JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 12
·3583-3595
·
IF 2.5
Chen Quangang,He Yi,Yan Siming,Zhou Huilian,Li Hongjie,Li Zhiyuan,Wei Kaijun,Chen Wen,Yan Jing,Wu Guiyang,Yuan Xi
The Ni-P-WS 2 composite coatings with prominent structures were constructed by composite electrodeposition by adding tungsten disulfide (WS 2 ) nanoparticles to the electroplating solution. Modification of the Ni-P-WS 2 composite coating with hexadecyltrimethoxysilane (HDTMS) is going to achieve the superhydrophobic effect. The successful construction of the superhydrophobic surface was demonstrated by X-ray diffractometer (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and contact angle measurement (CA). Electrochemical impedance spectroscopy (EIS) was used to investigate the corrosion resistance. The finding indicates that hexadecyltrimethoxysilane (HDTMS) reduces the surface energy of the Ni-P-WS 2 composite coating, generates a film on its rough surface, blocks the corrosive medium, and improves the corrosion resistance of the composite coating. The Ni-P-WS 2 nanocomposite coating’s water contact angle is 156.8° and its sliding angle is 8° at 3 g/L of WS 2 particle concentration. And the composite plating has the highest self-corrosion potential ( E corr = − 0.285 V) and the lowest self-corrosion current density ( i corr = 3.206 μA cm −2 ), with a better corrosion resistance. In addition, the prepared superhydrophobic coating showed excellent corrosion resistance under the hydrophobic barrier and the layer barrier of WS 2 nanosheets.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Zhige Zhang,Guofeng Zhao,Wenyang Li,Jiawei Zhong,Jun Xie
The efficient conversion of renewable biogas has attracted ever-increasing interest in past decades. Ni-CeO 2 -Al 2 O 3 supported on monolithic SiC-foam (denoted as Ni/CeO 2 -Al 2 O 3 /SCF) is designed and applied in biogas reforming. The monolithic Ni/CeO 2 -Al 2 O 3 /SCF catalysts were deeply characterized by XRD, ICP-AES, SEM, HR-TEM, CO 2 -TPD, etc. The cycle between CeO 2 -Al 2 O 3 and CeAlO 3 was verified by in-situ CH 4 /CO 2 -TPSR, and the catalytic role of CeAlO 3 in coke elimination and CO 2 activation was further confirmed. Due to the uniform distribution of Ni nanoparticles (NP S ) and the activation of CO 2 by CeAlO 3 , Ni/CeAlO 3 -Al 2 O 3 /SCF shows excellent catalytic stability to inhibit sintering and eliminate carbon deposition. At 900 °C and a gas hourly space velocity (GSHV) of 24000 mL g Cat -1 h −1 , excellent CH 4 /CO 2 conversion of 86/99% are initially achieved over Ni/CeAlO 3 -Al 2 O 3 /SCF catalyst, followed by slight decrease after 140 h, and remain basically stable for the next 260 h.
研究领域:
化学工程
·
能源科学
·
催化材料
✓ 已验证
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-9
·
IF 16.6
Zang Ying,Lu Di-Qiu,Wang Kun,Li Bo,Peng Peng,Lan Ya-Qian,Zang Shuang-Quan
Catalysts capable of electrochemical overall water splitting in acidic, neutral, and alkaline solution are important materials. This work develops bifunctional catalysts with single atom active sites through a pyrolysis-free route. Starting with a conjugated framework containing Fe sites, the addition of Ni atoms is used to weaken the adsorption of electrochemically generated intermediates, thus leading to more optimized energy level sand enhanced catalytic performance. The pyrolysis-free synthesis also ensured the formation of well-defined active sites within the framework structure, providing ideal platforms to understand the catalytic processes. The as-prepared catalyst exhibits efficient catalytic capability for electrochemical water splitting in both acidic and alkaline electrolytes. At a current density of 10 mA cm −2 , the overpotential for hydrogen evolution and oxygen evolution is 23/201 mV and 42/194 mV in 0.5 M H 2 SO 4 and 1 M KOH, respectively. Our work not only develops a route towards efficient catalysts applicable across a wide range of pH values, it also provides a successful showcase of a model catalyst for in-depth mechanistic insight into electrochemical water splitting.
研究领域:
电化学
·
催化
·
材料科学
·
能量转换
✓ 已验证
DOI
PubMed
高影响因子
Chinese Physics B
·
2016
·Vol. 25
·期 8
·088201
·
IF 1.436
Chao Li,Jun-Jie Sun,Duo Chen,Guang-Bing Han,Shu-Yun Yu,Shi-Shou Kang,Liang-Mo Mei
A facile step-by-step approach is developed for synthesizing the high-efficiency and magnetic recyclable Fe3O4@SiO2@Ag@Ni trepang-like nanocomposites. This method involves coating Fe2O3 nanorods with a uniform silica layer, reduction in 10% H2/Ar atmosphere to transform the Fe2O3 into magnetic Fe3O4, and finally depositing Ag@Ni core-shell nanoparticles on the L-lysine modified surface of Fe3O4@SiO2 nanorods. The fabricated nanocomposites are further characterized by x-ray diffraction, transmission electron microscopy, scanning electron microscope, Fourier transform infrared spectroscopy, and inductively coupled plasma mass spectroscopy. The Fe3O4@SiO2@Ag@Ni trepang-like nanocomposites exhibit remarkably higher catalytic efficiency than monometallic Fe3O4@SiO2@Ag nanocomposites toward the degradation of Rhodamine B (RhB) at room temperature, and maintain superior catalytic activity even after six cycles. In addition, these samples could be easily separated from the catalytic system by an external magnet and reused, which shows great potential applications in treating waste water.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jie Chu,Chen Liang,Wenyan Xue,Pu Huang,Yafei Guo,Ruilin Wang,Jian Sun,Weiling Li,Chuanwen Zhao
Integrated CO 2 capture and utilization by reverse water gas shift (ICCU-RWGS) reaction for syngas production for C1 chemical industry has gained increasing attention. Designing highly active bifunctional materials that enables CO 2 adsorption and in-situ conversion is essential. In this work, Ni-Na 2 ZrO 3 bifunctional materials are prepared by different synthetic methods for ICCU-RWGS. N 2 physisorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), CO 2 temperature-programmed desorption (CO 2 -TPD) and H 2 temperature-programmed reduction (H 2 -TPR) analysis reveals that Ni-Na 2 ZrO 3 -CP prepared by the co-precipitation (CP) method shows small Ni crystalline size, moderate surface basicity, and excellent reducibility. ICCU-RWGS performance is investigated under isothermal conditions of 650 °C, 10 %CO 2 and 35 %H 2 . The results indicate that Ni-Na 2 ZrO 3 -CP demonstrates excellent performance in ICCU-RWGS, with a notable CO 2 capture capacity of 3.76 mmol CO 2 /g and a CO production rate of 3.10 mmol CO/g. Additionally, it exhibits relatively good operational stability. Detailed reaction paths of the ICCU-RWGS procedure for the Ni-Na 2 ZrO 3 bifunctional materials are proposed. The findings will shed new perspectives on the design of synthetic bifunctional catalysts for ICCU-RWGS.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Jiqiong Lian,Yihui Wu,Houan Zhang,Siyong Gu,Zhiwei Zeng,Xiaoyun Ye
Design of inexpensive and highly efficient bifunctional electrocatalyst is paramount for overall water splitting . In this study, amorphous Ni–Fe–P alloy was successfully synthesized by one-step direct-current electrodeposition method. The performance of Ni–Fe–P alloy as a bifunctional electrocatalyst toward both hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) was evaluated in 30 wt% KOH solution. It was found that Ni–Fe–P alloy exhibits excellent HER and OER performances, which delivers a current density of 10 mA cm −2 at overpotential of ∼335 mV for HER and ∼309 mV for OER with Tafel slopes of 63.7 and 79.4 mV dec −1 , respectively. Moreover, the electrolyzer only needs a cell voltage of ∼1.62 V to achieve 10 mA cm −2 for overall water splitting. The excellent electrocatalytic performance of Ni–Fe–P alloy is attributed to its electrochemically active constituents, amorphous structure, and the conductive Cu Foil.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Xin Song,Fangjun Shao,Zijiang Zhao,Xiaonian Li,Zhongzhe Wei,Jianguo Wang
It is challenging to develop an alkyne semi-hydrogenation catalyst with both high selectivity and high activity, especially at low temperatures and low pressures. Herein, a single-atom Ni-modified Al2O3-supported Pd is proposed as a modulation strategy to optimize the selectivity of alkyne semi-hydrogenation. Sphere-difference-corrected transmission electron microscopy and synchrotron radiation confirm that Ni single atoms enter the alumina lattice in a highly dispersed state, while Pd is loaded on the Ni-modified support in the form of nanoparticles. For the semi-hydrogenation of phenylacetylene, the Pd0.5/Ni0.5@γ-Al2O3 catalyst with Pd and Ni loadings of 0.45 and 0.43 wt %, respectively, achieves 98% conversion and 94% selectivity at 298 K and 0.1 MPa. It also possesses good stability, as the activity remains unchanged after 10 cycles of application. The Pd0.5/Ni0.5@γ-Al2O3 catalyst inherits the high activity of Pd and the high selectivity of Ni to achieve efficient semi-hydrogenation of phenylacetylene at low temperatures and pressures, benefiting from the synergistic effect of Pd and Ni.
研究领域:
催化
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2018
·
IF 0
Xu Huang,Xuezhang Xiao,Xuancheng Wang,Zhendong Yao,Chuntao Wang,Xiulin Fan,Lixin Chen
Li-Mg-B-H system with the composition of 2LiBH 4 -MgH 2 is one of the most promising reversible hydrogen storage materials because of the extremely high hydrogen storage capacity (11.5 wt%). Yet, sluggish kinetics with high desorption temperature (~ 400 °C) hindered its practical applications. Herein, a highly efficient catalyst of nanoNi@g-C 3 N 4 , comprised of transition metal nanocatalyst and carbon-based nonmetal material, was designed and fabricated to dramatically reduce its initial hydrogen desorption temperature to as low as ~105 °C, and eliminate induction period between the two dehydrogenation steps of 2LiBH 4 -MgH 2 by reducing the activation energy for the dehydrogenation of LiBH 4 from 200±6 to 126±7 kJ/mol. Multiple postmortem analyses revealed that the in situ formed MgNi 3 B 2 NPs and the H + defects on g-C 3 N 4 play the key role in synergically enhancing the hydrogen reversible desorption/absorption kinetics at low temperature: 1) in situ formed MgNi 3 B 2 acts as nucleation center of MgB 2 and leads to an excellent catalytic effect to accelerate the dehydrogenation kinetics of 2LiBH 4 -MgH 2 ; 2) the H + defects on g-C 3 N 4 , will interact with the H – in LiBH 4 to trigger the release of H 2 at low temperature and destabilize LiBH 4 and MgH 2 to form Li 3 N and Mg 3 N 2 respectively for the high electronegativity of N: 3) these in situ formed intermediates of Li 3 N and Mg 3 N 2 will be readily rehydrogenated as highly reversible Mg(NH 2 ) 2 and LiH. This novel transition metal and g-C 3 N 4 catalytic composites could provide alternative insights into designing nanosized catalytic hydrogen storage system with low desorption temperature and high capacity for hydrogen-fueled applications.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Huajie Lan,Lei Tian,Wenfeng Wang,Yuan Li,Shumin Han,Lu Zhang
The currently used β -Ni(OH) 2 for alkaline nickel batteries are falling short of higher capacity demand. In contrast, α -Ni(OH) 2 with high theoretical capacity can address this need. However, the α -Ni(OH) 2 suffers from poor stability and intrinsic low electrical conductivity. Herein, we designed La/Ce-doped spherical α -Ni(OH) 2 and study the effect of La/Ce on the structure and electrochemical properties of α -Ni(OH) 2 . The increased specific surface area of the α -Ni(OH) 2 with La/Ce doping reduces the electron transfer resistance. The La/Ce-doped α -Ni(OH) 2 with 2 at% La (Ni-La-2) and 3 at% Ce (Ni-Ce-3) doping deliver high capacities of ∼365 mAh g –1 and ∼373 mAh g –1 , respectively, which is only 309 mAh g –1 for the pure α -Ni(OH) 2 . Meanwhile, the La/Ce-doping stabilizes the structural robustness of the α -Ni(OH) 2 during cycling. Notably, Ni-La-2 shows a superior stable cycling life with a capacity retention of ∼95 % after 400 cycles, which is ∼20 % higher than that of pure α -Ni(OH) 2 .
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
DOI
高影响因子
Green Chemical Engineering
·
2022
·
IF 0
Jianguo Liu,Jiangmin Sun,Thishana Singh,Shanshan Lin,Longlong Ma
Although precious transition metals such as palladium, platinum, and iridium are widely used in hydrogenation reactions, the earth-abundant transition metal-catalyzed highly selective semi-hydrogenation of terminal alkynes to terminal alkenes remains poorly developed and a challenge. Herein we demonstrate the excellent selective, cost-effective semi-hydrogenation of terminal alkynes via a novel graphene encapsulated Ni@N/C catalyst. The graphene layer encapsulated nano-catalyst Ni@N/C could significantly avoid metal leaching and improve the stability of the catalyst. The strong interaction of nitrogen with the Ni nanoparticles regulates the activity of Ni towards selective semi-hydrogenation of terminal alkynes. Substrates having un-functionalized as well as functionalized substituents, and substrates having sensitive functional groups (olefins, ketones) which pose a challenge to hydrogenate, were semi-hydrogenated with excellent conversion (up to 99%) and selectivity (up to 99%) under optimized reaction conditions.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
FUEL
·
2021
·
IF 6.609
Xincheng Cao,Feng Long,Qiaolong Zhai,Jiaping Zhao,Junming Xu,Jianchun Jiang
To develop an efficient Ni-based catalyst for converting renewable fatty acids into high value-added fatty alcohols under mild reaction conditions, the scope of metal oxide modified nickel catalysts was scrutinized. The results show that MoO x modified Ni/CeO 2 catalyst exhibits the excellent catalytic performance in the conversion of fatty acids to form corresponding alcohols at mild reaction conditions (235 °C, 3.0 MPa H 2 ). Using stearic acid as a model substrate, Ni-MoO x /CeO 2 catalyst shows the 98.0% conversion and 96.2% selectivity to stearyl alcohol, which is significantly higher than that of Ni/CeO 2 catalyst and of a physical mixture of both Ni/CeO 2 and MoO x /CeO 2 . Detailed characterization (XRD, Raman, XPS, in situ CO-FTIR, HRTEM, and EPR) indicates that NiMoO 4 is the mainly active phase in the pre-reduced bimetallic catalysts. After reduction at 500 °C in a H 2 flow, the surface of Ni metal is decorated by the MoO x species, the phenomenon is similar to the strong metal-support interaction (SMSI) previously observed on reducible oxides. The presence of MoO x species in the bimetallic Ni-MoO x /CeO 2 catalyst not only improves the dispersion of metallic Ni, but also promotes the charge transfer from Ni to Mo. The electronic interaction at the interface of Ni and MoO x provides synergistic catalysis sites of electron-deficient Ni and MoO x species, which is primarily responsible for the excellent catalytic performance of the bimetallic Ni-MoO x catalyst. Additionally, the introduction of Mo species provides much oxygen vacancy sites for the adsorption of fatty acids, which results in high activity for the conversion of fatty acids. The insights into the synergistic catalysis between Ni and MoO x will provide new possibilities in the design of efficient Ni-based catalysts for selective hydrogenation of other biomass-derived compounds containing carboxylic group.
研究领域:
催化化学
·
可再生资源转化
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Bo Yu,Guohua Jiang,Wangcong Xu,Cong Cao,Yongkun Liu,Na Lei,Uwamahoro Evariste,Pianpian Ma
The NiMoO 4 /CoMoO 4 nanorod arrays wrapped by Ni-Co-S nanosheets were successfully grown on the surface of carbon cloth (NCMOS@CC) by combining of hydrothermal and electrochemical deposition methods. And the as-prepared NCMOS@CC showed good flexibility. The obtained NCMOS@CC as electrode materials were tested in a three-electrode system, showing a pretty good specific capacitance of 778.1 F g −1 at a current density of 0.5 A g −1 and excellent rate capability using 1 M KOH as the electrolyte. The flexible asymmetric supercapacitors (FASCs) were further fabricated using NCMOS@CC as the positive electrode and activated carbon@carbon cloth (AC@CC) as the negative electrode. The fabricated FASCs exhibited a safe working range with a potential window of 0–1.6 V with a maximum energy density of 33.1 Wh Kg −1 at 0.25 A g −1 and maximum power density of 3195 W kg −1 at 4 A g −1 . The fabricated FASCs even bent at different angles still showed good flexibility and stable electrochemical properties . These performances enable the NCMOS@CC to be one of the potential flexible electrodes for using in flexible energy storage devices.
研究领域:
材料科学
·
能源存储技术
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）