MATERIALS RESEARCH BULLETIN
·
2015
·
IF 2.288
Yu-zhi Su,Qi-zhi Xu,Qi-sui Zhong,Chan-juan Zhang,Shu-ting Shi,Chang-wei Xu
Glycerol has a very high value of onset potential on the Au/C electrode, so it is difficult to be electrochemically oxidized on the pure Au electrocatalyst. When Co 3 O 4 , NiO, Mn 3 O 4 and MgO are added to the Au/C, the values of onset potential of glycerol oxidation shift negatively 171, 191, 156 and 215 mV than that on the Au/C. Au–Co 3 O 4 (wt 4:1)/C, Au–NiO(wt 5:1)/C, Au–Mn 3 O 4 (wt 5:1)/C and Au–MgO(wt 2:1)/C show the highest activity for glycerol electrooxidation for respective oxide promoted Au/C. The addition of oxides to the Au/C obviously promotes the catalytic activity and stability for glycerol electrooxidation.
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2015
·
IF 2.252
Xiucui Ji,Qiang Xu,Ting Zhou,Xiaotong Wang,Hui Xu,Xue Yao,Wei Lan,Yong Kong
Poly(aniline- co - m -aminophenol)(PANMA)/graphene/NiO nanocomposite was synthesized and applied as a supercapacitor electrode for the first time. Graphene/NiO nanocomposite was first synthesized via a hydrothermal synthesis method from Ni(NO 3 ) 2 ·6H 2 O, urea, and graphite oxide. NiO nanoparticles were distributed uniformly on both sides of the graphene. Then, PANMA was deposited in situ on the surface of the graphene/NiO nanocomposite via the copolymerization of aniline and m -aminophenol. The obtained nanocomposite has a similar porous morphology with that of PANMA. Experimental results indicate that the synergistic contributions from PANMA, graphene and NiO enable the composite electrode with substantially improved energy storage performance metrics. The nanocomposite shows a high specific capacitance of 562 F g −1 at a current density of 0.5 A g −1 , a good rate capability even at high current densities and a better long-term cycling stability.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Haiping Lei,Tianwei Wei,Jiguo Tu,Yiwa Luo,Suqin Li,Shuqiang Jiao
NiO possesses a high theoretical capacity, but its poor conductivity and significant volume changes during the redox process lead to severe electrochemical performance degradation, limiting its applications. In this study, flower-like structure NiO@C composite materials were synthesized via a hydrothermal method. The particle size of the material is approximately 10–16 μm, with a well-defined morphology of carbon material composite. Al-NiO@C batteries were constructed using NiO@C cathode and subjected to electrochemical performance testing. The initial discharge capacity of NiO@C composite material at a current density of 200 mA g −1 is 126 mA h/g, and even after 150 cycles, it retains a discharge specific capacity of 54 mA h/g. In contrast, the pure NiO exhibits an initial capacity of only 49 mA h/g, which decreases to 23 mA h/g after 150 cycles. The cycling stability of NiO@C material is significantly better than that of NiO alone. This improvement is attributed to the enhanced conductivity of NiO material by the addition of carbon material, which provides improved electron/ion transport properties. Additionally, the inclusion of carbon material helps alleviate the volume changes of NiO during the reaction process, thereby enhancing the overall electrochemical performance of Al-NiO batteries.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Bin Cheng,Zhenhu Cao,Li Liao,Wentao Chen,Hongtao Cao,A.A. Rogachev,M.A. Yarmolenko,Hongliang Zhang
With the rapid advancement of electrochromic technology, providing quasi-solid-state electrolytes that offer superior performance and lower costs holds significant promise for practical applications of electrochromic devices. Herein, a strategy of employing a facile fabrication method for quasi-solid electrolyte and quasi-solid-state electrochromic devices by in-situ UV curing, aims to enhance interfacial interactions, thereby accelerating response time and improving cycling stability. After 120 s of UV polymerization, the electrolyte with PEO accounting for 40 wt% of PEGDA and PEO mixture exhibited excellent conductivity (2.04 × 10 −3 S cm −1 ), thermal stability, optical transmittance (＞85 % @633 nm) and interface bonding strength (0.11 Mpa). These remarkable characteristics lay the foundation for fabricating a quasi-solid-state WO 3 –NiO ECD with an ultra-fast response time of 0.96 s/3.48 s and excellent long-term cycling stability of more than 20000 cycles. This outcome introduces a novel approach to fabricating high-performance electrochromic devices, significantly enhancing their potential applications across various fields.
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Dengkun Chen,Yusha Xie,Tao Chen,Tao Zhang,Yaosong Huang,Xiaoyan Qiu
Solution-processed NiO film is widely applied as the hole transport layer (HTL) of metal halide perovskite solar cells (PSCs). In general, a process temperature over 300 °C is necessary to improve the nucleation and crystallization of NiO grains. This temperature is higher than the glass transition temperature of most low-cost flexible substrates . In this paper, NiO nanoparticle water solution was prepared to spin-coat NiO films at a treatment temperature of 100 °C. The solar cell with the invert planar structure of ITO/NiO/CH 3 NH 3 PbI 3 /ZnO/Ag presented a power conversion efficiency of 11.24 %, which is comparable with that of similar CH 3 NH 3 PbI 3 solar cells with the NiO HTLs prepared at the high temperature. The water-processed NiO HTL greatly decreases the process temperature and simplifies the preparation process of PSCs, showing promising applications in low-cost flexible PSCs.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Yuanyuan Tian,Hui Wang,Shengli Liu,Bo Zhang
Zirconium (Zr)-doped NiO films with different contents were successfully synthesized via the chemical spray pyrolysis technique. The structure, morphology, optical and electrochemical behaviors of these films were investigated by X-ray diffraction (XRD), Raman spectrometer, scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), UV–Vis-NIR spectrophotometry, cyclic voltammetry (CV), and chronoamperometry (CA). XRD results suggested that the synthesized samples have the cubic crystal structure and a preferred orientation along the plane (111). Raman spectra further confirmed the successful incorporation of zirconium ions into the NiO films. SEM images explained that the surfaces of the doped films were composed of uniform and dense nanoparticles. EDS analysis suggested that Zr, Ni and O elements were uniformly distributed on the films. The optical results showed that the band gap decreases from 3.53 eV to 3.47 eV as the increase of zirconium doping content. The electrochemical analysis suggested that zirconium doping improved the specific capacitance of the NiO films (the NiO film with the Zr amount of 7 %, 59 F/g at 6 mV/s). In addition, the NiO film with 5 % Zr doped amount exhibited the largest Δ OD (81 %), the largest CE (60.37 cm 2 /C), and the fastest coloring time ( t c =2.1 s) and bleaching time ( t b = 2.4 s). These results showed that this film had the excellent electrochromic properties, suggesting that the optimal Zr doped amount of NiO films is 5 %. As a novel kind of electrochromic material, the Zr-doped NiO film has broad application prospects in smart windows, green buildings and energy efficient utilization fields.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yuqi Zhang,Bang Gu,Zhipeng Zhang,Bohai Wang,Vitaly Ordomsky,Andrei Khodakov,Futing Xia,Wenhao Fang
The catalytic transfer hydrogenation (CTH) of furfural (FF) to furfuryl alcohol (FA) plays a key role in biomass valorization by transforming a renewable platform molecule into a high-value chemical used in resins and polymers. By using alcohols instead of pressurized H 2 , the process enhances safety and energy efficiency. However, the use of non-precious metal single atoms (NPM-SAs) catalysts in CTH of FF to FA under mild conditions remains underexplored. In this study, Co single atoms (Co SAs) were anchored onto a NiO support using a straightforward one-pot NaBH 4 hydrolysis-reduction method, avoiding the high-temperature pyrolysis. The developed Co SAs/NiO catalyst achieved 97% FA selectivity with 99% FF conversion at 120 °C under 1 bar of Ar. FA productivity reached 18.9 mol FA mol Co −1 h −1 and increased to 37.8 mol FA mol Co −1 h −1 when Ar was replaced with an atmospheric H 2 , achieving the highest FA productivity under the milder reaction conditions among all the reported Co-based catalysts. Structural and mechanistic studies using XANES, FT-EXAFS, TEM, in situ DRIFT-IR, and kinetic experiments revealed a strong synergy between Co SAs and the NiO support. Co−O 3 single atoms anchored at oxygen vacancies on the NiO support acted as the key active sites, facilitating the reaction via a “ Meerwein-Ponndorf-Verley ” mechanism. Compared to NiO and Co nanoparticles, Co SAs enhanced FF and isopropanol adsorption with a facilitated FA desorption, lowering the reaction barrier and enhancing the overall efficiency. Additionally, the catalyst demonstrated an excellent stability over eight consecutive cycles without metal leaching and proved effective for CTH of various aldehydes. This study highlights the potential of NPM-SAs catalysts synthesized by a simple method for efficient and selective CTH reactions under mild conditions.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Bohao Kong,Hefeng Yuan,Zhehao Liu,Zizai Ma,Xiaoguang Wang
Engineering platinum-free catalysts for hydrogen evolution reaction (HER) with high activity and stability is essential for electrochemical hydrogen production . In this paper, we report the synthesis of cobalt-doped AlNi 3 /NiO (Co-AlNi 3 /NiO) electrode with three-dimensional nanoporous structure via chemical dealloying method. Density functional theory (DFT) calculations reveal that Co-AlNi 3 /NiO can accelerate water adsorption / dissociation and optimize adsorption–desorption energies of H* intermediates, thus improving the intrinsic HER activity. Both the introduction of Co and Al can efficiently ameliorate the electronic density around Ni sites of NiO and AlNi 3 , which can effectively reduce the energy barrier towards Volmer–Heyrovsky reaction and thus synergistically promote the hydrogen evolution. Benefiting from the large electrochemical active surface area , high electrical conductivity and electronic effect, the nanoporous Co-AlNi 3 /NiO catalyst exhibits remarkable HER activity with an overpotential of 73 mV at a current density of 10 mA cm −2 in alkaline condition, outperforming most of the reported non-precious metal catalysts . The nanoporous Co-AlNi 3 /NiO catalyst can operate continuously over 1000 h at high current densities with a robust stability. This work provides a new vision for the development of low-cost and efficient electrocatalysts for energy conversion applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Yubiao Li,Yu Liu,Xueqian Wang,Yixing Ma,Ping Ning,Langlang Wang,Xiang Li,Rui Cao
Activated alumina-based composite oxide support is a commonly used support in hydrodesulfurization (HDS) catalysts, which not only retains the performance advantages of each component in the composite oxide support, but also significantly improves the defects of a single activated alumina support, such as the strong metal-support force of interaction. In this study, NiO-Al 2 O 3 composite support was prepared by introducing NiO-modified Al 2 O 3 , and MoS 2 /NiO-Al 2 O 3 catalysts were prepared for the hydrodesulfurization of COS by liquid phase reduction method. In the COS hydrogenation reaction, the MoS 2 /NiO-Al 2 O 3 catalyst achieved complete conversion of COS at 220 °C and showed more than 99.9% H 2 S selectivity. In stability tests, the catalyst maintained a COS conversion of over 99% throughout the 23-h hydrogenation reaction. Various characterization results show that the NiO-Al 2 O 3 composite support prepared by introducing NiO-modified Al 2 O 3 weakens the metal-support interaction force between MoS 2 and NiO-Al 2 O 3 composite support, which is conducive to the synthesis of MoS 2 with multilayer and long wafer structures. And it can significantly increase the formation rate of MoS 2 to 87.9%, which greatly improves the active site content of the catalyst. Furthermore, the dual modulation of MoS 2 and Al 2 O 3 by NiO modulated the surface alkalinity of the catalysts and promoted the formation of a large number of active edge sites in the MoS 2 /NiO-Al 2 O 3 catalysts, which in turn significantly improved the HDS performance of the catalysts. In addition, EPR characterization combined with experiments showed that the sulfur vacancies are the active sites for catalytic COS hydrodesulfurization over MoS 2 -based catalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shuai Nie,Jing Li,Yunxia He,Xitao Yin
Gas sensors with the p–n heterojunction have demonstrated distinct sensing responses to reducing gases, yet a clear understanding of the reaction pathways and selective adsorption mechanisms for specific gas components remains elusive, impeding practical applications. In this study, we constructed an atomic-level NiO–In 2 O 3 heterojunction and explored its adsorption behaviors and sensing properties for CO and H 2 by first-principles calculations. Analysis of its electronic properties, focusing on binding energy, differential charge density, and density of states, confirmed the creation of a highly stable NiO–In 2 O 3 heterojunction and alterations in the coordination environment of the surface-active atoms. These changes potentially led to differences in the affinity between the gas molecules and the adsorption sites. The calculations of the adsorption properties revealed that the adsorption capacity of H 2 is relatively weak compared to the strong interactions between CO and heterojunction surface atoms, indicating a readily variable reaction pathway for H 2 . Consequently, the adsorption configuration at the interface site on the NiO–In 2 O 3 heterojunction surface exhibited a predominantly p-type response for CO and a unique n-type response for H 2 . This interfacial effect of the heterojunction is crucial for the selective adsorption of CO and H 2 . Furthermore, the opposite response signal was verified by gas sensing tests, which also presented the superior stability of the NiO–In 2 O 3 sensor. The p–n heterojunction of the corresponding composites was effectively characterized. This research offers new insights into the selective adsorption mechanism, paving the way for the development of gas sensors.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Mou Yuhang,He Qing,He Ying,Meng Chenyao,Liu Hui,Li Liang
Supercapacitors as green energy storage devices are widely utilized in vehicle manufacturing, rail transportation, power systems, and other fields. In this study, petal-like NiO was synthesized via a one-step hydrothermal method, followed by the preparation of NiO@ZIF-67 composite electrode material at room temperature. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) tests demonstrated that the NiO in NiO@ZIF-67 possesses a porous petal-like structure, with ZIF-67 particles uniformly growing on NiO sheets. The effect of ZIF-67 content on the electrochemical performance of NiO was investigated, and results showed that NiO@ZIF-67/1, prepared with a mass ratio of NiO to Co(NO₃)₂·6 H₂O of 1:1, exhibits the optimal electrochemical performance. The specific capacitance of NiO@ZIF-67/1 electrode material reached 188.44 F·g⁻¹ at 1 A/g. Furthermore, the symmetric supercapacitor assembled with NiO@ZIF-67 exhibited a maximum energy density of 41.76 Wh/kg at 1.4 kW/h, with a capacitance retention rate of 87.2% after 5000 cycles. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Mengyin Liao,Chao Wang,Xuanhua Zhang,Chao Luan,Wenyuan Xu,Zhongyi He
Novel Pt/Co(OH)2-NiO/C catalysts based on carbon black were successfully synthesized using the hydrazine hydrate reduction method and galvanic replacement strategies. They were subsequently tested for their activity in the electrocatalytic oxidation of methanol. It was observed that the peak current density of Pt/Co(OH)2-NiO/C (8.29 A mg-1Pt) was 22.4 times higher than that of commercial Pt/C-JM (0.37 A mg-1Pt). The electrocatalytic activities and durabilities of the synchronously synthesized Pt/Co(OH)2-NiO/C catalysts were significantly better than those of PtCo/C, PtNi/C, and PtCoNi/C-X (X = 200, 400, 600) catalysts synthesized by calcination in Ar at different temperatures. The reason is that the highly dispersed Pt helps to expose more active sites on the catalyst surface, and the addition of Co(OH)2 and NiO alters the electron density of Pt, which reduces the adsorption of intermediate CO, attenuates the toxic effect, and enables more efficient oxidation of methanol.
✓ 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）