Micromachines
·
2023
·Vol. 14
·期 4
·870
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IF 3.4
Huan Wang,Mingxuan Dong,Baorui Shao,Yaodan Chi,Chao Wang,Sa Lv,Ran Duan,Boqi Wu,Xiaotian Yang
N-TiO2/Ni(OH)2nanofiber was successfully prepared by combining the electrospinning and solvothermal method. It has been found that under visible light irradiation, the as-obtained nanofiber exhibits excellent activity for the photodegradation of rhodamine B, and the average degradation rate reaches 3.1%/min−1. Further insight investigations reveal that such a high activity was mainly due to the heterostructure-induced increase in the charge transfer rate and separation efficiency.
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高影响因子
FUEL PROCESSING TECHNOLOGY
·
2021
·
IF 7.033
Antony Rajendran,Tian-You Cui,Hong-Xia Fan,Meng-Yu Wang,Wen-Ying Li
A straightforward hydrothermal synthesis of NiMoS active phases loaded on SBA-15 was attempted. We initially prepared a catalyst by impregnating metal precursors sequentially onto SBA-15 and the subsequent hydrothermal treatment with sublimed sulfur. To obtain the one-pot catalyst, we performed the hydrothermal treatment of a mechanical mixture containing metal precursors, sublimed sulfur, and SBA-15. The catalysts were characterized by powder X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, N 2 adsorption-desorption study, and high-resolution transmission emission spectroscopy . Compared to impregnation-assisted synthesis, the one-pot synthesis promoted the generation of dispersed shorter MoS 2 slabs with desirable average stacking number, i.e., increased number of edge and rim sites. Therefore, the one-pot catalyst enabled the ultra-deep sulfur removal (~100%) in the dibenzothiophene hydrodesulfurization . Unlike Ni(acac) 2 , the utilization of Ni(NO 3 ) 2 inhibits the sulfidation of molybdenum and the dispersion of MoS 2 layers, decreasing the hydrodesulfurization activity. The one-pot catalyst was able to achieve ~80% sulfur removal even after six consecutive catalytic runs under batch reactor conditions (320 °C, 6 MPa (H 2 ), 500 ppmw S, 100 mg (m cat )) due to the persistent stability of NiMoS active phases.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Mengfang Jiang,Xuefeng Zhang,Xiao Du,Xiaowei An,Fengfeng Gao,Xiaogang Hao,Guoqing Guan,Zhong Liu,Jun Li,Abuliti Abudula
An electrochemically induced electrode with bromide ion (Br - ) dual adsorption sites was obtained by in-situ growing of Ni-MOF derivative/NiCo layered double hydroxide (Ni-MOF(D)/NiCo LDH) composite film on the stainless-steel wire mesh via an electrodeposition-assisted solvothermal method, which exhibited excellent Br - selectivity from ionic mixture solutions of Br - , NO 3 – and I - in an electrochemically switched ion exchange (ESIX) system. The Br - extraction capacity was as high as 126.30 mg·g −1 and the separation factors of Br - /NO 3 – and Br - /I - were 8.29 and 4.83 respectively. Combining the simulation and experimental results, it was confirmed that the highly efficient selective extraction of Br - in neutral solution should be derived from the dual-site (i.e., electrochemically induced laminate metal coordination sites and interlayer anion exchange sites of NiCo LDH) adsorption. Furthermore, the electrode demonstrated superior adsorption–desorption performance and electrochemical stability because of the in-situ growth strategy, which enhanced the binding force between NiCo LDH and substrate and improved the electrical conductivity of NiCo LDH, and provided a storage space for Br - . This study served deep understanding of ions selective extraction mechanism of LDH-based materials in the ESIX process, which could be a novel reaction concept for the design of those electrodes with specific recognition sites in the applications of them in other fields such as supercapacitors, sensors and batteries.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Ying Lu,Fujian Yang,Siyuan Chen,Wenchao Shi,Chengdu Qi,Guilong Peng
In this work, Ni(II) was used as peroxymonosulfate (PMS) activator for decomplexation of Ni(II)-citrate, and subsequently applied for the decomplexation of chelated nickel in the electroless nickel plating wastewater. Effect of the co-existed substances (HCO 3 − , HPO 3 2− , H 2 PO 2 − , and P 2 O 7 4− ) on the decomplexation of Ni(II)-citrate were evaluated. Interestingly, except for H 2 PO 2 − , the presence of HCO 3 − , HPO 3 2− , and P 2 O 7 4− enhanced the decomplexation efficiency of Ni(II)-citrate via promoting the decomposition of PMS. Based on the radical quenching experiments and electron spinning resonance (ESR) spectra analysis, OH, SO 4 ‐ , and 1 O 2 were the primary reactive species involved in the decomplexation reaction process. Furthermore, after the decomplexation of the electroless nickel plating wastewater by PMS, the recovery of nickel was successfully achieved via adsorption coupled with electrodeposition , and 93.1% nickel recovery could be accomplished with initial Ni(II) eluent concentration of 32.5 g/L. Therefore, this study provides a green and promising approach for the application of advanced oxidation processes based on PMS activation, and has the potential to convert recoverable resources into value-added products from electroplating wastewater.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Lei Tan,Jiangtao Yu,Haiyan Wang,Hongtao Gao,Xien Liu,Lei Wang,Xilin She,Tianrong Zhan
NiSe 2 /Ni 3 Se 4 dual-phase electrocatalysts are synthesized by calcining the Ni(OH) 2 nanosheets on Ni foam and Se powder under an N 2 atmosphere. The Ni’s charge-state, phase compositions, and electrocatalytic performances are dependent on the initial mass ratios of Ni to Se. The experimental results demonstrate that the electrocatalyst with a higher Ni charge-state and more Ni 3 Se 4 phase facilitates oxygen evolution reaction (OER), whereas the one with a lower Ni charge-state and more NiSe 2 phase boosts hydrogen evolution reaction (HER). Density functional theory calculations reveal that the interfacial electrons transfer from Ni 3 Se 4 to NiSe 2 , which improves conductivity and optimizes adsorption/desorption energies. NiSe 2 /Ni 3 Se 4 /NF-4 containing more NiSe 2 phase displays the best HER activity while NiSe 2 /Ni 3 Se 4 /NF-1 containing more Ni 3 Se 4 phase shows the best HER activity. The electrolyzer, employing NiSe 2 /Ni 3 Se 4 /NF-4 and NiSe 2 /Ni 3 Se 4 /NF-1 as the cathode and anode, respectively, performs the full potential and demonstrates a low voltage of 1.56 V achieving 10 mA cm −2 with good durability.
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CATALYSIS LETTERS
·
2021
·Vol. 153
·期 6
·1666-1675
·
IF 3.186
Wang Yuan,Liu Shanshan,Zhang Yidong,Guo Qirui
Hydrogenation of biomass-derived furfuryl alcohol to widely used tetrahydrofurfuryl alcohol is an important industrial route, which however calls for a more efficient catalyst. In this work, a highly selective and stable Ni-C-Al 2 O 3 catalyst for furfuryl alcohol hydrogenation to tetrahydrofurfuryl alcohol is reported. The catalyst precursor is prepared by in-situ growth of Ni-based metal organic frameworks (Ni-BTC) on Al 2 O 3 and then the precursor undergoes thermal decomposition to obtain the catalyst directly. For comparison, Ni-C/Al 2 O 3 acquired from pyrolysis of physically mixed Ni-MOFs with Al 2 O 3 and Ni/Al 2 O 3 prepared by impregnation method are also tested as the hydrogenation catalysts. The prepared catalysts are characterized by a series of techniques, including XRD, FT-IR, TG, TEM, SEM, XPS and BET to reveal the relationship between the catalysts structure and their performance. The results show that small metal Ni particle size and appropriate interaction between Ni and the support, which benefit from the in-situ preparation method are key factors that ensure the high furfuryl alcohol conversion (99.8%) and high selectivity to tetrahydrofurfuryl alcohol (98.2%) at moderate reaction conditions (120 °C, 30 min, 4 MPa H 2 ). Graphical Abstract
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高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Ke Qian,Xiaodong Liang,Qin Liu,Jingying Li,Yi Gan,Jia Yao,Junjie Zheng,Ziang Wu,Yin Yang,Xingtai Liu,Xiang Liu,Lin Lv,Hanbin Wang,Jun Zhang,Houzhao Wan,Hao Wang
Alkaline zinc-based batteries have become a current research hotspot due to their high energy density and safety, but their low cycle stability and rate performance limit their commercial applications. Herein, vertically ordered NiCo 2 S x nanoneedle arrays are prepared using different sulfidation concentrations based on the anion exchange reaction. The highly uniform nanoneedle arrays provide fast ion transport paths and abundant active sites, and the prepared NiCo 2 S x @Ni foam (NiCo 2 S x @NF) electrode has the excellent capacity (121.9 mAh g −1 ), stable cycle performance (91.1 % of capacity retention after 500 cycles), also achieves a maximum energy density of 636.3 Wh kg −1 and a maximum power density of 40.9 kW kg −1 . This paper provides a more precise and accurate idea for preparing cathode materials for durable alkaline Ni–Zn batteries .
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Shanshan Duan,Xun Wang,Ruipeng Ren,Yongkang Lv
One of the most effective methods of utilizing CH 4 and CO 2 resources is the dry reforming of methane (DRM). However, the small particle size and the metal-support interactions of Ni–W bimetallic catalysts are key factors affecting activity and carbon deposition . This article evaluates the effect of Ni–W bimetallic catalysts synthesized by different preparation methods on their catalytic performance in DRM reactions. The results show that the bimetallic catalyst prepared by the solid-state grinding method exhibits excellent catalytic performance and anti-carbon deposition performance. The conversion rate of CH 4 and CO 2 remain unchanged during 1450 min, which is 58% and 66%, respectively. Through various characterization methods, it has been proven that the bimetallic catalyst prepared by the solid-state grinding method effectively reduces the size of Ni particles and increases the number of exposed active sites. In addition, this method also enhances the metal-support interactions, which helps to improve the stability of the catalyst.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Rui Qi,Lian Liu,Xinwang Liang,Shan Zhang,Boxia Liu,Chuhan Xing,Zhi Song
The NB-10/PMS system degrades NOR with a degradation efficiency of over 96%. • •O 2 - and 1 O 2 dominate; non-radical pathway plays key role. • SO 4 •− and •OH play a supporting role, assisting in the degradation of NOR • Anti-interference to coexisting ions, efficient in natural water. To address the issues of efficient removal of antibiotic pollutants and the limited activation efficiency of peroxomonosulphate (PMS), this study developed a Ni metal cluster-modified bismuth bromide (Ni/BiOBr) composite catalyst and utilised it to activate PMS for the degradation of norfloxacin (NOR) in water. By regulating the interfacial interactions between the Ni metal clusters and BiOBr, interfacial electron transfer was promoted and the PMS activation efficiency was enhanced. The results indicate that the Ni/BiOBr-PMS system exhibits excellent NOR removal performance, with a NOR degradation rate of up to 96.7% within 60 min. Material characterisation results show that the introduction of Ni clusters provides abundant reactive sites and improves the interfacial electron transfer properties of the composite material. Radical quenching experiments and electron paramagnetic resonance (EPR) analysis indicated that various reactive oxygen species, including SO 4 •- , •OH and 1 O 2 , are generated within the system and collectively participate in the oxidative degradation of NOR. Electrochemical testing further confirmed that Ni/BiOBr possesses good electron transfer capability, which is conducive to the sustained activation of PMS. Furthermore, this catalytic system demonstrates good adaptability under different reaction conditions and in the presence of various co-existing anions, whilst exhibiting good cycling stability. The results indicate that regulating the electron transfer process via the Ni metal cluster/BiOBr interface can effectively enhance PMS activation, providing new insights into the design of metal cluster-based PMS catalytic materials and the treatment of antibiotic-contaminated water. Download: Download high-res image (226KB) Download: Download full-size image
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JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Tingmin Lai,Ao Sheng,Zifang Zhang,Wei Li,Jianwen Yang,Shengkui Zhong,Yanwei Li,Yi Pei,Bin Huang
Monocrystalline layered cathode is of particular interest owing to the satisfactory mechanical integrity against long-term cycling. However, the high-temperature calcination , which is perceived as the indispensable reaction condition, favors the formation of Ni 2+ that triggers the Li + /Ni 2+ disorder and the formation of electrochemically inactive NiO. Herein, we develop a SrO-assistant method to synthesize a monocrystalline ultrahigh-Ni LiNi 0.95 Co 0.04 Mn 0.01 O 2 under a moderate calcination temperature. The addition of an appropriate amount of SrO (0.3 wt%, SCN95–Sr-3) facilitates the formation of monocrystalline LiNi 0.95 Co 0.04 Mn 0.01 O 2 (grain size: 2–4 μm) under 790 °C. The obtained LiNi 0.95 Co 0.04 Mn 0.01 O 2 represents excellent electrochemical properties with an initial discharge capacity of 240.5 mAh g −1 and a Coulombic efficiency of 90.1 % at 0.1C (1C = 220 mA g −1 ) in a Li-metal half cell. Upon long-term cycling, the monocrystalline feature with less crystallographic defect effectively enhances the structural stability and inhibits the formation of intergranular cracks, resulting in an enhanced cyclic stability (discharge capacity of 151.0 mAh g −1 maintained after 300 cycles at 1C in a Li-metal half cell). Coupled with a graphite anode, the LiNi 0.95 Co 0.04 Mn 0.01 O 2 || graphite full cell represents a stable cycling at 1C, with a capacity retention of 99.0 % after 100 cycles.
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高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2023
·
IF 4
Lu Danli,He Zhiping,Liu Weiliang
In this work, a novel NiCo/ZIF-67/rGO catalyst was prepared via a facile impregnation-reduction method, followed by comprehensive characterization using XRD, SEM, TEM, XPS, and ICP-OES techniques. This catalyst featured a hierarchical porous support consisting of Zeolitic Imidazolate Framework-67 (ZIF-67) with a high specific surface area and reduced graphene oxide (rGO) with considerable electronic conductivity, along with strong synergistic interactions between Ni and Co species as well as between the deposited metals and the carbon in rGO. The NiCo/ZIF-67/rGO catalyst exhibited excellent activity in catalyzing the hydrolysis of NaBH 4 , resulting in a low activation energy ( E a ) of 21.08 kJ mol −1 and a high turnover frequency (TOF) value of 5420 \(mL_{{\textit{H}}_\text{2}}g_\textit{M}^{-1}\min^{-1}\) . The hydrogen generation rate was increased by nearly double after five cyclic experiments, demonstrating the exceptional catalytic durability of NiCo/ZIF-67/rGO. The as-prepared NiCo/ZIF-67/rGO catalyst exhibits the advantages of cost-effectiveness, durability, and superior performance for NaBH 4 hydrolysis, rendering it a promising candidate for industrial applications.
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Sustainable Energy & Fuels
·
2023
·Vol. 8
·期 1
·150-158
·
IF 5.6
Qiulin Ye,Yaqi Peng,Dongdong Wang,Jiabao Lv,Yaoyue Yang,Yue Liu,Zhifu Qi,Songqiang Zhu,Chunliang Ge,Yan Yang,Angjian Wu,Shengyong Lu
Electrocatalytic CO2 conversion promises a sustainable alternative to producing CO2-based green chemicals and fuels concomitant with the storage of fluctuating renewable energy. Herein, isolated Ni single-atom catalysts supported by nitrogen-doped hierarchical porous carbon (Ni-SACs/NHPC) were designed with large specific surface area (1115.6 m2 g−1) and abundant micropore structures. The synthesized Ni-SACs/NHPC demonstrated excellent activity (CO faradaic efficiency, FECO > 90%) for CO2 electrocatalytic reduction with a broad reaction potential window from −0.74 to −1.24 V vs. reversible hydrogen electrode (RHE), while flow cell design increased the current density while maintaining high CO faradaic efficiency. Additionally, non-thermal Ar-plasma was used to enhance the adhesion at the electrocatalyst–substrate interface, resulting in a significantly high CO partial current density (16.8 mA cm−2) achieved at −1.04 V vs. RHE with CO faradaic efficiency of ∼96%. Density functional theory (DFT) calculations revealed the highly dispersed single-atom Ni could effectively weaken the Ni–C bond energy and avoid the excessive accumulation of *CO to promote electrocatalytic CO2-to-CO conversion.
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