Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 26
·16043-16051
·
IF 10.7
Keying Su,Shan Yang,Yulu Zhu,Yujia Liang,Yawen Tang,Xiaoyu Qiu
High-entropy alloy (HEA) nanoparticles have been recognized as one kind of efficient electro-catalyst for water splitting. However, their higher catalytic activity is restrained by the difficulty in precisely shaping the HEAs into ordered facets and fully exposed surface structures. Herein, we report a seed-mediated conformal growth and partial etching method for the controlled synthesis of PtIrRuRhPd HEA cubic nanocages (CNCs), which feature the ordered {100} facets and ultrathin shells of five atomic layers. The slow injection of a PtIrRuRh layer on Pd nanocubes and the subsequent capture of dissociative Pd atoms in the etching step are responsible for the formation of nearly equimolar PtIrRuRhPd HEAs. Due to the synergistic effects derived from the multicomponent high-entropy effects, the ordered (100) facets, and the ultrathin feature, the PtIrRuRhPd HEA CNCs exhibit significantly high electro-catalytic activities for hydrogen and oxygen evolution reactions in an acidic medium, with overpotentials of 20 mV and 272 mV at 10 mA cm−2 (η10), respectively. As electrodes for a water electrolyzer, the PtIrRuRhPd HEA CNCs afford an η10 as low as 196 mV, together with superior long-term durability for 200 000 s.
研究领域:
材料科学
·
电催化
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Jing Wu,Rong Zhao,Hui Xiang,Chenfan Yang,Wenda Zhong,Chengzhi Zhang,Qin Zhang,Xuanke Li,Nianjun Yang
Tin disulfide (SnS 2 ), one transition metal dichalcogenide (TMD) is a cost-effective and promising electrocatalyst for hydrogen evolution reactions (HER) in the alkaline electrolytes. Its electrocatalytic HER performance is unfortunately limited, originating from its un-conspicuous inherent catalytic activities and non-favorable adsorption sites for hydrogen. Herein, a tin disulfide/stannic oxide (SnS 2 /SnO 2 ) heterostructure is designed and grown on the nickel foam (denoted as SnS 2 /SnO 2 -NF). The SnS 2 /SnO 2 heterostructure introduces more active (100) facets or a high density of active sites, accelerates the diffusion kinetic of electrons and ions, lowers the water dissociation energies, and optimizes adsorption energies of hydrogen atoms. On this catalyst, superior HER performance is realized in an alkaline medium. An overpotential of 108 mV at a current density of −10 mA cm –2 with a Tafel slope of 50.1 mV dec –1 and long-term durability are achieved for HER in 1 M KOH. This work paves a new way to design high-performance HER electrocatalyst through facet engineering of the designed heterostructures.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 41
·6580-6588
·
IF 3.304
Pengwei Li,Dingding Li,Lina Liu,Anli Li,Cuixian Luo,Yue Xiao,Jie Hu,Huabei Jiang,Wendong Zhang
In this work, a concave structure of Cu2O truncated microcubes with {100} facet erosion has been successfully synthesized by a facile top-down etching method. Air and PVP were employed as an etchant and a shape controller agent, respectively. For the facet-selective capping of PVP on Cu2O {111} planes, the traditional relatively low energy {100} facets of Cu2O truncated microcubes would be selectively etched along their [100] zone axis in a top-down manner. The {100} facet etched Cu2O concave truncated microcubes exhibited highly improved photocatalytic activities (2.15 and 1.21 times, respectively) compared to that of the basic structure and the {111} facet etched samples on the degradation of Congo red (CR), displaying distinct facet-dependent photocatalytic characteristics, excellent stability and reusability. This work not only builds an efficient photocatalyst, but also provides a novel method to fabricate a variety of architectures with low energy facets etched and highly active crystal planes exposed, which is extremely important for the improvement of catalytic activities.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 26
·期 7
·5071-5077
·
IF 1.569
Li Anli,Li Pengwei,Hu Jie,Zhang Wendong
Single crystal Cu 2 O materials with morphologies of cube, truncated cube, truncated octahedron, octahedron etc. have been synthesized by a facile glucose reduction method. Polyvinylpyrrolidone concentration dependent, crystal-facet-controllable growth mechanism of the synthesized Cu 2 O crystals has been proposed in the article. The photocatalytic test results show that the octahedral Cu 2 O crystals with dominant {111} planes have super photocatalytic activity than the cubic ones packaged by {100} surfaces, which could be explained by that the polar, highly active {111} facets with unsaturated “Cu” have more excellent activity on the methyl orange dye degradation. This article will contribute to promote the morphology construction and crystal-dependent catalytic properties of metal oxide semiconductor materials.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2022
·Vol. 2022
·期 12
·e202200038
·
IF 2.551
Jing Zhou,Qinglei Jia,Gongguo Zhang,Haifeng Zhang,Na Zhao,Yiqun Zheng
Graphical Planar gold nanocrystals with a non-conventional quasi-square morphology, mainly enclosed with {100} facets, were successfully prepared via glutathione-mediated one-pot synthesis under kinetics control, exhibiting an enhanced electrochemical activity for methanol oxidation in alkaline medium. We report the preparation of gold (Au) nanosheets with a quasi-square morphology and curved edges (Au QSNSs). The atomic packing on the edge, corner, and central part of an individual Au QSNS is carefully observed via spherical aberration corrected high-resolution transmission electron microscopy, and the atomic-resolution images confirm the dominant presence of {100} facets on all these regions. Such type of two-dimensional nanostructure is of great interest, as conventional gold nanoplates/nanoprisms are mainly enclosed with {111} facets on upper/bottom faces. The use of glutathione and octadecyltrimethylammonium chloride as the shape-directing agent and the capping agent, respectively, at appropriate amounts, together with a dropwise addition of Au precursor at controlled rate, have been validated to be crucial for the formation of such a unique two-dimensional nanostructure. When acting as electrocatalysts for the methanol oxidation reaction in alkaline medium, the Au QSNSs/C exhibited noticeable enhancement, compared to spherical counterparts, in terms of mass activity, reaction kinetics, and long-term durability, demonstrating their structural advantage.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Zuohua Liu,Yujie Zheng,Tingting Gao,Jing Zhang,Xuefeng Sun,Guowei Zhou
In this study, anatase TiO 2 nanorods with exposed high-energy {100} and {001} facets and low-energy {101} facets were fabricated in the presence of surfactants cetyltrimethylammonium bromide , didecyldimethylammonium bromide, and ammonia via a facile hydrothermal method without the erosive reagent hydrofluoric acid . The particle size and morphology were mainly tuned by regulating the hydrothermal temperature. When the temperature was increased from 150 °C to 180 °C and 200 °C, the length of the nanorods decreased from 700-1000 nm to 400–500 nm and 100–200 nm, respectively. Concurrently, the edges and tops of the truncated tetragonal pyramid of the TiO 2 nanorods became blurry and flattened. The synthesized typical TiO 2 nanorods were then used as photocatalysts , and their performance during the direct generation of H 2 from water was evaluated. The TiO 2 nanorods obtained at 150 °C successfully produced high amounts of H 2 evolution (281.36 μmol) in the presence of methanol as a sacrificial agent under ultraviolet light irradiation for 4 h. The outstanding photocatalytic activity of the nanorods was mainly ascribed to the formation of surface heterojunctions in the edges and corners between adjacent high-energy {001} or {100} facets and low-energy {101} facets. The formed heterojunctions could facilitate charge separation through preferential carrier flow toward the specific facets.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Bo Zhou,Pei Zhao,Junxue Guo,Shuaifeng Hu,Xin Guo,Jiewei Liu,Can Li
While (111)-dominated perovskite films hold the potential for high-stability solar cells, most studies have primarily focused on modulating the (111) facets, overlooking the distribution and formation mechanism of the nondominant (100) facets. In this study, we delve into the (111) orientation via solvent regulation and investigate the evolution of facet distribution using various diffraction techniques. The findings reveal that simply stacking (111) facets does not inherently enhance solar cells. Instead, the distribution of nondominant (100) facets in (111)-dominated films significantly influences both photoelectric property and stability. These observations highlight the critical need to manage the interplay between dominant and nondominant facets. The study further offers strategies for addressing facet heterogeneity to achieve a uniform facet distribution. This research provides a comprehensive framework for understanding (111)-dominated perovskites and offers valuable guidance for designing high-performance perovskite solar cells.
研究领域:
材料科学
·
光伏技术
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2014
·Vol. 16
·期 15
·3091-3096
·
IF 3.858
Yong Yang,Guozhong Wang,Quan Deng,Shenghong Kang,Dickon H. L. Ng,Huijun Zhao
High-energy {100} faceted single crystal TiO2 nanorods were synthesized by a facile hydrothermal method. An interesting phase transition from the orthorhombic hydrogen titanate to anatase TiO2 was observed during the reaction process. A structural formation model of the TiO2 nanorods was proposed based on experimental evidence. The resultant {100} faceted TiO2 nanorods exhibited considerably enhanced photocatalytic activity towards degradation of organic pollutants and removal of heavy metal ions owing to the special one-dimensional structure with the reactive {100} facets, thus showing a great potential in the field of water treatment. At the same time, the synthetic route provided guidance for the synthesis of high-energy {100} facets using EDTA and urea as effective modifiers. This approach may be extended to synthesize other functional oxide crystals with well-defined morphologies and to increase the percentages of certain exposed facets.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Lili Gao,Langlang Qin,Haonan Wu,Xuelian Li,Kai Qi,Qun Yi,Jiandong Zhang,Lijuan Shi
Electrochemical reduction of CO 2 (CO 2 ER) to high value-added multicarbon (C 2+ ) is a viable way to promote carbon–neutral cycle. To date, copper (Cu) is reported as the most effective metal catalyst toward C 2+ , but it remains a challenge to achieve high selectivity and large current density. Incorporating ionic liquid in Cu-based catalysis has been proved an effective strategy, however, most reported methods are either involved too much ionic liquid (IL) as electrolyte or too complex & unstable. Herein, an ionic liquid-embedded Cu electrocatalyst (Cu-IL/GDL) was innovatively constructed through one-step electro-codeposition method, in which a kind of amino-ionic liquid, AFIL, was anchored to the gas diffusion layer (GDL) and embedded by the deposited Cu. Under the excellent synergy between Cu and AFIL, Cu-IL/GDL exhibits higher faradaic efficiency toward ethylene (C 2 H 4, 40.67%) and C 2 (C 2 H 4 and C 2 H 5 OH, 61.39%) when directing CO 2 to carbon-fiber side of electrode in H-cell. To be precise, more Cu (1 0 0) facet is stabilized by the capping effect of AFIL, being in favor for C–C coupling; meanwhile more AFIL + is embedded by the deposited Cu, making for the initiation of CO 2 ER. Thus, this paper proposes a facial and effective strategy to reinforce Cu (1 0 0) facet, and couple and heighten the virtues of ionic liquid and Cu during CO 2 ER toward C 2 .
研究领域:
化学
·
材料科学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Chuanxia Chen,Wendong Liu,Pengjuan Ni,Yuanyuan Jiang,Chenghui Zhang,Bo Wang,Jinkai Li,Bingqiang Cao,Yizhong Lu,Wei Chen
Enzyme-like activity and efficiency of nanomaterials are strongly controlled by their size, composition, and structure, and hence the structural parameters need to be optimized. Here, we report that two-dimensional Pd nanoplates enclosed by {100}-facets [{100}PdSP@rGO] exhibit substantially enhanced intrinsic oxidase-like activities relative to the {111}-facets ones and Pd nanocubes in catalyzing the chromogenic reaction of 3,3′,5,5′-tetramethylbenzidine. By taking ascorbic acid 2-phosphate as the substrate, which transforms to ascorbic acid in the presence of acid phosphatase (ACP), the {100}PdSP@rGO could be used as an efficient nanozyme for colorimetric ACP detection without resorting to destructive H2O2. A good linear relationship from 0.01 to 6.0 mU/mL with a detection limit of 8.3 μU/mL is obtained, which is better than most previously reported ACP assays. Importantly, the excellent assay performance could be successfully applied to ACP determination in serum samples with high accuracy. This study demonstrates that the enzyme-like activity of nanomaterials could be finely tuned simultaneously by controlling their exposed crystal facets and high specific surface area.
研究领域:
纳米酶学
·
生物分析化学
·
分子诊断
·
纳米材料学
·
临床检验医学
✓ 已验证
DOI
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 5
·2026-2038
·
IF 9.6
Xu Bin,Jia Lu,Yang Hui,Wang Yue,Fan Si-Yu,Yuan Sai-Sai,Zhang Qi-Tao,Zhang Ming,Ohno Teruhisa
In this study, the truncated octahedral CeO 2 (CeO 2 -to) with special morphology was prepared by the solvothermal method with oleic acid (OA) and oleamine (OM) as the morphology-directing agents. High-resolution transmission electron microscopy (HRTEM) results show that CeO 2 -to exposes composite {100} and {111} facets, while CeO 2 cubic (CeO 2 -c) and CeO 2 octahedral (CeO 2 -o) only expose single crystal facets of {100} plane and {111} plane, respectively. Interestingly, this CeO 2 -to photocatalyst exhibits remarkable photooxidation performance of gaseous acetaldehyde (CH 3 CHO) degradation, in which CO 2 generation value reaches 1.78 and 7.97-times greater than that of CeO 2 -c and CeO 2 -o, respectively. In addition, the active species trapping experiment signifies that superoxide (·O 2 − ) and holes (h + ) are the main reactive substances during the CH 3 CHO degradation process, and the electron paramagnetic resonance (EPR) spectra indicates that the former is the major contributor. Notably, the electron transfer mechanism between CeO 2 -to {100} and {111} facets and the surface oxygen adsorption ability are revealed via density functional theory (DFT) calculations. It is also confirmed that {100} facets are more conducive to the absorption of acetaldehyde than {111} facets. Finally, a reasonable mechanism for improved photocatalytic CH 3 CHO degradation on CeO 2 -to is proposed based on relevant experiments and DFT calculations. This study demonstrates that the systematic development of surface homojunction structured photocatalysts can efficiently increase the degradation activity for volatile organic compounds (VOCs). It also offers additional direction for optimizing the photocatalytic activity of other cerium-based photocatalysts. Graphical abstract
研究领域:
材料科学
·
环境科学
·
纳米技术
·
物理化学
·
催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）