GREEN CHEMISTRY
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2014
·Vol. 16
·期 8
·3881-3889
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IF 6.852
Chenhua Shu,Tonghua Sun,Qingbin Guo,Jinping Jia,Ziyang Lou
In order to improve the desulfurization efficiency, an ionic liquid (IL) was used as the solvent for the desulfurization of diesel fuel with nickel boride. The nickel boride prepared in IL–H2O showed high specific surface area. The desulfurization efficiency of model organosulfur compounds in this work was higher than that in the previous studies. The desulfurization reactivity of model organosulfur compounds followed the order of BT (DBT) > 3-MBT > 4,6-DMDBT. Furthermore, the products of model organosulfur compounds after desulfurization were analyzed by GC/MS and their corresponding reaction routes were proposed. The effectiveness of nickel salts followed the order of NiCl2 (Ni(OAc)2) > NiSO4 > Ni(NO3)2. The desulfurization efficiency of model diesel fuels reached 90.6% under the conditions of B/S molar ratio = 9, Ni(OAc)2/S molar ratio = 3, oil/IL volume ratio = 3, water content in IL = 5%, and reaction time = 50 min. ILs maintained their original structures after regeneration. Finally, the desulfurization of real diesel fuel was carried out and a desulfurization efficiency of 88.6% was obtained in 50 min.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 23
·10502-10509
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IF 3.591
Chenhua Shu,Xunzheng Liu,Wenjing Xie,Shuiping Cai,Wenting Li,Mengjiao Wang
In order to improve the desulfurization rate, deep eutectic solvents (DESs) were used for the first time as solvents in the reductive desulfurization process with nickel boride (NB). DES plays a dual role of stabilizer and extracting agent in the desulfurization process. NBs prepared in different solvents were characterized by PSZPA, SAPA, XRD and FTIR spectroscopy. Results indicate that the NBs with small particle size and high specific surface area can be obtained by using DES as the solvent. The desulfurization rate of aromatic sulfides using DESs as the solvent is much higher than that using MeOH/THF as the solvent. The desulfurization rate in different DESs follows the order of tetrabutyl ammonium chloride (TBAC)/polyethylene glycol > TBAC/ethylene glycol > TBAC/glycerol. No chemical reactiong takes place between NB and DESs, and the structures of the DESs remain unchanged after regeneration.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2016
·Vol. 46
·期 12
·1177-1186
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IF 2.223
Guo Jie,Hou Yongjiang,Li Bo,Wang Yaquan
Abstract The Ni–B-modified carbon paste electrodes were synthesized by the electroless deposition, followed by thermal treatment. Scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were performed to gather information about the morphology, crystallinity, and binding energy. The fabricated Ni–B/C electrodes are applied to methanol electrooxidation in alkaline media. The results show that Ni–B/C catalyst with a comparable amount of microcrystalline Ni and Ni 3 B, 59 and 41 wt%, displayed a significantly enhanced electrocatalytic activity, which is approximately three times the activity of the unheated Ni–B/C catalyst. The synergetic mechanism of methanol oxidation was proposed that involves one Ni 3 B site favor the adsorption and activation of the methanol molecule and one Ni site for oxidative mediation of methanol. In addition, the kinetic parameters of the reaction were calculated using linear sweep voltammetry. Graphical abstract The illustration of the speculated methanol oxidation mechanism.
研究领域:
材料科学
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电化学
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DOI
高影响因子
ChemCatChem
·
2018
·Vol. 10
·期 20
·4555-4561
·
IF 4.674
Xiaoguang Liang,Ruoting Dong,Dapan Li,Xiuming Bu,Fangzhou Li,Lei Shu,Renjie Wei,Johnny C. Ho
Graphical A hierarchical porous electrocatalyst structure utilizing Ni(OH) 2 nanosheets directly synthesized on Ni foam as the conductive and interconnected supports is developed for the deposition of Ni−B nanoparticles by using the facile dip-coating method. This synergistic hybrid electrocatalyst system configured of Ni−B nanoparticles, Ni(OH) 2 nanosheets and Ni foam can exhibit dramatically electrocatalytic activities and superior long-term stabilities towards oxygen evolution reaction. Earth-abundant and highly-efficient electrocatalysts for oxygen evolution reaction (OER) are urgently desired to realize the large-scale storage and conversion of renewable energies. In this work, we develop a hierarchical porous electrocatalyst structure utilizing Ni(OH) 2 nanosheets directly synthesized on Ni foam as the conductive and interconnected supports. By coupling with amorphous Ni−B nanoparticles, this hybrid catalyst exhibits dramatically enhanced electrocatalytic activities and durabilities towards OER. In specific, along with the optimized Ni−B loading, this catalyst requires only an impressively small overpotential of 300 mV to drive a current density of 100 mA cm −2 for oxygen evolution in 1 M KOH electrolyte. Meanwhile, it also yields a small Tafel slope of 49 mV dec −1 and a superior long-term stability. All these results evidently indicate that the hierarchical hybridization of Ni−B with Ni(OH) 2 on Ni foam can effectively synergize the oxygen evolution, opening up a new vista for designing high-performance transition metal-based nanostructures in the field of electrochemical water splitting.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2021
·Vol. 51
·期 2
·675-684
·
IF 4.39
Huimin Wang,Huixiang Liu,Tao Feng,Lincai Wang,Wenyi Yuan,Qing Huang,Yanhui Guo
Exploiting economic, efficient and durable non-noble metal electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is promising, but still faces enormous challenges. Herein, the strategy of doping a metal boride with a rare earth metal oxide has been explored to develop a highly efficient bifunctional electrocatalyst. The novel electrocatalyst CeOx-NiB consists of CeOx-doped NiB supported on nickel foam, and was fabricated by a one-step mild electroless plating reaction. Remarkably, the CeOx-NiB@NF electrode delivers a current density of 10 mA cm−2 at overpotentials of only 19 mV and 274 mV for the HER and OER, respectively. Two-electrode electrolyzers with the CeOx-NiB@NF electrode require only 1.424 V to deliver 10 mA cm−2 for overall water splitting in 1.0 M KOH, outperforming the Pt–C/NF∥IrO2/NF electrolyzer. Meanwhile, the electrode also has good stability (can work for 100 hours at 10 mA cm−2) and industrial-grade current density. This work provides a new idea for the development of efficient and durable non-precious metal catalysts.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Bo Wang,Wen Cai,Huai Liu,Rui Zhang,Wenlong Jia,Junhua Zhang,Lincai Peng
Catalytic hydrogenation of carbohydrates over the Raney Ni catalyst is an important industrial process to produce valuable polyols. However, this process generally encounters challenges such as harsh reaction conditions, low catalytic activity, and catalyst deactivation. In this contribution, metallic nickel-rich nickel borides (NiBO-nKH2PO4) were successfully constructed via a simple chemical reduction method with potassium dihydrogen phosphate (KH2PO4) as the buffering agent and sodium borohydride (NaBH4) as the reducing reagent. Especially, the obtained NiBO-10KH2PO4 afforded quantitative sorbitol yield from the catalytic hydrogenation of glucose under mild reaction conditions within 1 h (80 °C and 1 MPa H2). Compared with the reported literature for the production of sorbitol from glucose, the developed NiBO-10KH2PO4 catalyst circumvents the use of a high hydrogen pressure and reaction temperature while delivering excellent catalytic performance and stability. Moreover, the experimental analysis demonstrated that the obtained nickel borides, with the assistance of KH2PO4, possessed abundant metallic nickel species, which favored the adsorption and activation of hydrogen molecules and thus largely promoted the hydrogenation of glucose. This work provides new insights into the rational design of practical nickel-based catalysts for the efficient catalytic hydrogenation of carbohydrates.
研究领域:
化学工程
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催化材料科学
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DOI
高影响因子
ChemSusChem
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2021
·Vol. 14
·期 24
·5499-5507
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IF 8.928
Jilong Li,Yanhui Wang,Hongwei Gao,Shiwei Song,Bowen Lu,Xueqing Tian,Shuyu Zhou,Yungang Yuan,Jianbing Zang
Graphical Put on your coat : Ni x B/B 4 C particles embedded in B-doped phenolic resin-derived carbon coating on nickel foam are prepared for efficient water/seawater electrolysis by directly soaking nickel foam in a mixture of phenolic resin and B 4 C, followed by an 800 °C annealing. The coating effectively protects the catalyst from the corrosion by seawater and facilitates the transport of electrons. Electrolysis of seawater can be a promising technology, but chloride ions in seawater can lead to adverse side reactions and the corrosion of electrodes. A new transition metal boride-based self-supported electrocatalyst was prepared for efficient seawater electrolysis by directly soaking nickel foam (NF) in a mixture of phenolic resin (PR) and boron carbide (B 4 C), followed by an 800 °C annealing. During PR carbonization process, the reaction of B 4 C and NF generated nickel boride (Ni x B) with high catalytic activity, while PR-derived carbon coating was doped with boron atoms from B 4 C (B−C PR ). The B−C PR coating fixed Ni x B/B 4 C particles in the frames and holes to improve the space utilization of NF. Meanwhile, the B−C PR coating effectively protected the catalyst from the corrosion by seawater and facilitates the transport of electrons. The optimal Ni x B/B 4 C/B−C PR /NF required 1.50 and 1.58 V to deliver 100 and 500 mA cm −2 , respectively, in alkaline natural seawater for the oxygen evolution reaction.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Xiaolin Sun,Kai Zhao,Zhiqiang Liu,Zhonghan Feng,Zihao Wang,Liang Cui,Jingquan Liu
The construction of cost-effective, efficient, and sustainable energy storage systems is extremely important for future fuels globally. Nickel borates display important characteristics in electrochemical catalytic applications, whereas few reports have focused on their energy storage properties in supercapacitors . Herein, Ni 3 (BO 3 ) 2 nanospheres (NSs) are fabricated on titanium (Ti) mesh to afford Ni 3 (BO 3 ) 2 NSs@Ti using a simple and scalable electrodeposition technique, whose electrochemical performance is carefully studied. The Ni 3 (BO 3 ) 2 NSs@Ti obtained at 1.2 V (Ni 3 (BO 3 ) 2 NSs-1.2V) exhibits a higher specific capacitance of 663 F g −1 with a current density of 0.5 A g −1 . Furthermore, by directly employing Ni 3 (BO 3 ) 2 NSs-1.2V as the positive electrode and activated carbon as the negative electrode , an asymmetric supercapacitor (ASC) device can be fabricated and displays the energy density up to 30.6 Wh kg −1 at the power density of 400 W kg −1 . Hence, the facile electrodeposited Ni 3 (BO 3 ) 2 NSs can be a potential platform for energy storage applications .
研究领域:
材料科学
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能源存储
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DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 33
·19554-19564
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IF 10.733
Hefeng Yuan,Shumin Wang,Xundi Gu,Bin Tang,Jinping Li,Xiaoguang Wang
Development of cost-effective and efficient oxygen-evolution electrocatalysts is urgently required for exploring renewable hydrogen energy and realizing large scale water splitting. In this work, self-supported FeNi@FeNiB-700 has been developed by a facile and environment-friendly solid-phase boronizing process, and it exhibits excellent catalytic activity toward the OER. It requires overpotentials of 272 mV (η10) and 399 mV (η100) to deliver oxygen-evolution current densities of 10 and 100 mA cm−2, respectively, outperforming many previously reported catalysts such as NiCo LDH nanosheets, Ni3S2/NF leaves, CoSe2 NS@CP, etc. The impressive electrocatalytic performance is attributed to the formation of loose and porous bi-metal borides on the surface of the electrode, which guarantees enhanced active surface area and rapid charge/mass transfer. Moreover, the optimum pair of porous Ni–P foam (cathode) ‖ FeNi@FeNiB-700 (anode) in a two-electrode alkaline water electrolyzer also possesses high durability and only requires a cell voltage of 1.65 V to deliver 10 mA cm−2. This study allows for large-scale application of cheap and efficient 3D bi-metal boride electrocatalysts for the oxygen evolution reaction and overall water splitting.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Xu Huang,Xuezhang Xiao,Xuancheng Wang,Zhendong Yao,Jiahuan He,Xiulin Fan,Lixin Chen
Li–Mg–B–H reactive hydride composite (RHC) has attracted extensive attention over the past decades for its extremely high hydrogen storage capacity (11.5 wt%). But the sluggish desorption kinetics for the second step dehydrogenation reaction need to be further improved. Herein, short rod-like TMTiO 3 (TM = Co, Ni) bimetallic oxides , which contain two kinds of transition metal elements, were synthesized and introduced into Li–Mg–B–H RHC for the first time. The NiTiO 3 exhibits excellent catalytic effect on the hydrogen desorption kinetic performance of Li–Mg–B–H RHC, and the incubation period for the second step dehydrogenation reaction is eliminated completely by reducing the apparent activation energy for the generation of MgB 2 from 296 kJ/mol to 269 kJ/mol. The NiTiO 3 doped Li–Mg–B–H RHC can desorb about 9.0 wt% H 2 without obvious attenuation of kinetic performance in five cycles. Mechanism analyses reveal that the in-situ generated nano-sized MgNi 3 B 2 and TiB 2 species (∼5 nm) both meet the critical value ( < 10%) of the edge-to-edge matching model (5.77% for MgNi 3 B 2 and 2.22% for TiB 2 ), which play a significant role in supporting the nucleation of MgB 2 . Meanwhile, the extremely fine MgNi 3 B 2 and TiB 2 heterogeneous nucleation sites can inhibit the excessive growth for a single crystal nucleus of MgB 2 . The heterogeneous nucleation and grain refinement mechanisms caused by the novel bimetallic oxide could provide alternative insights into designing an in-situ generated nano-sized catalytic hydrogen storage system with enhanced kinetics and cyclic stability for hydrogen-fueled applications.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Wenzheng Chen,Xuezhang Xiao,Jiahuan He,Zhong Dong,Xuancheng Wang,Man Chen,Lixin Chen
Sodium borohydride has attracted much attention because of its high hydrogen density, low hydrolysis temperature and safety. However, most of the current catalysts are expensive and their performances are easily attenuated. Therefore, the development of new catalysts with excellent performances and low cost is the key to its application. In this work, a novel dandelion-like CoMoNi–B/ZIF-67 catalyst with excellent performance was prepared by chemical reduction at room temperature, wherein the CoMoNi–B amorphous alloy was evenly wrapped on the ZIF-67 carrier through liquid phase reduction to form a dandelion-like composite catalyst, of which the “flower bud” ZIF-67 carrier is about 500 nm, and the “crown” flocculent amorphous alloy is about 400 nm. The as-synthesized CoMoNi–B/ZIF-67 has a dandelion-like structure, uniform distribution, large specific surface area, and exhibits an excellent catalytic activity with an apparent activation energy of 35.01 kJ/mol calculated by the Arrhenius equation . Its catalytic hydrolysis rate for sodium borohydride reaches up to 6277 (mL H 2 min/g Co and Ni) at 25 °C. Compared with traditional precious metal catalysts, this novel dandelion-like CoMoNi–B/ZIF-67 catalyst has simple preparation, low cost, and easy availability of raw materials, has great potential application for hydrogen generation in NaBH 4 hydrolysis.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hongwei Che,Aifeng Liu
Constructing heterostructured electrode materials with unique nanoarchitectures and tailored electronic properties is regarded as a practicable approach to boost the energy density of hybrid supercapacitors (HSCs). Herein, a novel heterostructure comprising semiconductive nitrogen-doped nickel molybdate (N–NiMoO 4 ) hollow nanostructures and metalloid nickel boride (Ni x B) nanoparticles is designed and synthesized. Theoretical simulations and experimental analyses reveal that the nitrogen doping enhances the electrical conductivity of N–NiMoO 4 . In particular, the formation of an ohmic contact interface between N–NiMoO 4 and Ni x B reduces the barrier to electron/ion transport across the interface, thereby considerably improving the electrochemical reaction kinetics. Furthermore, the surface decoration of the N–NiMoO 4 hollow nanostructures with the Ni x B nanoparticles provides additional electroactive sites and enhances the overall electrochemical performance of the N–NiMoO 4 @Ni x B heterostructures. Consequently, the constructed N–NiMoO 4 @Ni x B heterostructures exhibit enhanced specific capacities (932 C g −1 at 1 A g −1 and 709 C g −1 at 10 A g −1 , respectively) and cyclic stability (93.6 % capacity retention after 5000 cycles). Moreover, the assembled HSC device using N–NiMoO 4 @Ni x B as the positive electrode can deliver an energy density of up to 53.1 Wh kg −1 at 802 W kg −1 and maintain 95.0 % capacity after 5000 cycles. These findings provide valuable insights for optimizing interface design and heterojunction engineering in metal-boride/molybdate-based composite electrodes for advanced HSCs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）