Progress in Natural Science-Materials International
·
2022
·
IF 4.269
Yu Zhang,Xueai Teng,Zequn Ma,Rongming Wang,Woon-Ming Lau,Aixian Shan
Cu 2 O is an ideal template material for the preparation of transition metal hydroxide/oxyhydroxides with oxygen evolution reaction (OER) enhanced catalytic performance. Here, inspired by Pearson's principle, Cu 2 O wires were prepared and used as a sacrificial template to prepare Ni(OH) 2 ·0.75H 2 O hollow tubes (Ni(OH) 2 HTs) with highly improved surface roughness. Benefiting from unique structural advantages, the Ni(OH) 2 HTs showed excellent catalytic activity, rapid kinetics and a long-term stability as the OER catalyst, where an overpotential of only 207 mV was required to drive a current density of 10 mA cm −2 , an ideal kinetics with a Tafel slope as 79.8 mV dec −1 was calculated, and no obvious attenuation in chronoamperometry was discovered after operation for 24 h. This paper provides a novel template-assisted strategy to prepare high-performance transition metal-based OER catalysts possessing hollow and tubular structures.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Fengdong Qu,Wenan Shang,Dongting Wang,Shiyu Du,Tiju Thomas,Shengping Ruan,Minghui Yang
Multishell, stable, porous metal-oxide microspheres (Ni–Co oxides, Co3O4 and NiO) have been synthesized through the amorphous coordination polymer-based self-templated method. Both oxides of Ni and Co show poor selectivity to xylene, but the composite phase has substantial selectivity (e.g., Sxylene/Sethanol = 2.69) and remarkable sensitivity (11.5–5 ppm xylene at 255 °C). The short response and recovery times (6 and 9 s), excellent humidity-resistance performance (with coefficient of variation = 11.4%), good cyclability, and long-term stability (sensitivity attenuation of ∼9.5% after 30 days and stable sensitivity thereafter) all show that this composite is a competitive solution to the problem of xylene sensing. The sensing performances are evidently due to the high specific surface area and the nano-heterostructure in the composite phase.
研究领域:
材料科学
·
化学传感器
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yunfeng Wang,Yingang Gui,Shasha He,Jiacheng Yang
The application of conventional sensors is limited due to energy supply issues and environmental problems, and current triboelectric nanogenerator (TENG) based self-powered sensing systems is hard to meet the specific requirement. In this paper, TiO 2 /Ni/C composites were prepared using MOF-derived Ni/C materials for SO 2 F 2 detection at room temperature. The excellent pore structure and high electrical conductivity of Ni/C material greatly improve the sensitivity properties of TiO 2 . The TiO 2 /Ni/C composites-based SO 2 F 2 sensor exhibits a wide detection range of 5–200 ppm concentration and a fast response/recovery time of 26 s/9 s, while its response value for 200 ppm SO 2 F 2 is 18.34 times higher than that of the pure TiO 2 -based sensor. Furthermore, by modifying the PVDF film with TiO 2 , the permittivity of PVDF is greatly improved, and the surface potential is 2.6 times higher than that of pure PVDF film. Eventually, a dual-layer hybrid TENG based on TiO 2 /PVDF composite film was constructed. Its upper TENG powers the TiO 2 /Ni/C composite sensor, and the lower hybrid TENG drives the thermohygrometer to realize a self-powered temperature and humidity-corrected SO 2 F 2 sensing system, which can accurately implement SO 2 F 2 gas concentration alarms at 10 ppm, 50 ppm, and 100 ppm at different humidity levels. This work broadens the application of TENG in the field of self-powered gas sensing while providing a new idea to achieve the trace detection of SO 2 F 2 at room temperature.
研究领域:
材料科学
·
纳米技术
·
传感器学
·
环境监测
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2012
·Vol. 12
·期 6
·4607-4612
·
IF 1.563
Qi Xiaoxue,Zhou Shilin,Chen Jianrong,Wu Jiuyang,Gao Minghui,Zhang Shanqing,Miao Yuqing
A simple strategy for the preparation of a Ni(OH)2 nanoparticle film is described. Ni(OH)2 nanoparticles were synthesized in an aqueous solution of Ni2+ and tert-butylamine in the presence of small amounts of toluene, which induced the nanoparticles
to assemble a thin film on the aqueous surface. The obtained Ni(OH)2 nanoparticle film was easily transferred onto the electrode surfaces and exhibited stable electrochemical performance. The electrochemical behavior of various small biomolecules, including cysteine, homocysteine,
glutathione, histidine, glycine, cystine, methionine, lysine, aspartic acid, glutamic acid, phenylalanine, ascorbic acid, uric acid and dopamine, were studied at the Ni(OH)2 nanoparticle-film-modified electrode. The Ni(OH)2 nanoparticle film exhibits excellent direct,
unmediated electrocatalysis toward the oxidation of cysteine, homocysteine and ascorbic acid in a pH 7.4 buffer solution with a low onset potential and a high oxidation signal. This behavior differs from many reports in which small organic molecules are electrocatalyzed indirectly by the Ni(OH)2/NiOOH
redox couple in a strongly alkaline solution.
研究领域:
材料科学
·
电化学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Ruxia Song,Shihong Zhang,Yi He,Hongjie Li,Yi Fan,Teng He,Yihan Zhang,Yuxin Xiang,Huili Zhang
Ni-Cu/H-MWCNTs composite coatings with outstanding corrosion resistance and high wear resistance were prepared by the pulse electrodeposition technology. The micro-surface morphology and corrosion behavior of the coatings were represented by high-resolution field emission scanning electron microscopy , potential polarization curve, electrochemical impedance spectroscopy and scanning electrochemical microscope. The chemical composition and crystal structure of the coatings were characterized by energy dispersive spectrum, X-ray photoelectron spectroscopy and X-ray diffraction. The mechanical properties are studied by digital microhardness tester and multifunctional material surface testing machine. We found that the successful doping of H-MWCNTs changed the micro-structure and morphology of the Ni-Cu-based coating, making the coating smoother and denser. Furthermore, the average crystallite size of the Ni-Cu/H-MWCNTs (0.5 g/l) composite coating is 13.28 nm. The microhardness and average friction coefficient of the composite coating (0.5 g/l) are 587.04 Hv and 0.178, respectively. It was also found that the composite coating (0.5 g/l) has the best anti-corrosion performance, which is 3.2 times that of the pristine Ni-Cu-based coating. Through SECM diagrams, the composite coating (0.5 g/l) has excellent pitting resistance in 3.5 wt % NaCl solution.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yonglong Huang,Zhengkang Duan,Chuan Li,Tian Qiu
The catalytic dehydrogenation of diethanolamine to prepare iminodiacetic acid has attracted considerable research interest. However, the lack of understanding of the structure-activity relationship of the reaction can present a challenge to the control of the catalytic behavior. Concurrently, improving the catalytic performance and reducing the cost have also become urgent issues that require resolution. This work examined the catalytic mechanism of several Cu-Ni X /ZrO 2 catalysts, differing in Cu/Ni ratios, prepared by H 2 reduction, in the context of DEA dehydrogenation to elucidate the structure-activity connection and probable reaction mechanism. Subsequently, a strategy has been put out to generate metal (Ni and Co)-doped copper-zirconium catalysts using the co-precipitation-hydrazine hydrate reduction process. The synergistic effect between metals was combined with the improvement of the surface reaction of the catalyst by hydrazine hydrate through a more efficient preparation method, thereby enhancing the catalyst's overall performance. The representative catalyst Cu-Ni/ZrO 2 required a hydrazine hydrate reduction temperature and time of 40 °C and 30 min, and after 65 min of reaction, it exhibited a high conversion rate (96.3 %) and yield (93.7 %), and after five cycles, both the conversion rate and yield exceeded 85 %. Various characterization techniques have confirmed that Ni doping induced an alloying effect and a size effect. Additionally, the hydrazine hydrate reduction method was discovered to augment the specific surface area, surface hydroxyl groups, hydrophilicity, and optimize the pore size distribution of the catalyst while also regularizing its morphology, thereby significantly enhancing the activity and stability of the metal-doped copper-zirconium catalyst. This paper discussed the correlation between catalyst structure and reaction performance, as well as the catalytic conversion mechanism, which is anticipated to provide a novel reference for the preparation, performance control, and potential applications of dehydrogenation catalysts.
研究领域:
催化化学
·
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Yong Sun,Caixia Xiong,Quanchang Liu,Jiaren Zhang,Xing Tang,Xianhai Zeng,Shijie Liu,Lu Lin
Compared to biomass-derived 5-hydroxymethylfurfural (HMF), 5-formyloxymethylfurfural (FMF) is highly potential as feedstock to produce 2, 5-dimethylfuran (DMF) due to its properties of higher stability and enhanced hydrophobicity. Herein, catalytic conversion of FMF to DMF over Ni–Cu bimetallic catalyst with formic acid (FA) as hydrogen donor was investigated. A favorable DMF yield of 71.0% was obtained by catalyst 36Ni-12Cu/SBA-15. The conversion of FMF to DMF was controlled by surface reaction on the catalyst. In addition, catalytic mechanism investigation showed that the excellent catalytic performance and recyclability of catalyst were attributed to the formation of Cu–Ni alloy and its synergistic role. The incorporation of Cu and Ni substantially improved the selectivity of hydrogenolysis toward C–O ester bond. Meanwhile, FMF exhibited a better advantage to substitute HMF for producing DMF over Ni–Cu bimetallic catalyst with formic acid as a hydrogen donor.
研究领域:
化学工程
·
生物质能
·
催化科学
✓ 已验证
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Yuzhuo Wang,Yingjie Li,Liguo Yang,Xiaoxu Fan,Leizhe Chu
Co-gasification of biomass and waste plastics is a promising technology for H 2 production. In this work, Ni-CaO-Ca 12 Al 14 O 33 and Ni-CaO-MgO bi-functional materials were prepared from carbide slag for H 2 production in sorption-enhanced steam gasification experiments of cellulose/polyethylene mixtures. The H 2 production and CO 2 capture performances of Ni-CaO-Ca 12 Al 14 O 33 and Ni-CaO-MgO in sorption-enhanced steam gasification of cellulose/polyethylene were studied and compared. Density functional theory calculations, including the density of states, electron differential densities, and adsorption energies were performed to investigate the effect of supports on the stability and reactivity of Ni-CaO-based bifunctional materials at a microscopic level. The results exhibit that polyethene contributes to improving the H 2 production effectiveness of cellulose sorption-enhanced steam gasification, the optimum mass ratio of cellulose to polyethene is 0.5:0.5. The CO 2 capture capacity, H 2 yield, and H 2 concentration using Ni-CaO-Ca 12 Al 14 O 33 can be respectively 2.0, 2.6, and 1.4 times as high as those using Ni-CaO-MgO in the 20th cycle, which indicates the higher cyclic stability and catalytic activity of Ni-CaO-Ca 12 Al 14 O 33 . Density functional theory results also indicate that Ca 12 Al 14 O 33 can better retain the stable structure of Ni-CaO-based materials, which is consistent with the experimental results. Compared with MgO, Ca 12 Al 14 O 33 is a better framework for Ni-CaO-based bifunctional material for H 2 production in the sorption-enhanced steam gasification process.
研究领域:
能源科学
·
催化化学
·
环境工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xun Wang,Zewei Liu,Jian Yan,Daofei Lv,Xin Chen,Feng Xu,Xin Zhou,Zhong Li
Developing adsorbents with exceptional CH 4 /N 2 selectivity under high pressure is a crucial commercial requirement and a significant technical challenge for the industrial high-pressure swing adsorption (HPSA) in CH 4 /N 2 separation. Only a few adsorbents were reported to address this issue. In this work, we aimed to explore two microporous MOFs with low-polarity channels for high-pressure CH 4 /N 2 separation. The Ni(BDC)(DABCO) 0.5 and its isostructural analog Ni(TMBDC)(DABCO) 0.5 were synthesized, characterized, and examined for high-pressure CH 4 /N 2 adsorption property. Due to the lower polarity channel originating from tetramethyl groups, Ni(TMBDC)(DABCO) 0.5 exhibited an exceptional methane capacity of 4.23 mmol/g and an IAST selectivity of 5.1 for the CH 4 /N 2 binary mixture at a pressure of 10 bar, surpassing the majority of previously reported materials. The GCMC simulation revealed that the low-polarity pore surfaces in both materials exhibited a higher affinity for CH 4 molecules compared to N 2 molecules, under both ambient and high pressures. The breakthrough experiments showed that Ni(TMBDC)(DABCO) 0.5 exhibited excellent dynamic separation towards CH 4 /N 2 under both 1 bar and 5 bar, indicating great potential as an emerging candidate for the recovery of CH 4 from coal-mine methane in industrial PSA processes.
研究领域:
材料科学
·
化学工程
·
吸附技术
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2020
·Vol. 13
·期 18
·5004-5014
·
IF 7.962
Xinyang Ji,Yongxia Zhang,Zhuo Ma,Yunfeng Qiu
Graphical Enhanced, three ways ! Oxygen vacancy-rich Ni/NiO nanosheets with Schottky heterointerface are protected by ultrathin N-doped carbon layer and display high urea oxidation reaction (UOR) performance. Charge polarization of active sites at Schottky interface, enhanced conductivity owing to the presence of defective energy level, and synergistic effect between anti-corrosion carbon layer and active sites are responsible for the enhanced specific UOR activity and long-term stability. H 2 production via electrocatalytic water splitting is greatly hindered by the sluggish oxygen evolution reaction (OER). The urea oxidation reaction (UOR) draws specific attention not only because of its lower theoretical voltage of 0.37 V compared with OER (1.23 V), but also for treating sewage water. Herein, Ni/NiO nanosheets with an ultrathin N-doped C layer containing a Schottky Ni and NiO heterointerface is constructed. Because of the self-driven charge redistribution at the heterointerface, janus charge domains are successfully created to drive the cleavage of urea molecules. Meanwhile, the synergistic effect between N-doped C and Ni/NiO restrains the deactivation of active sites in alkaline solution. The catalyst displays 1.35 V for UOR at 10 mA/cm 2 , 0.27 V lower than that of OER. The final potential increase is only 2 mV after long-term stability test of 12 h for UOR, much smaller than the uncoated sample (38 mV). The present work shows that C-coated transition metal nanomaterials with oxygen vacancies and a Schottky heterointerface are promising candidates for simultaneously boosting UOR with both high activity and long-term stability.
研究领域:
材料科学
·
电化学
·
催化
·
纳米技术
·
能源材料
✓ 已验证
DOI
PubMed
高影响因子
Frontiers of Chemical Science and Engineering
·
2022
·Vol. 17
·期 2
·139-155
·
IF 4.803
Shi Haonan,Gu Xiaoyu,Shi Yinteng,Wang Dandan,Shu Sihao,Wang Zhongze,Chen Jixiang
Porous carbon-encapsulated Ni and Ni–Sn intermetallic compound catalysts were prepared by the one-pot extended Stöber method followed by carbonization and tested for in-situ hydrothermal deoxygenation of methyl palmitate with methanol as the hydrogen donor. During the catalyst preparation, Sn doping reduces the size of carbon spheres, and the formation of Ni–Sn intermetallic compounds restrain the graphitization, contributing to larger pore volume and pore diameter. Consequently, a more facile mass transfer occurs in carbon-encapsulated Ni-Sn intermetallic compound catalysts than in carbon-encapsulated Ni catalysts. During the in-situ hydrothermal deoxygenation, the synergism between Ni and Sn favors palmitic acid hydrogenation to a highly reactive hexadecanal that easily either decarbonylate to n -pentadecane or is hydrogenated to hexadecanol. At high reaction temperature, hexadecanol undergoes dehydrogenation-decarbonylation, generating n -pentadecane. Also, the C-C bond hydrolysis and methanation are suppressed on Ni-Sn intermetallic compounds, favorable for increasing the carbon yield and reducing the H 2 consumption. The n -pentadecane and n -hexadecane yields reached 88.1% and 92.8% on carbon-encapsulated Ni 3 Sn 2 intermetallic compound at 330 °C. After washing and H 2 reduction, the carbon-encapsulated Ni 3 Sn 2 intermetallic compound remains stable during three recycling cycles. This is ascribed to the carbon confinement that effectively suppresses the sintering and loss of metal particles under harsh hydrothermal conditions.
研究领域:
催化
·
化学工程
·
材料科学
·
能量转换
·
有机化学
✓ 已验证
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 5
·1200
·
IF 3.1
Wei Tong,Weiqiang Wang,Xiayu Leng,Jianli Song
To enhance the comprehensive performance of solid oxide fuel cells (SOFCs) ferritic stainless steel (FSS) interconnectors, a novel approach involving composite electrodeposition and thermal conversion is proposed to prepare Ni-doped Co-Mn composite spinel protective coatings on FSS surfaces. The process involves the composite electrodeposition of a Ni-doped Co-Mn precursor coating, followed by thermal conversion to obtain the Co-Mn-Ni composite spinel coating. Crofer 22H was used as the substrate and orthogonal experiments were designed to investigate the influences of deposition solution pH, stirring rate, cathode current density, and the element content of Mn and Ni on the surface morphology and properties of the composite coatings, respectively. The characterization of the prepared coatings was conducted through macroscopic and microscopic morphology observations of the component surface, energy dispersive spectroscopy (EDS) analysis, and area specific resistance (ASR) testing, etc. Finally, the optimized composite electrodeposition parameters and the Mn-Ni content ratio in the solution were obtained. Experimental results indicated that the composite spinel coating prepared with the optimized process parameters exhibited excellent adhesion to the substrate, and the diffusion and migration of Cr element has been effectively inhibited. Compared with the substrate, the ASR of the coated components has also been decreased simultaneously, which provided an effective method for the surface modification of SOFC FSS interconnectors.
研究领域:
材料科学
·
电化学
·
能源材料
·
表面工程
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）