E-POLYMERS
·
2021
·Vol. 21
·期 1
·590-605
·
IF 2.025
Li Zhao,Xianzhi Hu,Futing Zi,Yingmei Liu,Deqiong Hu,Peng Li,Huiling Cheng
In this study, a novel functional monomer N -(1-(2,4-difluorophenyl)-2-(1 H -1,2,4-triazol-1-yl)ethyl)acrylamide (NDTEA) was designed and synthesized, and was used to prepare Ni( ii ) ion-imprinted polymers (Ni( ii )-IIPs). Sixteen kinds of Ni( ii )-IIP (Ni( ii )-IIP 1–16 ) and corresponding non-imprinted polymers (NIP 1–16 ) were prepared by precipitation polymerization method. After optimized condition experiment, Ni( ii )-IIP 5 possessed maximum adsorption capacity and better imprinting factor under optimal experimental conditions which indicated by equilibrium adsorption experiments. The morphology and structural characteristics of Ni( ii )-IIP 5 were characterized by scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET). The adsorption selectivity of Ni( ii )-IIP 5 was analyzed by ICP-OES, and the results showed that Ni( ii )-IIP 5 had favorable selectivity recognition ability for Ni( ii ) when Cu( ii ), Co( ii ), and Cd( ii ) are used as competitive ions. The kinetic experiment indicated that the performance of Ni( ii ) adsorption on the surface of Ni( ii )-IIP 5 obeyed the pseudo-first-order model, and adsorption equilibrium was attained after 15 min. Isothermal adsorption process fitted to Langmuir and Freundlich isothermal adsorption models, simultaneously. The results showed that Ni( ii )-IIP 5 prepared by using a new functional monomer had better permeation selectivity and higher affinity for Ni( ii ), which also verified the rationality of the functional monomer design. At the same time, it also provided a broad application prospect for removal of Ni( ii ) in complex samples.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Zhuqian Xiao,Wenwen Zhao,Xingyi Wu,Chuang Xing,Jianbing Ji,Jianwei Mao
The metal immobilizing micro-circumstance is intensively relevant to its catalytic activity and selectivity. In order to obtain C 3,4 ketols by protection of C = O bonds against further hydrogenation, we proposed a promising strategy to modify adjacent circumstance for nickel complexes carbide catalysts (CCCs). The Sn promoted nickel CCCs exhibited high selectivity for cellulose conversion to C 3,4 ketols with the yield of 54.8%. The characterization results demonstrated the coordination environment of metals were reconstructed by C x N y species to form isolated nickel sites. The size-dependent electron transfer occurred when the sizes changed (from cluster to nanoparticles). This electron transfer facilitated promotion of the selectivity for C 3,4 ketols by protection of C O bonds against further hydrogenation. Combined with density functional theory calculations, the size-dependent electron transfer and Lewis base forming mechanism in Ni@C x N y structure were revealed. C x N y phases changed the electronic abundance of Ni sites and subsequently acted as Lewis base. Our work hinted that size of metallic catalysts should be optimized in specific loading circumstance to maximize the catalytic selectivity rather than simply chasing atomic efficiency.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yongxin Qian,Yang Tao,Wang Li,You Li,Tian Xu,Jinian Hao,Qinghui Jiang,Yubo Luo,Junyou Yang
Electronic packaging materials with efficient heat dissipation and anti-electromagnetic-interference performance are highly desirable to realize the long-term stable operation of highly integrated electronic devices. Such combined functions of heat dissipation and anti-electromagnetic-interference are achieved here by filling 3D CNF@C-Ni network skeleton in epoxy resins (EP). The CNF@C-Ni is a carbon nanofibers network skeleton embedded with micron flower-like C-Ni particles and has been obtained by carbonizing nickel metal–organic frameworks (Ni-MOF) embellished bacterial cellulose. The 3D CNF@C-Ni network skeleton provides a highly efficient heat transfer channel for EP, rendering a high thermal conductivity of 0.5 W·m −1 K −1 at room temperature for the 5 wt% CNF@C-Ni filled EP, ~2.8 times higher than that of pristine EP. In addition, the flower-like C-Ni particles realize an optimization in the impedance matching of CNF@C-Ni/EP, enabling a high electromagnetic wave absorption performance in the wave-transparent epoxy resins. In particular, a lowest reflection loss value of −49.77 dB at 13.44 GHz with a maximum effective bandwidth of 5.44 GHz (from 12.08 to 17.52 GHz) has been achieved in the 5 wt% CNF@C-Ni filled epoxy resins with a thickness of 2.2 mm. Such a new dual-functionated epoxy resin with combined high electromagnetic wave absorption and thermal management performance shows great potential in manufacturing of highly integrated electronic devices.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
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.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2021
·Vol. 17
·期 33
·2102097
·
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.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2021
·
IF 5.541
Haimiao Yu,Jiecheng Liu,Haojie Yang
A novel magnesium slag (MS) supported nickel-based catalysts (Ni/MS) was prepared and tested in catalytic reforming of volatiles derived from the pyrolysis of biomass components (cellulose, hemicellulose and lignin) and two biomass feedstocks (pine and straw). The physical and chemical properties of catalysts were characterized by XRD, TPR, BET, TEM, TPO-TGA and Raman spectroscopy. Ni/MS catalyst showed a higher tar removal efficiency than conventional Ni/γ-Al 2 O 3 under the same Ni loading. The tar conversion of cellulose hemicellulose and lignin reached 94.8 %, 92.0 % and 89.4 %, respectively over Ni/MS catalyst. In addition, the lignin content of the biomass feedstock appreciably affected the yield and dew point of tar. The highest increment in gas and H 2 yield (increased by 39.0 % and 106.4 %, respectively) was observed in cellulose. The highest decrement in tar dew point (from 166.4 ℃ to 53.0 ℃) was observed in hemicellulose. The excellent tar removal of Ni/MS was attributed to the metallic Ni and Ni-Fe alloy on catalyst surface. Besides, the MgO and Fe 2 O 3 phases in the support can retard the carbon deposition during the reaction. The results of this study are expected to provide insightful guidance for the application of Ni/MS catalysts for pyrolysis/gasification of biomass.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Zier Jin,Hong Xia,Wenxin Yang,Mingen Liu,Xiaoyu Liu,Jiao Xiang,Abdul Qayum,Liangsheng Hu,Lianfeng Duan,Wenhua Gao,Zhi Liu,Fushen Lu
Ammonia borane (NH 3 BH 3 , AB) has been considered as one of the most attractive candidates for chemical hydrogen-storage materials. Development of low-cost and high-performance catalysts for hydrogen generation from AB is highly desirable, which is still a huge challenge. Herein, Ru-Ni bimetallic nanoparticles were fabricated on (3-aminopropyl) triethoxysilane-functionalized reduced graphene oxide nanosheet (APTS-rGO) by a facile one-step in situ co-reduction strategy. The newly developed Ru 1 Ni 4 /APTS-rGO catalyst with hydrophilic interface and narrow particle size-distribution presented a remarkably enhanced catalytic activity for hydrolytic H 2 generation from AB, affording an ultra-high TOF value of 1559 min −1 . The APTS-rGO support was effective to minimize the aggregation of Ru-Ni nanoparticles, achieving the immobilization of ultrasmall Ru-Ni nanoparticles (2.0 nm) on support surface. The change in local charge density of catalyst surface caused by Ru-Ni synergistic effect and metals-support interaction improved the catalytic performance of Ru 1 Ni 4 /APTS-rGO. Hydrophilic NH 2 -containing interface ensured high dispersibility of catalysts in reaction solution, increasing the contact opportunities between active sites and AB molecules. These factors contributed together to the exceptional catalytic performance of Ru 1 Ni 4 /APTS-rGO. This catalytic system has potential applications in various catalytic fields due to its obvious advantages of the facile preparation method, good hydrophilicity, and the outstanding catalytic performance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xiaolan Li,Yang Liu,Jinliang Zhu,Panagiotis Tsiakaras,Pei Kang Shen
Herein, we introduce a facile approach to synthesize a unique class of Pt-M (M = Ni, Co) catalysts with a nanoflower structure for boosting both oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR). By controlling the surface-active agents, we modified the functional groups surrounding the Pt atoms, tuned the alloying of Pt and the transition metals Ni and Co, and prepared two different kinds of nanodendrites. Their successful synthesis depends on the selection and amount of surfactants (hexadecyltrimethylammonium bromide (CTAB), Polyvinylpyrrolidone (PVP)). Besides, by controlling reaction time, we also explored the forming procedures for Pt-Co globularia nanodendrite (Pt-Co GND) and Pt-Ni petalody nanodendrite (Pt-Ni PND). Our investigation highlights the importance of complex nanoarchitecture, which enables surface and interface modification to achieve excellent catalytic performance in fuel cell electrocatalysis. The characterization of the as-prepared catalysts reveals a high electrochemical surface area and mass activity (2041 m A m g P t - 1 and 950 m A m g P t - 1 for Pt-Co GND and Pt-Ni PND, respectively, for ORR). Furthermore, Pt-Co GND showed a high MOR activity, with a mass activity value recorded at 1615 m A m g P t - 1 which is far superior to that for Pt/C. Moreover, both catalysts retain high activity after accelerated durability tests (ADTs). The electron transfer number was calculated by performing the rotating ring-disk electrode (RRDE) measurements. Due to abundant active sites of Pt, both Pt-Co GND and Pt-Ni PND exhibit a 4e − pathway for ORR with electron transfer number of >3.95.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2019
·Vol. 9
·期 11
·952
·
IF 3.444
Huiyuan Xue,Jingjing Xu,Xingxing Gong,Rongrong Hu
The in-situ hydrodeoxygenation of bio-derived phenol is an attractive routine for upgrading bio-oils. Herein, an active trimetallic Ni-Cu-Co/Al2O3catalyst was prepared and applied in the in-situ hydrodeoxygenation of bio-derived phenol. Comparison with the monometallic Ni/Al2O3catalyst and the bimetallic Ni-Co/Al2O3and Ni-Cu/Al2O3catalysts, the Ni-Cu-Co/Al2O3catalyst exhibited the highest catalytic activity because of the formation of Ni-Cu-Co alloy on the catalyst characterized by using X-ray powder diffraction (XRD), temperature programmed reduction (TPR), N2physisorption, scanning electron microscope (SEM), and transmission electron microscope (TEM). The phenol conversion of 100% and the cyclohexane yield of 98.3% could be achieved in the in-situ hydrodeoxygenation of phenol at 240 °C and 4 MPa N2for 6 h. The synergistic effects of Ni with Cu and Co of the trimetallic Ni-Cu-Co/Al2O3catalyst played a significant role in the in-situ hydrodeoxygenation process of phenol, which not only had a positive effect on the production of hydrogen but also owned an excellent hydrogenolysis activity to accelerate the conversion of cyclohexanol to cyclohexane. Furthermore, the catalyst also exhibited excellent recyclability and good potential for the upgrading of bio-oils.Keywords:bio-derived phenol;Ni-Cu-Co/Al2O3;in-situ hydrodeoxygenation;cyclohexane;hydrogenolysis
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Enyang Liu,Xiaoli Yin,Jinhui Hu,Sirong Yu,Yan Zhao,Wei Xiong
Many attentions have been attracted to prepare superhydrophobic coatings on the metal surfaces for their prominent properties, especially the self-cleaning and anti-corrosion properties. In this work, a facile electrodeposition method was applied to fabricate hierarchical Cu-Ni coating on the 316 L stainless steel , and the followed myristic acid modification was used to lower the surface energy. The water droplet would remain spherical on this coating, and measured water contact angle and sliding angle were 161.27° and 7.8°, respectively. The contaminants on the coating surface could be easily carried away by the closed water droplets. In addition, the coating could effectively hinder the deposition of salt solution. Besides, the coating could endure long-term acid solution immersion and natural placement. Moreover, it was verified that this superhydrophobic Cu-Ni coating formed a robust barrier to block the transmission of chlorine ions , thus corrosion damage to steel surface could be effectively relieved. This superhydrophobic Cu-Ni coating provides a novel strategy and promising applications for preventing various metal surfaces from being contaminated and corroded.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Wenhao Zhang,Yuanhao Tang,Liangmin Yu,Xin-Yao Yu
Nickel-based metal oxides/hydroxides are promising electrocatalysts for oxygen evolution reaction. However, their electrocatalytic activity for hydrogen evolution reaction (HER) is very poor. Herein, taking Mo-incorporated nickel hydroxide (Mo-Ni(OH) 2 ) as an example, a facile, time-efficient, and low-temperature H 2 /N 2 plasma activation strategy is developed to activate the HER performance by constructing heterostructure. This kind of heterostructure is composed of metal, metal alloy, metal nitride , and oxygen vacancy-riched metal hydroxide with more exposed catalytically active sites, enhanced mass activity, and accelerated electron transport. The optimized plasma-activated Mo-Ni(OH) 2 (P-Mo-Ni(OH) 2 ) manifests superior HER performance to pristine Mo-Ni(OH) 2 and even comparable to the benchmark Pt/C catalyst in alkaline solution. Moreover, when assembling a two-electrode urea-assisted water electrolysis system by using P-Mo-Ni(OH) 2 as both cathode and anode, the assembled cell only need a small voltage of 1.36 V to achieve a current density of 10 mA cm −2 and exhibits extremely stable catalytic performance up to 1000 h.
✓ 已验证
产品关联
DOI
高影响因子
Journal of CO2 Utilization
·
2019
·
IF 5.189
Feiyang Hu,Sai Tong,Kun Lu,Cheng-Meng Chen,Fang-Yuan Su,Jian Zhou,Zhang-Hui Lu,Xuewen Wang,Gang Feng,Rongbin Zhang
The reduced oxide graphene (RGO) supported Ni-based catalysts is prepared and modified with ceria (Ni-Ce/RGO) for CO 2 methanation for the first time in the present work, and compared with the active carbon (AC) and γ-Al 2 O 3 supported samples. The results show that the catalytic activity of the samples without ceria follow the order Ni/RGO > Ni/γ-Al 2 O 3 > Ni/AC, vs . samples with ceria Ni-Ce/RGO > Ni-Ce/γ-Al 2 O 3 > Ni-Ce/AC. The activities of all samples were greatly improved after ceria modification. The Ni-Ce/RGO works the best for CO 2 methanation, which could reach the highest CO 2 conversion of 84.5% and the highest methane yield of 83.0% at 350 °C with atmospheric pressure. The excellent catalytic performance of Ni-Ce/RGO could be attributed to the special support effect of RGO and the ceria promotion effect. The support effect of RGO could be attributed to its large surface area and surface oxygen-containing functional groups, which results in stable anchoring of the active metal. The addition of ceria promotes the Ni dispersion on the supports as well as to accelerate the positive reaction due to the oxygen vacancies of ceria.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）