JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Yumei Mao,Ying Zhang,Lei Li,Jing Li,Hongmei Zeng,Guohong Zou,Zhien Lin
Two new metal phosphates , namely, Zn(HPO 4 )(mmim) (SCU-21) and 2-Hmim·In(HPO 4 ) 2 (H 2 O) 2 (SCU-22), where mmim = 1,2-dimethylimidazole and 2-Hmim = 2-methylimidazolium, are synthesized and their properties are evaluated. The SCU-21 and SCU-22 compounds have layered structures with fes and sql nets, respectively. SCU-21 shows a strong blue emission under the excitation at 365 nm. SCU-22 shows a proton conductivity of 1.56 × 10 −5 S cm −1 at 85 °C under 95% relative humidity.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Materials
·
2014
·Vol. 7
·期 12
·8105-8130
·
IF 1.879
Xiaoshuang Qian,Hongmei Qin,Tao Meng,Yi Lin,Zhen Ma
Oxides (such as SiO2, TiO2, ZrO2, Al2O3, Fe2O3, CeO2) have often been used to prepare supported Pt catalysts for CO oxidation and other reactions, whereas metal phosphate-supported Pt catalysts for CO oxidation were rarely reported. Metal phosphates are a family of metal salts with high thermal stability and acid-base properties. Hydroxyapatite (Ca10(PO4)6(OH)2, denoted as Ca-P-O here) also has rich hydroxyls. Here we report a series of metal phosphate-supported Pt (Pt/M-P-O, M = Mg, Al, Ca, Fe, Co, Zn, La) catalysts for CO oxidation. Pt/Ca-P-O shows the highest activity. Relevant characterization was conducted using N2adsorption-desorption, inductively coupled plasma (ICP) atomic emission spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), CO2temperature-programmed desorption (CO2-TPD), X-ray photoelectron spectroscopy (XPS), and H2temperature-programmed reduction (H2-TPR). This work furnishes a new catalyst system for CO oxidation and other possible reactions.Keywords:metal phosphate;hydroxyapatite;Pt catalyst;CO oxidation
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2017
·
IF 2.299
Tong-Ying Chang,Chun-Li Hu,Dong Yan,Jiang-Gao Mao
Two new phosphates, non-centrosymmetric (NCS) (H 3 O)Ca 2 Zn 3.5 (PO 4 ) 4 and centrosymmetric (CS) Ba 2 Cd 3 (PO 4 ) 2 (HPO 4 ) 2 have been prepared by hydrothermal reactions . The single-crystal X-ray structural analyses have shown that they crystallized in space group P −42 1 c and P2 1 /c , respectively·(H 3 O)Ca 2 Zn 3.5 (PO 4 ) 4 features a three-dimensional (3D) network structure composed of ZnO 4 and PO 4 tetrahedra that are interconnected via corner-sharing, forming 1D channels of 6-MRs and 8-MRs which are filled by Ca 2+ and H 3 O + cations, respectively. Ba 2 Cd 3 (PO 4 ) 2 (HPO 4 ) 2 features a layered [Cd 3 (PO 4 ) 2 (HPO 4 ) 2 ] 4- composed of 1D chain of edge-sharing CdO 6 octahedra that are further bridged by PO 4 tetrahedra with Ba 2+ cations filling the interlayer spaces. Luminescent studies suggest that (H 3 O)Ca 2 Zn 3.5 (PO 4 ) 4 emits blue light. Optical diffuse reflectance spectra show the experimental band gaps for (H 3 O)Ca 2 Zn 3.5 (PO 4 ) 4 and Ba 2 Cd 3 (PO 4 ) 2 (HPO 4 ) 2 are 5.67 eV and 5.68 eV, respectively. The UV cut-off edge of title compounds are around at 218 nm·(H 3 O)Ca 2 Zn 3.5 (PO 4 ) 4 exhibits a very weak SHG response.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wenhui Tian,Penggang Ren,Xin Hou,Baoli Fan,Yilan Wang,Lu Pei,Hongtao Wang,Zhengyan Chen,Yanlin Jin
Transition-metal phosphates/phosphides showcase significant promise for energy-related applications because of their high theoretical electrochemical characteristics. However, sluggish electro/ion transfer rates and kinetically unfavorable reaction sites hinder their application at high mass loading. Herein, a self-supporting electrode based on transition-metal phosphates was successfully fabricated via a one-step electrodeposition process. The nanosheet structure of transition-metal phosphates, formed by interconnecting nanoparticles, effectively mitigates the impact of stress and achieves a high mass-loading (21 mg cm −2 ) of the electrode. Additionally, the oxygen vacancy-rich and porous nanostructure of transition-metal phosphates endows the as-prepared electrodes with a significantly increased conductivity and fast ion migration rate for enhancing electrochemical kinetics. Consequently, the as-fabricated transition-metal phosphate electrode displays the highest areal specific capacity of 39.2F cm −2 . Furthermore, the asymmetric supercapacitor achieves a maximum energy density of 0.79 mWh cm −2 and a high capacity retention of 93.0 % for 10000 cycles under 60 mA cm −2 . This work provides an ideal strategy for fabricating flexible electrodes with high mass loading and synthesizing transition-metal phosphate electrodes rich in oxygen vacancies.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 20
·6909-6918
·
IF 6.1
Hongjun Chen,Liming Deng,Sheng Zhao,Shuyi Liu,Feng Hu,Linlin Li,Jianwei Ren,Shengjie Peng
Developing efficient and durable hydrogen evolution reaction (HER) electrocatalysts is critical for industrial and sustainable hydrogen production. Herein, a simple co-precipitation strategy is proposed to successfully construct catalysts with a Mott–Schottky heterojunction by coupling a transition-metal phosphate to the surface of stripped MXene thin-layer nanosheets (M3(PO4)2@MXene, M = Co, Ni, and Fe). The Co3(PO4)2@MXene with a unique tightly connected 2D/2D heterostructure and built-in electric field induces directional electron transfer at the interface, regulates the polarized structure of the active sites, and accelerates both mass and electron transport. Consequently, the optimized Co3(PO4)2@MXene demonstrates outstanding HER performance, achieving low overpotentials of 46 and 58.6 mV at 10 mA cm−2 in alkaline freshwater and seawater electrolytes, respectively. Moreover, the Co3(PO4)2@MXene heterojunction catalyst maintains stable operation at a high current density of 500 mA cm−2 for over 100 h in alkaline seawater electrolytes. More importantly, Co3(PO4)2@MXene can offer a low potential of 1.71 V at 500 mA cm−2 with stable operation for 50 h in a flow-type alkaline seawater electrolyser. This study provides a unique heterostructure in an electrocatalyst for an efficient HER and presents its potential application in seawater electrolysis.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2025
·Vol. 15
·期 19
·10454
·
IF 2.5
Ruijie Wang,Yingpeng Gu,Mengfei Ma,Yue Sun
Currently, various techniques are efficient in eliminating high quantities of fluoride from water, while the deep treatment of a low concentration of fluoridated water is inadequate. In this work, four metallic phosphates were synthesized, including YP, ZrP, CeP, and LaP, to enhance the elimination of fluoride. The X-ray diffractometer data demonstrated that ZrP was amorphous, while CeP, LaP, and YP were highly crystalline. YP had a strong fluoride removal ability in a neutral environment, and ZrP exhibited a superior fluoride adsorption effect in acidic media. The adsorption kinetic results suggested that YP, CeP, and LaP could achieve the adsorption equilibrium within 150 min, which was faster than ZrP. YP had the largest fluoride adsorption capacity fitted by Langmuir of 31.61 mg/g at 298 K, followed by ZrP, which was greater than those of CeP and LaP. All four metallic phosphates showed high selectivity in the interference of competing anions and organics, with YP and ZrP exhibiting superior selectivity than CeP and LaP. The adsorption mechanism was ligand exchange between metallic phosphate particles and fluoride, which was validated by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The adsorption rate of metallic phosphates remained essentially stable in five consecutive adsorption–desorption cycles. Overall, metallic phosphates, especially YP and ZrP, have enormous potential in enhancing fluoride removal in the treatment of fluoridated water.
研究领域:
环境科学
·
水处理技术
·
材料化学
·
吸附学
·
环境污染控制
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2020
·
IF 3.687
Fu Yang,Jin Wang,Shuying Gao,Shijian Zhou,Yan Kong
Herein, we report an excellent in-situ exsolution triggered hydrogenated catalyst F-Ni/Cu-P-RT started from bimetallic phosphate Ni/Cu-P-RT, affording an ultrafast catalytic hydrogenated rate (20 s even 5 s) in nitrophenol reduction. In the first catalytic cycle, we proved the enhanced catalytic reduction activity of bimetallic Ni/Cu-P-RT within 50 s compared to monometallic counterparts. The kinetics results revealed Ni/Cu-P-RT affords the reaction rate K of 2.85/4.23/6.6 min −1 at 20, 30, and 40 °C with the activation energy 32 kJ/mol. Impressively, the involved reaction induction period is visibly observed and interpreted by reconstruction and evolution of active metal during the reaction, but was eliminated through integrating two metal Cu-Ni by regulation of electronic band energy of phosphate from 4.1–3.5 eV. The nascent Cu and Ni nanoparticles as reaction-preferred active species were in-situ exsolved partially after adding NaBH 4 , triggering the resulted higher active and stable F-Ni/Cu-P-RT(20 s, 14.1 min −1 ) in later multiple cycles.
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
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Lian-Hua Xu,Hai-Bo Zeng,Xue-Ji Zhang,Serge Cosnier,Robert S. Marks,Dan Shan
Tuning the coordination environment between metal centers and organic ligands is a promising way to design of the precursors of electrocatalysts for water splitting or other renewable energy options. In this work, a novel coordinated polymer was prepared feasibly in polyvinyl pyrrolidone (PVP) aqueous solution using aminotrimethylene phosphonic acid (ATMP, L 1 ) and 2-methylimidazole (MeMI, L 2 ) as ligands with the ratio of 2:5, Co 2+ and Zn 2+ as metal centers. Based on the concept of acid-base neutralization reaction, the proton-transfer induced “deprotonation and protonation” for L 1 and L 2 , respectively. Thus, the coordination was dominated by the deprotonated L 1 . Owing to also partial of protonated L 2 adsorbed as “counter ions”, carbonization of the obtained precursor at 800 °C under N 2 atmosphere endows the pyrolysis product with nitrogen-doped carbon supported metal pyrophosphate (M 2 P 2 O 7 @NC). Thus, the resulting M 2 P 2 O 7 @NC exhibits the enhanced and durable ORR and HER performance. For ORR in 0.1 M KOH, an enhanced onset potential (0.925 V vs. RHE), half wave potential (0.793 V vs. RHE) and diffusion limiting current (6.132 mA cm −2 ) can be obtained comparable to those of Pt/C. For HER in 0.5 M H 2 SO 4 , it only needs an over potential of 180 mV to realize a current density of 10 mA cm −2 .
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Jiarong Lv,Yanyan Qian,Qun Jing,Xinmei Wang,Ming-Hsien Lee,Zhaohui Chen
For phosphate nonlinear optical (NLO) materials, how to improve their small birefringence is confronted with a great contradiction of their weak optical anisotropy of tetrahedral PO4 groups. Herein, by introducing La3+ with a closed-shell structure and Cd2+ with a d10 electronic configuration, two NLO materials with a large birefringence, namely, La(PO3)3 (0.040@1064 nm) and β-Cd(PO3)2 (0.059@1064 nm), have been synthesized by a high-temperature solution method. In particular, for β-Cd(PO3)2, it possesses the largest birefringence among the known deep-ultraviolet (DUV) phosphates to date, which is attributed to cooperative effects of strong covalence of Cd–O groups and P–O pseudolayers similar to those of a plane. Meanwhile, β-Cd(PO3)2 exhibits the shortest cutoff edge (<190 nm) among the reported Cd-based inorganic compounds and realizes a balance between DUV transparence and a large birefringence. This insight provides a new opportunity to design high-performance NLO materials using metal phosphates.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Jianzhi Wang,Hongyi Chen,Hongliang Yu,Wangshu Tang,Yuanhang Wu,Yijie Yang,Yu Luo,Jie Yang,Faquan Yu
Designing efficient and cost-effective nonprecious electrocatalysts for the hydrogen evolution reaction (HER) in alkaline solution still remains a significant challenge. Herein, we fabricated a three-dimensional (3D) transition bimetallic phosphate/reduced graphene oxide grown in situ on a nickel foam (NiCoP@rGO/NF) for the HER in alkaline media. NiCoP@rGO/NF exhibits a unique three-dimensional spherical nanostructure with a large specific surface area and short diffusion path, which are conducive to the transfer of electrons. NiCoP@rGO/NF requires an overpotential of only 94 mV at a current density of 10 mA cm−2, with a low Tafel slope (39 mV dec−1), and demonstrates excellent durability in 1.0 M KOH condition. Our work provides a new idea for designing high-performance HER electrocatalysts, which are highly needed in various practical applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Xing Cao,Rui Ma,Qiushi Zhang,Weibing Wang,Qinxiong Liao,Shichang Sun,Peixin Zhang,Xiangli Liu
Magnesium potassium phosphate cement (MKPC) is prepared from MgO and KH 2 PO 4 through an acid-base reaction and has been widely used in the rapid repairs of building structures and the solidification/stabilization (S/S) of heavy metals (HMs). The use of sludge incineration residue (SIR) rich in phosphorus resources to prepare SIR-based MKPC can achieve the reclamation of SIR and efficient HM S/S. Herein, based on the exploration of the optimal MKPC magnesia/phosphate ratio (M/P), the effects of SIR and HMs on the performance of the matrix and its interaction mechanism were comprehensively investigated. The results indicated that the compressive strength of the SIR-based MKPC increased first and then decreased with the gradual increase of SIR incorporation; the optimal was reached at 40.31 MPa when the SIR incorporation was 5 wt%. The peak signal and crystal lattice of Pb 2 (PO 4 ) 3 indicated that there is a mixed effect between HMs (in SIR) and KH 2 PO 4 . The Visual MINTEQ analysis results also indicated that HMs are precipitated as HM phosphates. The formation of HM phosphates not only increases the M/P (with 30 wt% SIR, M/P increased by 0.019), affecting the microstructure and changing the compressive strength of the matrix, but also promotes the transformation of HMs from the bioavailable to the more stable residual forms. The residual forms of the six HMs were all above 84% after S/S. Therefore, the SIR-based MKPC preparation significantly immobilized the HMs; particularly, the leaching toxicities of Cu (96.6%) and Zn (96.3%) were alleviated.
研究领域:
环境科学
·
材料科学
·
废物管理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Lei Guo,Jing Xie,Shiyi Chen,Zexing He,Yuezheng Liu,Chengxiang Shi,Ruijie Gao,Lun Pan,Zhen-Feng Huang,Xiangwen Zhang,Ji-Jun Zou
Developing affordable and efficient electrocatalysts toward water electrolysis under industrial conditions is crucial for large-scale production of green hydrogen. In this regard, we propose a facile and mild method to construct crystalline-amorphous composites of metal phosphate (MPi) and NiS on nickel foam (NF) for practical water electrolysis. The as-prepared electrodes exhibit excellent performance, achieving a remarkable current density of 1000 mA cm –2 at the ultralow overpotential of 345 and 223 mV for FePi-NiS/NF (oxygen evolution reaction, OER) and NiCoPi-NiS/NF (hydrogen evolution reaction, HER), respectively. The composites can undergo an in-situ transformation into highly active and targeted species under high current density, which possess a unique pore structure interconnected by nanosheets that provides an abundance of catalytic sites and open channels for efficient bubble diffusion. When operated under industrial conditions (6 M KOH, 70 °C), the assembled electrode requires only 1.712 V to attain a current density of 1000 mA cm −2 . The electrodes also demonstrate exceptional performance in alkaline electrolysis with an anion exchange membrane (AEMWE) when scaled up to a larger size (area: ≈ 25 cm 2 ). Specifically, they achieve a substantial current of 12.5 A at 1.87 V with a high energy efficiency of 79.2 % and remarkable durability over 30 h under industrial electrolysis conditions (1 M KOH, 50 °C), outperforming benchmark Pt/C/NF || IrO 2 /NF electrodes with energy saving of 0.215 kWh Nm –3 . This work provides a cost-effective and efficient strategy for designing and constructing stable and active catalysts for water electrolysis under harsh industrial conditions.
研究领域:
材料科学
·
电化学
·
能源工程
·
催化
✓ 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）