APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Yi Han,Hongdong Li,Mingjuan Zhang,Yunlei Fu,Yanru Liu,Yu Yang,Jixiang Xu,Yanling Geng,Lei Wang
The development of relatively inexpensive and highly active electrocatalyst for water splitting is essential to the energy conversion and sustainable economic improvement. In this work, based on nanostructure engineering, the CoSe 2 -Ni 3 Se 2 nanoparticles coated Co(CO 3 ) 0.5 (OH)·0.11H 2 O nanoneedles supported on the surface of Ni foam (NF) composite (CoSe 2 -Ni 3 Se 2 /NF) had been synthesized by a facile hydrothermal selenization method. Benefiting from the adequate nanostructure and moderate degree of selenization treatment, the obtained sample CoSe 2 -Ni 3 Se 2 /NF-0.4 using 0.4 g Se powder as selenium source shows remarkable electrocatalytic performance and electrochemical stability for either hydrogen evolution reaction (HER) or oxygen evolution reaction (OER). CoSe 2 -Ni 3 Se 2 /NF-0.4 only required 98 mV (vs. RHE) to reach the 10 mA cm −2 for HER and 344 mV (vs. RHE) to reach 100 mA cm −2 for OER in 1.0 M KOH solution. This work provides a simple strategy to controllably synthesize transitional metal diselenium-based electrocatalyst with adjustable amount of active phase, which are very important for the future development of the bifunctional electrocatalyst.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Haiping Li,Tingxia Hu,Renjie Zhang,Jianqiang Liu,Wanguo Hou
Up to now, studies on solid-state Z-scheme two-component heterojunctions have hardly referred to roles of interfacial internal electric fields (IEFs). Herein, solid-state Z-scheme Bi 2 MoO 6 /MO (M = Cu, Co 3/4 , or Ni) heterojunction photocatalysts were simply synthesized, for the first time, with enhanced photocatalytic performance toward organic degradation. Electron microscopy images reveal that the MO homogeneously distributes on surfaces of the Bi 2 MoO 6 hierarchical microspheres, and they close contact with distinct heterojunction interfaces. X-ray photoelectron spectra (XPS) suggest that the electron transfer occurs between the Bi 2 MoO 6 and MO after they contact, resulting in formation of IEFs at their interfaces. Based on band gap values and valance-band XPS and ultraviolet photoelectron spectra, energy band levels of the Bi 2 MoO 6 and MO are defined, and directions of the interfacial IEFs are determined. The IEFs play key roles for the formation of the Z-scheme Bi 2 MoO 6 /MO heterojunctions and for the photoactivity enhancement. This work provides a better insight into the formation mechanism of solid-state two-component Z-scheme heterojunctions and a significant experimental guidance for studying other similar systems.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Materials Chemistry Frontiers
·
2023
·Vol. 7
·期 13
·2628-2636
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IF 7
Lixia Wang,Meilin Huang,Mingcheng Gao,Tayirjan Taylor Isimjan,Xiulin Yang
Effective control of strong electron interaction at heterogeneous interfaces is crucial for the creation of highly efficient and stable bifunctional catalysts for water splitting. In this work, we synthesized an urchin-like CoP–Ce2(CO3)2O catalyst on nickel foam (CoP–Ce2(CO3)2O/NF) via a facile hydrothermal and gas-phase phosphating process, which enhances active site exposure and improves catalytic reaction kinetics. Spectroscopy analysis reveals that the enhanced performance is due to the charge transfer between CoP and Ce2(CO3)2O and the unique urchin-like structure of the hybrid catalyst. The CoP–Ce2(CO3)2O/NF catalyst showed excellent hydrogen/oxygen evolution reaction (HER/OER) performance (η10 = 85.2 and 205.5 mV) and robust long-term stability in 1.0 M KOH. Additionally, the CoP–Ce2(CO3)2O/NF(+)||CoP–Ce2(CO3)2O/NF(−) electrolyzer required only a low cell voltage of 1.82 V to produce 100 mA cm−2 for overall water splitting, outperforming most previous catalysts. This work presents a strategy for interfacial engineering to improve the activity of bifunctional heterojunction electrocatalysts for overall water splitting.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xiaoxi Yu,Xiaocui Wu,Fang Guo,Jingping Liu,Qingshan Zhao
As a promising advanced oxidation process , photo-assisted peroxymonosulfate (PMS) activation for wastewater treatment has attracted widespread attentions. However, rational design of synergetic and recyclable catalysts for PMS photo-activation remains a big challenge. In this study, a carbon layer-coated amorphous CoO x supported on graphitic carbon nitride (CoO x @C/g-C 3 N 4 ) composite was fabricated to drive visible-light-assisted activation of PMS for efficient organic pollutant degradation. Amorphous CoO x nanoparticles were in-situ grown on two-dimensional g-C 3 N 4 substrate, among which a carbon layer serves as a high-speed electron transmission channel, facilitating the separation of photogenerated electron-hole pairs and accelerating the Co 3+ /Co 2+ redox cycle. Simultaneously, the carbon layer provides a protective film to suppress Co leaching, thereby improving the catalytic activity and reusability. Owing to the unique heterostructure and synergetic effect, the optimized 6% CoO x @C/g-C 3 N 4 composite exhibits superior catalytic efficiency and excellent cycling stability towards the degradation of various organic pollutants, which displays nearly 100% elimination of tetracycline (TC) within 80 mins. The h + , SO 4 •- and •OH are determined as the main contributors in the visible light-assisted PMS activation system, and the possible catalytic mechanism is also proposed. This work demonstrates a feasible strategy for constructing synergetic and effective photo-activation PMS catalysts for water remediation.
研究领域:
环境科学
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化学工程
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材料科学
·
水处理
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产品关联
DOI
高影响因子
POLYMER COMPOSITES
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2025
·
IF 4.7
Yifeng Lai,Jun Liu,Xiaowei Hu,Yiju Zhu,Yuting Yang,Xuan Yang,Guowen Peng,Songbo Tan
The development of efficient gamma-ray shielding materials is crucial for addressing increasingly complex radiation environments. In this study, (BiO) 4 CO 3 (OH) 2 (BCH) and (BiO) 4 CO 3 (OH) 2 @Gd 2 O(CO 3 ) 2 ·H 2 O (BG) fillers were synthesized via a hydrothermal method. After being dispersed into epoxy resin by mechanical stirring, the mixtures were molded using a vacuum-assisted thermal curing process. Under 59.5 keV gamma irradiation, the linear attenuation coefficient (LAC) of BG/EP-50 reached 5.8 cm −1 , representing an 84% increase compared to BCH/EP-50 (3.15 cm −1 ) and about 33 times that of pure EP (0.17 cm −1 ). In addition, the temperature at 50% weight loss (T 50% ) of BG/EP-50 increased to 637.9〬C, which is 60.9% higher than that of the epoxy matrix, indicating improved thermal stability. The BG filler, constructed through a simple two-step hydrothermal route, demonstrated a synergistic effect between Bi and Gd components, which not only compensated for the limitations of Bi in the low-energy region but also enhanced the gamma shielding capability of the epoxy resin at higher energies. Compared to several shielding materials reported in recent years, BG/EP-50 shows superior performance and offers a promising strategy for lightweight and environmentally friendly polymer-based gamma shielding materials.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 25
·13308-13316
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IF 7.443
Bin Yang,Lei Yu,Huijun Yan,Yanbo Sun,Qi Liu,Jingyuan Liu,Dalei Song,Songxia Hu,Yi Yuan,Lianhe Liu,Jun Wang
Pseudocapacitor electrode materials, such as transition metal oxides/sulfides, have been extensively investigated and shown to have fast energy storage properties, but their low rate performance and poor cycle stability are serious problems in practical applications. We present here a design for the architecture of these electrode materials with the aim of improving the rate performance and cycle stability of pseudocapacitors by using an interface ion-exchange method. Precursor materials obtained by a hydrothermal reaction were soaked in aqueous NaHS solution to synthesize the urchin-like core–shell structure of NiCo2(CO3)1.5(OH)3@NiCo2S4. Such core–shell nanostructure electrode materials can make full use of both components with synergistic effects. Excellent results were obtained with a capacitance of 956.4 F g−1 at a current density of 4 A g−1 in the three-electrode system and an actual energy density of 32.3 W h kg−1 and power density of 1835 W kg−1 in the asymmetrical supercapacitor.
研究领域:
材料科学
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电化学
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储能
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纳米材料
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超级电容器
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Yiping Qiu,Xingyue Wu,Junyao Li,Zheng-Zhi Yin,Yong Qin,Yong Kong
In situ growth of Cu 2+1 O/Cu 2 (CO 3 )(OH) 2 /Co(OH) 2 on carbon cloth (CC) is achieved via a facile wet chemical oxidation strategy combined with hydrothermal method , and the self-supported Cu 2+1 O/Cu 2 (CO 3 )(OH) 2 /Co(OH) 2 displays a unique multi-dimensional hybrid structure. Cu 2+1 O (CuO with excess metal defects) electroless plated on the surface of CC can not only retain the nanostructures of Cu 2 (CO 3 )(OH) 2 and Co(OH) 2 , but also act as the buffer layer to ease volumetric expansion of the materials during the repeated charge/discharge process. When the CC@Cu 2+1 O/Cu 2 (CO 3 )(OH) 2 /Co(OH) 2 is used in flexible supercapacitors , it exhibits significantly enhanced areal specific capacitance (624.5 mF cm 2 at 0.5 mA cm 2 ), rate capability (86.6 %), cyclic stability (100.3 % retention after 1500 cycles) and coulombic efficiency (99.3 % retention after 1500 cycles) due to the synergistic effect of Cu 2+1 O buffer layer, two-dimensional (2D) Co(OH) 2 nanosheets and three-dimensional (3D) Cu 2 (CO 3 )(OH) 2 nanoblocks.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2019
·
IF 7.65
Jinping Zhong,Yikui Zeng,Dongdong Chen,Shengpeng Mo,Mingyuan Zhang,Mingli Fu,Junliang Wu,Zixue Su,Peirong Chen,Daiqi Ye
Series of Co 3+ -rich spinel Co 3 O 4 catalysts were synthesized and evaluated by toluene catalytic oxidation. An outstanding activity was achieved over Co 3 O 4 -N utilizing Co(NO 3 ) 2 ·6H 2 O as precursor (T 50 = 211 °C, T 90 = 217 °C at conditions: 1000 ppm(v), WHSV = 60 000 mL g −1 h −1 ). Results of comparative characterizations demonstrated that such excellent performance was mainly attributed to large surface area, high reducibility at low temperature, high abundance of Co 3+ ions and structure defects, as well as highly active surface oxygen. The results of in situ DRIFTS revealed that in the air or N 2 atmosphere, the by-products were almost the same. The reaction pathway of toluene oxidation can be described as follow: transformation of toluene from benzyl alcohol, benzaldehyde, benzoate, benzene, phenol, benzoquinone, maleic acid and to final products, which were fully confirmed by PTR-TOF-MS. Besides, ring opened by-products, such as acetone, acetic acid, acetaldehyde, etc. were also detected. In this work, the combination of in situ DRIFTS and PTR-TOF-MS provided a promising approach for further understanding of the mechanism of VOCs elimination.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 56
·期 4
·3011-3023
·
IF 3.553
Wang Jing,Li Jing,Liu Yuanyuan,Wang Meiri,Cui Hongtao
The cycling stability of electrode materials is a key for Faraday supercapacitors (FSs), especially the structure-unstable Ni(OH) 2 . There exist various strategies for stabilizing the structure of Ni(OH) 2 such as cobalt ions doping and mechanical support from substrate. However, these strategies have their own disadvantages. On the other hand, the combination of two or more strategies has the serious issues in materials synthesis. In this work, a branched nanosheets-interlaced structure of Co 2+ /Co 3+ -doped Ni(OH) 2 is built by a method of precursor template, which effectively applies two strategies including ions doping and self-supportive structure. Due to the synergistic contribution of these two strategies, the cycling stability of as-prepared material is significantly enhanced. This material also presents excellent high-rate capacity, and the as-assembled asymmetric supercapacitors (ASCs) show both high energy and power densities. These results prove that the effective combination of ions doping and self-supportive structure strategies is a promising route for the preparation of Ni(OH) 2 -based electrode materials with high performance.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Zhong-Shuai Zhu,Xiao-Jie Yu,Jin Qu,Ya-Qiong Jing,Yasmine Abdelkrim,Zhong-Zhen Yu
Low crystalline flowerlike cobalt silicate hydroxide (Co 3 (Si 2 O 5 ) 2 (OH) 2 , CoSiO x ) is synthesized by a one-pot hydrothermal approach. Abundant highly active Co OH + is preformed on the surface of CoSiO x , while the low crystallinity of CoSiO x leads to the formation of active 1 O 2 caused by the generation of oxygen vacancy in the valence change cycle between Co 2+ and Co 3+ . The optimal CoSiO x with a high specific surface area of 665.2 m 2 g −1 could expose surface Co OH + , thus rapidly activate peroxymonosulfate (PMS) and accelerate catalytic efficiencies. As a result, at least 11 kinds of organic pollutants could be degraded with 33–242% higher efficiencies than reported. In addition to the common SO 4 - and OH, large amounts of active 1 O 2 endow the CoSiO x /PMS system with superb catalytic performances in diverse conditions, suggesting the excellent adaptability for practical usage. This work provides a new protocol to advance the PMS activation process for high-performance cobalt based heterogeneous catalysts.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Junli Nie,Gangqiang Zhu,Weibin Zhang,Jianzhi Gao,Peng Zhong,Xiaotao Xie,Yu Huang,Mirabbos Hojamberdiev
Flower-like n -type CeO 2-δ is hybridized with p -type β-Bi 2 O 3 nanoparticles to design a novel β-Bi 2 O 3 /CeO 2-δ p - n heterojunction photocatalyst via a thermal treatment process of Bi/Ce(CO 3 )(OH) precursor. The synthesized β-Bi 2 O 3 /CeO 2-δ exhibits a remarkable enhancement in NO removal and significant suppression of toxic intermediates nitrogen dioxide (NO 2 ) under visible light irradiation. The superior photocatalytic activity of β-Bi 2 O 3 /CeO 2-δ for NO removal is mainly derived from the synergistic effects of the oxygen vacancies (OVs) and p-n heterojunction. The OVs not only enhance the visible light utilization and boost the separation of electron-hole pairs but also improve the adsorption and activation of NO and O 2 . Particularly, the p-n heterojunction is beneficial for the interfacial migration of photogenerated charge carriers. Electron spin resonance (ESR) and trapping experiment reveal that the synergistic effects of OVs and p-n heterojunction can induce the generation of more active species. The electrochemical measurements and density-functional theory (DFT) calculations in-depth confirm that both p-n heterojunction and OVs can accelerate the interfacial charge transfer, resulting in the deep oxidation of reactants. Therefore, the flower-like β-Bi 2 O 3 /CeO 2-δ p-n heterojunction photocatalyst exhibits an advanced photocatalytic activity for deep NO removal and a suppressed NO 2 generation. In addition, monitoring the reaction products by in situ Fourier transform infrared spectrum (FTIR) further validates that the main products of nitrates are formed during the photocatalytic process. This work demonstrates a straightforward approach for construction of p-n heterojunction photocatalysts, which can enhance the effective photocatalytic activity and stability for NO removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 21.1
He Xu,Xinyu Wang,Jingjing Wang,Jingyao Wang,Yujie Liu,Lianghui Xia,Yingying Yong,Yanfei Jian,Reem Albilali,Chi He
The widely presented industrial light alkanes (LAs) have posed significant hazards to the environment and human health; however, the efficacious catalytic purification of LAs is still greatly suffered from their strong chemical stability and catalyst deactivation due to the presence of sulfur-containing impurity in practical exhausts. Herein, cobalt phosphate (Co 3 (PO 4 ) 2 )-modified Pt/CeO 2 catalysts (Pt/CeO 2 - x CP) with boosted activity and sulfur resistance were rationally engineered. Results revealed that Pt/CeO 2 -0.2CP shows the highest C 3 H 8 oxidation activity with 90 % of which oxidized at 260 °C and apparent activation energy ( E a ) of 84.39 kJ∙mol −1 , obviously lower than that of Pt/CeO 2 . Remarkably, the activity of Pt/CeO 2 -0.2CP is well-maintained in 24 h of successive operation with the co-existence of 250 H 2 S, while over 20 % of C 3 H 8 conversion reduction can be found over Pt/CeO 2 due to the deactivation of Pt 4+ active sites by surface sulfation. The Co 3 (PO 4 ) 2 -Pt interface promotes the electron transfer from Pt δ+ to phosphorus component and weakens the Pt-O-Ce bond, thereby generating more highly active Pt 4+ sites and oxygen vacancy, polarizing the electron cloud around the C-H bond and oxygen molecules and promoting C 3 H 8 oxidation. Meanwhile, the Co 3 (PO 4 ) 2 modification optimizes the surface acidity of Pt/CeO 2 -CP, effectively weakens the adsorption and oxidation of H 2 S, and maintains the formation and consumption of high active oxygen species, resulting in strong sulfur resistance. This work provides important insights for the rational design of efficient sulfur-tolerant catalysts towards LAs purification under harsh conditions.
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高影响因子
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