JOURNAL OF CATALYSIS
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2025
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IF 6.5
Ziyang Xu,Liang Chen,Chunbo Wang
Reaching high activity over Ni-based catalysts for CO 2 methanation at lower temperature remains a critical challenge. Herein, a surface hydroxylation strategy was developed to enhance the catalytic performance of Ni catalysts under mild conditions. By treating γ-Al 2 O 3 with H 2 O 2 solutions of varying concentrations, the surface hydroxyl (–OH) group density was effectively tuned. Catalytic evaluations revealed that hydroxylation of the support significantly enhances CO 2 methanation performance. Among the series, Ni/A-OH-6 exhibited the highest activity, achieving a turnover frequency (TOF) of 2.129 h −1 at 240 °C, approximately eight times higher than that of the unmodified Ni/A catalyst (0.266 h −1 ), thereby demonstrating a remarkable enhancement in intrinsic activity. Comprehensive characterizations demonstrated that surface –OH significantly enhanced CO 2 adsorption via the formation of HCO 3 * species. In situ DRIFTS studies further confirmed that hydroxyl-induced HCO 3 * species convert more readily to HCOO*, facilitating the hydrogenation pathway and thus contributing to the improved low-temperature activity. This work highlights surface hydroxyl engineering as a simple yet effective approach to boost catalytic efficiency, delivering guidance for the rational development of high-efficiency CO 2 utilization catalysts.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Dawei Lu,Wen Meng,Xiaowei Wen,Feng Li,Taohai Li
Herein, an Ag/Ni(dmgH) 2 photocatalyst was constructed through a controllable silver modification strategy. The combination of the local surface plasmon resonance (LSPR) effect of Ag nanoparticles and the synergistic catalytic effect of Schottky junctions significantly enhanced photogenerated carrier separation. Under optimized conditions, the Ag/Ni(dmgH) 2 system achieved a remarkable hydrogen evolution rate of 922.2 μmol/g/h under visible light, approximately 16.7 times higher than the unmodified system. Furthermore, the Ag/Ni(dmgH) 2 film fabricated via screen-printing technology effectively utilized enhanced light absorption from LSPR and efficient interfacial electron transport from Schottky junctions, achieving degradation rates of 98.9 % for Rhodamine B and 86.9 % for Quinoline Blue. The film retained 86.9 % of its activity after four cycles, demonstrating excellent recyclability. This work highlights the dual application potential of Ni(dmgH) 2 materials for photocatalytic energy conversion and environmental remediation.
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Bioresource Technology Reports
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2018
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IF 0
Hao Li,Zhiling Liu
Hydrodeoxygenation (HDO) is one of the most promising technologies for the biomass pyrolysis oil upgrading, but substantial challenges for the development of efficient HDO catalysts still remain. In this work, the nickel catalysts supported on carboxylic carbon nanotube (Ni/CCNTs-X, X = 1, 2, 3, 4 and 5) with different diameter have been synthesized for the HDO of model compound (vanillin) to p -creosol. As the tube diameters of Ni/CCNTs-X catalysts increased, the catalytic activity increased firstly, and then decreased. The conversion of vanillin over Ni/CCNTs-4 catalyst reached up to 90.0% under mild reaction condition, with a concomitant 87.7% selectivity of p -creosol. The transformation pathway for the HDO of vanillin over Ni/CCNTs-X catalysts involve in hydrogenation, hydrogenolysis and etherification .
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CARBON
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2020
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IF 8.821
Zhichao Miao,Jian Meng,Manfen Liang,Zhenbin Li,Yuzhen Zhao,Fangyuan Wang,Leilei Xu,Jinglin Mu,Shuping Zhuo,Jin Zhou
For the electro-reduction of CO 2 to syngas , the fabrication of electrodes with excellent and adjustable catalytic performance is a critical step. In this work, Ni particles encapsulated in N-doped carbon nanotubes on carbon paper (Ni@N-CNTs/CP) composites were designed and prepared via an in-situ chemical vapor deposition method. As confirmed by different characterization techniques, the Ni@N-CNTs are successfully synthesized, and the surface of the CP is evenly covered by the Ni@N-CNTs. The effects of Ni content and treating temperature on the textural properties of composites are carefully investigated. The Ni@N-CNTs/CP composites are directly employed as the electrode for electro-reduction of CO 2 , and the action mechanisms of the N species, Ni particles, and N-CNTs structure are explored as well. The electrode exhibits excellent catalytic activity and high stability, reaching a specific current of 10 mA cm −2 . The H 2 /CO ratio in the achieved syngas can be tuned in the range of 5/1 to 1/1.5.
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JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Danmin Cai,Meiting Gao,Sifei Luo,Xueyin Wu,Yuhan Yang,Yong Xie,Licai Zhu,Xiaolong Deng,Yajuan Ji,Zhongzhi Yuan
We have applied a scalable multilayer coating method to design three porous cathodes (90 μm thickness, areal loading ca. 25 mg cm −2 , areal capacity ca. 5.3 mAh cm −2 ) based on LiNi 0.9 Co 0.05 Mn 0.05 O 2 active materials in the form of small single-crystal (SSC) particles, large polycrystalline (LPC) secondary particles, and small polycrystalline (SPC) secondary particles. The V-type electrode facilitates Li + transport, has a high characteristic thickness (46–57 μm), long cycle life with an active material utilization of 49.67% and a capacity retention of 88.24% after 100 cycles. The A-type electrode exhibits restricted Li + transport, lower characteristic thickness (23–30 μm), fast cyclic capacity decay with an active material utilization of 26.31% and a capacity retention of 68.76% after 100 cycles. The small particles on the upper layer of the A-type electrode exhibit high-rate characteristics, exceeding 82.5% of the discharge capacity of a single-layer electrode with a uniform mixture of LPC and SSC at a 4C discharge rate. The combination of SSC and LPC particles facilitates high specific energy and cycling stability with optimum stability when stored at 60 °C under 100% state of charge (SOC). The design strategy that is proposed offers a commercial route to boosting battery energy density from 220 Wh kg −1 to above 300 Wh kg −1 .
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Journal of Manufacturing Processes
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2020
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IF 4.086
Xiaoping Cai,Keer Li,Changcheng Sang,Xuanru Ren,Leihua Xu,Peizhong Feng
The dissimilar metals joining of Ti/Cu was conducted using a rapid thermal explosion (TE) reaction. The Ni-Al powder mixture was used as TE reaction system, and the effect of temperature (600, 700, 800 and 900 °C) on interfacial diffusions, microstructure and mechanical properties of Ti/Cu joint were investigated. The maximum combustion temperature of Ni-Al interlayer during heating process was 720 °C and a significant exothermic phenomenon was observed for 5 s. The infiltration of melted Al into the Ti/Cu substrate and formed a continuous transition region at the interface of the joints were the dominant joining mechanisms. Microhardness of the interlayer after heated at 900 °C for 30 min possessed prominent improvement from 32.6 to 101.7 HV due to the completely phase transformation of Ni-Al interlayer, which composed of main phase NiAl and minor phase Ni 3 Al. The bond strength of the joint was checked to assess the joint quality. For the joint processed by 900 °C for 30 min, the maximum shear strength of Ti/NiAl and Cu/NiAl were 33.4 MPa and 39 MPa, respectively.
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Journal of Energy Storage
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2023
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IF 9.4
Xiaowei Wu,Xin Dong,Ziqin Liu,Xinyi Wang,Pu Hu,Chaoqun Shang
Although the Li metal anode has a high theoretical capacity and low potential, the uncontrolled growth of Li dendrites and the significant volume variation of the Li anode prevent the practical deployment of lithium metal batteries (LMBs). To effectively control the Li dendrite growth with suppression, in this contribution, the Ni(OH) 2 nanosheets modified Prussian blue tubes (PBT/Ni(OH) 2 ) are employed to construct a three-dimensional framework (3D) on the surface of Li. The PBT can homogenize the Li + flux, while the Ni(OH) 2 nanosheets provide sufficient space to accommodate the volume change of Li. Thus, the growth of Li dendrites is largely suppressed compared to pristine Li. In detail, with the introduction of PBT/Ni(OH) 2 , the Li||Li cells provide 500 h of consistent cycling performance at 1 mA cm −2 , while the Li||Li 4 Ti 5 O 12 (LTO) cells also exhibit superior cycle reversibility over 450 cycles at 175 mAh g −1 .
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Materials Today Energy
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2020
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IF 5.604
Ziqi Zhang,Linchuan Cong,Zhuochen Yu,Lina Qu,Weimin Huang
Hydrogen is one of the most desirable sources with large energy density . Electrocatalysis of hydrogen evolution reaction is a promising way to produce hydrogen since it can be powered by renewable energy such as solar and wind energy . However, the mainstream electrocatalyst is noble metal (Pt/Ru/Ir), which is expensive and rare. It is necessary to develop non-noble metal catalysts toward HER from the perspective of sustainable development and long-term environmental conservation. Therefore, this paper provides a cheap and feasible way to synthesize the Fe–Ni bimetallic N-doped carbon framework (Fe–Ni@NCF). The prepared Fe–Ni@NCF exhibits the desired overpotential of 219 mV at 10 mA cm −2 in alkaline and 259 mV at 10 mA cm −2 in acidic solution, respectively. Besides, it exhibits similar current density loss as commercial Pt/C after 10,000 segments of CVs, which suggests satisfactory durability.
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APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Li Li,Kaikai Chang,Ping Fang,Kui Du,Chaogui Chen,Shaodong Zhou,Chao Shen,Wensheng Linghu,Guodong Sheng,Tasawar Hayat,Xiaojie Guo
Intending to remove Ni(II) from wastewater, porous p-BN was employed to recovery Ni(II) by batch and X-ray photoelectron spectroscopy technique. The performances and mechanism of p-BN for Ni(II) sorption had been studied by diverse characterization technologies. The kinetic data was calculated to conform a pseudo-second-order model, and isotherm data fitted to a Freundlich equation. We obtained a high removal rate and a high adsorption capacity. A possible mechanism can be expressed from XPS results. The surface of p-BN is B OH/B NH 2 enriched and exhibits a weak alkalinity. When p-BN contact with Ni(II) solution, the hydroxide ions releases from the surface while there is a formation of B O⋯Ni; the small group of B O⋯Ni is acting with hydroxide ions, thereby forming B O⋯Ni(OH) 2 and continuously adsorbs Ni(II) to form B O⋯Ni(OH)ONi(OH) like as precipitated nucleus. Then, due to the interaction of hydroxyl-O with electron-deficient B, the veil-like Ni(OH) 2 generated from precipitated nucleus evenly attaches to p-BN. The bonding state of Ni(II) on p-BN by XPS spectra revealed that the process of adsorbing Ni(II) onto p-BN was chemisorption through the formation of Ni(OH) 2 and the interaction between hydroxyl-O and electron-deficient B. The analyses implied that p-BN is a promising candidate for recovery of Ni(II) from wastewater.
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ChemElectroChem
·
2017
·Vol. 4
·期 9
·2314-2320
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IF 4.136
Cong Zhou,Lina Lin,Yuzhu Ma,Liyan Huang,Jun Li,Zhengping Liu,Zhaoxia Dong
The amorphous mesoporous Ni(OH) 2 hollow spheres (Ni(OH) 2 -HSs) with waxberry-like morphology were fabricated by using a facile hydrothermal method with poly(styrene-acrylic acid) spheres as the template, followed by extraction of the template. In the hydrothermal process, Ni(NO 3 ) 2 ⋅6H 2 O was employed as the precursor of Ni(OH) 2 . SEM, TEM, XPS, XRD, and N 2 adsorption-desorption isotherm techniques were used to characterize the structure and morphology of Ni(OH) 2 -HSs. The obtained Ni(OH) 2 -HSs have a uniform morphology with an average diameter of 300 nm and shell thickness of about 25 nm. The mesoporous shells of the Ni(OH) 2 -HSs are composed of amorphous Ni(OH) 2 particles. When used as an electrode, the as-prepared Ni(OH) 2 -HSs exhibit pseudocapacitive behavior with a high specific capacitance of 2559 F g −1 at a scan rate of 1 mV s −1 and a good capacitance retention of 91.8% after 1000 cycles at a current density of 5 A g −1 . These results suggest promising applications of the waxberry-like amorphous Ni(OH) 2 hollow spheres in electrode materials for supercapacitors. Graphical Caps off : Amorphous mesoporous Ni-(OH) 2 hollow spheres (Ni-(OH) 2 -HSs) with a waxberry-like morphology are fabricated through a facile hydrothermal method by using poly-(styrene-acrylic acid) spheres as a template, followed by extraction of the template. When used as an electrode, the as-prepared Ni-(OH) 2 -HSs exhibit pseudocapacitive performances with a high specific capacitance and a good capacitance retention. These results suggest promising applications of the waxberry-like amorphous Ni-(OH) 2 hollow spheres in electrode materials for supercapacitors.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2026
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IF 6.7
Hong Tian,Ziwen Zhao,Zhangjun Huang,Yanshan Yin,Song Ren,Shan Cheng
The presence of nitrogen-containing compounds (NCCs) in bio-oil severely limits its downstream utilization as a clean fuel. To address this issue, a catalytic strategy combining hierarchical pore construction and bimetallic active-site modification was developed for the deep denitrogenation and upgrading of biomass pyrolysis oil. Bamboo (BB) and wheat straw (WS) were selected as representative forestry and agricultural residues, respectively, and Ni-Co bimetal-modified HZSM-5 catalysts were prepared. Appropriate alkali treatment significantly improved the pore structure of HZSM-5, increasing its specific surface area from 383.9 to 409.12 m 2 /g, while Ni and Co introduction effectively regulated the distribution of acidic sites. As a result, the modified catalysts enhanced the pyrolysis of BB and WS and improved the quality of the resulting bio-oils. Over 6Ni0.5Co-HR5, aromatic selectivity reached 51.06% for BB and 50.66% for WS. GC/MS analysis showed that the catalyst promoted the transformation of nitrogen species from kinetically unstable chain-like compounds into more stable cyclic structures, facilitating their further removal. Among the catalysts, 6Ni0.5Co-HR5 exhibited the best denitrogenation performance, reducing the relative total nitrogen content in BB- and WS-derived bio-oils to 0.89% and 0.67%, respectively, corresponding to decreases of 96.34% and 93.02% compared with non-catalytic pyrolysis. This superior perf ormance was attributed to the synergistic effect of the hierarchical pore structure and Ni-Co bimetallic sites. The results demonstrate good feedstock adaptability of the catalyst and provide an effective route for producing low-nitrogen, aromatic-rich bio-oil.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yuanzhou Mu,Mengmeng Sun,Siyi Guo,Tingting Dong,Lizhong He
A 3D honeycomb-like Ni–Co–Mn oxide composite is grown on carbon cloth. • Multi-component synergy enhances charge storage. • The electrode delivers 349.7 mAh g −1 and retains 90% capacitance after 30,000 cycles. • An asymmetric device achieves 68.99 Wh kg −1 and 98.33% retention after 20,000 cycles. Exploring promising electrode materials with enhanced specific capacitance, cyclic stability, and capacitance retention for supercapacitor (SC) applications remains a significant challenge. Herein, a three-dimensional (3D) honeycomb-like porous ternary Ni-Co-Mn metal oxide composite electrode material was successfully grown on a carbon cloth (CC) substrate, serving as a promising multifunctional candidate for high-performance supercapacitors. In this design, NiCo and NiMn precursors were first fabricated on the surface of carbon cloth via a facile two-step hydrothermal deposition route, followed by in situ high-temperature annealing to yield a high-performance electrode material. Multiple characterization techniques indicate that the electrode material exhibits a 3D porous structure comprising NiCo 2 O 4 , Ni 6 MnO 8 , NiMnO 3 , and CoMnO 4 , collectively denoted as NC@NM-O. Leveraging the synergistic effects of multiple components and unique structural features, the NC@NM-O electrode delivers an ultra-high specific capacitance of 2517.54 F g −1 at a current density of 1 A g −1 and maintains 90.02% capacitance retention at a high discharge rate of 10 A g −1 after 30,000 cycles. An asymmetric all-solid-state supercapacitor, assembled with an activated carbon (AC) negative electrode (NC@NM-O//AC), achieves an energy density of 68.99 Wh kg −1 and a power density of 827.99 W kg −1 at a working voltage of 1.8 V. After 20,000 cycles, the device maintains an impressive capacitance retention rate of 98.33%. Overall, this work demonstrates that rationally designed, multi-component transition metal oxides can serve as advanced battery-type electrode materials for energy storage devices and provides a promising strategy for the development of next-generation high-performance supercapacitors. Download: Download high-res image (152KB) Download: Download full-size image
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