ACS Applied Energy Materials
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2024
·
IF 5.4
Xia Wei,Tianyao Wang,Hongbin Dai,Song Li
The hydrazine oxidation reaction (HzOR) is critical for direct hydrazine fuel cells and presents a promising alternative to the kinetics-sluggish oxygen evolution reaction in water splitting. Engineering catalysts with high-density nanotwin structures has emerged as a compelling strategy to enhance catalytic activity. However, such catalysts have to be explored for HzOR applications. This work reports the successful synthesis of a porous Ni–Zn catalyst featuring high-density coherent nanotwins (NT-Ni-Zn). NT-Ni-Zn supported on Ni foam exhibited exceptionally high catalytic activity and stability toward the HzOR, achieving a current density of 212.4 mA·cm–2 at 0.04 V vs reversible hydrogen electrode and retaining up to 93.9% after 15 h of continuous electrolysis. In addition, hydrazine-assisted water electrolysis using NT-Ni-Zn/Ni foam as both the cathode and anode require only a cell voltage of 70 mV to reach 10 mA cm–2. The exceptional HzOR activity of the Ni–Zn catalyst is attributed to the presence of the nanotwin structure, which promotes a favorable d-band center position and facilitates strong hydrazine binding on the twinned surface. This study provides valuable insights into the development of nanotwin catalysts for HzOR advancement.
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CRYSTAL GROWTH & DESIGN
·
2024
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IF 3.2
Huiqin Ma,Zhuxiang Mao,Wen Liu,Yahao Zhao,Peng Liu,Difu Zhan,Qian Fu,Yizhong Huang,Changcun Han
ZnIn2S4 (ZIS) is an N-type direct bandgap semiconductor material with a visible light response, which exhibits excellent photocatalytic water-splitting performance. To enhance ZIS-based photocatalysts, heterojunction construction and cocatalyst loading methods have been explored extensively. In this research, a Co9S8/ZnIn2S4 (CS/ZIS) heterojunction was successfully synthesized via a solvothermal method, and then Ni(OH)2 nanoparticles were successfully loaded on CS/ZIS by photodeposition, yielding the Ni(OH)2/CS/ZIS photocatalyst. Our findings reveal tight coupling of ZIS nanosheets with the CS surface, establishing an effectively constructed heterojunction structure that enhances interface charge transfer and light absorption. The synergistic effect of CS and Ni(OH)2 significantly boosts the photocatalytic hydrogen production of ZIS composites. The optimum hydrogen production rate of CS/ZIS is 10.06 mmol·h–1·g–1 and that of Ni(OH)2/CS/ZIS reaches 12.92 mmol·h–1·g–1, a 11.9-fold increase over pure ZIS, with exceptional light stability. Furthermore, we discuss the photocatalytic reaction mechanism based on the experimental and characterization results. This work presents a novel approach to designing highly efficient photocatalysts using ZnIn2S4, aimed at enhancing the conversion of solar energy into chemical energy.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Yajing Hu,Yong Men,Shuyi Xu,Yuanfen Feng,Jinguo Wang,Kaijie Liu,Yibo Zhang
Constructing the interface of Ni/Y 2 O 3 heterogeneous catalyst is a feasible strategy for efficient catalyst design in CO 2 methanation, which can create the active Y–O–Ni interfacial sites by utilizing the interaction between Ni and Y 2 O 3 . In this work, the strategy of using different nickel precursors (nickel nitrate, nickel acetate, basic nickel carbonate and nickel citrate) was used to prepare various Ni-based catalysts supported on Y 2 O 3 , which were estimated for their catalytic performance on CO 2 methanation. The catalysts were characterized based on BET, XRD, TEM, H 2 -TPR, XPS and CO 2 -TPD, etc. The results indicated a close correlation between the metal dispersion and particle size of Ni/Y 2 O 3 catalysts and the nickel precursor employed. The Y–O–Ni interface structure in Ni/Y 2 O 3 catalysts, associated with basic sites, provides a richer source of basic sites, offering more active sites for CO 2 adsorption and activation. Ni/Y 2 O 3 catalyst prepared with nickel nitrate as the precursor exhibited characteristics such as a highly enhanced nickel dispersion, a smaller nickel particle size, and more abundant metallic Ni 0 sites. Moreover, nickel nitrate-derived Ni/Y 2 O 3 catalyst exhibited optimal catalytic activity, achieving a CO 2 conversion rate of up to 92 % at 300 °C, with 100 % selectivity to CH 4 , and displaying good stability over 30 h. Therefore, the dispersion of Ni and the size of Ni particles could be controlled by adjusting the precursor, which is closely associated with the catalytic activity of Ni/Y 2 O 3 catalyst. This work unveils the interface-property relationship of Ni/Y 2 O 3 catalysts and provides a new insight into strategy of constructing more effective Ni-based catalyst for CO 2 methanation through the controlled nickel precursor.
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Materials Today Communications
·
2024
·
IF 3.7
Yu-Qing Zhang,Fu-Kai Yang,Yan-Wei Li,Bing-Tao Gong,Wei-Li Qu,Chao Deng,Zhen-Bo Wang
Designing and synthesizing low-cost, high-performance electrocatalysts remains an important challenge for the commercialization of liquid fuel cells. Herein, a novel PdSnNi hexagonal nanoplates (PdSnNi NPs) alloy catalyst synthesized by a simple wet chemical method is reported for catalyzing formic acid oxidation, which greatly outperforms binary PdSn NPs and Pd/C catalysts, thanks to the synergistic effect of Pd, Sn, and Ni. With the assistance of octadecene and olamine system, a small-size hexagonal nanoplate morphology with high specific surface area was prepared. The electrochemical active area of PdSnNi NPs/C catalyst reaches 124.6 m 2 g −1 Pd , which is 9.5 times that of Pd/C catalyst. The mass activity of PdSnNi NPs/C reaches 2275.4 mA mg −1 Pd , which is 1.3 and 4.5 times that of PdSn NPs/C and Pd/C. Moreover, the stability of PdSnNi NPs/C catalyst is also greatly improved compared with PdSn NPs/C and Pd/C catalysts. It is worth noting that the PdSnNi NPs catalyst reduces the use of precious metal Pd, and the content of metal Pd only accounts for 46.42 % of the total content of metal, which effectively reduces the cost of the catalyst. The research results show that the introduction of Sn and Ni regulates the electronic structure of Pd, increases the active sites of the catalyst, and accelerates charge transfer rate, which lead to a significant improvement in the performance of the catalyst. In summary, this work proposes a novel and efficient Pd-based alloy catalyst for formic acid electrooxidation reaction.
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CERAMICS INTERNATIONAL
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2024
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IF 5.1
Dashuang Fu,Fang He,Haiyi Tian,Jiahao Li,Jieming Zhang,Zheng Kang,Yunkai Wu,Xu Wang
The development of lead-free dielectric capacitors with high recoverable energy storage density and high energy storage efficiency is important for improving the overall performance of electronic and power systems. BaTiO 3 (BTO) is one of the most common ferroelectric materials and has attracted much attention for energy storage applications in the past decades due to its excellent dielectric and ferroelectric properties. However, high remnant polarization and low electrical breakdown strength of BTO limit its development in energy storage applications. Many efforts (e.g., elements doping, interface/heterostructure, etc.) have been made to improve the energy storage density of BTO thin films. In this paper, Ba 1-x Ni x TiO 3 thin films (x = 0, 0.02, 0.04, 0.06, 0.08; abbreviated as BN x T) were synthesized via sol-gel and spin-coated method. The effect of Ni doping on the structural, dielectric, ferroelectric and energy storage properties of BTO thin films has been studied. The results confirmed that with the increase of Ni doping, a second phase arises and the dielectric constant decreases. While appropriate Ni doping led to the improvement of the breakdown strength, further increase of Ni deteriorated the energy storage because of the high oxygen vacancy. Finally, optimized energy storage performance was obtained for BN 0.04 T thin film: dielectric constant of 401, dielectric loss of 0.002, recoverable energy density of 20.2 J/cm 3 and energy storage efficiency of 83.6% at 965 kV/cm. Meanwhile, the remnant and maximum polarization of the films were 0.06 μC/cm 2 and 50 μC/cm 2 , respectively. BN 0.04 T thin film has an excellent application prospect and is expected to appear as a component in the future composite energy storage film system.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Xue Zhang,Chunxia Wu,Ye Bu,Ying Liang,Zhitong Wang,Jing Li,Daoxiong Wu,Xinlong Tian,Peilin Deng
Exploring efficient and durable methanol oxidation reaction (MOR) electrocatalysts is crucial for the industrialization of direct methanol fuel cells. Herein, we designed MOR electrocatalyst of PtRu/Ni-N-C, in which PtRu nanoclusters (PtRu NCs) are loading on nitrogen-doping carbon support anchoring Ni single atoms (Ni-N-C). Compared with PtRu NCs and Pt/C, PtRu/Ni-N-C exhibits more excellent MOR activity with 2050 mA mg pt -1 and tougher anti-CO toxicity over 6000 s CA test, proving that the synergetic effect of nanoclusters and single atoms support enhance MOR activity and resistance to anti-CO toxicity. The fine spectroscopy analysis and density functional theory (DFT) calculations demonstrate that the strong metal-support interaction (SMSI) between nanoclusters and single atoms, facilitating the electron transfer of about 0.4 e from PtRu NCs to the Ni-N-C support, effectively reduces the d -band center of Pt to weaken the adsorption capacity of *CO and *COOH intermediates. Moreover, the synergistic sites derived PtRu NCs coupling Ni single atoms accelerate *OH adsorption, promoting the adjacent *CO removal. This work offers deep insight into the SMSI effect between nanoclusters and single atoms support to design the efficient Pt-based MOR electrocatalysts.
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KINETICS AND CATALYSIS
·
2018
·Vol. 58
·期 6
·800-808
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IF 0.926
Tang Chengli,Liping Lv,Zhang Limei,Tan Luxi,Dong Lichun
Ni@CeO 2 core–shell catalysts were synthesized via a facile surfactant-assisted hydrothermal method and their catalytic performance in the dry reforming of methane (DRM) reaction was evaluated. A variety of techniques including XRD, N 2 adsorption–desorption, SEM, TEM, TPO, TGA were employed to characterize the prepared or spent catalysts. The encapsulation by the CeO 2 shell, on one side, can restrict the sintering and growth of Ni nanoparticles under harsh reaction conditions. On the other side, compared to the conventional shell material of SiO 2 , CeO 2 can provide more lattice oxygens and vacancies, which is helpful to suppress coke deposition. Consequently, the Ni@CeO 2 core–shell catalysts exhibited better catalytic activity and stability in the DRM reaction with respect to the referenced Ni@SiO 2 core–shell catalysts and Ni/CeO 2 supported catalysts.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
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IF 1.6
Wu Xujia,Zhao Xinyu,Chen Lijie,Sun Jing,Dai Zhongran
Herein, a novel composite cathode material of Ni foam supported by amidoxime cellulose microspheres (ACM@Ni) has been prepared. The removal rate of U(VI) can reach 95% within 4 h under the conditions of 298.15 K, pH = 4 and 1.2 V, which was 5 times faster than the physical adsorption. The adsorption data of U(VI) were consistent with the quasi-first-order kinetic and Freundlich isotherm model, revealing the multilayer chemisorption process of uranium on the ACM-5@Ni cathode. In addition, ACM-5@Ni electrode materials also have potential application prospects in the actual treatment of uranium containing wastewater. XRD and XPS studies show that the U(VI) adsorbed by ACM-5@Ni cathode was reduced to U(IV) in the process of uranium removal.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Huibin Liu,Xiao Chen,Shiyao Liu,Yan Du,Wenjun Zhu,Zhengwen Hu,Marc Armbrüster,Changhai Liang
Using the low-temperature molten salt strategy, Al–Ni intermetallic compound catalysts (AlNi, Al3Ni2, and AlNi3) with efficiently separated nickel sites are successfully prepared by reducing the oxides of stoichiometric mixtures of the corresponding elements. Applying these materials as catalysts in the semihydrogenation of phenylacetylene to styrene suggests that the AlNi3-derived catalyst exhibits superior catalytic performance, achieving a remarkable styrene selectivity of 88% at a high conversion of phenylacetylene (99%). In conjunction with reaction kinetics, in situ infrared (IR) measurements, and density functional theory (DFT) calculations, the electron-rich Ni active center, created through electron transfer from Al atoms, plays a pivotal role in reducing the surface adsorption energy of styrene and thus enhancing the semihydrogenation selectivity. In addition, the magnetic AlNi3-derived catalysts exhibit excellent stability and can be easily separated by using a magnet.
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Chem
·
2024
·
IF 19.1
Yaolin Wang,Jiaqiang Yang,Yuhai Sun,Daiqi Ye,Bin Shan,Shik Chi Edman Tsang,Xin Tu
Plasma catalysis offers a flexible and decentralized solution for CO 2 hydrogenation to methanol under ambient conditions, avoiding the high temperatures and pressures required for thermal catalysis. However, the reaction mechanism, particularly plasma-assisted surface reactions, remains unclear, limiting the development of efficient catalysts for selective methanol synthesis. Here, we report a bimetallic Ni-Co catalyst effective in plasma-catalytic CO 2 hydrogenation to methanol at 35°C and 0.1 MPa, achieving 46% methanol selectivity and 24% CO 2 conversion. In situ plasma-coupled Fourier transform infrared characterization, along with density functional theory calculations, reveals that the engineered bimetallic sites act as primary active centers for methanol synthesis, promoting the rate-determining step in H-radical-induced reaction pathways by reducing steric hindrance effects. This work demonstrates the significant potential of bimetallic catalysts in plasma-catalytic CO 2 hydrogenation to methanol under ambient conditions, representing a major step toward sustainable CO 2 conversion and fuel production.
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MOLECULES
·
2024
·Vol. 29
·期 15
·3633
·
IF 4.2
Shihao You,Jing Di,Tao Zhang,Yufeng Chen,Ruiqin Yang,Yesong Gao,Yin Li,Xikun Gai
To explore advanced oxidation catalysts, peroxymonosulfate (PMS) activation by Co-Ni-Mo/carbon nanotube (CNT) composite catalysts was investigated. A compound of NiCo2S4, MoS2, and CNTs was successfully prepared using a simple one-pot hydrothermal method. The results revealed that the activation of PMS by Co-Ni-Mo/CNT yielded an exceptional Rhodamine B decolorization efficiency of 99% within 20 min for the Rhodamine B solution. The degradation rate of Co-Ni-Mo/CNT was 4.5 times higher than that of Ni-Mo/CNT or Co-Mo/CNT, and 1.9 times as much than that of Co-Ni/CNT. Additionally, radical quenching experiments revealed that the principal active groups were1O2, surface-bound SO4•−, and •OH radicals. Furthermore, the catalyst exhibited low metal ion leaching and favorable stability. Mechanism studies revealed that Mo4+on the surface of MoS2participated in the oxidation of PMS and the transformation of Co3+/Co2+and Ni3+/Ni2+. The synergism between MoS2and NiCo2S4reduces the charge transfer resistance between the catalyst and solution interface, thus accelerating the reaction rate. Interconnected structures composed of metal sulfides and CNTs can also enhance the electron transfer process and afford sufficient active reaction sites. Our work provides a further understanding of the design of multi-metal sulfides for wastewater treatment.
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COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Qixiong Zhang,Yafei Hou,Qi Yang,Jing Cuan,Weiping Li
High energy storage in multilayer composites is pivotal for the progress of advanced electronic and power device systems, however, the uneven distribution of electric fields caused by significant dielectric contrast between adjacent layers limits its potential gaining in energy density. Through incorporating transition layers into multilayer composites to mitigate interlayer dielectric contrast, herein, four-layer matrix gradient-structured composites ( x vol% PMMA/(100- x ) vol% P(VDF-HFP) have been designed and fabricated. The results demonstrate that the transition layers play a crucial role in hindering the breakdown process and homogenizing the electric field distribution. In addition, the linear PMMA as well as horizontally oriented nanoplates are also beneficial in enhancing their energy storage performances. The gradient-structured composite ultimately achieved an energy density of 24.3 J/cm³ and a charge-discharge efficiency of 86.6 % at 676.8 MV/m, significantly surpassing that of traditional multilayer nanocomposites. The strategies proposed here may represent a universal approach to further enhance energy storage performances of multilayer composites.
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