JOURNAL OF SOLID STATE CHEMISTRY
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2024
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IF 3.2
Hao Sun,Jingyi Yu,Cong Zheng,Sumei Wu,Tingting Yao,Zhiqiang Li,Nan Wang,Cunlei Zou,Weiwei Jiang,Hualin Wang,Shimin Liu,Chaoqian Liu,Wanyu Ding,Jiliang Zhang,Chuang Dong
Mg–Co–Ni–Cu–Zn–O is the firstly reported high entropy oxide (HEO) which has great promise in optoelectrical applications. However, the multicomponent and decreased configurational entropy by extracting one element from (Mg, Co, Ni, Cu, Zn) makes it difficult to synthesize single-phase medium entropy oxides (MEOs) especially when the cations are non-equimolar. In this paper, we synthesized different compositional-type of non-equimolar Co–Ni–Cu–Zn–O MEOs possessing single-phase rocksalt structure guided by the cluster-plus-glue-atom model. Interestingly, Co 21 Ni 43 Cu 16 Zn 16 O 96 and Co 17 Ni 47 Cu 16 Zn 16 O 96 have the lowest single-phase formation temperature (850 °C) when the total cation content is kept unchanged. Further increase or decrease of Co/Ni content (none, little, more) will increase the difficulty of single-phase formation ability and temperature (900–1200 °C). It is suggested the single-phase formation ability of Co–Ni–Cu–Zn–O MEOs is closely related to the Gibbs free energy ( ΔG ) and average cation-size difference ( δ ). The linear decrease of Co content and increase of Ni content can monotonously enlarge the energy band gap ( E g ) from 1.52 eV to 1.93 eV and increase the electrical impedance with five orders of magnitude (∼10 3 Ω–∼10 8 Ω), which may be valuable in the fields of optoelectrical devices.
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高影响因子
Journal of Materials Chemistry A
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2025
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IF 9.5
Yangxin Bai,Jiaxin Lu,Yanli Qi,Yitian Shao,Ran Xie,Xiaodong Wu,Xiaodong Shen,Sheng Cui,Zhanwu Wu
The development of cost-effective and highly active electrocatalysts for the oxygen evolution reaction (OER) is essential for advancing clean energy and energy storage systems. Herein, we prepared a novel Zn-promoted FeCo alloy anchored on an N-doped carbon aerogel (Zn-FeCo@NCA) derived from cellulose aerogel as an efficient and stable electrocatalyst using high-temperature carbothermal reduction. This process provides a solution to the problem of limiting the industrialization of metal aerogels by employing traditional chemical reductants and enhances cost-effectiveness due to the use of non-precious metals. The Zn-FeCo@NCA aerogel displays excellent OER activity with a low overpotential of 270 mV (10 mA cm−2) and a high mass activity of 0.429 A mg−1, surpassing most commercial precious metal catalysts. Electrochemical in situ Raman spectroscopy indicates that Zn-FeCo@NCA undergoes self-reconfiguration during the OER to form CoOOH as a truly catalytically active species. Moreover, density functional theory (DFT) calculations further demonstrate that this modulated electronic structure favors the reduction of the adsorption energy of the intermediate O*, thereby accelerating the electron transfer kinetics and enhancing the OER activity. When integrated into an anion-exchange membrane water electrolyzer (AEMWE), the Zn-FeCo@NCA anode achieves a current density of 1000 mA cm−2 at 2.18 V per cell, outperforming commercial RuO2. In conclusion, benefiting from the optimized electronic interactions between Zn-promoted FeCo alloys and N-doped carbon aerogels, as well as the “pearl-like” hierarchical structure, large specific surface area, and high electrical conductivity, Zn-FeCo@NCA is expected to be an ideal candidate for the anode of AEMWEs.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2026
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IF 3.9
Qiyuan Zheng,Shengxi Wu,Qinggang Li,Mingyu Wang,Wenjuan Guan,Zuoying Cao,Guiqing Zhang
Developing a novel extraction process for battery minerals-nickel laterites is a key aspect of building a resilient and low-carbon future, as the current process produces heavy metal residues, electrolytic wastewater, and toxic gases, while also facing issues of long process flow and low resource utilization. The primary bottlenecks in the process stem from the low separation coefficients and poor selectivity of commercial extractants. In this paper, a novel synergistic solvent extraction (SSX) system, dinonylnaphthalenesulfonic acid (DNNSA)-N,N-bis(pyridin-2-ylmethyl)tetradecan-1-amine (NNPA), has been proposed to address the bottlenecks. Based on the DNNSA-NNPA SSX system, a novel hydrometallurgical process has been proposed for the stepwise extraction of valuable metals from nickel laterites. In the proposed process, Cu, Ni, Co, and Zn were directly extracted from the nickel laterite leachate, reducing their concentrations to below 1 mg/L. The enriched metals were subsequently separated as CuSO4, NiSO4, CoSO4, and ZnSO4 solutions, each with a purity exceeding 99.9%. Thereafter, Cr, Fe(III), and Al were sequentially removed from the raffinate through stepwise precipitation, achieving their preliminary separation. Mn was then selectively extracted from the resulting precipitate–mother liquor, yielding a high-purity MnSO4 solution (>99.9%). This integrated approach enables the comprehensive resource extraction of nickel laterites. Systematic mechanistic studies and pilot plant tests demonstrate that the novel extraction process significantly improves metal ion separation coefficients, avoids coprecipitation losses of Ni and Co, simplifies the process flow, avoids hazardous waste generation, reduces energy consumption, and improves resource utilization.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Wenhao Xi,Xia Chen,Tongchen Wu,Jun Pan,Changrong Xia,Zhaopeng Qi,Bizhou Lin
N doped hollow carbon polyhedron with abundant meso- and macropores was in situ constructed. • The metal anchoring effect led to N doped hollow carbon supported MnO/CoMn 2 O 4 heterojunction nanoparticles. • MnO/CoMn 2 O 4 @HNC exhibits an excellent bifunctional activities with a Δ E = 0.711 V. • The battery has a peak power density of 168.6 mW cm −2 and a capacity of 788 mAh g −1 . Because of the sluggish kinetics of oxygen reduction/evolution reaction (ORR/OER) occurring at the air cathode, it is critical to develop efficient and sustainable bifunctional oxygen electrocatalysts for enhancing the real performance of Zn-air batteries (ZABs). Herein, we report a facile strategy to prepare MnO/CoMn 2 O 4 heterojunction nanoparticles embedded in N-doped hollow carbon polyhedron (MnO/CoMn 2 O 4 @HNC) through the metal anchoring effect. On the one hand, abundant meso- and macropores of the obtained MnO/CoMn 2 O 4 @HNC provide transport channels for oxygen molecules and reaction intermediates in the electrocatalytic process. On the other hand, density functional theory (DFT) calculations disclose that the interface coupling between MnO and CoMn 2 O 4 can facilitate electron transfer, and efficaciously reduce the energy barriers of rate determining steps (RDS) for ORR and OER. Owing to the advantages of structure and composition, MnO/CoMn 2 O 4 @HNC displays excellent electrocatalytic activity with a half-wave potential ( E 1/2 ) of 0.85 V for ORR and a potential of 1.561 V at 10 mA cm −2 for OER. The homemade ZABs driven by MnO/CoMn 2 O 4 @HNC perform a high power density of 168.6 mW cm −2 and a superb cycling stability (600 cycles). This work affords a promising route for in situ construction of non-precious metal bifunctional electrocatalysts with a novel structure toward ZABs. Download: Download high-res image (186KB) Download: Download full-size image
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Wei Deng,Kun Xiong,Nina Ge,Miao Yu,Lin Chen,Jun Wang
For efficient removal of the residual tetracycline (TC) in the aquatic environment, a novel cobalt (Co) and titanium (Ti) co-doped zinc ferrite (CoTiZFO) film was prepared via the Langmuir-Blodgett (LB) method in this study. With the co-doping of Co and Ti, the interfacial photoelectrocatalytic (PEC) activities for degradation of TC by the LB-assembled CoTiZFO (LB-CoTiZFO) films were significantly improved. As the applied voltage was 0.6 V in a two-electrode system, the five-layered LB-CoTiZFO (LB-CoTiZFO-5) films exhibited the optimal TC degradation rate and mineralization rate, which were accordingly 92.85% ± 1.45% and 81.92% ± 0.26%. In the same case, the kinetic rate constant ( k ) for PEC degradation of TC by the LB-CoTiZFO-5 films is equivalent to 3.3-fold of that by the films without the co-doping of Co and Ti. Under the PEC circumstances, the Co 3+ and Ti 4+ in the LB-CoTiZFO-5 film would be reduced to Co 2+ and Ti 3+ , while the Fe 2+ was oxidized to Fe 3+ , which results in the surface rearrangement of the LB-CoTiZFO-5 film. In addition, the Density Functional Theory (DFT) calculation results manifest the covalency competition in the Zn-O-Fe backbone can lead to the Fe-O bond breakage, the bare Fe metals with unpaired valence electrons will diffuse to the Helmholtz layer and serve as active sites, which endows the LB-CoTiZFO-5 films with boosted interfacial PEC activities. Therefore, the LB-CoTiZFO-5 film photoanode shows great prospective in efficient PEC degradation of TC.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Yukun Yuan,Jingfeng Gao,Zhiqi Wang,Liqin Zeng,Hongxin Xu,Xiaoyu Fu,Yifan Zhao
Zn(II) and dialkyldimethyl ammonium compounds (DADMAC) are common heavy metal and disinfectant contaminants in wastewater treatment plants. The response of sulfur autotrophic denitrification (SAD) system under single and joint stress with different concentrations of Zn(II) (1–25 mg/L) and DADMAC (0.2–10 mg/L) was evaluated using sequencing batch fixed-bed biofilm reactors in this study. The joint stress of high concentrations of Zn(II) and DADMAC had stronger inhibitory effects on microbial activity and metabolic function genes compared to the single stress, thus significantly inhibiting the performance of the SAD system. Furthermore, Zn(II) stress contributed to the proliferation of resistance genes (RGs) in water (w-RGs), whereas stress of DADMAC was able to induce the proliferation of intracellular RGs (si-RGs) and extracellular RGs (se-RGs) in sludge. And under the joint stress of Zn(II) and DADAMC, the abundances of si/se-RGs were much higher than that under single stress, with a higher risk of RGs transmission. The α-Helix/(β-sheet + random coil) in tightly bound extracellular polymeric substances correlated positively with si- tnpA-04 and se- tnpA-04 . Horizontal gene transfer via mobile genetic elements was the main mode of RGs transmission. This work assessed the risk of DADAMC and Zn(II) in the SAD system and established new insights into the transmission of three-fraction RGs under DADMAC and Zn(II) stress.
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高影响因子
ENERGY & FUELS
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2024
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IF 5.2
Wenhao Xi,Pan Wang,Tongchen Wu,Qianqian Hou,Bifen Gao,Yilin Chen,Peide Liu,Bizhou Lin
Porous transition metal-based nitrogen-doped carbon materials are considered promising bifunctional electrocatalysts for the oxygen reduction reaction/oxygen evolution reaction (ORR/OER) to improve the practical performance of rechargeable metal–air batteries. In this work, utilizing the sealing effect of a molten salt, defect-rich N-doped carbon supported embedded Co nanoparticles (NPs) with a unique two-dimensional/three-dimensional (2D/3D) cross-linked structure (Co@CLNC) was fabricated by a facile one-pot salt-assisted pyrolysis of a cobalt-based zeolite imidazole framework. Density functional theory (DFT) calculations revealed that the synergistic effect of Co NPs boosts the catalytic activity of Co–Nx active sites through reducing the energy barriers of the rate-determining steps, the desorption of *OH for the ORR and the transformation of *OH to *O for the OER. The as-prepared Co@CLNC manifests a larger specific surface area and remarkable OER/ORR bifunctional electrocatalytic activity with a high ORR half-wave potential of 0.84 V. A homemade Zn–air battery using Co@CLNC as the air electrode catalyst demonstrates excellent performance with a high open-circuit voltage of 1.526 V, a peak power density of 166 mW cm–2, and a high energy efficiency of greater than 59.8%, with a low charging voltage of less than 2 V during the 600-cycle stability test.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
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2025
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IF 17.7
Pengkun Zhang,Qinhan Wu,Haoyu Wang,Dong-Hau Kuo,Yujie Lai,Dongfang Lu,Jiqing Li,Jinguo Lin,Zhanhui Yuan,Xiaoyun Chen
Herein, we established a Zn 3 (OH) 2 (V 2 O 7 )(H 2 O) 2 /V-Zn(O,S) Z-scheme heterojunction (labeled ZnVO/V-Zn(O,S) with a heterovalent V 4+ /V 5+ states and oxygen vacancies in both phases via a one-step in-situ hydrolysis method. The NaBH 4 regulated the ZnVO/V-Zn(O,S)-3 with rich Vo and suitable n (V 4+ )/ n (V 5+ ) ratio achieved an excellent photocatalytic nitrogen fixation activity of 301.7 μmol/(g·h) and apparent quantum efficiency of 1.148% at 420 nm without any sacrificial agent, which is 11 times than that of V-Zn(O,S). The Vo acts as the active site to trap and activate N 2 molecules and to trap and activate H 2 O to produce the H for N 2 molecules photocatalytic reduction. The rich Vo defects can also reduce the competitive adsorption of H 2 O and N 2 molecules on the surface active site of the catalyst. The heterovalent vanadium states act as the photogenerated electrons, quickly hopping between V 4+ and V 5+ to transfer for the photocatalytic N 2 reduction reaction. Additionally, the Z-scheme heterojunction effectively minimizes photogenerated carrier recombination. These synergistic effects collectively boost the photocatalytic nitrogen fixation activity. This study provides a practical method for designing Z-scheme heterojunctions for efficient photocatalytic N 2 fixation under mild conditions.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
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IF 19
Xian Tong,Yue Han,Li Zhu,Runqi Zhou,Zhiqiang Lin,Hongning Wang,Shengbin Huang,Yuncang Li,Jianfeng Ma,Cuie Wen,Jixing Lin
Zinc (Zn) and its alloys have recently gained research interest due to their good biosafety, biological function, biodegradability, and formability. Zinc-phosphate (ZnP) coating has been shown to improve the corrosion resistance and biocompatibility of Zn alloys. Here, a biodegradable ZnP-coating on Zn 1Cu 0.1Ti (ZCT) membrane with high strength-ductility and mechanical stability, suitable degradation rate, effective antibacterial ability, excellent in vitro and in vivo cytocompatibility, and osteogenesis is reported. The ZnP-coated ZCT exhibits high strength-ductility with a yield strength of 264 MPa, ultimate tensile strength of 312 MPa, elongation of 36.0%, and high mechanical stability before and after 30 d immersion in Hanks’ and AS solutions, all of which are higher than those of ZCT. The ZnP coating shows good deformation resistance, healing effect, and bond strength with the substrate, meeting the clinical contour shaping requirements. The ZnP-coated ZCT membrane sample shows higher cell viability toward MC3T3-E1 and MG-63 cells, osteogenic and mitochondrial quality-control properties in vitro than those of the ZCT sample. Using a rat calvarial defect model, the ZnP-coated ZCT membrane shows complete biosafety and considerable osteogenesis performance. Overall, the ZnP-coated ZCT membrane is recommended as a promising biodegradable implant material for oral guided bone regeneration application.
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高影响因子
MOLECULES
·
2020
·Vol. 26
·期 1
·109
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IF 3.267
Hong-Juan Liu,Rui Yi,Dong-Mei Chen,Chao Huang,Bi-Xue Zhu
Four complexes, [Cu4L2(OCH3)2(CH3OH)2]·2H2O (1), [Zn2L2Cl4]·2H2O·2CH3OH (2), [Hg2L2Br4]·4CH3OH (3), and {[CdL2Cl2]·4H2O·4CH3OH}n(4), have been synthesized and characterized from a bis(pyridylhydrazone) ligand (L) with copper(II), zinc(II), mercury(II) or cadmium(II), respectively. Complex1exists as a centrosymmetric tetranuclear dimer withLas deprotonated tridentate ligand. Complexes2and3exist as centrosymmetric metallamacrocycles withLas bidentate ligand. Complex4exists as a 1D looped-chain coordination polymer. The thermal stabilities and vapor adsorption properties of the four complexes were investigated as well.Keywords:pyridylhydrazone;complex;crystal structure;vapor adsorption
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Bo Wang,Qiao Liu,Ao Yuan,Qing Shi,Lan Jiang,Weiyou Yang,Tao Yang,Xinmei Hou
One key step for advancing the widespread practical application of rechargeable metal-air batteries and water electrolysis fundamentally relies on the development of cost-effective multifunctional electrocatalysts toward oxygen and hydrogen-involving reactions. The present work initiates a tofu-derived one-pot strategy for green, facile, and mass production of highly active and stable catalyst toward oxygen reduction/evolution and hydrogen evolution reactions, through the preparation of Fe/Co cross-linked tofu gel and the subsequent pyrolysis. Despite the free use of additional N/P precursors or pore-forming agents, the as-prepared materials comprise highly dispersive FeCo-rich phosphides nanoparticles and porous N,P co-doped carbon network inherited from the tofu skeleton. The resultant catalysts exhibit remarkably enhanced trifunctional activities as compared to the Fe 2 P and Co 2 P counterparts, along with better long-term stabilities than the benchmark RuO 2 and Pt/C catalysts. Accordingly, the as-assembled Zn-air battery delivers a large power density (174 mW cm −2 ) with excellent cycle stability (the gap of charge/discharge voltage@10 mA cm −2 increases by 0.01 V after 720 h of operation, vs . 0.16 V of Pt/C-RuO 2 based battery after 378 h). Furthermore, the as-constructed alkaline electrolyzer just requires a small voltage of 1.55 V@10 mA cm −2 , which outperforms nearly all of those of biomass-derived electrocatalysts ever reported, and that of noble metal catalysts-based electrolyzers (1.72 V@10 mA cm −2 for Pt/C-RuO 2 ), underscoring their bright future toward commercial applications in green energy conversion devices.
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高影响因子
Biomaterials Advances
·
2022
·
IF 0
Xiaohao Sun,Xiao Yu,Wei Li,Minfang Chen,Debao Liu
Metal matrix composites have been recognized as a feasible approach to obtain a new generation of biodegradable Zn-based material. Nevertheless, there is a great challenge in achieving good dispersion properties of the bioactive reinforcements within zinc matrix. A novel and facile approach, namely graphene oxide (GO)-assisted hetero-aggregation, were developed to achieve uniformly dispersed nanoceramics in the Zn matrix, by using very low-content (0.03 vol%) GO as a linker between the Zn matrix and reinforcement. The negatively-charged GO becomes a suitable “bridge” connected the positively-charged metallic powder and bioactive reinforcement by charge neutralization in polarity solvent. Three kinds of reinforcements, including MgO , ZnO and CuO, were used to verify the feasibility of the above-mentioned method. As-sintered 3CuO/Zn matrix composites , which possessed uniformly distributed reinforcement, uniaxial compressive strength of 301.2 MPa, failure strain over 40%, moderate corrosion rate of 0.063 mm·y −1 , acceptable cytocompatibility and antibacterial property , should be a useful material for orthopedic applications .
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