ACTA MATERIALIA
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2026
·
IF 9.3
Ka Wang,Qirui Wei,Ruilin Guan,Zhigang Zhang,Jiawei Zhang,Hengdong Ren,Wenqing Wei,Yuxiang Yan,Haizeng Song,Jingyi Han,Peng Zhan,Xianghong Niu,Shancheng Yan,Xinglong Wu
High-efficiency and low-cost oxygen evolution reaction (OER) catalysts are essential for advancing water electrolysis technologies. Transition metal thiophosphates (TMPSs) have garnered considerable interest in the OER field due to their ability to modulate the electronic states of active atoms through surface defect engineering. In this study, monolayer theoretical calculations reveal that the interaction between adjacent single-double sulfur vacancies (S-DSVs) significantly alters the electronic structure of phosphorus atoms, thereby tuning the binding strength with reaction intermediates and effectively lowering the energy barrier of the rate-determining step. As a result, S-DSVs outperform isolated single sulfur vacancies (SSVs) and double sulfur vacancies (DSVs). Single-layer FeNiP 2 S 6-x (SL-FeNiP 2 S 6-x ) catalysts with uniformly distributed S-DSVs were successfully synthesized via a mild and selective etching process using B(OH) 3 . Electrochemical measurements demonstrate that SL-FeNiP 2 S 6-x with an optimized S-DSV concentration delivers excellent OER performance, achieving a low overpotential of 171 mV at 10 mA cm -2 and a Tafel slope of 38 mV dec ‑1 in 1 M KOH—surpassing most reported iron/nickel-based OER catalysts. This work introduces a novel strategy for enhancing electrocatalytic activity by precisely controlling the position and distribution of sulfur vacancies through controllable etching.
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ENERGY
·
2026
·
IF 9.4
Hui Wan,Chen-Xiang Zhang,Chen-Le Peng,Jian-Hang Nie,Ming-Hua Xian,Zi-Xuan Yang,Lei Li,Yang Liu,Zhen Peng,Shi-Yan Ning,Guang-Dong Liu,Han Chen,Gui-Fang Huang,Wei-Qing Huang
Crystalline-amorphous heterointerfaces, enriched with unsaturated coordination sites and tunable electronic structures, hold great potential for accelerating the hydrogen evolution reaction (HER). However, conventional synthesis strategies provide little control over their density and spatial distribution. Here, by tailoring the Fe composition in NiFe x P, we achieve dynamic phase evolution that drives extensive dissolution-redeposition of Fe 2 P domains, producing dense defect-rich, sub-nanometer amorphous NiFeOOH on NiFe x P (NiFeOOH@NiFe x P). This process enables precise regulation of interface density and establishes intimate crystalline-amorphous junctions. Density functional theory calculations reveal that such interfaces synergistically activate a dual-pathway mechanism: amorphous NiFeOOH reduces the water dissociation barrier to 0.834 eV, while crystalline NiFe x P weakens H* binding via d-band modulation, jointly overcoming the kinetic bottleneck. As a result, the activated NiFeOOH@NiFe 0.2 P catalyst exhibits an ultralow overpotential (only 20 mV at 10 mA cm -2 ), a low Tafel slope of 35.86 mV dec -1 , and remarkable durability (20 mA cm -2 for over 60 h). This work highlights interface-density engineering as a powerful route to break the kinetic bottleneck of alkaline HER.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Feng Xu,Hongjian Zhang,Edison Huixiang Ang,Yisha Wang,Tianyang Cui,Yufei Lu,Zhentao Nie,Haoyang Wang,Wei Yang,Jixin Zhu
Porous silica-based ceramics (PSCs) are widely utilized in diverse fields such as 5G smart devices, biomedicine, insulation, catalysis, and energy storage. Traditional methods for producing PSCs, such as sol-gel processes, sacrificial templates, chemical foaming, and solution spinning, are hampered by high temperatures, lengthy procedures, and complex steps, leading to significant energy consumption and environmental pollution. A novel Joule carbothermal chemistry technique has been developed for the rapid synthesis of porous ceramics materials, creating high-quality PSCs within 20 s. The intrinsic mechanisms of in-situ structural evolution and porosity formation were thoroughly studied. The resulting PSCs demonstrate exceptional thermal insulation properties, forming an effective thermal barrier that maintained a backside temperature as low as 63 °C when the front side was exposed to a 1300 °C flame. Additionally, various application scenarios for these PSCs are highlighted, notably improving the fire resistance and thermal insulation of lithium-ion batteries, thus paving the way for expanded ceramic production and broader applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Shujing Zhao,Guoshun Gao,Wenjia Long,Jiyan Wang,Xinyan Luo,Lihua Chen
Solar energy, as a renewable and clean energy source, is utilized to obtain freshwater and power generation, serving as a sustainable solution to address water scarcity and power shortages. This study proposes a strategy for power generation based on salinity gradients and designs an inclined composite evaporator. The evaporator features a nickel foam substrate functionalized through cross-linking of sodium alginate (SA) and tannic acid (TA) with trivalent iron ions (Fe 3+ ), enabling efficient electricity generation and freshwater production, named as SA/TA-Fe@Ni. (“Fe” indicates trivalent iron ions (Fe 3+ ) crosslinking) The TA-Fe 3+ coordination complex formed in situ on the evaporator surface appears black and exhibits excellent broad-spectrum light absorption capability. The evaporator is designed with an inclined configuration, which can significantly enhance the water transport performance. The enhanced evaporation flux establishes a stable salinity gradient at the interface, which constitutes the core driving mechanism for salinity gradient power generation. The inclined SA/TA-Fe@Ni evaporator achieves an evaporation rate of 2.14 kg•m −2 •h −1 under standard sun irradiation (one sun). It simultaneously demonstrates excellent seawater desalination and wastewater purification, while generating an open-circuit voltage of 83.7 mV. The system demonstrates outstanding salt tolerance, stability, durability, and environmental adaptability, fully demonstrating the potential of practical applications.
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JOURNAL OF CATALYSIS
·
2026
·
IF 6
Qiongyu Wang,Ziheng Zhang,Xilun Zhang,Hua Xie,Ling Jiang,Fei Chang
Catalytic alkyne semi-hydrogenation is a pivotal industrial transformation currently constrained by the limitations of existing heterogeneous catalysts: precious metals (e.g., Pd) face high costs, while non-precious alternatives (e.g., Ni, Cu, Fe) generally require harsh reaction conditions (100–200 °C, 10–40 bar H 2 ). To address these persistent challenges, we propose a novel strategy integrating alkali metal hydrides, serving simultaneously as hydrogen donors and anionic “ligands” into transition metal systems. Herein, we report a NiFe-LiH composite catalyst that enables efficient and highly selective liquid-phase semi-hydrogenation of alkynes—including aliphatic, aromatic, and heteroatom-substituted substrates under very mild conditions (25 °C, ≤3 bar H 2 ). Mechanistic investigations reveal that reactive hydride species (H − ) are integral to the hydrogenation catalysis. Critically, the formation of unique Li-Ni-Fe-H interfacial species facilitate synergistic interactions wherein anionic hydrides coordinate with transition metals, modulating their electronic states to simultaneously enhance catalytic activity and selectivity. This work demonstrates room-temperature activation and transformation of alkynes enabled by a catalytic Li-Ni-Fe-H system, offering a promising new pathway for developing efficient non-noble metal catalysts for selective hydrogenation reactions.
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JOURNAL OF CHEMICAL RESEARCH
·
2023
·
IF 1.4
Mengyuan Tian,Lixiang Zhang,Lijing Gao,Guomin Xiao
[2.2]-Paracyclophane derivatives have been promising platforms for applications in biology and materials science. To access pure derivatives thereof, a safe and non-toxic synthetic method for 4-n-propyl-[2.2]-paracyclophane is developed via a microwave-assisted and NH2NH2/KOH reduction route. We introduce microwave-assisted acylation for a synthesis that successfully improves the yield and reduces the reaction time. Notably, an exploration of the length and number of the alkyl chains on the [2.2]-paracyclophane ring did not significantly affect the outcome of this reaction. We synthesized 4-n-butyl-[2.2]-paracyclophane and 4,12-dipropyl-[2.2]-paracyclophane via our protocol with high yields. The regioselectivity of the second electrophilic substitution on 4-n-propyl-[2.2]-paracyclophane occurs at the para position of the less substituted phenyl ring.
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Nanomaterials
·
2023
·Vol. 13
·期 6
·994
·
IF 5.3
Wei Dong,Qin Zhou,Wangqiang Shen,Le Yang,Peng Jin,Xing Lu,Yongfu Lian
Soot-containing terbium (Tb)-embedded fullerenes were prepared by evaporation of Tb4O7-doped graphite rods in an electric arc discharge chamber. After 1,2,4-trichlorobenzene extraction of the soot and rotary evaporation of the extract, a solid product was obtained and then dissolved into toluene by ultrasonication. Through a three-stage high-pressure liquid chromatographic (HPLC) process, Tb@C82(I, II) isomers were isolated from the toluene solution of fullerenes and metallofullerenes. With the success of the growth of cocrystals of Tb@C82(I, II) with Ni(OEP), the molecular structures of Tb@C82(I) and Tb@C82(II) were confirmed to be Tb@C2v(9)-C82and Tb@Cs(6)-C82, respectively, based on crystallographic data from X-ray single-crystal diffraction. Moreover, it was found that Tb@C82(I, II) isomers demonstrated different packing behaviors in their cocrystals with Ni(OEP). Tb@C2v(9)-C82forms a 1:1 cocrystal with Ni(OEP), in which Tb@C2v(9)-C82is aligned diagonally between the Ni(OEP) bilayers to form zigzag chains. In sharp contrast, Tb@Cs(6)-C82forms a 2:2 cocrystal with Ni(OEP), in which Tb@Cs(6)-C82forms a centrosymmetric dimer that is aligned linearly with Ni(OEP) pairs to form one-dimensional structures in the a–c lattice plane. In addition, the distance of a Ni atom in Ni(OEP) to the Cs(6)-C82cage is much shorter than that to the C2v(9)-C82one, indicative of a stronger π-π interaction between Ni(OEP) and the C82carbon cage in the cocrystal of Tb@CS(6)-C82and Ni(OEP). Density functional theory calculations reveal that the regionally selective dimerization of Tb@CS(6)-C82is the result of a dominant unpaired spin existing on a particular C atom of the CS(6)-C82cage.Keywords:metallofullerene;terbium;cocrystals;centrosymmetric dimer;unpaired spin
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Handong Jiao,Mengjun Liu,Zhe Wang,Manpeng Lin,Zhaoliang Qu,Jianxun Song,Shuqiang Jiao
Molten salt electrorefining is expected to be a powerful technology for upcycling titanium scrap because of its robust ability of removing impurities. However, realizing the stable operation of electrorefining, for example, the current efficiency of the anode and the cathode is still a key challenge from the viewpoint of industrial applications. Here, we study titanium’s anodic dissolution and cathodic deposition processes via a direct three-dimensional visualization method based on a computed tomography technology under high-temperature operational conditions. Real-time quantitative results show that the current efficiency is obviously affected by the concentration of titanium ions in the melt. Visual analysis of the local dissolution rate and the curvature of the titanium anode at different electrolysis stages reveals the kinetic origin of the concentration-induced current efficiency changes, which arise from the priority of the side reactions being dependent on the concentration of titanium ions. Finally, we show that employing the high concentration and single existence forms of titanium ions is an effective strategy to prevent the side reactions and improve the current efficiency. This work provides a fresh and fundamental understanding of the side reactions occurring at the interface of electrodes and is significant for facilitating the stability of electrorefining engineering of titanium.
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Arabian Journal of Chemistry
·
2023
·
IF 6
Yongjun Shen,Yin Chen,Shuaikang Fang,Jae Kwang Park,Kun Feng
To solve the current energy and environmental dilemma, hydrogen energy is considered to be the best clean energy source to replace traditional fossil fuels. Water electrolysis as the main technology for hydrogen production has been affected by two half-reactions, making it difficult to improve the yield. To solve this problem, the development of inexpensive and efficient bifunctional electrocatalysts is the focus of current research. CuCo 2 S 4 /NF(Ni foam) nanowires are synthesized using a mild hydrothermal process and were later placed in a plasma reactor. Application of the voltage triggers a chemical reaction between the microdischarge wires and the sample. This leads to a change in the physical morphology of the catalyst and an improvement in its catalytic performance. The morphological characterization results show that the catalyst modification generates a distinct flower-like nanowire structure, which helps in the solid attachment of the catalyst to the nickel foam surface. The plasma-modified CuCo 2 S 4 /Ni foam (PA@CuCo 2 S 4 /NF) exhibits low overpotentials of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solutions. Additionally, the Tafel slopes of the HER and OER are 85.9 mVdec −1 and 142.7 mVdec −1 , respectively, indicating optimal reaction kinetics. A cell voltage of only 1.55 V is required to provide a 10 mA cm −2 current during water splitting. This study validates the feasibility of using plasma technology to create high-performance electrocatalysts.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 12
·1-20
·
IF 2.8
Aghazadeh Mustafa,Foratirad Hamzeh
In this paper, porous graphene (PG)/functionalized multiwalled carbon nanotubes (f-MWNTs) composite was first synthesized through a catalytic chemical vapor deposition (CCVD) followed by hydrothermal procedure. The prepared f-MWNTs/PG composite was then embedded into Ni foam (NF) via direct electrophoretic deposition, and Ni(OH) 2 nanoplates were simultaneously deposited on the surfaces of both porous graphene and f-MWNTs through a simple electrochemical deposition. The obtained Ni(OH) 2 @f-MWNTs-PG deposit was characterized through XRD, FT-IR, Raman, DSC-TGA, BET, FE-SEM, and TEM techniques. These analyses results verified that β-Ni(OH) 2 nanoplates uniformly anchored onto both components of the electrodeposited composite. The charge storage ability of the fabricated Ni(OH) 2 @f-MWNTs-NPG/NF was tested as a binder-free supercapacitor electrode through cyclic voltammetry, continuous charge–discharge cycling, and AC impedance techniques, and compared with pristine Ni(OH) 2 /Ni foam electrode. The specific capacities as high as 374.5 mAh g − 1 and 277 mAh g − 1 at the current loads of 0.5 and 10 A g –1 were respectively achieved for the prepared composite/NF electrode. Also, the cycling abilities of 94.8% and 77.8% were obtained after 5000 continuous charge–discharge cycles at 2 and 6 A g –1 , respectively. The outstanding capacitive capability of the fabricated composite electrode was assigned to the synergetic contributions between the Ni(OH) 2 nanoplates and porous graphene/functionalized MWNTs and their rational architecture in the composite matrix.
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LANGMUIR
·
2023
·
IF 3.9
Yao Zhang,Wenjing Wang,Xinliang Chen,Qiaoling Li,Chengcheng Yu
Hydrogen is a valuable clean energy source, and electrolysis to produce hydrogen from water is a crucial component. However, a major problem of hydrogen generation by electrolysis is its large overpotential and poor economics. To reduce the overpotential, we mainly use nickel foam and Co–Mo ions as feedstock and create an efficient catalytic material by electrodeposition. The Co–Mo interaction improves the current efficiency. In 1 mol/L NaOH solution, the overpotential of the Co–Mo-NF composites was low when the current density is −10 mA/cm2, with the best value reaching 45.3 mV, which is less than those of Co-NF (94.4 mV) and Mo-NF (88.2 mV). All deposits had similar Tafel slopes in the 77.9 mV/decade range. The catalyst does not just have a favorable effect on hydrogen formation but also has a surprisingly high double-layer capacitance (up to 180 mF/cm2) and good stability. This research provides an impactful approach for developing a non-precious metal HER catalyst for industrial hydrogen production.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Haowen Shi,Zuoying Cao,Jia Li,Lihan Zhang,Mingyu Wang,Qiyuan Zheng,Jiawei Du,Wenjuan Guan,Guiqing Zhang
Deep separation of tungsten from molybdenum has become a bottleneck in molybdenum metallurgy, especially in high-chloride aqueous systems, because of competitive extraction. A new primary amine extractant, 3-(nonyloxy)propane-1-amine (NNA), was designed and synthesized to separate tungsten and molybdenum. Over 96% extraction efficiency of tungsten was achieved by NNA with the optimal conditions, with the saturated capacity exceeding 55 g/L. Meanwhile, a high separation coefficient of 40 for W to Mo was obtained by single-stage extraction. The extraction mechanism of different NNA concentration ranges was determined based on the H+–MoO42––WO42– aqueous system. The extraction order was Mo3W4O246–, Mo2W5O246–, and [WO42–, MoO42–], with the stoichiometric numbers of NNA determined as 8, 8, and 1, respectively. Remarkably, NNA exhibited good performance in high-chloride aqueous systems. The separation coefficient toward W over Mo was greater than 3.00 × 104 with a three-stage countercurrent extraction. In conclusion, NNA has a tremendous potential application value for tungsten and molybdenum separation, especially in complex systems.
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