CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Lisong Zhong,Ying Li,Lirong Zheng,Jian Sun,Zhaohui Jin,Linqi Shi,Pengcheng Zhao,Baoyu Qi,Liu Yang,Zhongwei Chen
The development of highly active and robust non-noble-metal catalysts for alkaline hydrogen evolution reaction (HER) is imperative for industrial anion exchange membrane water electrolysis (AEMWE). Herein, we construct a hierarchically multiphase heterostructure via a customized reduction strategy, featuring uniformly dispersed Cu and Ni metallic phases anchored onto a conductive isolated MoO 2 substrate (Cu/Ni@MoO 2 ). The catalyst achieves an ultralow overpotential of 140.7 mV at 1 A cm −2 in 1 M KOH, coupled with ampere-level operational stability exceeding 2000 h without degradation. In-situ Raman spectroscopy and theoretical analyses unveil that Cu-mediated interfacial engineering dynamically restructures interfacial water networks, reduces the water dissociation barrier and optimizes hydrogen adsorption energy. Impressively, the AEMWE device equipped with a Cu/Ni@MoO 2 cathode achieves the industrial-relevant current densities 1.74 A cm −2 and 3.61 A cm −2 at the voltages of only 1.8 V and 2 V (60 °C), respectively, while demonstrating exceptional durability with negligible voltage decay throughout 1000 h operation at 0.5 A cm −2 . This work presents a novel design strategy for high-current-density electrocatalysts, bridging atomic-scale insights and industrial hydrogen production requirements.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Xianmin Gong,Yujie Guo,Haijiao Sun,Hao Chen,Yi He,Wenru Zhang
The development of environmentally friendly anticorrosion coatings is of great significance for pipeline corrosion protection and marine environmental protection. The introduction of nontoxic inorganic nanomaterials into the Ni-W plating layer has great potential for enhancing corrosion resistance. However, the application of traditional Ni-W/ZrO 2 plating layer is limited by the large mass of ZrO 2 particles, easy to settle, poor dispersion in the plating solution, and insufficient corrosion resistance. In this study, polydopamine-functionalized ZrO 2 composite particles were prepared by surface modification of ZrO 2 with dopamine. These particles were embedded into Ni-W plating to form a new environmentally friendly anticorrosive Ni-W/P-ZrO 2 plating, and the PDA modification effectively improved the dispersion stability of ZrO 2 in the Ni-W plating solution. Owing to the synergistic effect of the physical barrier effect of ZrO 2 and the chemical corrosion inhibition of PDA, the Ni-W/P-ZrO 2 plating exhibits excellent corrosion resistance in 3.5 wt% NaCl solution, with a corrosion rate as low as 0.0466 mm/y, which is 64.83 % lower than that of Ni-W plating (0.1325 mm/y) and 22.55 % lower than that of Ni-W/ZrO₂ plating. Tribological tests showed that the Ni-W/P-ZrO 2 plating had a lower average coefficient of friction (COF = 0.343) and a smaller wear area (7.23E-5 mm 2 ). These results confirm that the introduction of P-ZrO 2 significantly improved the corrosion protection and wear resistance of the Ni-W coatings.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Zhi-qiang Wang,Sonil Nanda,Gong-xun Xu,Janusz A. Kozinski,Zhen Fang
Ni–Ce bimetallic material was supported on Kaolin by impregnation, calcination, and reduction for hydrothermal gasification of crop residues at 340–400 °C and 16–30 MPa. According to orthogonal experiments, the optimal reaction conditions were determined to be 380 °C, 5 min, 0.5 g cotton stalk and 0.5 g catalyst. H 2 yield was enhanced from 1.85 mmol/g to 21.82 mmol/g, with the specific surface area increasing from 4.74 m 2 g −1 (Bulk Ni) to 26.46 m 2 g −1 (Ni–Ce/c-Kaolin catalyst), indicating that Kaolin improved the dispersion of active Ni species. The bimetallic Ni–Ce synergy is reflected by broader reduction peaks of the Ni–Ce catalyst in H 2 -TPR. The variation of cerium valence states in XPS revealed that Ce is dynamically involved in oxygen transfer, promoting catalytic activity in coexisting Ce 3+ /Ce 4+ oxides. The Ni–Ce/c-Kaolin catalyst developed in this study provides an efficient route to hydrogen production from agricultural waste, thereby demonstrating its potential for high-value conversion of sustainable biomass resources.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Dongqing Li,Zhaohui Chen,En Zhao,Yanmei Zheng,Lin Dong,Wenjun Zhang,Zupeng Chen
Amino acids, as essential nitrogen-containing compounds, hold significant importance in pharmaceutical and advanced material applications. In this study, we develop a nickel nanoparticle-decorated cadmium sulfide (Ni/CdS) photocatalytic system for the efficient conversion of biomass-derived hydroxyl acids under mild conditions. The optimized catalyst exhibits exceptional performance in the reductive amination of lactic acid to alanine, achieving a reaction rate of 61.0 mmol·g cat −1 ·h −1 with 92.5 % selectivity, outperforming previously reported noble metal-based catalysts. Furthermore, comprehensive characterizations demonstrate that the unique ultrathin nanosheet morphology of the catalyst facilitates efficient charge carrier transport, while the incorporated nickel species act as an effective electron mediator, synergistically enhancing the photocatalytic activity. This work provides a sustainable and scalable approach for amino acid synthesis, highlighting the potential of non-precious metal photocatalysts for high-value transformation of biomass.
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PubMed
高影响因子
ACS Nano
·
2025
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IF 16
Kang Lian,Sanshuang Gao,Wenxian Liu,Qian Liu,Yanhong Feng,Jun Luo,Guangzhi Hu,Ke Chu,Dingsheng Wang,Xijun Liu
The combination of CO2 fixation and small organic molecule oxidation offers a promising solution to increasing severe environmental issues and energy crises. Here, low-coordinated NiN3 sites were anchored onto nitrogen-doped ordered mesoporous carbon (Ni-SAs/NOMC), which is capable of efficiently catalyzing the coupled methanol oxidation reaction and CO2 reduction reaction (MOR||CO2RR), thereby reducing the energy required for CO2 conversion and enhancing the economic value of the CO2 electrolytic system. In the membrane electrode assembly electrolyzer-based MOR||CO2RR, Ni-SAs/NOMC achieved Faradaic efficiencies (FEs) of 95.4% for formate at the anode and 96.3% for CO at the cathode. Moreover, at a current density of 0.8 A cm–2, Ni-SAs/NOMC demonstrated stable electrolysis for up to 100 h, with FEs at both the anode and cathode remaining stable at approximately 90%. In situ spectroscopy analyses and theoretical calculations identified the formation of critical intermediate species and the origin of activity improvement, guiding the development of efficient electrosynthesis of valuable chemicals.
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高影响因子
Small Methods
·
2025
·Vol. 9
·期 9
·e00684
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IF 9.1
Guojun Han,Mohamed A. Tamerd,Ling Gao,Qingsheng Guo,Cong Feng,Menghao Yang,Guoxing Miao,Jing Fu
Efficient oxygen reduction reaction (ORR) is crucial for energy conversion technologies, yet its sluggish kinetics remain a significant challenge. Beyond optimizing the catalyst's intrinsic properties, field effects can also profoundly impact the microenvironment at the catalyst/electrolyte interface, thereby affecting electrocatalytic performance. This study explores the tip-enhanced ORR by leveraging the coupled effects of electric and magnetic fields at the reaction interface. The Pt-loaded ferromagnetic Ni cone electrode generates strong localized electric fields that reorganize interfacial water molecules into a more ordered structure. This strengthens hydrogen bonding between the electrolyte and reaction intermediates, which in turn facilitates proton-coupled electron transfer and accelerates the rate-limiting *OH desorption into interfacial water matrix. Additionally, the amplified electric fields at tips accelerate OH − electromigration away from the catalyst surface, while the migration current couples with the concentrated magnetic fields near tips to drive strong magnetohydrodynamic flows. These intensified flows effectively enhance O 2 molecule delivery to wider electrode surface and facilitate better OH − product removal, thus improving the overall reaction efficiency. This strategy of concentrating both E/M fields using the field-effect catalyst optimizes the ORR kinetics at the interface as well as the mass transport dynamics near interface, offering an effective approach for advancing ORR performance.
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PubMed
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Green Chemical Engineering
·
2025
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IF 7.6
Jiankun Yu,Weixiao Sun,Kuan Huang,Jin Xu,Fuzeyu Zhong,Xiaohu Ge,Wenyao Chen,Gang Qian,Yueqiang Cao,Jianrong Zeng,Jianbo Ma,Xinggui Zhou,Xuezhi Duan,Jing Zhang,Lilong Jiang
Due to escalating carbon emissions, increasing attention is being focused on the synthesis of biomass-derived liquid fuels with a low CO 2 footprint. Currently, the dominant biobased liquid fuel in the diesel range is green diesel, produced via deoxygenation of non-edible natural/waste oils and their free fatty acid components into engine-compatible diesel-range alkanes. Industrially, sulfided NiMo or CoMo catalysts are typically used, leading to total hydrocarbon yields of 70-80 wt%. However, their inevitable sulfur leaching often contaminates the products and requires the addition of sulfur-containing agents. Here, we developed a highly selective sulfur-free Ni-Cu alloy catalyst by disentangling the electronic and size effects, to enable green diesel synthesis through the decarbonylation of palmitic acid—the most common fatty acid in these feedstocks. An unprecedented decarbonylation product (pentadecane) yield of 98% (on a molar basis) was achieved using a Ni-Cu alloy catalyst with a Ni/Cu ratio of 1:1 under mild reaction conditions (2 MPa H 2 , 250 °C). Minimal metal sintering or leaching was observed after multiple reuses. Kinetic studies show that incorporating Cu into Ni markedly reduces both the apparent activation energy and the reaction order for the conversion of palmitic acid. These results, combined with catalyst characterization, reveal that introducing Cu into Ni not only facilitates the adsorption and activation of the carboxylic hydroxyl group to promote the reductive deoxygenation of palmitic acid into aldehyde/alcohol intermediates—the slow step in decarbonylation—but also weakens the adsorption of C–C bonds on Ni by enhancing its electron density.
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JOURNAL OF THE INDIAN CHEMICAL SOCIETY
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2025
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IF 3.4
Wei Wang,Ming Yin,Qichao Wu
Nickel-based coatings are known for their exceptional properties and high microhardness, making them widely used to enhance the surface performance of metal components. In order to investigate the effect of pulse current densities ( I D ) on the performance and structure of the coatings, the Ni/W–TiN coatings were prefabricated on a 45 steel substrate by using a pulse electrodeposition (PED) approach. The study examines how varying pulse current densities ( I D ) impact the coatings' microstructure, microhardness, phase composition, and wear/corrosion resistance. Among the coatings tested, the one deposited at an I D value equal to 0.5 A/dm 2 revealed the best structure, with average sizes of 66.4 nm for Ni–W grains and 39.3 nm for TiN nanoparticles. XRD patterns revealed characteristic peaks at 43.8°, 50.5°, and 74.2°, corresponding to the (1 1 1), (2 0 0), and (2 2 0) planar directions of Ni–W. The value of pulse I D significantly influenced the microhardness value of the coatings. The sample deposited at 0.1 A/dm 2 showed a microhardness of approximately 675.4 HV, while the coating formed at 0.5 A/dm 2 showed the highest microhardness at around 834.9 HV. Moreover, Ni/W–TiN coating deposited at 0.5 A/dm 2 showed the lowest corrosion value equal to 0.71 A/cm 2 .
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Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 8
·4893-4902
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IF 10.7
Zhao Sun,Yunhan Gong,Dongfang Cheng,Zhiqiang Sun
Catalytic methane decomposition shows the prominent superiority of generating hydrogen in one step with almost no carbon oxide production; however, it suffers from catalyst deactivation and low by-product carbon quality. Herein, a series of H2-reduced NixCr2Ox+3 (abbreviated as reduced NixCr2) catalysts were designed and synthesised for highly efficient methane decomposition and carbon nanotube production. A maximum methane conversion of 87.1% and hydrogen concentration of 91.8 vol% were achieved at 750 °C without deactivation. The results from XPS, XAS, and Raman reveal that the reduced NixCr2 catalysts have significant activity and stability. On the one hand, they form the Cr–O–Ni structure, thus possessing strong Ni–Cr2O3 interaction. On the other hand, the lattice oxygen of the reduced NixCr2 catalysts induces methane activation, thus accelerating methane activation, as demonstrated by the generation of a little amount of CO. In addition, the relationship between the types of carbon deposited and Ni/Cr ratio, decomposition temperature, and time was also revealed to guide carbon nanotube synthesis. Density functional theory calculation confirms the lowest dehydrogenation barrier of Ni(111)/Cr2O3(012), demonstrating the superiority of the Cr–O–Ni catalyzed methane decomposition. These findings provide innovative ideas for the construction of functionalized materials, which will substantially promote the development of methane decomposition.
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MATERIALS RESEARCH BULLETIN
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2025
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IF 5.7
Xinqi Zhang,Bingxin Wang,Dawu Shu,Wanxin Li,Fangfang An,yueyong Dong
Dyeing wastewater, a common type of wastewater in the textile industry, has a complex composition, deep color, and poor degradability. In this work, hydrothermal method was employed to synthesize Ni@MXene catalysts, and their performance in the Ni@MXene/PMS (peroxymonosulfate) system was investigated. A mixed system containing 7.5 g/L PMS and 0.2 g/L Ni@MXene was stirred for 60 min at 25 °C and pH 6, achieving a degradation percentage of 93.66%, ‧OH are the primary active species in this catalytic system, and the anion has minimal interference with the degradation process. The degradation percentage of the Ni@MXene catalyst can still reach 88.23 % after 3 times of recycling, and the degraded dyeing wastewater can be used for dyeing cotton fabrics. In conclusion, the catalyst demonstrates exhibits significant potential for dye degradation and wastewater recycling, providing valuable insights for energy conservation and emission reduction.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Hengrui Li,Yuchen Niu,Weiyue Hu,Zihao Tao,Yi Qin,Ruiqing Yao,Wenhong Li,Liuyi Pan,Hedan Yao,Dong Li
The highly selective semi-hydrogenation of acetylene in ethylene-rich streams is essential for polyethylene production. However, environmentally friendly non-precious metal catalysts are often limited by the difficulty of balancing activity and selectivity. This study employed a facile in-situ pyrolysis strategy of MOFs to successfully prepare a Ni/ [email protected] heterojunction catalyst. This catalyst exhibited outstanding performance in acetylene semi-hydrogenation, achieving an acetylene conversion of 96.16 % and ethylene selectivity of 87.22 %. Mechanistic studies revealed that its superior performance originates from highly dispersed H 2 activation sites and a unique interfacial synergistic effect. On the one hand, the strong interfacial interaction formed between Ni and ZnO not only significantly enhances the dispersion and air stability of the active Ni 0 species but also effectively promotes the activation and dissociation of H 2 molecules. On the other hand, the electron reconstruction induced by the Ni/ZnO interface significantly reduces the energy barrier of the rate-determining step promotes the rapid desorbed of the product ethylene, and inhibits excessive hydrogenation. This work provides a novel heterojunction engineering strategy for designing highly efficient, stable, and sustainable non-noble metal selective hydrogenation catalysts.
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RARE METALS
·
2025
·
IF 11
You Lv,Qiang Yang,Jixing Zhu,Dongyue Zhao,Junyuan Fan,Valery Konstantinovich Sheleg,Xin Qiu
en Mg−Ni−Y alloy is considered to be one of the most promising hydrogen storage materials, but its high dehydrogenation energy barrier hinders its practical application. A dual-stage heat treatment (490°C × 4 h + 550°C × 4 h) is applied to optimize the microstructure and hydrogen storage performance of a vacuum-melted Mg 94 Ni 3 Y 3 alloy. This process induces a two-level phase transformation of the long-period stacking ordered (LPSO) structure (18R + 14H→14H→18R), facilitating Ni/Y atom pre-distribution via stacking fault recombination at 490°C and promoting a eutectic-like reaction at 550°C. As a result, a large-scale eutectic-like structure composed of finely dispersed and uniformly interwoven Mg 2 Ni and LPSO phases is formed, characterized by a high density of phase boundaries. The optimization of the microstructure directly leads to the enhancement of hydrogen storage performance, as evidenced by a reduction in dehydrogenation activation energy from 139.7 to 113.5 kJ mol −1 and a decrease in enthalpy change from 85.8 to 71.7 kJ mol −1 . This work demonstrates a convenient microstructure regulation strategy, which is expected to advance Mg−Ni−Y alloys toward industrial applications. 摘要 zh Mg−Ni−Y 合金因其优异的储氢潜力而备受关注,但较高的脱氢能垒仍制约其工程化应用。针对真空熔炼的Mg 94 Ni 3 Y 3 合金,本研究采用双阶段热处理工艺(490°C×4 h+550°C×4 h)调控其显微组织与储氢性能。结果表明,该工艺诱导长周期堆垛有序(LPSO)结构经历两级相变过程(18R+14H→14H→18R):在490°C通过层错重组实现Ni/Y原子的预分布,在550°C进一步促进类共晶反应的发生。由此形成的大尺度类共晶组织由细小弥散且均匀交织的Mg 2 Ni相与 LPSO 相构成,具有高密度相界特征。显微组织的显著优化有效降低了脱氢活化能(由139.7降至113.5 kJ mol −1 )和焓变(由85.8降至71.7 kJ mol −1 ),从而提升了储氢动力学性能。本工作提出了一种简便高效的组织调控策略,为Mg−Ni−Y合金的工程化应用提供了新思路。
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危险品化学品经营许可证（带存储）