ChemNanoMat
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2026
·Vol. 12
·期 4
·e202600011
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IF 2.6
Yang Zhou,Yajun Xue,Bing Zhou,Gaojie Han,Chuntai Liu,Yuezhan Feng
Ammonia-assisted high-temperature reduction is exploited to create ultrathin (23.7 µm) MXene/reduced graphene oxide/Ni (MXene/rGO/Ni) composite films in which monodisperse metallic Ni nanoparticles are nanosoldered between conductive nanosheets. The single-step protocol simultaneously deoxygenates graphene oxide (GO), restores the MXene basal plane, and reduces Ni 2+ , generating an intact yet flexible layered scaffold with a through-plane electrical conductivity of 3.3 × 10 3 S m −1 and sheet resistance as low as 4.5 Ω sq −1 . The reconstructed heterointerfaces supply abundant dipole polarization centers and magnetic dissipation sites, endowing the film with an X-band electromagnetic interference shielding effectiveness (EMI SE) of 35.1 dB that operates through a synergistic reflection absorption mechanism (reflection coefficient R ≈ 0.9, absorption shielding effectiveness SE A ≈ 24.9 dB). Benefiting from the dense conductive network, the film enables efficient photothermal conversion and delivers linearly tunable photothermal response with excellent cycling stability. Mechanical tensile tests give an ultimate strength of 7.4 MPa, Young's modulus of 0.97 GPa, and toughness of 31.19 KJ m −3 for rMG/Ni-600 films. The aqueous fabrication route and excellent batch-to-batch reproducibility highlight the reliability of MXene/rGO/Ni homogeneous layers as lightweight, multifunctional shields for flexible electronics and high-temperature photothermal-management platforms.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 9.2
Bowen Zhang,Bingshuo Li,Tianhua Yang,Xingping Kai,Jian Wang,Rundong Li
As a clean energy source, hydrogen has attracted wide attention due to its advantages of renewability, high energy density and no pollution. Methanol has a hydrogen content of 12.6 wt%, which is an ideal source for H 2 production. In this study, FactSage software was used to simulate methanol aqueous phase reforming (APR) reaction for H 2 production. Thermodynamic analysis based on the Gibbs free energy minimization method indicated that methanol decomposition required a threshold temperature of 230−240 °C, which was also promoted the water gas shift (WGS) reaction. Based on the optimal H 2 production temperature obtained by simulation, the effect of methanol to water molar ratio on H 2 production was investigated. Under the optimal methanol to water molar ratio, the effects of reaction temperature and Ni/AC catalyst on H 2 production were investigated. It was found that the simulation results were consistent with the experimental results without catalyst under the condition of constant temperature and constant volume. At 240 °C, the methanol to water molar ratio of 4: 3 was beneficial to the forward WGS. The H 2 yield reached a peak of 41.9 mmol/L under the conditions of 240 °C, 10Ni/AC, methanol to water molar ratio of 6: 3 and reaction time of 1 h. Combined with density functional theory (DFT) calculation, the adsorption models of methanol and reaction intermediates (∗CH 2 O, ∗HCOOH) on the oxygen vacancy of C–O bond on Ni/AC were constructed. The mechanism of methanol APR, with methanol decomposition as the primary reaction and WGS as the secondary reaction, offers theoretical support for H 2 production from methanol APR.
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Small
·
2026
·
IF 11.8
Yingjie Sun,Xudong Li,Peng Gao,Wenhao Jia,Shumin Liu,Robson Monteiro,Zhongzhu Liu,Luanna Parreira,Ruichen Zhu,Yongming Zhu,Liguang Wang
Material degradation in layered oxide cathodes, particularly mechanical degradation, presents a “chicken or egg” dilemma as it may originate from either the surface or the bulk. Surface-only or bulk-only modifications have proven insufficient to resolve these intrinsic issues. While combined surface-bulk strategies can mitigate degradation, they often require complex processes that increase costs and limit scalability. Here, we report a design that couples bulk structural stabilization with the in situ formation of a fast conductive interphase on Ni-rich layered oxides. This dual approach yields a robust bulk framework and a stable surface with accelerated reaction kinetics, enabling a high-rate capability of over 160 mAh g −1 at the current of 5 C and stable cycling over 200 cycles. Beyond performance gains, our results reveal atomic-scale insights into the interplay between structural evolution, ionic transport, and electrochemical stability, offering a practical pathway to durable high-nickel cathodes for fast-charging batteries.
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PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2026
·
IF 6.9
Xingtao Cheng,Kaijun Wei,Ziqiang Wu,Shilin Guo,Longbo Luo,Yi He
Inspired by biological surfaces such as lotus leaves and Stenocara beetles, superhydrophobic coatings have attracted considerable attention due to their exceptional water repellency, self-cleaning behavior, and corrosion resistance. In this work, Ni-Cu/HDTMS-MX superhydrophobic coatings were fabricated through the co-deposition of MXene with a Ni Cu coating, followed by surface modification using hexadecyltrimethoxysilane (HDTMS). The Ni-Cu/HDTMS-MX coatings exhibit excellent superhydrophobic performance, with a water contact angle (CA) of 155.1 ± 2.2° and a roll-off angle (RA) of 6 ± 0.5°, accompanied by effective water jet rebound, self-cleaning capability, and enhanced corrosion resistance. Electrochemical measurements demonstrate an order-of-magnitude reduction in corrosion rate (0.5 × 10 −3 mm·y −1 ) and corrosion current density (0.4 × 10 −7 A·cm −2 ), while the impedance modulus |Z| at 0.01 Hz for the Ni-Cu/HDTMS-MX coating reaches approximately 375% of that of the Ni Cu coating. The improved corrosion resistance is attributed to the labyrinth-like diffusion barrier introduced by MXene and the HDTMS-derived hydrophobic film, which significantly lowers the surface energy of the coating. Upon contact with aqueous media, the coating maintains a Cassie-Baxter wetting state, indicating stable superhydrophobic behavior. The entrapped air pockets within the hierarchical micro/nanostructure effectively block the penetration of corrosive species, thereby improving corrosion resistance in chloride-containing environments. This work provides a feasible strategy for designing durable superhydrophobic coatings for the long-term protection of carbon steel in harsh marine environments.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
·
IF 19.7
Jiahui Zhan,Ruihong Dai,Baohuan Wei,Ting Sun,Hu Luo,Shumin Li,Xuan Huang,Haozhi Zhou,Lin Xia,Xiaofang Liu,Shunan Zhang,Shicheng Zhang,Hui Wang,Shurong Wang,Yuhan Sun
Co-modified Ni/SiO 2 produces aviation fuel from polyolefins under mild conditions. • Co doping modulates Ni electronic structure to favor internal C-C bond cleavage. • The yield of liquid reaches 82.3% with 79.0% selectivity to the C 8 -C 16 fraction. • Coupled with green energy, the process reduces carbon footprint by 80%. The escalating accumulation of plastic waste poses a major threat to global sustainability. Converting waste polyolefins into aviation fuel offers a promising valorization route, but the challenge remains in overcoming the limited performance of non-noble metal catalysts. Here, a 10Ni-2Co/SiO 2 catalyst was developed that achieved an excellent balance between activity and selectivity for polyethylene hydrogenolysis. Under mild conditions at 280 °C and 3 MPa H 2 , it delivered an 82.3% liquid yield with 79.0% selectivity toward C 8 -C 16 hydrocarbons. The incorporation of Co induced the coexistence of Ni 0 and Ni δ+ species, which may have facilitated internal C-C bond cleavage along the polyethylene backbone. This synergy may have contributed to hydrogen activation and C-C bond cleavage, which may have promoted a continuous “cleavage-hydrogenation-desorption” sequence, thereby helping to suppress excessive chain scission and favoring the selective formation of aviation-fuel-range hydrocarbons. This catalyst also showed broad applicability to other real-life waste polyolefins, and when powered by renewable energy, the process achieved a significantly reduced carbon footprint, offering a sustainable route for plastic upcycling and aviation decarbonization. Download: Download high-res image (175KB) Download: Download full-size image Co-modified Ni/SiO 2 catalyst enables mild and selective hydrogenolysis of waste polyolefins into aviation fuel (C 8 -C 16 hydrocarbons), achieving the highest yield of 65.1%.
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RARE METALS
·
2026
·Vol. 45
·期 6
·e70378
·
IF 12.1
Tao Wen,Xiaohan Chen,Honglin Hu,Xiteng Yan,Krongthong Kamonsuangkasem,Gang Feng,Rongbin Zhang,Runping Ye,Sibudjing Kawi
en This link goes to a English section zh This link goes to a Chinese section Catalytic NH 3 decomposition has garnered substantial attention for hydrogen transformation and storage. Ni-based catalysts continue to suffer from limited thermal stability and suboptimal low-temperature activity, largely attributed to an incomplete understanding of the structure-activity relationships and reaction mechanisms governing their performance. In this study, we designed and constructed a novel Y-Mg bimetallic oxide support system to synergistically modulate the properties of Ni-based catalysts for NH 3 decomposition. Unlike conventional Ni/MgO or Ni/Y 2 O 3 , the precisely tuned Y/Mg ratio in the 20Ni/YMg 8 catalyst creates a unique interface that couples the structural and electronic advantages of both components. A series of Ni-based catalysts with varying Y/Mg ratios was synthesized, and the 20Ni/YMg 8 catalyst with a 1:8 ratio of Y: Mg achieved a hydrogen production rate of 29.77 mmol g cat −1 min −1 at 600°C. Characterizations revealed that Mg incorporation primarily increased surface area and refined Ni dispersion, whereas Y enhanced reducibility and active metal distribution. More importantly, their synergy optimally tailors the electronic structure of Ni and the distribution of basic sites, which collectively promote *NH 2 formation and accelerate N 2 desorption—the rate-determining step. Mechanistic studies confirmed that the optimized catalyst promoted *NH 2 formation and accelerated N 2 evolution, indicating enhanced NH 2 activation and dehydrogenation. This study presents a rational design approach of bimetallic supports to modulate structural and surface properties, offering valuable insights into the development of efficient and stable Ni-based catalysts for ammonia decomposition. 摘要 en This link goes to a English section zh This link goes to a Chinese section 氨催化分解因其在氢能转化与储存方面的潜力而备受关注。镍基催化剂仍面临热稳定性不足和低温活性欠佳的挑战,这主要归因于对其构效关系及反应机理的认识尚不完善。本研究中,我们设计并构建了一种新型的Y-Mg双金属氧化物载体体系,以协同调控镍基催化剂的氨分解性能。与传统的Ni/MgO或Ni/Y 2 O 3 催化剂不同,20Ni/YMg 8 催化剂中精确调控的Y/Mg比例形成了一种独特的界面,耦合了两种组分的结构优势与电子优势。通过合成一系列不同Y/Mg比例的镍基催化剂,我们发现Y:Mg比例为1:8的20Ni/YMg 8 催化剂在600°C时达到了29.77 mmol g cat −1 min −1 的产氢速率。表征结果显示,Mg的引入主要增加了比表面积并优化了Ni的分散性,而Y则增强了还原性和活性金属分布。更重要的是,二者的协同作用精准调控了Ni的电子结构和碱性位点分布,共同促进了NH 2 的形成并加速了N 2 脱附(速率控制步骤)。机理研究证实,优化后的催化剂促进了 NH 2 的形成并加快了N 2 的生成,表明NH 2 的活化和脱氢过程得到增强。本研究为双金属载体的理性设计以调控结构及表面性质提供了新思路,为开发高效稳定的氨分解镍基催化剂提供了重要见解。
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高影响因子
Molecular Catalysis
·
2026
·
IF 4.3
Zhiqin Li,Tengran Luo,Yuxin Kang,Zegang Qiu,Xin Wang
Ni effectively reduces the surrounding electron density of Co and enriches defects in catalyst. • Ni introduction strengthens adsorption of vanillin and H 2 while facilitates desorption of reaction intermediate. • 4Co-1Ni/NPC achieves complete conversion of vanillin with 100% selectivity towards MMP, outperforming Co/NPC catalyst. • Ni incorporation enhances ability of 4Co-1Ni/NPC to cleave C O bond of intermediate. The development of cost-effective catalysts for the selective hydrodeoxygenation (HDO) of biomass-derived platform molecules is crucial to sustainable biorefining. Herein, a series of Co-Ni bimetallic catalysts supported on N-doped porous carbon were rationally designed via pyrolysis of bimetallic Co-Ni zeolitic imidazolate framework (ZIF) with tunable metal ratios. Comprehensive characterization confirmed that Ni incorporation modulated the electronic structure of Co, promoted metal dispersion, generated abundant defect sites, and enriched the surface concentration of metallic Co 0 and Ni 0 species. The optimal 4Co-1Ni/NPC catalyst exhibited a unique layered architecture, a high surface area, and superior capacity for hydrogen activation. Density functional theory (DFT) calculations revealed that Ni introduction effectively lowered the local electron density of Co, which fundamentally adjusted the adsorption/desorption energetics—strengthening the binding of vanillin and H 2 while facilitating the desorption of the target product 2‑methoxy-4-methylphenol (MMP). Under mild conditions the 4Co-1Ni/NPC catalyst achieved complete vanillin conversion with nearly 100% MMP selectivity, significantly outperforming its monometallic counterparts. Moreover, it demonstrated excellent recyclability over five consecutive runs and broad substrate tolerance toward various lignin-derived aldehydes. The reaction was verified to proceed via 4‑hydroxy‑3‑methoxybenzyl alcohol (HMP), with C–O bond cleavage in HMP identified as the rate-determining step. This work elucidates the synergistic mechanism in Co-Ni bimetallic systems and provides a principled design strategy for developing high-performance, non-noble metal catalysts for selective biomass valorization. Download: Download high-res image (176KB) Download: Download full-size image
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ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Hong-Mei Jiang,Jian Sheng,Shu-Zhen Zhou,Hang Yao,Fan Tang,Dongqi Wang
Developing high-performance, non-precious-metal catalysts that operate efficiently at low temperatures remains a pivotal challenge for CO2 methanation, particularly for systems with high active metal loadings where nanoparticle sintering often compromises performance. Herein, Mn-promoted Ni/ZrO2 catalysts with 40 wt % Ni were prepared via a Pechini method, demonstrating exceptional low-temperature performance. Under atmospheric pressure, the optimized 5Mn–Ni/ZrO2 catalyst achieved stable 70% CO2 conversion, near-100% CH4 selectivity, and a stable CH4 yield of 150 mmol/g/h for 117 h at 225 °C. Comprehensive characterization (XRD, TEM, XPS, H2-TPR, CO2-TPD, H2-TPD) revealed that Mn doping facilitates NiO reduction with higher Ni dispersion, increases electron density on Ni sites, and increases the population of medium-strength basic sites and oxygen vacancies on the ZrO2 support. These synergistic modifications collectively promote CO2 adsorption, H2 adsorption, and catalyst reducibility. In situ DRIFTS further identified a formate-mediated pathway, in which Mn promotes the stabilization and subsequent hydrogenation of the HCOO* intermediate. This work demonstrates that rational exploitation of promoter-support synergy can overcome the dispersion limitations inherent to high-loading Ni catalysts, providing an effective design strategy for advanced, low-temperature CO2 methanation catalysts.
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高影响因子
AICHE JOURNAL
·
2026
·
IF 4.4
Zhou Chen,Shengyao Lv,Zhongyao Zhang,Wenyao Chen,Gang Qian,Jing Zhang,Xinggui Zhou,De Chen,Weikang Yuan,Xuezhi Duan
Alkylation of amines with alcohols offers a sustainable route featuring high atom economy and minimal waste, yet remains kinetically challenging due to the inertness of alcohols and the need for coordinated activation of multiple sites. In this work, we report a strategy of engineering Ni/NiAl m O heterojunction structure that synergizes Ni 0 and Ni(Al)O sites toward efficient N-alkylation. A series of Ni/NiAl m O catalysts with varied Ni/Al ratios were prepared by coprecipitation and characterized. The results show a gradual evolution of the oxide phase from Ni(Al)O toward NiO with decreasing Al content, with Ni/NiAl 0.5 O exhibiting the most apparent Ni/Ni(Al)O heterojunction and the highest catalytic activity. Density functional theory calculations demonstrate that Ni(Al)O lowers the barrier for O H cleavage in ethanol relative to NiO, thereby cooperating with Ni 0 sites for subsequent C H activation. This multisite synergistic strategy provides a new avenue for the rational design and preparation of efficient N-alkylation catalysts.
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Journal of Cleaner Production
·
2026
·
IF 10.7
Shuangyong Su,Yuxiang Hou,Hangyu Duan,Tianyi Li,Jin Chen,Hongpeng Jia
Monolithic inverse catalysts were fabricated by optimizing treatment conditions. • O V generation could be significantly promoted by optimizing inverse structure. • Alternating magnetic field could enhance charge transfer across inverse interface. • Magnetocatalytic oxidation required lower temperatures than traditional heating. • Magnetocatalytic purification encompassed demands of intermittent VOCs source. Catalytic oxidation is widely employed in volatile organic compounds (VOCs) degradation. The continuous optimization of catalytic oxidation technology encompasses the materials design and heat sources innovations. Herein, we found that adjusting the temperature and H 2 treatment could regulate inverse structure of CoO x /Ni foam (CoO x /NF) monolithic catalysts, resulting in enhancement of oxygen vacancies generation. This promotional effect could be further amplified by electromagnetic induction heating (EMIH), which was probably ascribed to the acceleration of charge transfer across the inverse interface induced by alternating magnetic field. Consequently, CoO x /NF-300R, as an inverse catalyst synthesized under optimized conditions, could exhibit superior activity for catalytic oxidation of VOCs including benzene, toluene and o -xylene. The demanded temperature for removal of toluene in EMIH mode was reduced by approximately 50°C compared to that in traditional heating mode. Furthermore, the VOCs catalytic oxidation system composed of CoO x /NF-300R and electromagnetic induction could meet the requirements for rapid and efficient purification of multi-species and intermittent pollution sources. Download: Download high-res image (375KB) Download: Download full-size image
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高影响因子
JOURNAL OF THE ENERGY INSTITUTE
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2026
·
IF 6.5
Daoheng Zhang,Jiawei Zhang,Jian Xing,Zhuozhi Wang,Xingcan Li,Shuai Guo
One-step flotation–activation for CGFS-derived catalysts. • Ni- and K-modified catalysts show distinct reforming pathways. • Ni-based catalysts achieve high tar conversion (97.2%) with coke resistance. • K favors CH 4 formation while Ni enhances H 2 -rich syngas production. Efficient and stable catalysts are essential for biomass-tar reforming in sustainable biomass gasification systems that utilize low-cost solid waste feedstocks. In this study, coal gasification fine slag (CGFS) was processed by saline flotation to enrich the residual carbon fraction and remove ash content, yielding a support material with enhanced catalyst surface area and pore volume. Low-concentration saline flotation produced supports with greater specific surface areas (S BET ), while high-concentration saline flotation yielded catalysts with superior catalytic performance. Catalytic performance was primarily determined by the nature of the metal loading. Ni-loaded catalysts (Ni4) achieved higher tar-conversion rates and CO yields than K-loaded counterparts (K4), with substantially greater H 2 production. Conversely, K4 produced higher CH 4 yields than Ni4, attributable to enhanced high-temperature methanation leading to higher CH 4 selectivity, whereas Ni-based catalysts showed superior overall catalytic performance and anti-coking ability, attributable to their unique FeNi 3 alloy active centers. Furthermore, regeneration tests demonstrated that both Ni4 and K4 catalysts retained considerable tar conversion capability after three reaction–regeneration cycles, highlighting their potential for cyclic utilization. These results demonstrate the potential of CGFS as a low-cost tar conversion catalyst. Download: Download high-res image (462KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Tiancong Hao,Yuhang Liu,Peili Zhang,Yuhang Xiang,Xiaoning Yang,Qingya Sun,Aming Xie
Magnetic-dielectric synergy is critical to the electromagnetic wave absorption (EWA) performance of carbon/metal absorbers and is closely related to their nanoscale structure. In this work, aromatic dianhydrides with different conjugation lengths (PMDA, NTDA, and PTCDA) were used for ligand engineering of phthalocyanine-derived Ni/C nanocomposites, yielding Ni/C-PMDA, Ni/C-NTDA, and Ni/C-PTCDA. The resulting nanostructural variation regulated carbon ordering, Ni dispersion, and interfacial coupling at the Ni/C heterointerface, thereby redistributing dielectric and magnetic loss behavior. As a result, Ni/C-PMDA shows deep absorption with a reflection loss of −53.30 dB at 2.99 mm, while Ni/C-NTDA achieves a wide effective absorption bandwidth of 6.00 GHz at a thin thickness of 1.92 mm. Moreover, far-field radar cross section simulations on a Ni/C nanocomposite-coated perfect electric conductor (PEC) plate show reduced scattering compared with bare PEC. This work offers a ligand engineering strategy for designing Ni/C nanocomposites with optimized magnetic–dielectric synergy for electromagnetic wave absorption.
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危险品化学品经营许可证（带存储）