ENERGY & FUELS
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2026
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IF 6
Boya Hao,Gang Hou,Zewei Liu,Zeyuan Lei,Chongyi Wang,Bofeng Zhang,RongRong Zhang,Xingjie Wang,Jiafei Lyu,Guozhu Liu
The growing demand for sustainable aviation fuel (SAF) makes extending the carbon chain from ethanol a strategy well worth pursuing. Herein, a series of Ni/MgO@C catalysts derived from Ni/Mg bimetallic metal–organic frameworks (MOFs) was evaluated for the Guerbet coupling of ethanol to higher alcohols within the alcohol-to-jet (ATJ) strategy. Owing to the isolated metal nodes in the periodic framework, highly dispersed Ni species on the magnesium-based solid supports with abundant basic sites have been accessed. The catalyst with a Ni/Mg molar ratio of 0.13 achieved a higher alcohol yield of 55.5% at 88.4% ethanol conversion under 2 MPa N2 at 240 °C for 10 h. Upon extending the reaction to 24 h, C8–C16+ alcohols accounted for 41.4% of the alcohol product pool. Comprehensive catalyst characterization combined with theoretical calculations revealed that the involvement of Ni species can accelerate the dehydrogenation step, while an appropriate Niδ+/Ni0 ratio can be critical for efficient carbon chain elongation by promoting alcohol dehydrogenation to aldehyde and simultaneously suppressing their deep decomposition through weakened interaction with the catalyst surface.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Weiqi Lu,Zhenyang Dai,Ruichao Xu,Yufeng Chen,Min Ge,Wenxue He,Jinglin Yuan,Yanna Shui,Ya Pan,Yong Zhang,Chao Wang,Yajuan Feng,Shi He,Zhihu Sun
Conventional Ni–N 4 single-atom catalysts (SACs) hold great promise in sustainable energy conversion and storage, but suffer from weak * COOH adsorption and narrow potential windows during CO 2 electroreduction (CO 2 RR). To address this limitation, herein we report an asymmetric Ni–N 3 O 1 SAC prepared via an oxygen-mediated spatial confinement pyrolysis strategy. Theoretical calculations predict that this unique asymmetric coordination can effectively lower the * COOH formation energy, promote the interaction between the catalyst and * COOH, and suppress the competing hydrogen evolution reaction in CO 2 RR. The prepared Ni–N 3 O 1 SAC features a distorted planar quadrilateral structure and demonstrates exceptional performance in CO 2 -to-CO conversion, with a maximum turnover frequency of 207 700 h −1 , a maximum CO partial current density of 810 mA cm −2 , and CO Faradaic efficiency of ≥ 99% over an ultra-wide potential window of 2100 mV (−0.3 to −2.4 V vs. reversible hydrogen electrode) in a flow cell. A combination of in situ spectroscopic measurements verifies the reversible structural evolution and robust stability of the Ni–N 3 O 1 SAC under CO 2 RR conditions, as well as the strengthened * COOH formation and accelerated CO 2 activation kinetics. This work provides a feasible route for designing and synthesizing high-performance asymmetrically coordinated SACs toward industrial CO 2 -to-CO conversion.
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ACS Sensors
·
2025
·
IF 9.1
Kang Yang,Bin Zhou,Hong Zhou,Tianrun Zheng,Yueying Liu,Xishuang Liang,Fengmin Liu,Geyu Lu
Rapid and robust ppb-level H2S sensing is of great importance for environmental monitoring, industrial safety, food quality control, and disease screening. However, improving the H2S sensing properties of semiconductor oxides under low-power conditions remains a significant challenge. In this work, an acid etching method was utilized to precisely control the elemental distribution in bimetallic nanoalloys. By tailoring the Ni distribution in PdNi alloy nanoparticles anchored on ZnO nanosheets, an ultralow detection limit of 5 ppb for H2S was achieved at a working temperature of 140 °C. More importantly, the sensor also demonstrated fast response and recovery kinetics, with its superior antipoisoning performance attributed to the oxidation of H2S into SO2 instead of sulfates or sulfites, as evidenced by in situ FTIR spectroscopy. Additionally, density functional theory calculations were performed to elucidate the synergistic effect of the PdNi alloy, revealing that Pd atoms act as electron donors while Ni atoms facilitate H2S adsorption. This study provides a viable strategy for optimizing noble metal-modified oxide-based gas sensors.
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Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 46
·24579-24589
·
IF 11.301
Yongkang Han,Jinmei Xu,Wei Wang,Fu Long,Qunting Qu,Yan Wang,Honghe Zheng
Interfacial modification is one of the most important technologies to improve the overall electrochemical properties of Ni-rich cathodes. Herein, a novel strategy of in situ planting of an electrolyte film-forming additive on a single crystal NCM811 surface is proposed by consuming the residual lithium to develop a functional Al(Li)BOB nano-layer. Different from traditional physical coating, this approach cleverly consumed the undesirable residual lithium on the NCM811 surface. The in situ grown 30–50 nm Al(Li)BOB layer on the single crystal NCM811 cathode surface contributes to its much enhanced electrochemical performances. At a high operating voltage (charge voltage limit of 4.5 V vs. Li/Li+), the capacity retention is greatly increased from 57.0% to 83.5% after 295 cycles. Meanwhile, the incorporation of aluminum is effective in improving the thermal stability of the Ni-rich cathode. The novel interfacial strategy by in situ implanting of an electrolyte additive is of important significance for solving the critical interfacial issue for Ni-rich cathode materials.
研究领域:
材料科学
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电化学
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能源存储
·
锂离子电池
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界面工程
·
纳米材料
·
固态化学
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ENERGY CONVERSION AND MANAGEMENT
·
2026
·
IF 11.8
Weiguo Liu,Phumlani Fortune Msomi,Ndzondelelo Bingwa,Chenggong Sun,Yunpu Wang,Zhenyong Lu,Hui Li
Microwave-assisted technology has emerged as an efficient approach to enhance heterogeneously catalyzed transesterification reactions to produce fatty acid methyl esters (FAME), which are the major components of biodiesel. Our previous studies have confirmed that the dielectric loss capability of the catalyst plays a crucial role in enhancing catalytic activity under microwave fields. However, in addition to dielectric loss performance, the impact of magnetic loss performance on material absorption performance must not be overlooked. To address this gap, this study systematically investigates the role of magnetic loss in microwave-assisted transesterification. Herein, we successfully synthesized a magnetic catalyst (Ni/CaO-CNT) and non-magnetic catalyst (Cu/CaO-CNT) to investigate influence of magnetic loss on transesterification, evaluated the catalytic performance in transesterification reaction of palm oil and methanol. The results indicated that Ni doping optimized the magnetization of Ni/CaO-CNT (5.4 emu/g), and when compared to Cu/CaO-CNT, the magnetic loss ability of Ni/CaO-CNT was increased by 6.5 times, greatly enhancing its microwave-absorbing capacity. Although Cu/CaO-CNT catalyst had a higher basicity (0.68 mmol/g) than the Ni/CaO-CNT (0.65 mmol/g), the Ni/CaO-CNT demonstrated superior catalytic performance under microwave conditions, achieving a transesterification conversion of 94.4% compared to 87.3% of Cu/CaO-CNT, an over 7% improvement that demonstrates magnetic loss significantly enhances catalytic efficiency beyond what can be achieved through basicity alone. Moreover, the turnover frequency (TOF) of Ni/CaO-CNT reaches 84.28 h −1 , substantially higher than that of Cu/CaO-CNT (68.12 h −1 ). Compared to the non-magnetic catalyst, Cu/CaO-CNT, the Ni/CaO-CNT catalyst saves 38.5% of energy consumption and reduces 2.1 kg of CO 2 per kilogram of FAME produced.
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Small
·
2023
·Vol. 19
·期 26
·2206798
·
IF 13.3
Yaoxing Wang,Xueqin Fan,Qiuyu Du,Ying Shang,Xueqi Li,Zhifeng Cao,Xuan Wang,Jian Li,Yanjun Xie,Wentao Gan
The oxygen evolution reaction (OER) has significant effects on the water-splitting process and rechargeable metal-air batteries; however, the sluggish reaction kinetics caused by the four-electron transfer process for transition metal catalysts hinder large-scale commercialization in highly efficient electrochemical energy conversion devices. Herein, a magnetic heating-assisted enhancement design for low-cost carbonized wood with high OER activity is proposed, in which Ni nanoparticles are encapsulated in amorphous NiFe hydroxide nanosheets (a-NiFe@Ni-CW) via direct calcination and electroplating. The introduction of amorphous NiFe hydroxide nanosheets optimizes the electronic structure of a-NiFe@Ni-CW, accelerating electron transfer and reducing the energy barrier in the OER. More importantly, the Ni nanoparticles located on carbonized wood can function as magnetic heating centers under the effect of an alternating current (AC) magnetic field, further promoting the adsorption of reaction intermediates. Consequently, a-NiFe@Ni-CW demonstrated an overpotential of 268 mV at 100 mA cm −2 for the OER under an AC magnetic field, which is superior to that of most reported transition metal catalysts. Starting with sustainable and abundant wood, this work provides a reference for highly effective and low-cost electrocatalyst design with the assistance of a magnetic field.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
·
IF 8.7
Qiang Gao,Yu Zhang,Shuai Zhang,Yan Ma,Xianzhe Sheng,Linhao Hui,Zhiwei Wang,Shuhuan Yun,Jianbin Qin,Guangcheng Zhang
To simultaneously enhance the processability, electrical conductivity and mechanical properties of composite foam for high-performance electromagnetic interference (EMI) shielding application, in this work, the epoxy (EP)/reduced graphene oxide (rGO)/Ni-chains microcellular composite foam is prepared through strategy of combining the hierarchical structured aerogel skeleton and supercritical carbon dioxide (scCO 2 ) foaming process. Benefiting from the construction of the rGO/Ni-chains bicontinuous conductive skeleton and introduction of microcellular structure, the EP/rGO/Ni-chains microcellular foam displays a “brick-and-mortar” structure and implements the multiple dissipation mechanism of electromagnetic (EM) wave to achieve outstanding EMI shielding efficiency (EMI SE) of 41.11 dB in X-band. Moreover, the selection of liquid epoxy as matrix avoids the use of large amounts of organic solvents, ensures the well processability of composite and realizes the excellent compressive strength (27.33 MPa) of the EP/rGO/Ni-chains microcellular foam with a density of 0.88 g/cm 3 , which shows great application value as a high-performance EMI shielding material.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Shiyu Zhang,Mengru Li,Jingwen Wang,Ruonan Zhang,Xiaoyu Ma,Haisheng Tao
Metal-organic frameworks with high porosity have received much attention in environmental pollutant treatment. This study presented a simple single-pot solvent thermal method for the preparation of a bimetal-organic framework MIL-53(Fe,Ni), further used for activated peroxydisulfate to degrade rhodamine B (RhB). The morphology and structure of the sample were characterized by scanning electron microscopy, transmission electron microscopy , x-ray diffraction, photoelectron spectroscopy , fourier transform infrared spectroscopy , and thermogravimetric analysis . The results showed that MIL-53(Fe,Ni) was successfully synthesized by the simple reaction, with high thermal stability and high specific surface area. The effects of pH value, co-existing ions, temperature, humic acid and different real water samples on RhB degradation were systematically investigated. Under optimized conditions, 93.9% of RhB was degraded within 180 min, together with excellent reusability. Quenching experiments and electron paramagnetic resonance showed that both free radicals (∙OH, SO 4 ∙- and O 2 ∙- ) and non-free radicals ( 1 O 2 and direct charge transfer) were responsible for the RhB degradation. In addition, the identification of intermediates by high-resolution mass spectrometer and reaction site prediction calculations (electrostatic potential, Fukui function and molecular orbit analysis), proposing a possible degradation pathway of RhB. The work highlights the broad applications of bimetal-organic frameworks in advanced oxidation processes .
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VACUUM
·
2023
·
IF 4
Jian Zhang,Chang Xu,Jing Li,Huanjun Lu,Shaohui Zhang,Chao Wang
In this paper, the Cu-/Ni-based one-dimensional (1D) conductive metal-organic frameworks (c-MOFs) nanorods (Cu 3 (HHTP) 2 /Ni 3 (HHTP) 2 ) have been synthesized successfully through a one-pot hydrothermal method . The effect of reaction time, MOFs compositions and ratio of solvent on the performance of Cu 3 (HHTP) 2 -/Ni 3 (HHTP) 2 - based resistive temperature sensors was studied by sensing platforms. Compared with Ni 3 (HHTP) 2 -based sensor, Cu 3 (HHTP) 2 -based sensor, which was assembled under DMF volume of 0.5 mL and reaction time of 12 h (Cu7), provided the optimal performance, for example, relative variation of resistance (RVR) near-linearly decreased by 85.9% from 20 °C to 80 °C, and the temperature coefficient of resistance (TCR) reached up −0.0157 °C -1 . Moreover, the resistance value of the Cu 3 (HHTP) 2 -based sensor is 0.106 kΩ, which exhibited a minimum resistance under different temperatures. These results demonstrate that the use of Ni 3 (HHTP) 2 -based 1D c-MOFs for fabrication of temperature sensor provides good conductivity and high thermo-responsive sensitivity. Hence, this study provided an excellent example for the simple preparation and practical application of 1D c-MOFs-based near-linear temperature sensor.
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Science China-Materials
·
2023
·Vol. 66
·期 7
·2803-2811
·
IF 8.1
Cheng Haoran,Pan Yamin,Wang Tiecheng,Zhou Yang,Qin Yijing,Liu Chuntai,Shen Changyu,Liu Xianhu
Ingenious microstructural design and suitable multicomponent strategy remain challenging for efficient absorption-dominated electromagnetic interference (EMI) shielding materials with light weight, low filling levels and thin sample thickness. Herein, a flexible waterborne polyurethane (WPU)/dielectric carbon nanotube (CNT)/magnetic anisotropic Ni (chain or flower) EMI shielding composite sponge based on the unique shielding capsule structure was constructed by a dip-coating process. The results show that increasing the Ni (flower or chain) filler content significantly improves the electrical conductivity and EMI shielding properties of composites. The EMI shielding performances of WPU/CNT/8 wt% Ni flower-melamine foam (MF) and WPU/CNT/8 wt% Ni chain-MF are 42.8 and 46.7 dB, respectively, which exceed those of the composite sponge with only CNTs. The synergistic effect between CNTs and Ni (flower or chain) means that the main EMI shielding mechanism of the composite sponge comes from the absorption process. Importantly, owing to the protection of the WPU layer, the composites exhibit excellent EMI shielding effectiveness (SE) even under severe physical and chemical degradation. This research provides a simple synergistic approach for the design of novel, lightweight, and efficient EMI shielding composites, which show great promise for applications in portable and wearable electronic devices.
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ACS Applied Energy Materials
·
2023
·
IF 6.4
Hua Yang,Yi Duan,Huiling Gu,Lihua Liu,Hongtao Guan,Chengjun Dong,Gang Chen
Metal–organic frameworks (MOFs) with porous structures are beneficial for electrochemical energy storage. Herein, the in-situ growth of the S-doped Ni-MOF nanosheet (S-NMN) on the surfaces of nickel foams was prepared via a facile solvothermal process. Owing to the rich active sites, small transport barrier, and excellent mechanical stability, the fabricated S-NMN-2 electrode displays a high specific capacity (1952 mF cm–2 at 1 mA cm–2), satisfactory rate performance, and remarkable cyclic stability. For practical application, the assembled S-NMN-2//AC device achieves a high energy density of 0.189 mWh cm–2 at the power density of 1.600 mW cm–2 with prominent cycling stability (93.27% capacity retention after 4000 cycles). The facile strategy of etching nickel foam demonstrates a new idea for developing high-performance supercapacitor materials.
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RSC Advances
·
2023
·Vol. 13
·期 13
·8901-8914
·
IF 3.9
Xinkuai He,Zhousi Hu,Qingtian Zou,Jingjing Yang,Ruqing Guo,Luye Wu
The preparation of active, stable and low-cost non-noble electrocatalysts for the hydrogen evolution reaction (HER) using the electrochemical water splitting process is crucial for the promotion of sustainable energy. In this study, Co–Ni alloys with various Co contents are prepared using a galvanostatic method and the co-deposition behavior of Co2+ and Ni2+ in ethylene glycol (EG) is reported. These results indicate that the presence of additional Ni2+ species can accelerate the Co–Ni co-deposition process and Co2+ species in the system can inhibit the reduction of Ni2+. Moreover, the two effects are improved with an increase in Ni2+ or Co2+ species concentration in the EG system, respectively. Chronoamperometry records show that the Co–Ni electro-crystallization mechanism is one of 3D instantaneous nucleation and growth. Moreover, the Co–Ni alloy with 59.46 wt% Co exhibits high electrocatalytic activity for HER with an overpotential of 133 mV at 10 mA cm−2 in 1 M KOH due to a high value of electrochemical active surface area (ECSA) (955.0 cm2). Therefore, the Co–Ni alloy electrocatalyst obtained from the EG system could be a promising candidate for practical hydrogen production.
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