INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Wenkai Huang,Fuhua Xu,Xiang Liu
Sodium borohydride has been widely regarded as a promising hydrogen carrier owing to its greatly hydrogen storing capability (10.8 wt%), high weight density and excellent stability in alkaline solutions. Herein, we first design and synthesize a series of bimetallic M-Ru/C nanocomposites (including Fe–Ru/C, Co–Ru/C, Ni–Ru/C and Cu–Ru/C), via simply alloying of commercial Ru/C with nonprecious metal, for superior H 2 evolution from the NaBH 4 hydrolysis. The result exhibits that H 2 generation is synergetically improved by alloying Ru/C with Co or Ni, while it is hindered by alloying Ru/C with Fe or Cu. Indeed, Co–Ru/C presents the highest efficient catalytic activity for H 2 generation, with the TOF of 117.69 mol(H 2 )·mol Ru −1 ·min −1 , whereas Ru/C is only 57.08 mol(H 2 )·mol Ru −1 ·min −1 . In addition, the TOF of Co–Ru/C reaches to 436.51 mol(H 2 )·mol Ru −1 ·min −1 (96.7 L(H 2 )·g Ru −1 ·min −1 ) in the presence of NaOH.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2021
·
IF 3.247
Donghai Yuan,Wanxia Liu,Jiazhuo Wang,Jun Cui,Liansheng He,Chenling Yan,Yingying Kou,Junqi Li
In this study, an efficient adsorption and reusable magnetic ligand material (Fe3O4@Chitosan-EDTA) was synthesized by binding EDTA dianhydride onto magnetic chitosan, and it was employed in removal of Co(II) from aqueous solution. The maximum adsorption capacity of Co(II) onto Fe3O4@CS-EDTA was 48.78 mg/g at pH = 5 (303 K), which is much higher than that of Fe3O4@Chitosan as well as chitosan. The kinetics of Co(II) on the Fe3O4@CS-EDTA was consistent with the pseudo-second-order model. The equilibrium data were better fit with the Langmuir isothermal model than with the Freundlich isothermal model, suggesting that the adsorption mechanism was chemical monolayer homogeneous adsorption. The thermodynamic data showed that the sorption of Co(II) was spontaneous. Furthermore, after four cycles, the adsorption capacity of Co(II) onto the Fe3O4@CS-EDTA still retained 84.5% of the capacity of the fresh adsorbent, indicating that Fe3O4@CS-EDTA can be considered a promising recyclable adsorbent to remove heavy-metal ions from wastewater.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Yun Gao,Panpan Cui,Jie Liu,Weiwei Sun,Shuangqiang Chen,Shulei Chou,Li-Ping Lv,Yong Wang
Porous carbon materials with a synergistically large specific surface area (SBET) and an adjustable structure are urgently needed to meet the demands of high-performance supercapacitors (SCs) and other electrochemical devices. Although numerous studies have been dedicated to designing multifunctional porous carbons, most of them still have shown hard-control doping sites and unclear structures. Herein, we prepare a series of structure-controlled F/N co-doped porous carbons (FNCs) with large SBETvia an in situ doping process based on F- and N-rich covalent triazine-based frameworks (FCTFs) as precursors. The as-prepared high-F/N-containing FNC-700 with a large SBET (∼1849.1 m2 g–1) as the aqueous-based SC electrode achieves a specific capacitance (Cs) of 326 F g–1 at 1 A g–1, remarkable cyclability with negligible capacitance decay after 10,000 cycles in three-electrode systems, and a maximum energy density of 31.4 Wh kg–1 in two-electrode systems. This study has an insightful hint in exploring multifunctional heteroatom-doped carbons by the in situ doping process.
✓ 已验证
产品关联
DOI
高影响因子
Colloid and Interface Science Communications
·
2021
·
IF 4.914
Yuze Zhang,Lijuan Li,Dong Shi,Fugen Song
Layered double hydroxides intercalated with sorbate anion (SLDHs) was a potential material for sorbic acid controlled-releasing, UV barrier, reinforcement of rubber and flame retardancy filler. The addition reactions of sorbate anion (SAa) with ethylene and H radical were calculated as spontaneous on B3LYP/6–311++ (d, p) theory level by GAMESS-US and the electrostatic potential (ESP) of SAa was calculated by Multiwfn package and figured by VMD. SLDHs was successfully synthesized by co-precipitation with chlorides, and intercalating way of SAa was first constructed by electrostatic potential analysis, and then the successful intercalation of SAa was confirmed by X-ray diffractions (XRD) and Fourier transform infrared spectroscopy (FTIR). SLDHs possessed assembled flaky morphology and have good thermal stability with a water contact angle near 95°. This study may have a significance on the promotion of the scale application of SLDHs practically.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 23
·13678-13687
·
IF 12.732
Dan Wang,Hao Xu,Peixia Yang,Xiangyu Lu,Jingyuan Ma,Ruopeng Li,Lihui Xiao,Jinqiu Zhang,Maozhong An
Compared to individual metal sites, e.g. Fe–N4 sites, the synergistic effect of dual-metal sites can further adjust the interaction of reactants or intermediates with active sites, which is beneficial for boosting the oxygen reduction reaction (ORR) in Zn–air batteries. However, developing a simple and direct method instead of complicated procedures and post-treatment to realize well-defined dual-metal sites is still a grand challenge. Herein, a facile one-step impregnation-pyrolysis route without any post-treatment is developed to controllably synthesize Fe and Co dual-metal sites embedded in hierarchical N-doped carbon from metal–organic frameworks. X-ray absorption spectra coupled with density functional theory calculations demonstrate that the Fe–N4 and Co–N4 dual sites can synergistically enhance the ORR activity. Impressively, the well-controlled FeCo–N–C catalyst exhibits excellent ORR performance, with half-wave potentials (E1/2) of 0.807 and 0.904 V in 0.1 M HClO4 and 0.1 M KOH, respectively. Benefiting from the highly active dual-metal sites and desired porous structure, FeCo–N–C serving as a cathode catalyst achieves an uplifting peak power density of 196.3 mW cm−2 and a remarkable specific capacity of 728.6 mA h gZn−1 at a discharge current density of 20 mA cm−2 in a practical liquid Zn–air battery. Besides this, such superb battery performance is demonstrated in an all-solid-state Zn–air battery.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Ping Ma,Xianliang Li,Yuchi Zhang,Le Han,Yan Xu
In this work, hierarchical spinel-type semiconductors MGa 2 O 4 (M = Ni, Co) were successfully synthesized via a facile hydrothermal method and a subsequent calcination strategy. The phase compositions, microstructures, as well as the gas sensing performances of these isostructural corn-like MGa 2 O 4 (M = Ni, Co) architectures were comparatively and systematically investigated. The experimental results showed that the hierarchical corn-like NiGa 2 O 4 spinel exhibited the optimum selective triethylamine (TEA) sensing performance with a gas response value (R g /R a ) of 7.60 at 270 °C, and excellent long-term stability for at least one month. The TEA gaseous sensing properties of these materials were significantly influenced by the transition metal M(II) ions dominated at the octahedral sites of spinel, and the sensing mechanism involving the surface redox reactions between the active oxygen species and TEA gases, as well as the charge carrier hopping process and changes of conductivity were discussed. This work not only demonstrated the facile preparation of hierarchical corn-like spinel-based gas sensors with rich active sites, we also discovered that the gas sensing performances of MGa 2 O 4 (M = Ni, Co) can be decisively modulated by the transition metal M(II)-ions.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2021
·Vol. 39
·期 10
·2801-2807
·
IF 6
Mengdi Zhang,Xiaofeng Lei,Yang Lv,Xizheng Liu,Yi Ding
Main observation and conclusion The application of lithium-ion batteries in cold climates has been hindered due to the decline in performance at low temperatures. The increased de-solvation energy and formation of Li dendrites at the anode surface emerge as the major challenges, which rely on the development of stable anode and compatible electrolytes. Herein, a self-healing GaInSn liquid metal (LM) based electrode coupled with a multi-solvent electrolyte is proposed toward reversible Li-storage at low temperatures. By using methyl butyrate (MB) as a co-solvent in 1 mol·L –1 LiTFSI of ethylene carbonate and diethyl carbonate, the electrolyte viscosity decreases from 52.07 to 13.75 mPa·s, while the ionic conductivity increases from 1.38 to 3.44 mS·cm –1 at –20 °C. Moreover, the Li/MXene@LM cells can display a discharge capacity of 500 mAh·g –1 , with capacity retention of 78% at –20 °C after 120 cycles. It is disclosed that a uniform LiF-rich solid electrolyte interface (SEI) layer on the anode is formed upon the addition of MB, which promotes the desolvation of Li ions at the interface of electrode/electrolyte especially at low temperatures. These results prove that MB as the co-solvent is well compatible with LM based anodes and holds great potential for the exploration of low-temperature energy devices.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 42
·2103214
·
IF 18.808
Xianbo Yu,Guangyu Zhao,Chao Liu,Canlong Wu,Huihuang Huang,Junjie He,Naiqing Zhang
Owing to the low-cost, dendrite-free formation, and high volumetric capacity, rechargeable Li + /Mg 2+ hybrid-ion batteries (LMIBs) have attracted great attention and are regarded as promising energy storage devices. However, due to the strong Coulombic interaction of Mg 2+ with host materials, the traditional “Daniell Type” LMIBs with only Li + intercalation usually cannot ensure a satisfactory energy density. Herein, graphene monolayers are arranged intercalating into MoS 2 interlamination to construct van der Waals heterostructures (MoS 2 /G VH). This operation transforms the construction of ion channels from pristine interlamination of two MoS 2 monolayers to the interlamination of MoS 2 monolayer with graphene monolayer, thereby greatly reducing ion diffusion energy barriers. Compared with pristine MoS 2 , the MoS 2 /G VH can obviously reduce the migration energy barriers of Li + (from 0.67 to 0.09 eV) and Mg 2+ (from 1.01 to 0.21 eV). Moreover, it is also demonstrated that MoS 2 /G VHs realize Li + /Mg 2+ co-intercalation even at a rate current of 1000 mA g −1 . As expected, the MoS 2 /G VH exhibits superior electrochemical performance with a reversible capacity of 145.8 mAh g −1 at 1000 mA g −1 after 2200 cycles, suggesting the feasibility of potential applications for high-performance energy storage devices.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2021
·
IF 7.991
Mohammed A. Al-Baadani,Kendrick Hii Ru Yie,Abdullrahman M. Al-Bishari,Bilal A. Alshobi,Zixin Zhou,Kai Fang,Binwei Dai,Yiding Shen,Jianfeng Ma,Jinsong Liu,Xinkun Shen
The rising popularity of co-electrospinning technique in the field of biomaterial has enabled the possibility of combining various polymers, in which they provide the mechanical properties and the bioactivity for each other. Herein, a series of polycaprolactone/gelatin (PCL/Gel) composite membranes were prepared by co-electrospinning, and their biocompatibility and drug-controlled release ability were evaluated in detail for the first time. The addition of Gel significantly enhanced the adhesion and differentiation of osteoblasts, while the addition of PCL significantly improved the mechanical properties. Moreover, the in vitro degradation and drug release results showed that by adjust the PCL fibers amount and size, the degradation of Gel and the release profile of hydrophilic drugs/proteins could be effectively controlled: in the low PCL groups (PCL/Gel-1 & PCL/Gel-4), the Gel nano-fibers dissolved rapidly, resulting in an early explosive release within 1 week; however, with the increase of PCL content, the drug release rate decreased gradually, and the total release period could be extended to over 2 weeks (PCL/Gel-2, PCL/Gel-3 & PCL/Gel-5) or more (PCL/Gel-6). Therefore, the preparation of a controllable drug delivery system with good biological activity by co-electrospinning of PCL and Gel could provide an effective strategy for bone regeneration.
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2021
·
IF 8.001
Naveed Ahmad,Xiaoxiao Wang,Peixu Sun,Ying Chen,Fahad Rehman,Jian Xu,Xia Xu
Electrocatalytic CO 2 reduction (ECO 2 R) is an environment-friendly way to convert CO 2 into profitable products. Amine solution recently has been employed as an electrolyte in ECO 2 R but suffers from low efficiency. Herein, aqueous solutions containing different amine-based deep eutectic solvents (DESs) were used as electrolytes for CO 2 reduction. The effect of different DESs on the CO 2 reduction was investigated at Ag, Cu, and Zn metal electrodes. Tafel and electrochemical impedance spectroscopy (EIS) were applied to understand the CO 2 reduction. DES in aqueous solution facilitates the CO 2 reduction to CO with higher faradaic efficiency of CO (FE CO ) than amine solutions and a mixture of hydrogen bond acceptor (HBA) and hydrogen bond donor (HBD). Both HBD and HBA have an influence on CO 2 reduction. [Monoethanolamine hydrochloride] [methyldiethanolamine] ([MEAHCl][MDEA]) gives high FE CO , 71% FE CO at −1.1 V vs RHE at Ag electrode, 33% higher than [MEAHCl][MEA]. Experimental results and EIS analysis reveal that the facilitation of CO 2 reduction to CO probably stems from a synergistic effect of nano-size agglomerate dispersion on Ag-surface, bicarbonate formation, exchange current density , and Cl − ions present in DESs. These findings present a feasible method to employ the aqueous MDEA-based DES solution as an electrolyte for CO 2 reduction.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2021
·
IF 3.995
Jun Liu,Meng Sun,Meng-Jie Chang,Wen-Na Cui,Cong-Miao Zhang,Fu-Rong Ni,Jing Zhang,Si-Meng Fan,Hui-Ling Du
s We present a simple methodology to construct novel Co-Pi decorated TiO 2 /Bi 4 Ti 3 O 12 nanorod (TiO 2 /BTO@Co-Pi NR) arrays as photoanode for enhanced water splitting. By using successive ionic layer adsorption and reaction (SILAR) method, controllable amounts of BiOI nanoplates were uniformly immobilized on the hydrothermal grown TiO 2 NR arrays on Fluorine-doped tin oxide (FTO) substrate. TiO 2 /BTO NR heterojunction was conveniently obtained by partial conversion of TiO 2 to high crystallized Bi 4 Ti 3 O 12 through a solid-state reaction with BiOI nanoplates at high temperature. Afterwards, Co-Pi nanoparticles were deposited on TiO 2 /BTO by photoelectrical deposition to generate TiO 2 /BTO@Co-Pi composites. Photoelectrochemical (PEC) measurements have demonstrated that the prepared TiO 2 /BTO photoanode exhibits extremely enhanced performance than pristine TiO 2 for PEC water splitting thanks to the increased visible light absorption and photogenerated charge separation efficiency. Moreover, both the photocurrent density and incident photo-to-current conversion efficiency (IPCE) were further improved after the decoration of Co-Pi. This work provides a feasible and low-cost strategy to establish TiO 2 /Bi 4 Ti 3 O 12 based photoelectrode, therefore, is suitable for practical applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Yajun Ji,Yanping Xie,Lingyun Zheng,Feiya Xu
Sulfate radical-based advanced oxidation technology has been considered one of the most effective methods to remove organic pollutants from water. In this study, porous Co-doped LaFeO 3 catalysts were synthesized by the sol-gel method and applied in peroxymonosulfate (PMS) activation for organic pollutants degradation. The effects of catalyst dosage, PMS concentration, initial pH of the solution and radical scavenger on the degradation of Acid Red G (ARG) were systematically studied. The porous LaFeO 3 showed higher specific surface area (27.62 m 2 /g) and pore volume (0.15 cm 3 /g) than the traditional LaFeO 3 (7.83 m 2 /g and 0.11 cm 3 /g), resulting in higher activity. After doping Co, more oxygen vacancies generated. The catalytic activity of LaFe 1-x Co x O 3 was remarkably enhanced. ARG could be completely degraded in LaFe 0.90 Co 0.10 O 3 /PMS system within 10 min. The degradation rate was 51 times higher than that in the porous LaFeO 3 /PMS system. The superior activity can be attributed to the oxygen vacancies and synergistic effect of Co and Fe, which facilitated the activation of PMS and generated SO 4 •- and HO•. It was SO 4 •- that mainly contributed to the degradation of ARG. The detailed degradation pathway was proposed, according to the intermediate products of ARG degradation. Besides, the degradation rate of ARG by the as-prepared catalyst exceeded 80% even after using for 5 times.
✓ 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）