FUEL
·
2022
·
IF 8.035
Kaige Li,Tao Li,Yuhang Dai,Yanhong Quan,Jinxian Zhao,Jun Ren
MCo 2 O 4 (M = Co, Cu, Ni or Zn) spinel catalysts have been prepared using a chemical co-precipitation method and applied in toluene combustion. The physicochemical properties of the MCo 2 O 4 catalysts was discussed to explore the impact of substitution on the tetrahedral A-site ions. The results of the activity evaluation show that the catalytic performances of Co 3 O 4 , CuCo 2 O 4 and NiCo 2 O 4 with urchin-like morphology are far superior than ZnCo 2 O 4 nanoparticles. The CuCo 2 O 4 catalyst exhibited the most superior performance for toluene combustion, and the toluene conversion rate reached 90% at 230 °C. When compared to the other catalysts, the optimal activity of CuCo 2 O 4 was attributed to the presence of more reactive oxygen species, a higher concentration of Co 3+ ions on catalyst surface and better reducibility at relative lower temperature. Moreover, the catalytic activity of the CuCo 2 O 4 catalyst did not decrease significantly in the long-term test, demonstrating its excellent stability.
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DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Pai Peng,Jie Ren,Shuxiang Wang,Jing Huang,Li Zou,Pingping Yang,Xiangui Pang,Ming Zhang,Youyi Su,Wanqi Luo,Wenyan Tao,Jiale Xie
The severe photocorrosion of cadmium sulfide (CdS) restricts its practical application for solar hydrogen production. Although remarkable progress has been achieved with an overlayer strategy for isolating the CdS surface, the lifetime of CdS-based photoanodes is still far from the actual requirements. Herein, a hybrid overlayer of defective Ni-MOF and NiO nanoparticles has been developed through the chemical bath deposition method with postannealing. This hybrid overlayer of Ni-MOF-d is coated on the surface of the TiO2/CdS type-II heterojunction. The composite photoanode exhibits a photocurrent density of 4.41 mA cm–2 at 1.23 VRHE, which is 3.47- and 1.32-fold that of CdS and TiO2/CdS, respectively. The Ni-MOF-d overlayer gives rise to a negative shift of the onset potential by 59.51 mV. After a long-term stability test of 11 h, a photocurrent retention of 70% is observed, which is among the most robust CdS-based photoanodes. The kinetics studies reveal that the performance improvements can be attributed to the multiple functions of the Ni-MOF-d hybrid overlayer, including isolating the CdS surface from the electrolyte, cocatalyzing the electrode oxidation processes, passivating the surface defect states of CdS, and facilitating the charge injection from the photoanode to the electrolyte.
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yi-Hui You,Chang-Dong Gu,Xiu-Li Wang,Jiang-Ping Tu
Electrodeposition process of Ni–polytetrafluoroethylene (PTFE) composite coatings is limited to use aqueous plating bath where nonionic/cationic wetting agents usually are necessary to prohibit the hydrophobic PTFE particles being coagulated. This study proposes a novel electrolyte for the depositing Ni–PTFE composite coatings which is formed in a deep eutectic solvent (DES). The DES with a non-aqueous nature allows the PTFE particles well be dispersed in the electrolyte without the additive of any wetting agents. The Ni–PTFE composite coatings are successfully electrodeposited from the proposed DES-based plating bath which is confirmed by the scanning electron microscope and X-ray energy dispersive spectroscope. Deposition mechanism, microstructure, and properties of the composite coatings are investigated. Importantly, it is found that the Ni–3.1wt.% PTFE composite coating shows a hydrophobic behavior with a contact angle of about 121±1° and an enhanced wear resistance than the pure Ni coating due to the incorporation of PTFE.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Lingjie Li,Wenjun Huang,Jinglei Lei,Bo Shang,Nianbing Li,Fusheng Pan
The electrocatalyst with low cost and excellent catalytic performance for oxygen evolution reaction (OER) is indispensable in large-scale water electrolysis for hydrogen generation . Herein, we report an inexpensive and highly efficient OER catalyst, amorphous Ni-Fe-P holey nanospheres , which were in situ grown on 3D porous Ni foam by one-step electrodeposition . The as-prepared Ni-Fe-P/NF shows attractive catalytic performance in alkaline medium with a low overpotential of 156 mV at a 10 mA cm −2 current density, a Tafel slope of 69 mV dec −1 , and the long-term (>36 h) durability, which is superior to other well-performed metal-phosphide catalysts reported and the commercial catalyst IrO 2 . Such remarkable OER catalytic performance can be attributed to the synergism of Ni and Fe elements, the amorphous holey structure, the surface superaerophobicity and self-supportive configuration of the as-prepared Ni Fe bimetal phosphide.
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DOI
高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 15
·8301-8312
·
IF 3.917
Li Xiangping,Liu Juping,Zhang Jianguang,Liu Bin,Ma Wenchao,Wang Chuanbin,Chen Guanyi
Lignocellulosic biomass-derived bio-oil is considered as a promising renewable biofuel. In this paper, incipient wetness impregnation method, ammonia grafting method and direct synthesis method were employed as nickel loading methods for the preparation of Ni/Al-SBA-15 catalysts. The effects of these nickel loading approaches on the structure and hydrodeoxygenation performance of Ni/Al-SBA-15 were studied. The structure of Ni/Al-SBA-15 was significantly influenced by the nickel loading methods, including the specific surface area, the pore volume, the wall thickness and so on. Nickel loading methods also affected the actual nickel content of nickel-based catalysts. Unsuccessful loading of nickel species was observed during the preparation of Ni/Al-SBA-15 using direct synthesis method. The conversion of eugenol and selectivity of products after hydrodeoxygenation in n -dodecane over Ni/Al-SBA-15 catalysts were investigated. Results showed that the conversion of eugenol nearly reached 100% for all the reaction, but the composition of product was significantly different when using different Ni/Al-SBA-15 as hydrodeoxygenation catalyst. The reaction pathway of eugenol hydrodeoxygenation in n -dodecane was also speculated in this paper. Graphic Effects of nickel loading approaches on the structure and hydrodeoxygenation performance of Ni/Al-SBA-15 were investigated. For the liquid phase hydrodeoxygenation of eugenol to hydrocarbon, catalysts prepared by ammonia grafting method exhibited the highest catalytic activity.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Qihong Xue,Zhikui Jiang,Chao Wang,Xian Kan,Jiaming Wang,Jiangang Chen
13-Ni/ZrO2, 13-Ni3P/ZrO2, 13-Ni/SiO2, and 13-Ni3P/SiO2 catalysts were used in the hydrogenation of diethyl oxalate (DEO) to ethyl glycolate (Egly) to investigate the modulating effect of phosphorus. XRD, TEM and FT-IR results show that phosphorus act as a divider of Ni metallic particle and shows a segregation effect. The presence of P transformed the linkage of surface metals from the original -Ni-Ni-Ni-Ni- to the P-Ni-P-Ni-P state, and FT-IR shows that the former adsorbed CO in a combination of linear and bridging adsorption mode, whereas the latter predominantly in CO linear adsorption. Bridging adsorption is via dual sites and makes the preliminary hydrogenation products less likely to detach from the catalyst surface thus facilitating deep hydrogenation, while linear adsorption facilitates partial hydrogenation by a rapid detachment of intermediate product like Egly. The various loading Ni3P/SiO2 catalysts show incomplete phosphorylation with increasing nickel loading, giving rise to a state of coexistence of Ni and Ni3P crystalline phases. This may lead to a coexistence of surface -Ni-Ni-Ni-Ni- and P-Ni-P-Ni-P and the corresponding assort of adsorption, e.g. bridging/linear ones, making deep hydrogenation occur partially besides stepwise hydrogenation.
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Zhou Xiaozheng,Chen Anqi,Lu Chengwei,Ma Ruojian,Fang Ruyi,Gan Yongping,Wang Guoguang,Xu Jianping,Mao Qinzhong,Lu Xiaoxiao,Xia Xinhui,Xia Yang
LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathode material is prized in the electric vehicles (EVs) industry for its high capacity and voltage during operation. However, the high residual alkali content and inferior ionic conductivity of Ni‑rich cathode materials are the intractable obstacles to the large-scale commercial application for a long time. Herein, a feasible Nb 2 O 5 coating strategy is proposed to eliminate residual alkali along with constructing high Li + conductive coating layer on NCM811 cathode materials surface. Impressively, 0.3% Nb 2 O 5 ‑coated NCM811 cathode exhibits superior rate capability (146.4 mA h g −1 @400 mA g −1 ) and remarkable rate cyclic stability (188.5 mA h g −1 after 100 cycles with capacity retention of 94.8%). On the one hand, a small quantity of Nb 2 O 5 coating on NCM811 surface can react with surface residual alkali to promote the transformation of low electronic conductivity surface residual alkali into the Li + conductor of LiNbO 3 coating layer, enhancing Li + de-intercalation kinetics and rate performance. On the other hand, excessive Nb 2 O 5 coating may introduce Nb 5+ into the lattice of NCM811, acting as pivotal components within the Li + layer, which effectively suppresses the H2 ↔ H3 phase transition, contributing to long-term cyclic stability. This work paves a new path for the rational design and facile coating of Ni-rich oxide cathode materials with reinforced structure stability and boosted rate capability in high‑energy‑density lithium-ion batteries.
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高影响因子
Reaction Chemistry & Engineering
·
2025
·
IF 3.1
Weidong Liu,Jianguo Liu
Reusable catalysts based on non-noble metals with broad applicability for nitrile catalytic hydrogenation are key to achieving more sustainable primary amine production. Herein, a simple and efficient carbon-coated non-noble nickel-based catalyst (Ni/NiO@C-600-200-1-H₂O) was developed for the hydrogenation of aromatic substituted nitriles to aromatic substituted amines under relatively mild conditions (120 °C, 10 bar H₂, 4 h). The carbon-coated structure endows the catalyst with excellent anti-agglomeration properties, significantly enhancing its cyclic stability. The catalyst exhibits high tolerance toward various functional groups, including halogen, methyl, and methoxy, achieving remarkable conversion rates (over 99%) and product selectivity (up to 98.25%). Additionally, the catalyst's magnetic properties facilitate easy recovery and reuse. When applied to a continuous flow reactor for benzonitrile hydrogenation under optimized conditions, the catalyst demonstrated a conversion rate and selectivity exceeding 99%, with continuous operation lasting up to 31 h.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xia Wei,Yuhan Zhou,Tianyao Wang,Hongbin Dai,Song Li
The hydrazine oxidation reaction (HzOR) is essential for direct hydrazine fuel cells and offers a promising alternative to the kinetically sluggish oxygen evolution reaction in water splitting. In this work, we present the design and synthesis of a novel Ni-Zn-Cu catalyst with a three-dimensional (3D) interconnected hollow network structure for HzOR. This unique 3D hollow architecture, comprising Ni-Zn-Cu nanosheets, significantly enhances HzOR catalytic performance by increasing the number of accessible active sites and improving both mass and charge transport. Additionally, the incorporation of multifold nanotwins within the catalyst induces lattice strain and reduces coordination numbers, optimizing the electronic structure and d -band center to strengthen hydrazine adsorption and catalyst reactivity. The Ni-Zn-Cu catalyst exhibits remarkable HzOR performance, achieving a current density of 200 mA·cm −2 , and a mass activity of 10,129 A·g −1 at −0.05 V vs. RHE, and a low onset potential of −0.15 V vs. RHE. Furthermore, it retains 96 % of its initial activity after 20 h of continuous electrolysis. This work marks a significant advancement in the development of highly efficient and durable HzOR catalyst.
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高影响因子
BIOSENSORS & BIOELECTRONICS
·
2025
·
IF 10.5
Xue Fan,Lujie Wang,Hongxin Wang,Liuyi Huang,Jiahui Lin,Xia Gao,Fengna Xi
An immunosensing platform was developed based on the enhanced electrochemiluminescence (ECL) of luminol-dissolved oxygen (O 2 ) by nanochannel-confined Ni(OH) 2 -CeO 2 composite nanozyme, which is able to sensitively detect cytokine. The mesoporous silica nanochannel array film (SNF), decorated on a cost-effective ITO electrode, features ultrasmall (2∼3 nm) nanochannels, enabling the confinement of in situ synthesized Ni(OH) 2 -CeO 2 composite nanozyme via a continuous electrodeposition process. Ni(OH) 2 -CeO 2 exhibits dual peroxidase (POD) and oxidase (OXD) enzyme-like activities, serving as an efficient oxygen reduction reaction (ORR) catalyst to produce reactive oxygen species (ROS) and catalyze luminol oxidation. Compared to nanozymes synthesized on flat electrodes, nanochannel-confined nanozyme demonstrates superior ECL enhancement. The combination of Ni(OH) 2 and CeO 2 exhibits strong synergistic catalytic performance, boosting ECL of luminol-O 2 under neutral conditions by 33.7 orders compared to electrode without confined nanozyme. Using tumor necrosis factor-alpha (TNF-α) as a proof-of-concept demonstration, immunosensor is fabricated by immobilization recognition antibodies on the SNF outer surface. TNF-α binding induces immunocomplex formation, reducing ECL signal by increasing interfacial resistance and hindering luminol diffuse. This enables sensitive TNF-α detection over a wide linear range (10 fg/mL to 10 ng/mL) with an ultralow detection limit of 8 fg/mL. The immunosensor demonstrates good selectivity, stability, and reproducibility.
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产品关联
DOI
PubMed
高影响因子
Materials Today Energy
·
2024
·
IF 9
Hang Lou,Nan Li,Ruxia Zhang,Yanhui Chen,Chao Xie,Hao Jiang,Yahui Yang,Wenjun Zhang
Efficient Ni-based catalysts for small organic molecule electrooxidation are crucial yet challenging to develop. This study presents self-supported nickel-nickel Hofmann-type coordination polymer nanoplate arrays (Ni-HCP- t /NF) synthesized through an electrochemical semi-sacrificial growth strategy. By controlling the growth time of Ni-HCP- t nanoplates, we optimized the structure and electrochemical performance, with Ni-HCP-40/NF exhibiting significant bifunctional electrocatalytic activity for urea and methanol oxidation reactions (UOR and MOR), achieving a current density of 100 mA cm −2 at only 1.44 and 1.46 V (vs. RHE), respectively. Moreover, urea-water and methanol-water electrolysis systems using Ni-HCP-40/NF as the anode demonstrate reduced voltages of 1.61 and 1.64 V for urea-water and methanol-water electrolysis at 100 mA cm −2 , respectively, dramatically lower than water electrolysis (1.85 V). The superior UOR/MOR activities are attributed to the abundant and fully exposed Ni sites and efficient electron/mass transfer rate facilitated by three-dimensional nanoplate architecture.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Kuangfu Huang,Ruohao Dong,Chao Wang,Wen Li,Hongxia Sun,Baoyou Geng
Design and synthesis of highly efficient, stable, and low-cost catalysts have a crucial role in the study of electrolytic water. In this work, a novel Fe–Ni layered double hydroxide (LDH) material with homogeneous heterostructures is successfully synthesized by a two-step hydrothermal method. Compared with the ordinary Fe–Ni LDH arrays prepared by one step, this structure has a rougher surface, so it has a more extensive active area, thus providing more active sites. Due to the synergistic effect of different elements and more exposure of active sites, the catalytic effect of this material for water splitting is outstanding. The post-optimized FeNi@FeNi electrode exhibits extraordinary OER (oxygen evolution reaction) and HER (hydrogen evolution reaction) performance with OER overpotentials of 193, 231, and 306 mV and HER overpotentials of 127, 173, and 253 mV when the current density is 10, 20, and 50 mA·cm–2, respectively. The improved electrolytic water performance reveals that the design of homogeneous heterostructures is maybe an alternative route to exploit high-efficiency catalysts and promote the application of nonprecious metal catalytic materials.
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DOI
高影响因子
危险品化学品经营许可证（带存储）