Materials Chemistry Frontiers
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2024
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IF 6
Mohit Kumar,Bhimanaboina Ramulu,Jae Su Yu
To produce clean and green hydrogen energy from electrolytic water, better electrocatalytic materials need to be developed. Herein, we reported the development of a Ti3C2 MXene@Ni/Co sulfide hybrid material for the use in hydrogen evolution reaction (HER) process, which is effective and stable. The shape of metal sulfide and its interactions with Ti3C2 MXene caused electronic coupling. This increased both the exposed metal sulfide's active edge sites and the charge-transfer speed. When compared with pure MXene and Ti3C2 MXene@NiS nanostructure, Ti3C2 MXene@Co4S3 exhibited outstanding electrocatalytic activity and stability in the HER process. The unique properties of the skeletal structure and the robust interface interaction between Co4S3 and MXene are responsible for the superior performance of Ti3C2 MXene@Co4S3 in the HER process. Our research offers a practical method to synthesize specialized nanostructures for electrocatalysis, electronics, and other applications.
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ACS Applied Nano Materials
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2024
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IF 5.3
Xi-ya Shan,Xing-hai Zhou,Wen-qi Cui,Min-yu Li,Yuan-lin Yan,Yong-fang Qian,Yuan Gao,Shang-ru Zhai,Li-hua Lyu,Hong-zhu Liu,Zhong-gang Wang
Ingenious microstructure design and suitable component regulation are the prevailing methods to meet the requirements of lightweight, broadband, and high-efficiency electromagnetic absorbing materials. Herein, petal-like magnetic Ni nanosheets on porous carbon nanofibers (Ni-PCF) are synthesized by electro-blown spinning, hydrothermal reaction, and high-temperature calcination. The construction of a porous carbon fiber skeleton originated from the in situ composition of the pore-forming agent (polystyrene (PS)), and the formation of petal-like magnetic Ni nanosheets was derived from self-assembling during a hydrothermal reaction. The porous carbon fiber skeleton and petal-like Ni nanosheets could not only generate multiple reflections to extend the transmission pathway but also induce a synergistic effect of magnetic loss and dielectric loss to promote impedance matching, giving rise to more electromagnetic wave attenuation and energy dissipation. The good impedance matching, multiple reflections, and synergetic electric/magnetic losses originating from ingenious microstructures and suitable multicomponents resulted in the best microwave absorption performance of Ni-PCF2 with a minimum reflection loss (RLmin) value of 37.93 dB at 6.08 GHz and an effective absorption bandwidth (EAB) of 4.43 GHz.
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LANGMUIR
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2024
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IF 3.7
Jia-qi Bai,Jiahui Xu,Mei Ma,Zhengan Miao,Jiawen Yu,Huangfei Liu,Zhangkai Qian,Mengdie Cai,Qin Cheng,Yong Jiang,Song Sun
As haloanilines (HANs) are important organic intermediates and fine chemicals, their preparation over non-noble-metal-based catalysts by catalytic hydrogenation has attracted wide attention. However, the reaction suffers from relatively harsh conditions. Herein, we found that a 3.5%Ni/P25 catalyst exhibited superior photo-thermal catalytic activity with a TOFs of 5207 h–1 for hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroaniline under a 300 W full spectrum, which was much higher than that of photo- and thermal catalysis alone. Moreover, the 3.5%Ni/P25 catalyst could be recycled 4 times and was effective for the hydrogenation of various halonitrobenzenes (HNBs) with superior selectivity. Furthermore, the kinetic research showed that the excellent catalytic performance could be attributed to the better activation and dissociation of H2 by photo-thermal catalysis and the hydrogenation of p-CNB obeyed the condensation routine by ionic hydrogenation over 3.5%Ni/P25.
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PubMed
高影响因子
Molecular Catalysis
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2024
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IF 3.9
Yuhao Tian,Yixuan Li,Dong Cao,Qiying Liu,Weijie Cai
Photo-assisted ethanol dry reforming (EDR) for syngas production was deeply studied over nanorod-like Ni/ZrO 2 catalyst synthesized by precipitation and impregnation technique, respectively. The effect of light irradiation as well as catalyst preparation method on EDR reaction was investigated in detail with the stoichiometric feed ratios, over a temperature region of 350 to 550 °C. Photo-enhancement factor of ethanol conversion greatly increased from 10% (dark) to 40% (light) together with less formation of byproducts. Moreover, the experimental results depicted the better performance of P-Ni/ZrO 2 catalyst due to its abundant oxygen vacancies and strong Ni-Zr interaction. Enriched interfacial oxygen defects and more light-excited electrons facilitated the activation/dissociation of ethanol and CO 2 , thereby enhancing the catalytic activity. In addition, the mean particle size of NiO in P-Ni/ZrO 2 was (10.3 nm) which was smaller than that of the I-Ni/ZrO 2 (16.5 nm), suggesting its higher dispersion of active metal. The calculated apparent activation energy of P-Ni/ZrO 2 was 20.6 eV which was much less than the value of I-Ni/ZrO 2 (37.7 eV). This work might provide the valuable insight for the development of highly-efficient photothermal catalyst to enhance the value-added utilization of greenhouse gas CO 2 .
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ACS Applied Nano Materials
·
2024
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IF 5.3
Chengming Long,Sirui Liu,Di Wang,Zhaoqi Lu,Qiulan Zhang,Qiong Gao,Mingyi Zhang,Xinzhi Ma
Photoelectrochemical hydrogen production technology holds promise for directly and swiftly generating green hydrogen, which is pivotal for human welfare; however, it faces challenges posed by the energetically sluggish oxygen evolution reaction (OER). Cobalt-based nitrides are considered excellent photoelectrochemically active in the OER (PEOER) catalysts, and their conductivity and photoconversion efficiency remain relatively low. This paper presents the fabrication of Ni-alloyed Co4N nanowire arrays on carbon cloth ((Co1–xNix)4N NWAs/CC) as PEOER catalysts. By analyzing advanced in situ Raman and X-ray photoelectron spectroscopy (XPS) results, we discovered that Ni not only enhances the conductivity of the catalyst but, more importantly, also creates more photoexcited Co2+ OER centers and favors its reconstruction to CoOOH to charge PEOER. Furthermore, nitrogen plays a critical role in transforming pyridinic nitrogen into other forms of nitrogen to stabilize the catalyst’s structure. These advantages endow (Co0.74Ni0.26)4N NWAs/CC with remarkable PEOER enhancement (988%), which drives the standard current density of 10 mA cm–2 with only a 283 mV overpotential along with good durability. This research provides insights into the PEOER mechanisms of cobalt-based transition metal nitrides, providing a way for designing next-generation PEOER catalysts.
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Journal of Energy Chemistry
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2024
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IF 14
Shilin Fan,Bin Zhu,Xiao Yu,Yang Gao,Weiping Xie,Yong Yang,Jian Zhang,Chunlin Chen
Biomass, derived from plant photosynthesis that captures carbon dioxide to form carbohydrates, offers vast renewable reserves. The electrooxidation of biomass, coupled with the hydrogen evolution reaction, enables the simultaneous production of biomass-based plastic monomers and green hydrogen, attracting significant scholarly interest. However, ambiguity remains regarding the adsorption mechanism at the catalyst surface (Langmuir-Hinshelwood or Eley-Rideal) and the adsorbed substrate groups. To address this, we prepared a Ni/Co electrode for the electrooxidation of 5-hydroxymethylfurfural (HMF) into 2,5-furandicarboxylic acid (FDCA) through a corrosion reaction and electro-reduction pathway. HMF conversion reached 100.00%, FDCA yield reached 96.82%, and Faradic efficiency (FE) reached 92.14%. Meaningfully, utilizing in-situ spectroscopy and electrochemical methods, this work provided valuable insights into active sites and catalyst surface adsorption.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Minglu Li,Siyu Kuang,Yaxin Jin,Haoyuan Chi,Sheng Zhang,Xinbin Ma
Copper-based catalysts exhibit an excellent ability in producing C 2 chemicals during CO 2 RR. However, the unsustainable Faradic efficiency (FE) resulting from the reconstruction makes keeping catalyst behavior challengeable. In this study, we synthesized CuO nanosheets and incorporated a small amount of nickel on surface to improve the stability of nanosheets. By inhibiting the dissolution of Cu through the incorporation of Ni, our CuO + Ni-surface catalyst could achieve a double increase in stability compared to CuO nanosheets. Using a combination of electrochemistry, density functional theory calculations, in situ UV–vis spectrometer and inductively coupled plasma optical emission spectrometry, we elucidate the mechanisms behind the increased stability. The incorporation of Ni reduces the tendency of Cu oxidation at higher overpotential and strengthens the bonds between surface and subsurface Cu atoms. This work highlights a promising approach to enhance the stability and efficiency of copper-based catalysts in CO 2 RR, proposing the way for more sustainable catalytic processes.
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Nano Energy
·
2024
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IF 16.8
Yu Tang,Zhiyong Huang,Wei Wang,Yali Wen,Shuoxiao Zhang,Xi Chen,Zhibo Zhang,Zijia Yin,Tingting Yang,Tianyi Li,Leighanne C. Gallington,He Zhu,Si Lan,Steven Wang,Yang Ren,Zhenduo Wu,Qi Liu
The sluggish Li-ion kinetics restrict the rapid charging capabilities and contribute to the structural deterioration of Ni-rich cathode materials . Notably, crack propagation during repeated charging cycles deteriorates the electrochemical stability, which hinders the further development of high-energy-density batteries for electric vehicles (EVs). In this paper, we proposed a simple yet effective method to enhance the Li-ion diffusion and mechanical properties of Ni-rich cathodes via straightforward Zr doping. In-situ high-rate XRD reveals that the detrimental uneven delithiation under the fast-charging process has been largely alleviated. Particularly, a robust structure with higher modulus and fracture strength is constructed owing to the higher Zr-O bond. By mitigating the kinetic hindrance and increasing the particle’s stiffness, the proposed Ni-rich cathode shows an impressive 97.6 % capacity retention under a 5 C rate current. This work provides a facile and efficient strategy for large-scale production of fast-charging Ni-rich cathode materials.
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ACS Nano
·
2023
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IF 17.1
Lianshan Ni,Hongyi Chen,Jinqiang Gao,Yu Mei,Haoji Wang,Wentao Deng,Guoqiang Zou,Hongshuai Hou,Xiaobo Ji
Further popularization of ultrahigh-Ni layered cathodes for high-energy lithium-ion batteries (LIBs) is hampered by their grievous structural and interfacial degeneration upon cycling. Herein, by leveraging the strong electronegativity and low solubility properties of Sb element, a multifunctional modification that couples atomic/microstructural reconstruction with interfacial shielding is well designed to improve the LiNi0.94Co0.04Al0.02O2 (NCA) cathode by combining Sb5+ doping and Li7SbO6 coating. Notably, a robust O framework is established by regulating local O coordination owing to the incorporation of a strong Sb–O covalence bond, leading to the inhibited lattice O evolution at high voltage, as revealed by synchrotron X-ray absorption spectroscopy. Moreover, the radially aligned primary particles with (003) crystallographic texture and refined/elongated sizes are achieved by the pinning of Sb on grain boundaries and are confirmed by scanning transmission electron microscopy, resulting in the fast Li+ diffusion and mitigated particle cracking. Additionally, in situ construction of the Li7SbO6 ionic conductive layer on grain boundaries can effectively boost interfacial stability and Li+ kinetics. As a result, the optimal Sb-modified NCA delivers a high capacity retention of 94.6% after 200 cycles at 1 C and a good rate capacity of 183.9 mAh g–1 at 10 C, which is expected to be applied to next-generation advanced LIBs.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2024
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IF 2.6
Li Gang,Ren Haifang,Geng Chunping,Wu Xiang
Electrical energy storage devices (EES) play an important role in the development of portable electronic devices, power grids, and electric vehicles. Supercapacitors (SCs) become the focus of the EES field due to their high power density and high energy density. ZnCo 2 O 4 ternary metal oxides show considerable potential as electrodes for SCs. In this work, Ni(OH) 2 and PPy materials are combined on the surface of ZnCo 2 O 4 samples. The synthesized products possess a specific capacitance of 1256 C/g at 1 A/g and an energy density of 69 Wh/kg at 1350 W/kg. Moreover, the assembled device retains 81% of its capacity after being fully charged and discharged 10,000 times.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Zihan Lv,Zeng Hong,Da Ke,Chao Qian,Xinzhi Chen,Shaodong Zhou
The selective hydrogenation of nitrile compounds represents a pivotal area of research within both industrial and academic catalysis. In this study, we prepared Ni-Cu bimetallic catalysts through a co-deposition-crystallization sequence, aimed at the efficient production of primary and secondary amines. The enhanced selectivity for primary amines is attributed to the downshift of the d-band center of Ni 0.1 Cu, which weakens the adsorption of key imine intermediates. Consequently, the synthesized Ni-Cu catalysts demonstrated exceptional catalytic performance in the selective hydrogenation of nitrile compounds, including those with reduction-sensitive functional groups such as −Cl and −Br, achieving 100 % conversion efficiency and significant yields ranging from 80 % to 99 %. The reaction conditions were comprehensively optimized, taking into account factors such as temperature, solvent, time, additives, and hydrogen pressure. Furthermore, the catalytic performance of Ni 0.1 Cu and Ni 0.4 Cu in the selective hydrogenation of nitriles was sustained over at least five reaction cycles. Temperature-programmed desorption results elucidated the structure–activity relationship, revealing that a strong interaction site prevails in Ni 0.4 Cu, while a weaker or moderate interaction site in Ni 0.1 Cu is responsible for the formation of primary amines. Theoretical calculations indicate that the reaction proceeds via an imine mechanism, with benzylideneimine serving as a key intermediate. This work may stimulate further research into the development of bimetallic nano-catalysts for selective nitrile hydrogenation in industrial catalytic processes.
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DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2025
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IF 6.5
Ting-Sheng Chen,Di Liu,Yun-Jie Li,Xing-Bao Wang,Chang-Hai Liang,Zhen-Yi Du,Wen-Ying Li
Controlling the oxygen-free product selectivity in catalytic hydrodeoxygenation is essential for producing high quality fuels from coal- and biomass-derived crude liquids. A series of boron-doped Ni/SiO 2 catalysts were prepared for the efficient hydrodeoxygenation of dibenzofuran as a model compound. Boron doping significantly promoted the transformation of 2-cyclohexylcyclohexanol, which was accumulated as the main oxygen-containing intermediate compound on the pristine Ni/SiO 2 catalyst, to the target products bicyclohexane and its isomer cyclopentylmethylcyclohexane. Characterization results show that boron doping increases Ni dispersion, modifies the electronic properties of Ni sites and in situ generates Brønsted acid sites by H 2 spillover to boron oxides. The reduced Ni particle size improves the rates of dibenzofuran hydrogenation and 2-cyclohexylcyclohexanol dehydration. Electron-deficient Ni and boron oxides as the Lewis acid sites enhance the adsorption of 2-cyclohexylcyclohexanol. Furthermore, the in situ generated Brønsted acid sites favor the dehydration of 2-cyclohexylcyclohexanol, which gives the Ni-5B/SiO 2 catalyst a better deoxygenation activity than the mechanical mixture of equal amounts of 5B/SiO 2 and Ni/SiO 2 , as well as the one with a smaller Ni particle size of 3.8 nm.
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