INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Xianglei Cao,Liugen Zhang,Changyan Guo,Tingxiang Chen,Chao Feng,Zechang Liu,Ying Qi,Wei Wang,Jide Wang
In this paper, Ni x Cd y S composite photocatalysts were synthesized by using Ni-doped Cd–Co PBA as the precursor, which retains the advantages of PBA such as porous structure , large specific surface and highly dispersed metal active sites. The photocatalytic hydrogen production performance over Ni x Cd y S is three times higher than that of pure CdS with H 2 yield of 8.45 mmol g −1 h −1 . The catalyst was analyzed by the UV/Vis absorption spectra , photoluminescence spectra, time-resolved photoluminescence spectra, transient photocurrent responses, electrochemical impedance spectra, Mott-Schottky test, etc. A series of characterization results prove that the electron-hole recombination rate, electrochemical resistance and band gap of nickel-doped CdS composites are obviously smaller than CdS, which are important factors to improve the photocatalytic hydrogen production performance. This work may provide some reference value for the fabrication of other functional materials using PBA as precursors.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2021
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IF 5.302
Yuqian Wang,Qiuyu Cheng,Peng Jiang,Lin Liu,Kunyang Cui,Yong Li
Solid solutions based on BaAl 12- x M x O 19 (M = Co 2+ , Ni 2+ ) showing intense blue shades were successfully synthesized by conventional solid state reaction. Then, novel zirconia ceramic materials with intense blue hues were then prepared upon addition of 5 wt% of the synthesized chromophore to a ZrO 2 white matrix containing 5 wt% Y 2 O 3 and sintered at 1400 °C for 6 h. The colors of the BaAl 12- x Co x O 19 or BaAl 12- x Ni x O 19 are due to the d-d transitions of Co 2+ or Ni 2+ in tetrahedral coordination, respectively. The colored zirconia ceramics were all indexed with tetragonal phase. The coexistence of the chromophore and ZrO 2 were observed by scanning electron microscopy and energy dispersive spectrometer. The hardness of the as-synthesized blue zirconia ceramic was slightly higher as compared to the pure undoped sample.
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Journal of Materials Chemistry A
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2021
·Vol. 10
·期 11
·6007-6015
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IF 12.732
Min Li,Minmin Wang,Dongyuan Liu,Yuan Pan,Shoujie Liu,Kaian Sun,Yanju Chen,Houyu Zhu,Wenyue Guo,Yanpeng Li,Zhiming Cui,Bin Liu,Yunqi Liu,Chenguang Liu
Single-atom catalysts (SACs) regulated by heteroatoms have displayed great potential as electrocatalysts for highly efficient hydrogen evolution reaction (HER); however, the controllable synthesis of an axial coordination structure of SACs to achieve robust HER performance remains a great challenge. Herein, we have proposed a doping-adsorption-pyrolysis strategy to construct NiN4–Cl active sites with axial Cl coordination for accelerating electrocatalytic HER. The obtained NiN4–Cl SAs/NC catalyst exhibits superior HER activity with low over-potential, small Tafel slope, high turnover frequency, and long-term stability. Density functional theory calculation reveals that the excellent HER performance of NiN4–Cl SAs/NC originates from the axial Cl-coordination-induced electronic localization enhancement, which is beneficial for the adsorption and activation of H* intermediate, thus accelerating the HER process. This work opens a new opportunity for rational design and construction of high-performance SAC catalysts by axial coordination strategy for electrocatalytic application.
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ACS Sustainable Chemistry & Engineering
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2021
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IF 8.198
Mengting Zhu,Jiamin Shi,Xing Xin,Jinghua Wu,Xiayin Yao
All-solid-state lithium (Li) batteries have been emerging as attractive technologies for energy storage systems due to their benefits in safety. However, the electrochemical performance of all-solid-state Li batteries is limited by the interfacial problems resulting from the solid–solid contact between electrolytes and electrodes. Here, a binary transition-metal sulfide NixCo3–xS4 with a special hexagonal layered structure is synthesized and introduced into all-solid-state Li batteries based on sulfide electrolytes. By freely adjusting the Ni/Co ratio, components with optimal performance can be easily obtained. In addition, the well-designed interfacial structure is favorable for ion transport and interfacial stability because the sulfide electrolyte particles can rivet on the hexagonal platelets which can maximally reduce the contact resistance between the solid electrolytes and cathodes. As a result, the all-solid-state Li battery employing the Ni0.3Co2.7S4@Li7P3S11 composite cathode exhibits enhanced rate capability and cycling stability. At a current density of 0.1 A g–1, it delivers a specific capacity as high as 1216 mA h g–1. Even under a large current of 1 A g–1, a large capacity of 510 mA h g–1 can be retained after 100 cycles.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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IF 19.503
Ping Li,Ran Chen,Shien Zhao,Wenqin Li,Yunan Lin,Yu Yu
Exploring cost-effective yet high-performance catalysts for dehydrogenation of ammonia borane (AB) is highly desirable for hydrogen economy. Transition metal nitrides (TMNs) have received huge attention in various energy storage/conversion systems, yet utilization for AB dehydrogenation is rarely studied. Herein we propose a green approach to Co doped Ni nitride nanoparticles anchored on reduced graphene oxide nanosheets (rGO/CoNi-N) from a bimetal-organic complex. The resultant rGO/CoNi-N presents outstanding catalytic AB dehydrogenation performance with a turnover frequency (TOF) value of 126.0 min −1 and an activation energy (Ea) of 32.8 kJ mol −1 , rivalling state-of-the-art catalysts. Based on experimental and theoretical investigations, remarkable performance of rGO/CoNi-N can be attributed to full exposure of active sites and favorable mass transfer. Significantly, Co species incorporation in Ni-N can modulate electronic state with upshift of the d-band center, leading to promoted H 2 O adsorption and reduced energy barrier of the rate-determining step (H 2 O dissociation), thereby substantially boosting AB hydrolysis.
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Small
·
2021
·Vol. 17
·期 33
·2102097
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IF 13.281
Chunqiao Jin,Pengbo Zhai,Yi Wei,Qian Chen,Xingguo Wang,Weiwei Yang,Jing Xiao,Qianqian He,Qingyun Liu,Yongji Gong
Ultrathin nickel (Ni)-based sulfide nanosheets have been reported as excellent electrocatalysts for overall water splitting; however, the uncontrollability over thickness due to the nonlayered structure still hampers its practical application. Herein, a simple topochemical conversion strategy is employed to synthesize cobalt-doped Ni 3 S 2 (Co-Ni 3 S 2 ) ultrathin nanosheets on Ni foam. The Co-Ni 3 S 2 nanosheets are controlled synthesized by using Co-Ni(OH) 2 ultrathin nanosheets as templates with anneal and sulfurization treatment, showing exceptional electrocatalytic activity. This template-assisted method can also be applied to obtain Ni, NiO, and NiP x nanosheets, providing a universal strategy to synthesize ultrathin nanosheets of nonlayered materials. The overall water splitting of this Co-Ni 3 S 2 ultrathin nanosheets achieves a low voltage of 1.54 V at a current density of 10 mA cm −2 and high durability in 1 m KOH, comparable to the best performance of electrochemical water splitting ever reported. The detailed structural transformation of Ni-based sulfides in the catalytic process and its mechanism are further explored both experimentally and theoretically.
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PubMed
高影响因子
DALTON TRANSACTIONS
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2021
·Vol. 50
·期 29
·10059-10066
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IF 4.39
Xuejuan Xu,Yuchi Zhang,Yide Han,Junbiao Wu,Xia Zhang,Yan Xu
A hierarchical hollow Ni/Co-codoped MoS2 architecture was successfully prepared using a Ni/Co Prussian Blue analogue as the precursor followed by the solvothermal-assisted insertion of MoS42− and extraction of [Co(CN)6]3− at 200 °C for 32 h. The obtained Ni/Co-codoped MoS2 composite exhibited a hollow microcubic structural characteristic, and the morphology, structure, and chemical compositions were carefully characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS), respectively. The Ni/Co-codoped MoS2 composite used as an electrode material featured excellent glucose sensing activity and a high sensitivity of 2546 μA mM−1 cm−2 with a relatively low detection limit of 0.69 μM (S/N = 3). In addition, the Ni/Co-codoped MoS2 composite showed good anti-interference sensing performance in the presence of ascorbic acid (AA), lysine (Lys), cysteine (Cys), urea, H2O2, KCl, and other interferents. These experimental results revealed that the composite is a promising electrode material for enzyme-free glucose sensing, and the feasible synthetic strategy may provide an effective and controlled route to prepare other multi-metal substituted sulfide-based hierarchical structures with high electrochemical sensing performance.
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高影响因子
FUEL
·
2021
·
IF 6.609
Yiran Wang,Yuewen Shao,Lijun Zhang,Shu Zhang,Yi Wang,Jun Xiang,Song Hu,Guangzhi Hu,Xun Hu
Hydrophilicity/hydrophobicity is one of the most important parameters in heterogenous catalysts, as it significantly impacts the adsorption and activation of the reaction substrate. In this study, we have demonstrated that the treatment of the biochar derived from the pyrolysis of rice husks with HNO 3 oxidation and subsequent thermal treatment could remarkably increase the overall hydrophobicity of the Ni catalyst termed as Ni/biochar (treated). However, owing to the un-uniform surface of the biochar, some hydrophilic sites also exist. The co-presence of the hydrophobic and hydrophilic sites in the Ni/biochar (treated) facilitates the adsorption/activation of the C O functionality in vanillin and the aliphatic C C in eugenol. This renders the Ni/biochar (treated) catalyst with the much higher activity for hydrogenation of the unsaturated bonds than the Ni/biochar (un-treated) catalyst with mainly the hydrophilic sites. The reaction substrate like 1-chloro-2-nitrobenzene that could not form strong hydrogen bond with the biochar was less sensitive to the hydrophilicity/hydrophobicity of the catalyst. The results herein provide some reference information for optimizing catalytic performance via tailoring surface properties.
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ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 24
·2100290
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IF 18.808
Guanhua Zhang,Jin Hu,Yan Nie,Yanli Zhao,Lei Wang,Yizhou Li,Huaizhi Liu,Lizhen Tang,Xianan Zhang,Du Li,Ling Sun,Huigao Duan
Flexible and lightweight supercapacitors with superior mechanical flexibility and outstanding capacity are regarded as an ideal power source for wearable electronic devices. Meanwhile, incorporating additional novel characters such as transparency and electrochromism can further benefit the development of smart supercapacitors. Nevertheless, the application of the commonly used planar-structural current collectors is seriously restricted by their intrinsic properties such as poor rigidity, large thickness, and limited loading surface area. Flexible and ultralight current collectors with 3D architecture, high conductivity, and easy integration are believed to be the most appropriate alternatives to build high-performance supercapacitors. In this study, a novel and scalable manufacturing technique is developed to produce a flexible and ultralight 3D Ni micromesh (3D NM) current collector for supercapacitor. Flexible smart supercapacitor integrated by 3D NM and high active Ni–Co bimetallic hydroxide (3D NM@NiCo BH) delivers a considerable rate performance (60.6% capacity retention from 1 to 50 mA cm −2 ). Furthermore, the fabricated hybrid supercapacitor device integrated with electrochromic functionality can visually indicate the energy level by a color display. This flexible electrochromic supercapacitor based on ultralight 3D Ni micromesh provides a novel insight into multifunctional energy storage systems for smart wearable electronic devices.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2021
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IF 3.171
Qunhong Liu,Jiangtao Yang,Hongwei Zhang,Hongming Sun,Shuzheng Wu,Bingqing Ge,Rong Wang,Pei Yuan
The hydrogenation of petroleum resin (PR) is an effective process to prepare high value-added hydrogenated PR (HPR). However, the preparation of non-noble metal-based catalysts with high catalytic activity for PR hydrogenation still remains a challenge. Herein, a La promoted Ni-based catalyst is reported through the thermal reduction of quaternary NiLaMgAl-layered double hydroxides (NiLaMgAl-LDHs). The incorporation of La is beneficial to the reduction and stability of Ni particles with reduced particle size, and the increased alkalinity effectively mitigates the breakage of molecular chains of PR. As a result, the La promoted Ni-based catalyst exhibits high catalytic activity and excellent stability for PR hydrogenation. A hydrogenation degree of 95.4% and 96.1% can be achieved for HC 5 PR and HC 9 PR with less reduced softening point, respectively. Notably, the hydrogenation degree still maintains at 92.7% even after 100 hours’ reaction, much better than that without La incorporation or prepared using conventional impregnation method.
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SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Yujie Chen,Rui Sun,Wenhui Zhu,Zhen Zhang,Yali Chen,Shuo Wang,Qiliang Deng
Covalent organic frameworks (COFs) with predesigned bipyridine recognition sites (donated as BPD-COFs) were prepared by using 2, 2’-bipyridine-5, 5’-diamine and benzene-1, 3, 5-tricarbaldehyde as monomers, and the corresponding small molecule model compound (2, 2’-bipyridine-5, 5’-diiminebenzene, donated as BPDB) was synthesized by using benzaldehyde and 2, 2’-bipyridine-5, 5’-diamine. The fluorescence sensing property between BPD-COFs and BPDB were compared as the fluorescence sensing platform for the sensitive, selective and rapid detection of Ni 2+ . The unique structure characteristics such as large conjugated structure, high surface area, regularity pore canals and predesigned bipyridine link endow BPD-COFs with prominent fluorescence emission, enough space and strong specificity for Ni 2+ . The fluorescence quenching degree of BPD-COFs is four times more than that of BPDB. Besides better selectivity, BPD-COFs also displays the prominent advantages, such as the wider concentration range (4.20 × 10 −10 ∼1.26 × 10 -6 M) and lower limit of detection (6.80 × 10 -11 M) compared to that of BPDB (1.00 × 10 -7 ∼5.00 × 10 -7 M, 4.50 × 10 -8 M). Good spiked recoveries (>92.0 %) in chocolate and tea support that BPD-COFs is competent to detect Ni 2+ in real samples. All these results indicate that BPD-COFs is potential as a fast, sensitive, and accurate fluorescence sensing platform for the selective detection of Ni 2+ in complex system.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Zhengjie Gong,Tao Ma,Feng Liang
Organic dyes and nitrophenols in the textile industry are wastewater pollutants. In order to develop an efficient nanocatalysts to remove organic pollutants in wastewater, the trimetallic Ni@Cu@Pd nanoparticles (Ni@Cu@Pd NPs) with a blackberry-like structure was successfully prepared by a seed mediated growth method for the first time. The blackberry-like structure and the presence of Ni, Cu and Pd have been confirmed through TEM, SEM, EDS and XPS characterizations. Owing to the charge interaction between metal species along with blackberry-like structure, trimetallic Ni@Cu@Pd NPs delivered a record high catalytic activity toward the reduction of rhodamine B (RhB), with an apparent rate constant of 7.20 min −1 . Ni@Cu@Pd NPs also exhibited high activity for the catalytic reduction of methylene blue (MB) and 4-nitrophenol (4-NP). Moreover, the Ni@Cu@Pd NPs catalyst showed excellent stability and reusability.
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