Small
·
2024
·
IF 13
Nan Wang,Tingxue Fang,Tinghui An,Yuhao Wang,Jiaqi Li,Shuming Yu,Honghai Sun,Dong Xiang,Xiangjie Bo,Kedi Cai
Li-O 2 batteries urgently needs high discharge capacity and stable cycling performance, requiring effective and reliable bifunctional catalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Herein, Hovenia acerba Lindl -like heterostructure composed of cobalt sulfide and tin dioxide supported on carbon substrate (CoS/SnO 2 @C) is prepared via CO 2 laser irradiation technology. The half-wave potential of CoS/SnO 2 @C for the ORR is 0.88 V, while the overpotential of the OER at 10 mA cm −2 is as low as 270 mV. The Li-O 2 batteries employing the bifunctional CoS/SnO 2 @C catalyst displays a high discharge specific capacity of 3332.25 mAh g −1 and long cycling life of 226 cycles. Additionally, theory calculations demonstrate that the construction of heterostructure decreases energy barrier of the rate-determining step (RDS) for both ORR and OER. Notably, SnO 2 behaves as the electronic promoter to optimize the electronic structure of heterostructure interface and triggers charge redistribution of CoS, which weakens the adsorption strength of the * O-intermediates and allows to break the linear scaling relationship, thus further enhancing the catalytic performance of CoS/SnO 2 @C. This research furnishes directions for the design of heterogeneous catalysts, highlighting its great potential for application in rechargeable Li-O 2 batteries.
研究领域:
材料科学
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电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 21
·8902-8909
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IF 3.288
Yinyi Huang,Shina Li,Chaorong Wu,Shuo Wang,Chengyan Wang,Ruixin Ma
The electron transport layer (ETL) between the perovskite material and cathode plays an important role in planar perovskite solar cells. In this study, an alkali metal salt solution was be used to modify the surface of the SnO2 electron transport layer to optimize electron transport. The I–V characteristic measurements and UV-Vis spectroscopy were used to investigate whether introducing the interface modification can increase the electron coupling and effectively extract the energy lever of electrons. The results indicated that the interfacial modification could reduce the trap density of states and increase the mobility of the SnO2 thin films. The efficient defect passivation significantly suppressed the recombination at the SnO2/perovskite interface. This method aims at passivation using simple and low-cost inorganic material poles.
研究领域:
材料科学
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光伏技术
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太阳能
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Xiaolu Fu,Yanhe Han,Han Xu,Zhimin Su,Lina Liu
A novel and efficient Ti/SnO 2 -Sb/PbO 2 -GO-Ce electrode was successfully fabricated based on the co-deposition of Ce ions and graphene oxide (GO) into β-PbO 2 crystals and used as an anode for electrocatalytic oxidation of phenol . The electrodeposition mechanism, parameter optimization, mechanism analysis, and potential degradation pathways were discussed in depth. The co-doping of GO and Ce resulted in the high directional specificity of β(301), orderly and dense grain arrangement of PbO 2 crystals. At the same time, the oxygen evolution potential, •OH generation capacity and lifetime were also improved. The effects of experimental parameters on phenol removal efficiency were evaluated, including the applied current density, electrode gap, supporting electrolyte, initial NaCl concentration, initial pH, and initial phenol concentration. Under the optimal conditions, the removal efficiency of phenol can reach 375.6 g m -2 h -1 for 20 min electrolysis, which is about 1.2 times that of the pure PbO 2 electrode. The active oxygen species (•OH, ClO - and HClO) were important attributes to the degradation of phenol. Additionally, a potential degradation pathway for phenol was proposed. After 10 successive recycles, there was no significant difference of the electro-generated •OH, cell voltage and phenol removal rate, which confirms the stability and admirable reusability of Ti/SnO 2 -Sb/PbO 2 -GO-Ce electrode.
研究领域:
电化学
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材料科学
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环境工程
·
催化
✓ 已验证
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2022
·Vol. 12
·期 20
·2200417
·
IF 29.698
Yao Dong,Wenjian Shen,Wei Dong,Cong Bai,Juan Zhao,Yecheng Zhou,Fuzhi Huang,Yi-Bing Cheng,Jie Zhong
The interfacial properties for the buried junctions of the perovskite solar cells (PSCs) play a crucial role for the further enhancement of the power conversion efficiency (PCE) and stability of devices. Delicate manipulation of the interface properties such as the defect density, energy alignment, perovskite film quality, etc., guarantees efficient extraction and transport of photogenerated carriers. Herein, chlorobenzenesulfonic potassium salts are presented as a novel multifunctional agent to modify the buried tin oxide (SnO 2 )/perovskite interface for regular PSCs. The increasing number of carbon-chlorine bonds (C Cl) in 2,4,5-trichlorobenzenesulfonic potassium (3Cl-BSAK) exhibit efficient interaction with uncoordinated Sn, effectively filling oxygen vacancies in the SnO 2 surface. Importantly, synergistic effects of the functional group-rich organic anions and the potassium ion are achieved for reduced defect density, carrier recombination, and hysteresis. A champion PCE of 24.27% and the open-circuit voltage ( V OC ) up to 1.191 V for modified devices are obtained. The unencapsulated devices maintain 80% of their initial PCE after aging at 80 °C for 800 h in the atmosphere and 95% after aging for 100 d. With 3Cl-BSAK decoration, a high efficiency semitransparent PSC with a PCE of 12.83% and an average visible light transmittance (AVT) over 27% is also obtained.
研究领域:
光伏技术
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材料科学
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能源材料
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半导体界面
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可再生能源
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2020
·
IF 3.085
Zhou Liu,Shuzhen Wu,Xiaojie Yang,Yijun Zhou,Jiaren Jin,Junmei Sun,Li Zhao,Shimin Wang
SnO 2 has attracted extensive attention in planar perovskite solar cells (PSCs) owing to its outstanding photoelectric properties and low temperature preparation. However, pinholes are easy to appear in the annealing process of SnO 2 films, which limits its application in planar PSCs. Here lists a simple and low-cost method: Urea-complexed tin oxide in deionized water can effectively control the concentration of SnO 2 . This process is conducive to forming a compact surface morphology . Meanwhile, the work explored the effect of the properties of PSCs with different thicknesses of SnO 2 layers. The system analysis showed that PSCs based on 60 nm SnO 2 layer and the methamphetamine lead iodide (MAPbI 3 ) light absorber yielded the highest power conversion efficiency (PCE) over 18%, a fill factor ( FF ) of 0.793, and good stability. Therefore, we believe our study provides an effective way for preparing electron transport layers.
研究领域:
材料科学
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可再生能源
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太阳能电池
·
光伏技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Miao Lu,Siyuan Zhang,Liang Ma,Zhongmei Song,Xiushen Ye,Huifang Zhang,Haining Liu,Zhijian Wu
The efficient removal of recalcitrant organics in high-salinity systems, specifically brine, poses a significant challenge for electrochemically advanced oxidation processes in terms of both activity and stability. Herein, a composite electrode comprising of CNT/Nafion functionalized Ti/SnO 2 -Sb/β-PbO 2 -CNT/Nafion was developed for efficient and stable removal of octadecylamine (ODA) and 4-dodecylmorpholine (DMP) in a real high-salinity environment. The degradation efficiencies of ODA and DMP on the composite electrode can reach 100 % within 60 min, respectively. The total organic carbon (TOC) removal efficiency of ODA and DMP was significantly improved to 78 % and 66 % with remarkably low energy consumption (0.414 and 1.402 kWh/g TOC), respectively. The electrochemical characterizations demonstrate that the composite electrode exhibits improved electrochemical activity (oxygen evolution potentials = 1.791 V) and electrode surface area (ECSA = 20 cm 2 ), while maintaining reduced charge transfer resistance ( R ct = 18.21 Ω/cm 2 ) and enhanced corrosion-resistant capacity (corrosion potential = 1.115 V). Based on recycling and accelerated lifespan testing, the composite electrode demonstrates exceptional stability and recyclability. Additionally revealed was the linked stability mechanism. The electrocatalytic degradation of ODA and DMP begins with the removal of amino and morpholine rings, and then the decomposition of the carbon chains. Gas chromatography-mass spectrometry (GC–MS) and theoretical calculations were used to identify intermediate products generated during the degradation of ODA and DMP, and possible degradation pathways were provided in high-salinity systems, respectively. This work offered a fresh perspective on electrocatalytic oxidation for a real high-salinity system that is more efficient and stable.
研究领域:
环境科学
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-15
·
IF 36.3
Zheng Haiying,Liu Guozhen,Dong Xinhe,Chen Feifan,Wang Chao,Yu Hongbo,Zhang Zhihua,Pan Xu
Interface modification has been demonstrated as an effective means to enhance the performance of perovskite solar cells. However, the effect depends on the anchoring mode and strength of the interfacial molecules, which determines whether long-term robust interface for carrier viaduct can be achieved under operational light illumination. Herein, we select squaric acid (SA) as the interfacial molecule between the perovskite and SnO 2 layer and propose a self-regulated bilateral anchoring strategy. The unique four-membered ring conjugated structure and dicarboxylic acid groups facilitate stable hydrogen bonds and coordination bonds at both SnO 2 /SA and SA/PbI 2 interfaces. The self-transforming property of SA enables the dynamic bilateral anchoring at the buried interface, ultimately releasing residual stress and constructing a stable interfacial molecular bridge. The results show that SA molecular bridge not only can effectively inhibit the generation of diverse charged defects but also serves as an effective electron transport pathway, resulting in improved power conversion efficiency (PCE) from 23.19 to 25.50% and excellent stability at the maximum power point. Additionally, the PCEs of the flexible and large-area (1 cm 2 ) devices were increased to 24.92% and 24.01%, respectively, demonstrating the universal applicability of the bilateral anchoring to PSCs based on different substrates and larger area.
研究领域:
材料科学
·
能源技术
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纳米技术
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物理化学
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应用物理
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wenlan Ji,Yuan Wang,Yuanjie Xiong,Tian C. Zhang,Shaojun Yuan
To strengthen the utilization of free radicals and effectively enhance electrocatalytic performance and service lifetime of the β -PbO 2 electrode, herein, a novel hydrophobic TNAs/SnO 2 /PPy/ β -PbO 2 -Ce-SDS (abbreviated as β -PbO 2 -Ce-SDS) anode was synthesized by doping Ce 3+ and anionic surfactant (SDS) to TNAs/SnO 2 /PPy/ β -PbO 2 (abbreviated as β -PbO 2 ), which was constructed by growing SnO 2 /PPy/ β -PbO 2 multilayers on TiO 2 nanotube arrays (TNAs) via combination of electrodeposition and electro-polymerization processes. Notably, co-modification with Ce 3+ and SDS remarkably enhanced the surface hydrophobicity, electrochemical performance and catalytic ability of β -PbO 2 anode. Such β -PbO 2 -Ce-SDS anode not only substantially enhanced the As(III) conversion (96.96%) in the electrocatalytic oxidation process, but also prominently strengthened its service lifetime. Furthermore, the as-prepared β -PbO 2 -Ce-SDS anode possessed an excellent stability as its kinetic constant was only reduced from 0.18 to 0.14 min −1 even underwent 10 cycles of the electrocatalytic process, while that of the unmodified β -PbO 2 electrode decreased markedly by about 49%, owing to its appropriate surface hydrophobicity, smaller grains and denser β -PbO 2 layer. The reaction mechanism of electrocatalytic oxidation was associated with synergistic effects of hydroxyl radical ( OH), superoxide radicals ( O 2 − ), and sulfuric acid root radicals ( SO 4 − ). The β -PbO 2 -Ce-SDS anode provides a novel and feasible approach to development of various electrodes by doping metal ions and/or regulating with surfactants.
研究领域:
电化学
·
环境科学
·
材料科学
✓ 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）