Nature Communications
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2021
·Vol. 12
·期 1
·1-13
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IF 14.919
Ji Xixi,Lin Yanhong,Zeng Jie,Ren Zhonghua,Lin Zijia,Mu Yongbiao,Qiu Yejun,Yu Jie
Development of excellent and cheap electrocatalysts for water electrolysis is of great significance for application of hydrogen energy. Here, we show a highly efficient and stable oxygen evolution reaction (OER) catalyst with multilayer-stacked hybrid structure, in which vertical graphene nanosheets (VGSs), MoS 2 nanosheets, and layered FeCoNi hydroxides (FeCoNi(OH) x ) are successively grown on carbon fibers (CF/VGSs/MoS 2 /FeCoNi(OH) x ). The catalyst exhibits excellent OER performance with a low overpotential of 225 and 241 mV to attain 500 and 1000 mA cm −2 and small Tafel slope of 29.2 mV dec −1 . Theoretical calculation indicates that compositing of FeCoNi(OH) x with MoS 2 could generate favorable electronic structure and decrease the OER overpotential, promoting the electrocatalytic activity. An alkaline water electrolyzer is established using CF/VGSs/MoS 2 /FeCoNi(OH) x anode for overall water splitting, which generates a current density of 100 mA cm −2 at 1.59 V with excellent stability over 100 h. Our highly efficient catalysts have great prospect for water electrolysis.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 21
·3771
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IF 5.719
Shizhuo Wang,Jikang Jiang,Minyan Gu,Yuanbo Song,Jiang Zhao,Zheng Shen,Xuefei Zhou,Yalei Zhang
To substitute fossil resources, it is necessary to investigate the conversion of biomass into 1,2-propanediol (1,2-PDO) as a high-value-added chemical. The Pt/deAl-Beta@Mg(OH)2catalytic system is designed to obtain a higher 1,2-PDO production yield. The optimal yield of 1,2-PDO is 34.1%. The unique shell-core structure of the catalyst demonstrates stability, with a catalytic yield of over 30% after three times of use. The primary process path from glucose to 1,2-PDO, glucose-hexitol-1,2-PDO, is speculated by the experiments of intermediate product selectivity. The alkaline catalytic mechanism of the reaction process is elucidated by studying catalyst characterization and analyzing different time courses of products. The introduction of Mg(OH)2improves the target yield by promoting the isomerization from glucose to fructose and retro-aldol condensation (RAC) conversion, with pseudo-yield increases of 76.1% and 42.1%, respectively. By studying the processes of producing lactic acid and 1,2-PDO from glucose, the glucose hydrogenolysis flow chart is improved, which is of great significance for accurately controlling 1,2-PDO production in industrial applications. The metal, acid, and alkali synergistic catalytic system constructed in this paper can provide a theoretical basis and route reference for applying biomass conversion technology in practice.Keywords:1,2-propanediol;alkaline modification;core–shell catalyst
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JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Baolai Wang,Kaili Wei,Fuming Chen,Yinzhen Wang,Guannan He,Wei Li,Junming Liu,Qinyu He
It has been found it more difficult in completely degrading A-ring of tetracycline (TC) than completely degrading B-D rings of tetracycline. Thus, it is very necessary to find an effective route to completely degrading A-ring of tetracycline. In this work, a Z-scheme heterojuncted core-shell La(OH) 3 @BaTiO 3 composite (LB) was designed and fabricated through hydrothermal method . Many characterization techniques were employed to investigate the microstructure, phases, composition, energy band structure , and the lifetime of photogenerated carriers. In the mean time, the photocatalytic properties, including the degradation of A-ring and B-D rings of TC, as well as active species during photo-degradation were investigated. It is found that the as-prepared LB has an improved lifetime of photo-produced carriers, as well as high photocatalytic properties, being attributed to the core-shell structured heterojunction La(OH) 3 @BaTiO 3 . In addition, it is also found that ·O 2 − is more effective on degrading A-ring of TC than other active species, likely owed to the PKa3 value (3.3) of A-ring in TC. This work has supplied a route to completely degrading the A-ring of TC: rationally design and prepare a Z-scheme heterojuncted composites which supply very negative conduction band bottom potential.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Qing-Qing Pang,Xi-Zheng Fan,Sha-Sha Yi,Xin Du,Zhong-Yi Liu,Xin-Zheng Yue
The design of bifunctional catalysts with spatially separated active sites holds significance importance in achieving simultaneous electrooxidation and hydrogen evolution reaction (HER). Herein, a core-shell Re-Ni@Ni(OH) 2 /CC heterostructure is demonstrated for the electrocatalytic furfural oxidation reaction (FOR) coupled with HER. Experimental results and theoretical analyses reveal that Re not only modulates the heterointerface between Re-Ni core and Ni(OH) 2 shell, facilitating furfural (FF) adsorption at Ni(OH) 2 sites, but also regulates electronic structure of Ni. This leads to a negative shift in the d-band center from Fermi level, effectively weakening hydrogen adsorption at Ni sites in Re-Ni@Ni(OH) 2 heterostructure, thereby improving the HER process. As a result, the synthesized Re-Ni@Ni(OH) 2 /CC exhibits a low cell voltage of 1.40 V @10 mA cm −2 for the FOR||HER. This study highlights the importance of modulating metal’s electronic structure and identifying active sites, which has great potential for improving bifunctional electrocatalytic reactions.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Xiaoying Zhou,Shiyu Fang,Tiantian Zhang,Zuliang Wu,Jing Li,Wei Wang,Jiali Zhu,Junliang Wu,Daiqi Ye,Rui Han,Qingling Liu,Shuiliang Yao,Erhao Gao,Dayu Wu
The development of non-noble metal catalysts for low-temperature CO oxidation is a pivotal subject in various disciplines. In this study, an optimized Mn-doped NiO catalyst (Mn-NiO-0.5), prepared via aerosol pyrolysis with an equal molar ratio of Ni to Mn, demonstrates remarkable performance. It achieves an 82 % CO conversion at -20 °C and a 100 % conversion between 10 °C and 800 °C. The catalyst’s turnover frequency ( TOF ) for CO oxidation significantly surpasses that of previously reported noble-metal-based catalysts, underscoring its superior efficiency. Dynamic analyses suggest that the enhanced catalytic activity is a result of the unique atom burr structure, which presents an extensive surface area replete with abundant active sites. This structural feature is instrumental in maximizing the catalyst’s interaction with CO molecules. Experimental findings, corroborated by density functional theory (DFT) calculations, elucidate the mechanism of CO oxidation on the Mn-NiO-0.5 catalyst. The process is facilitated by the synergistic action of bimetallic sites, where the Ni–OH site acts as the primary adsorption point for CO. Subsequently, the CO is oxidized to bicarbonate through the interaction with the oxygen (O or O 2 ) at adjacent Mn sites. This pioneering study introduces a paradigm-shifting insight: the effectiveness of non-noble metal oxide catalysts can now compete with, and in some cases, outperform their noble metal counterparts. This breakthrough is set to transform the industry, presenting a compelling alternative to conventional noble metal catalysts and propelling the evolution of state-of-the-art environmental conservation technologies.
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Journal of Energy Storage
·
2025
·
IF 9.8
Rongjun Wu,Lisheng Deng,Linfa Xiao,Pei Lu,Shusen Lin,Noriyuki Kobayashi,Mitsuhiro Kubota,Chao Wang,Hongyu Huang,Xianglong Luo
Mg(OH) 2 /MgO-based thermochemical energy storage (TCES) has garnered significant interest for its potential in moderate-temperature long-term thermal energy storage, which is crucial for the stable and efficient utilization of solar energy, due to its high energy storage density, low cost, and non-toxicity. However, its practical applications are limited by agglomeration and sintering issues, which decrease the dehydration/hydration rate and reduce durability. This study focuses on designing a MgO-based composite structure by in-situ casting MgO nanoparticles within the pores of nanoporous carbon (NC). The composites were synthesized by a calcination method. Their TCES performances were tested using a thermogravimetric analysis. The NC, with an average pore size of 14.1 nm, effectively confined the growth of MgO particles within its pores, thereby producing MgO particles with small size and uniform dispersion while maintaining a high proportion of MgO in the composite. Consequently, the composite demonstrated the fastest hydration, achieving a 98.7 % conversion ratio, which was 58.9 % higher than that of pure MgO. Meanwhile, the composite exhibited a high dehydration rate and a large heat storage density of 946.5 kJ/kg. Importantly, the composite showed excellent structural stability and exhibited good durability over 60 cycles, with a slight decrease (6.0 %) in heat storage density, whereas pure MgO showed a decrease of 63.1 %. The high energy storage density and superior durability of the developed composite, compared to existing Mg(OH) 2 /MgO-based materials, make it a promising candidate for TCES applications. This study offers a reference for the rational design of TCES materials with agglomeration inhibition and reaction activity.
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CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Yabo Guo,Zhihao Feng,Jiangyi Guo,Lu-Hua Zhang,Fengshou Yu
Electrochemical nitrate reduction reaction (NO 3 RR) is an energy efficient and environmentally friendly technology that removes nitrate compounds from wastewater while producing ammonia as a value-added product. NO 2 − is a crucial intermediate in the electrocatalytic NO 3 RR, and regulating the intermediate adsorption structure is the key to improve the reaction efficiency. However, stabilizing the reaction intermediates by optimizing the catalyst structure remains a great challenge. Herein, We demonstrate copper phthalocyanine (CuPc) anchored on a Mg(OH) 2 -decorated nitrogen-doped carbon composite as an efficient electrocatalyst for NO 3 RR, achieving ambient conditions ammonia synthesis in neutral electrolytes. The incorporation of Mg(OH) 2 induces interfacial electron transfer, creating a charge-redistributed Cu active site that facilitates the adsorption of NO 3 − and reaction intermediates. Moreover, the Mg 2+ sites with negative electrostatic potential (ESP) interact with the oxygen sites exhibiting positive ESP on the critical NO 3 RR intermediate, thereby optimizing the adsorption geometry while enhancing both the stability of the intermediate and its subsequent catalytic conversion. When used for electrochemical NO 3 − reduction reaction (NO 3 RR), the developed CuPc/Mg(OH) 2 /NC exhibits a prominent Faradaic efficiency for NH 3 formation (FE NH3 ) of 98.09 % and NH 3 yield of 12.632 mg h −1 cm −2 .
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Luyao Shi,Qinyuan Yu,Ziqi Guo,Xuedong Wei
The composite electrocatalyst of Ni(OH)₂@Fe-BDC@ Fe 3 O 4 /NF was successfully prepared. • The Ni(OH)₂@Fe-BDC heterostructure and dispersed Fe 3 O 4 nanoparticles optimize electron transfer pathways. • It is outstanding catalyst with the overpotential of 149 mV at 10 mA·cm⁻². • It has durable OER life with nearly 100 h under initial 110 mA·cm −2 . • It possesses equally excellent HER and overall water splitting performance. Metal-organic frameworks (MOFs) have gradually become highly promising electrocatalytic materials applied in the reaction of oxygen evolution (OER), thanks to their extraordinarily high specific surface area, adjustable pore structure as well as ample redox active sites. However, their practical applications are hindered by intrinsically low electrical conductivity and inadequate cycling stability. The present research introduces a brand-new Ni(OH) 2 @Fe-BDC@Fe 3 O 4 /NF nanocomposite electrocatalyst that was successfully prepared via a stepwise solvothermal method on a Ni foam (NF) support. Systematic structural characterizations confirmed that Ni(OH) 2 nanosheets in the composite exists as a mixture structure of honeycomb-like and flower-cluster-like, which uniformly anchored at the surface of Fe-BDC@Fe 3 O 4 /NF. Moreover, the coexistence of Ni(OH) 2 , Fe-BDC and Fe 3 O 4 three phases was verified in the composite. And Fe 3 O 4 nanoparticles are evenly dispersed in Fe-BDC crystal nanolayers. Electrochemical tests in 1 mol/L KOH alkaline electrolyte demonstrated that the Ni(OH) 2 @Fe-BDC@Fe 3 O 4 /NF composite exhibited superior OER catalytic activity and complete hydrolysis performance compared with the single-component Ni(OH) 2 /NF and Fe-BDC@Fe 3 O 4 /NF, delivering an overpotential as low as 149 mV under a current density of 10 mA·cm −2 , alongside a full water decomposition voltage of 1.53 V at 50 mA·cm −2 . The improved performance stemmed from the strong interfacial electronic interaction between Ni(OH) 2 and Fe-BDC@Fe 3 O 4 , which induced a negative shift in the binding energies of Ni 2p and Fe 2p, increased the interfacial charge density, reduced the charge transfer resistance (Rct = 0.8 Ω) and enlarged the electrochemical specific surface area (ECSA). In addition, the composite showed excellent long-term durability, with only 8.30% activity decay following 100 h of non-stop chronoamperometry testing under initial current density of about 110 mA·cm −2 . Structural evolution analysis after the stability test revealed that the Fe 3 O 4 phase underwent reductive decomposition and in-situ reconstruction with Ni(OH) 2 to form amorphous Ni- Fe oxyhydroxide, which served as the real active sites. This research offers a feasible approach for the structural design of iron-based MOF composite electrocatalysts, deepens the understanding of the role of interfacial synergetic mechanism between metal hydroxides and MOFs in improving OER performance, and offers experimental evidence for the advancement of high-performance non-noble metal electrocatalysts applied in water electrolysis. Download: Download high-res image (202KB) Download: Download full-size image
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COMPOSITES COMMUNICATIONS
·
2026
·
IF 8.6
Tian Fang,Jiujun Zhu,Qixiong Zhang,Xiaopeng Li,Yafei Hou,Renlu Han,Jing Cuan,Weiping Li
Polymer dielectric capacitors are pivotal for advanced electronics, while their limited energy density ( U d ) impedes further miniaturization. Constrcution of nanocomposites to utilizing their both merits seems to improve their U d , however, conventional single-filler systems typically enhance either dielectric constant ( ε r ) or breakdown strength ( E b ), at the expense of the other. Herein,A dual-filler approach is developed to achieve concurrent enhancement of ε r and E b , thereby overcoming the trade-off limitation inherent in single-filler systems. In this study, a series of nanocomposites are designed by incorporating carbon quantum dots (C QDs) into a P(VDF-HFP) matrix with Ni(OH) 2 nanosheets (Ni(OH) 2 NSs). C QDs enhance ε r through the micro-capacitor effect and suppress electron migration via the Coulomb blockade effect. Concurrently, Ni(OH) 2 NSs act as scattering centers and barriers, extending the breakdown path to improve E b . Simulation results confirm synergistic suppression of electrical tree growth. The best nanocomposite obtains a U d of 21.9 J/cm 3 at 570.3 MV/m with charge-discharge efficiency ( η ) of 72.3%. This U d shows a 188% improvement over the single-filler counterpart. Meanwhile, excellent cyclic stability over 10 4 cycles and rapid discharge (τ 0.9 = 117 ns) are also demonstrated. This dual-filler system provides a rational route to concurrently improve ε r and E b for next-generation dielectric capacitors.
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POLYMER COMPOSITES
·
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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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9
Guoqiang Li,Runze Liu,Miaoqing Yang,Yiwei Zhao,Yimin Zhu,Lingen Wang,Long Huang,Yingke Fang,Yuan Li,Huiying Yang,Hongbin Xu
The persistent presence of recalcitrant micropollutants in aquatic environments poses significant environmental challenges. In this study, a porous polytetrafluoroethylene (PTFE) membrane was used to divide the traditional single-chamber Electro-peroxone (EP) process into a dual-chamber configuration (M/EP), and its pollutant degradation performance was systematically investigated. For ibuprofen (IBP) degradation, the M/EP process achieved a kinetic rate constant ( k obs ) of 0.215 min −1 , which is markedly higher than those of the EP process (0.133 min −1 ) under the high alkaline conditions. This can be attributed to the fact that the •OH concentration generated in the M/EP process was 2 times higher than that in the EP process at initial pH 11. Quenching experiments revealed that •OH contributed the most to IBP degradation among the ROS. Meanwhile, the PTFE membrane prevents H 2 O 2 migration and oxidation at the anode, resulting in 3 times higher H 2 O 2 concentration in the cathodic chamber compared with the EP process. The k obs for the degradation of electron-deficient compounds was enhanced by 2.6–3.3 times compared to the EP process, while moderate improvements were also observed for neutral (1.7×) and electron-rich (1.15×) pollutants, along with a notable reduction in EE/O. Furthermore, degradation byproducts were identified via LC-MS to propose potential degradation pathways, and their toxicity was assessed. These findings demonstrate that the M/EP process offers a promising strategy for the degradation of trace organic micropollutants from water.
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JOURNAL OF MOLECULAR STRUCTURE
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2026
·
IF 4.9
Di-Ming Chen,Yu-Ting Shi,Xue-Jing Zhang,Shao-Ming Fang
A robust Al-MOF built from octanuclear [Al 8 (μ 2 -OH) 8 (COO) 12 ] clusters with oxygen-rich 1D channels has been prepared. • It exhibits a high C₂H₆ uptake of 147.6 cm 3 /g and an IAST selectivity of 1.69 for equimolar C 2 H 6 /C 2 H 4 at 298 K and 1 bar. • The separation potential (ΔQ = 1.42 mmol/g) outperforms many reported Al-MOFs, reflecting a balanced capacity–selectivity trade-off. • Combined GCMC, DFT, and MD simulations reveal that multiple C–H···O contacts and greater charge transfer govern the ethane preference. The separation of ethane (C 2 H 6 ) from ethylene (C 2 H 4 ) represents a critically important yet highly challenging process in the petrochemical industry, as these two hydrocarbons possess nearly identical molecular sizes and boiling points. In this work, we report the C 2 H 6 adsorption and separation performance of a three-dimensional aluminum-based metal–organic framework (Al-MOF) constructed from octanuclear aluminum clusters and a tricarboxylate linker, featuring one-dimensional channels decorated with abundant strongly electronegative oxygen atoms originating from coordinated formate groups and μ 3 -OH moieties. The presence of these electron-rich oxygen sites creates a polar pore environment that establishes multiple C–H···O short interactions with C 2 H 6 molecules, thereby imparting a distinct recognition preference toward the paraffin over the olefin. Upon activation, the material exhibits a C 2 H 6 adsorption capacity of 147.6 cm 3 /g at 298 K and 1 bar. The ideal adsorbed solution theory (IAST) selectivity for an C 2 H 6 /C 2 H 4 (10/90) mixture reaches 1.69 at 298 K and 1 bar. Furthermore, the separation potential (Δ Q ), which integrates both adsorption capacity and selectivity, is determined to be 1.42 mmol/g, indicating a well-balanced performance profile. The different adsorption performance of 1a toward C 2 H 6 /C 2 H 4 was thoroughly studied via a combination of GCMC, DFT and MD calculations, which demonstrates that deliberate introduction of electron-rich oxygen functionalities into the pore walls of Al-MOFs represents an effective strategy for enhancing ethane-selective adsorption, positioning the present material as a competitive candidate for energy-efficient ethylene purification. Graphical -Synopsis A robust Al-MOF with octanuclear clusters and oxygen-rich pore walls was synthesized for C 2 H 6 /C 2 H 4 separation. It exhibits preferential C₂H₆ adsorption (147.6 cm 3 /g at 298 K, 1 bar), an IAST selectivity of 1.69 for equimolar mixtures, and a separation potential of 1.42 mmol/g. Combined GCMC, DFT, and MD simulations reveal that stronger C–H···O hydrogen bonding and greater charge difference lead to a more favorable host–guest interaction energy (–1.34 vs. –1.27 eV) for ethane. This work demonstrates that engineering electronegative oxygen sites in Al-MOFs is an effective strategy for energy-efficient ethylene purification. Graphical -Pictogram Download: Download high-res image (322KB) Download: Download full-size image
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