin (CIP) as a typical antibiotic in wastewater in this study. The results showed that the performance of CIP degradation and mineralization in E H 2 O 2 -MB-O 3 process was more efficient than other related processes. Microbubble ozonation and electro-generated H 2 O 2 showed obvious synergistic effect on enhanced CIP removal in E H 2 O 2 -MB-O 3 process. The O 3 dosage, applied current and initial pH in E H 2 O 2 -MB-O 3 process were optimized as 12.5 mg/min, 50 mA and 7.0 (uncontrolled). Under the optimal conditions, CIP could be degraded completely within 60 min and the TOC removal efficiency of 28.85% could be achieved within 90 min in E H 2 O 2 -MB-O 3 process. The corresponding ozone utilization efficiency was close to 100%. More efficient ROS generation was observed in E H 2 O 2 -MB-O 3 process, especially •OH, compared with other related processes. The contribution rates of •OH, 1 O 2 , O 3 and O 2 .- to CIP removal were determined as 66.79%, 23.57%, 6.67% and 2.98% in E H 2 O 2 -MB-O 3 process, respectively. The electro-generated H 2 O 2 was clarified to contribute to not CIP removal but ROS generation. Three CIP degradation pathways were proposed according to identified degradation intermediates, which indicated that pyridone structure of quinoline and piperazine ring in CIP molecule could be destroyed more easily than benzene ring of quinoline, and the hydroxylation seemed to prevail in these CIP degradation pathways due to •OH electrophilic addition reaction probably. The removal of other antibiotics in E H 2 O 2 -MB-O 3 process also depended on not ozone direct oxidation but •OH oxidation mainly.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2023
·
IF 17.6
Shuaibing Wang,Dong Zhang,Jiahui Zhou,Xiaomin He,Si Yu Zheng,Jintao Yang
Moisture-sensitive gels with recyclable and switchable mechanics hold great promise for electronic generation. However, the volume, mechanical, electrical stability of gels during repeated hydration-dehydration remain a big challenge. In this study, we have developed a high-strength ionogel by incorporating a polyacrylic acid (PAA) network with multiple hydrogen bonds into the polyzwitterion-ionic liquid (PVBIPS-VEIMBF 4 ) network. The resulting ionogel exhibits an exceptional breaking strength of 67 MPa and significant water-induced softening (2600-fold modulus decrease) with the elongation of approximately 708%. Moreover, it remains stable over 7 rehydration processes without volume deformation, simultaneously exhibits excellent water/heat induced shape memory behavior. Additionally, due to the protonation ability of polyelectrolytes and the exceptional hydration ability of zwitterions, a single gel-based MEG can consistently produce a high voltage of 1.17 V at 85% outdoor humidity. With diverse applications in different states, this excellent ionogel demonstrates enormous potential for sustainable development of green materials.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Xue Xiao,Tianjiao Wang,Juan Bai,Fumin Li,Tianyi Ma,Yu Chen
Selective hydrogen peroxide (H2O2) electrogeneration by oxygen reduction reaction (ORR) is an efficient and promising synthetic method for H2O2 production. Herein, we build a particular inorganic–organic interface to enhance the electrocatalytic selectivity of reduced graphene oxide (rGO) aerogels for H2O2 electrogeneration by modifying rGO aerogels with polyethyleneimine (PEI). The three-dimensional porous structure of aerogels and the steric hindrance effect of PEI on rGO endow PEI-functionalized rGO (rGO/PEI) aerogels with enhanced selectivity (90.7%), production rate (106.4 mmol gcat–1 h–1), and durability for H2O2 electrogeneration by the two-electron pathway of ORR.
研究领域:
化学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Ren Yan,Xueliang Zhang,Hai Wang,Tikang Wang,Guozhang Ren,Qizeng Sun,Fei Liang,Yangzhi Zhu,Wei Huang,Hai-Dong Yu
Electrotherapy has shown considerable potential in treating chronic wounds, but conventional approaches relying on bulky external power supplies and mechanical force are limited in their clinical utility. This study introduces an autonomous, moisture-driven flexible electrogenerative dressing (AMFED) that overcomes these limitations. The AMFED integrates a moist-electric generator (MEG), an antibacterial hydrogel dressing, and concentric molybdenum (Mo) electrodes to provide a self-sustaining electrical supply and potent antibacterial activity against Staphylococcus aureus and Escherichia coli . The MEG harnesses chemical energy from moisture to produce a stable direct current of 0.61 V without external input, delivering this therapeutic electrical stimulation to the wound site through the Mo electrodes. The AMFED facilitates macrophage polarization toward reparative M2 phenotype and regulates inflammatory cytokines. Moreover, in vivo studies suggest that the AMFED group significantly enhances chronic wound healing, with an approximate 41% acceleration compared to the control group. Using a diabetic mouse wound model, the AMFED demonstrates its effectiveness in promoting nerve regulation, epithelial migration, and vasculogenesis. These findings present a novel and efficient platform for accelerating chronic wound healing.
研究领域:
生物医学工程
·
伤口护理
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Yan Xia,Hao Shang,Qinggang Zhang,Yuanquan Zhou,Xiaohong Hu
Hydrogen peroxide (H 2 O 2 ) is a powerful oxidant with a wide range of applications, for example, organic synthesis and wastewater treatment . The present work describes the phosphorus-doped multiwall carbon nanotubes (P-CNTs) catalyst for electrogeneration of H 2 O 2 in acidic and neutral medium using gas diffusion electrode. These P-CNTs are synthesized by a simple and efficient hydrothermal method . The structure and morphology are characterized by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) respectively. The kinetics of the oxygen reduction reaction (ORR) is evaluated by the rotating disk electrode technique. The accumulation of H 2 O 2 reaches to 1291.3 mg/L after 60 min for P-CNTs gas diffusion electrode, while the CNTs gas diffusion electrode produces 415.9 mg/L of H 2 O 2 . The current efficiency for the formation of H 2 O 2 is 88.5% when using P-CNTs gas diffusion electrode, which is higher than 64.7% of CNT gas diffusion electrode in 60 min. The operational parameters for P-CNTs gas diffusion electrode such as cathodic potential, pH and O 2 flow rate are optimized systematically. Finally the P-CNTs gas diffusion electrode is experimentally confirmed to be efficient in the degradation of 200 mg/L metronidazole (MNZ) by electro-Fenton (EF) process at both acidic and neutral pH, indicating its potential for the treatment of refractory organic pollutants wastewaters.
研究领域:
环境科学
·
材料科学
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Biao Li,Xiao-Na Liu,Chen Tang,Jun Zhou,Xia-Yuan Wu,Xin-Xin Xie,Ping Wei,Hong-Hua Jia,Xiao-Yu Yong
This study evaluated the feasibility of microbial fuel cells (MFCs) for simultaneous electricity generation and degradation of phenolic compounds. The voltage generation was inhibited by 36.18–63.90%, but the degradation rate increased by 146.15–392.31% when the initial concentration of syringic acid (SA), vanillic acid (VA), and 4-hydroxybenzoic acid (HBA) increased from 0.3 to 3.0 g/L. The collaboration among the functional microbes significantly enhanced the degradation rate of parent compounds and their intermediates in MFCs systems, while the accumulated intermediates severely inhibited their complete mineralization in fermentative systems. High-throughput sequencing showed that the growth of fermentative bacteria prevailed, but electrogenic bacteria were inhibited in the anode microbial community (AMC) under high concentrations of phenolic compounds (3.0 g/L). These findings provide a better understanding of the dynamic shift and synergy effects of the AMC to evaluate its potential for the treatment of phenolic-containing wastewater.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Meng Li,Shaoqi Zhou
Microbial fuel cell (MFC) as a promising technology, which can be used to remove pollutant and generate bioelectricity simultaneously. In this study, the carbon cloth modified with α-Fe 2 O 3 /polyaniline nanocomposites is used as cathode in a dual chamber MFC for the generation of bioelectricity and electrochemical reduction of hexavalent chromium (Cr(VI)). The carbon cloth decorated with nanocomposites is prepared by a facile electrochemical polymerization technique. The MFC exhibits a complete Cr(VI) reduction at 50 mg·L −1 within 36 h, acquiring the obviously high Cr(VI) reduction rate of 1.39 g·m −3 ·h −1 , and the reduction rate is 1.67 times as high as that of the MFC-Blank (0.83 g·m −3 ·h −1 ). The MFC with α-Fe 2 O 3 /polyaniline nanocomposites cathode improves the Cr(VI) reduction rate and output power in MFC. And the maximum power density of this MFC is 1502.78 mW·m −2 , which is 1.753 times as high as that of the blank cathode. The improvement is due to the strong conductivity, high mobility of charge carriers and excellent electrochemical performance of nanocomposites. Besides, the power density of MFC modified with α-Fe 2 O 3 /polyaniline cathode has merely a slight decrease (2.23%) during fifty cycle operation due to the formation of protection layer. Consequently, the carbon cloth attached with α-Fe 2 O 3 /polyaniline nanocomposites with excellent electrochemical performance can be used as a promising cathode for Cr(VI) reduction and bioelectricity generation simultaneously.
研究领域:
环境科学
·
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Chun-Yan Liu,Yun Chen,Jun Hu
The identification of the electrogenerated reactive intermediates is essential for an in-depth understanding of the electroredox processes. Although various short-lived intermediates are well characterized by coupling electrochemistry with mass spectrometry (EC/MS), many electrogenerated transient species (τ < 1 μs) are still rarely captured by the currently available EC/MS approaches. Here, we present a low-delay coupling device, which was constructed by decorating a microelectrode into the front tip of a microsized ion emitter. For the first time, the in situ detection of a previously hidden intermediate, i.e., the transient nitrenium ion of carbazole (τ = 333 ns), was achieved. The electrochemical generation of indole nitrenium ion, whose half-life is estimated to be shorter compared to the carbazole nitrenium ion due to less resonance stabilization, was also confirmed by direct observation. This clog-free microelectrode/ion emitter is cheap and easy to fabricate and offers a general and powerful approach to monitoring the fast reactions of electrogenerated reactive intermediates. We believe that our integrated EC/MS approach holds substantial potential for broad applicability, particularly in probing the intricate and ultrafast electroredox processes occurring at the electrode–solution interface.
研究领域:
分析化学
·
电化学
·
质谱学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuan Chang,Xiaojuan Niu,Zhengjun Bi,Haorong Li,Wenpeng Hong,Haoran Li
Solar-driven synergistic freshwater and electricity production presents a promising solution to address global water-energy challenges. However, existing systems suffer from limited condensation surface area and long vapor transport paths, which easily lead to vapor accumulation at the evaporation interface and consequently a decrease in evaporation rate. This study develops an integrated thermoelectric-interface evaporation system featuring vapor gradient regulation through enhanced condensation. It lies in a hierarchical condensation architecture with arrayed structures that triple the effective surface area, creating abundant nucleation sites for accelerated vapor phase transition. This structural design effectively reduces the interface vapor saturation and maintains high evaporation flux through dynamic vapor pressure regulation. Under 1 sun irradiation, the system achieves concurrent water production (0.48 kg m −2 h −1 ) and electricity generation (168.15 mV open-circuit voltage). With optical concentration via a Fresnel lens, these performance metrics are further elevated to 0.72 kg m −2 h −1 and 280 mV. Importantly, the device operates stably with various feedwaters, and its practical value is demonstrated by continuously powering mobile communication equipment. This condensation-mediated vapor regulation strategy establishes a new paradigm for high-efficiency synergetic water-electricity generation, particularly for decentralized applications in resource-limited regions.
研究领域:
能源材料
·
环境工程
·
热力学与传质
·
可再生能源
·
界面科学
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Science
·
2022
·Vol. 15
·期 12
·5159-5167
·
IF 39.714
Jia Meng,Chongxiang Pan,Longwei Li,Zi Hao Guo,Fan Xu,Luyao Jia,Zhong Lin Wang,Xiong Pu
The tribovoltaic effect at dynamic semiconductor interfaces has been an emerging hot topic due to its potential impact in energy harvesting and smart electronics. Previously, this effect was mainly studied based on the sliding mode and is undesirably accompanied by abrasion issues. Herein, we demonstrate the tribovoltaic effect based on the contact-separation motion of a dynamic Schottky interface, and achieve durable, flexible and high-performance direct-current electricity generation. The generator is designed based on a flexible organic semiconductor, achieving a high current density of 16.00 A m−2, a charge density of 98.72 mC m−2, and a peak power density of up to 5.40 W m−2 in contact-separation mode. Most importantly, long-term durability is demonstrated without performance degradation in 20 000 cycles, as the undesirable abrasion in the sliding mode is avoided. Furthermore, investigation of the tribovoltaic effect in contact-separation mode helps achieve better mechanistic understanding, that the contact-induced “bindington” is more likely to provide the energy for electron excitation. Therefore, this study presents both practical and fundamental insights for tribovoltaic devices.
研究领域:
能量收集
·
智能电子
·
材料科学
·
半导体物理
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Dongxiu Lu,Ruhui Ma,Yuan Chen,Yuancai Chen
In this study, Ni-doped Ti/SnO 2 -Sb anode (Ti/NATO) was prepared and used for electrocatalytic ozone production and in-situ activated peroxymonosulfate (E-Ti/NATO-PMS) to degrade bisphenol A (BPA). SEM, XRD and XPS results indicated that Ni doping could influence the transformations of Sb 5+ and Sb 3+ ions, which decreased the agglomeration of crystallites and increased the O ads and oxygen vacancy (O v ) concentrations. Ti/NATO 1.0 anodes significantly improved the ozone production via outcompeting of the adsorbed O 2ads over water, and inhibiting the desorption of O 2ads , to obtain the highest O 3 concentration with low onset potential and high oxygen evolution potential. E-Ti/NATO 1.0 -PMS system obtained over 92% BPA degradation within 60 min at 10 mA cm −2 and pH ranging from 4 to 10. Radical scavenging experiments revealed that O 3 in situ generated could directly electro-activate PMS into •O 2 − and 1 O 2 . The E-Ti/NATO 1.0 -PMS process could detoxify the BPA through chain scission, rearrangement and ring opening processes, and exhibited great potentials for application.
研究领域:
环境科学
·
化学工程
·
水处理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）