Reaction Kinetics Mechanisms and Catalysis
·
2026
·
IF 2.1
Hu Yanan,Yang Dawei,Li Qiaoling,Yu Chengcheng
Herein, a Cr-doped Ni-Cu/(NiOH) 2 coating supported on nickel foam (Ni-Cu-Cr/NF) was fabricated via a facile one-step electrodeposition strategy and employed as an efficient electrocatalyst for the hydrogen evolution reaction (HER) in alkaline media. In 1 M NaOH, Ni–Cu–Cr/NF requires an overpotential of 30 mV to reach a current density of − 10 mA cm⁻ 2 and exhibits a Tafel slope of 55 mV dec⁻ 1 . These electrochemical results are associated with the combined effects of the multicomponent composition and an increased electrochemically active surface area (ECSA). The ECSA of Ni–Cu–Cr/NF is approximately 23.6 times that of Ni–Cu/NF. In addition, the catalyst maintains stable operation for 60 h during continuous electrolysis. This work presents a simple preparation method for the novel Ni-Cu-Cr/NF catalyst and systematically investigates the impact of Cr doping on enhancing catalytic performance, providing an effective strategy for the development of nickel-based alloy electrocatalysts. Graphical
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Yanqing Fu,Dongdong Zhang,Pan Li,Yi Han,Juan You,Qiliang Wei,Weiyou Yang
The development of efficient non-precious metal electrocatalysts is essential for oxygen evolution reaction (OER) for water splitting. Among them, amorphous bimetallic NiFe-based compounds are recognized as one of the excellent candidates for efficient OER. Herein, the Ni-Fe-Se film is rationally designed via facile one-step electrodeposition with tailored active sites and thicknesses. Accordingly, the optimized sample, with an increased Fe-incorporation level and a thickness of ∼50 nm, shows a low overpotential of ∼290 mV at a current density of 40 mA cm −2 and long-term durability in 1 M KOH solution, representing its overall excellent OER performance. Furthermore, operando Raman and ex-situ XPS are used to identify the active sites for OER. This work provides some new insights into exploring earth-abundant free-standing catalysts for OER toward overall water-splitting applications.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Meng Wang,Panpan Zhou,Tong Feng,Zhi Song,Qingguo Ren,Huidong Gu,Xueqing Shi,Qitu Zhang,Lixi Wang
Benefiting from its large specific surface area, abundant defects and functional groups, two-dimensional (2D) laminated Ti 3 C 2 T x MXene is a kind of electromagnetic wave (EMW) absorber with great potential. However, the impedance mismatch caused by the excessive conductivity, inappropriate permittivity and lack of magnetic loss seriously hinders the application of MXene to EMW absorption. Herein, multidimensional hierarchical Ni/TiO 2 /C nanocomposites composed of three-dimensional (3D) hydrangea-like Ni/C microspheres and well-arranged 2D carbon sheets embedded with TiO 2 nanoparticles were successfully fabricated from a Ni-based trimellitic acid framework (Ni-BTC) and Ti 3 C 2 T x MXene via facile in-situ solvothermal assembly and annealing processes. As expected, excellent EMW absorption properties were obtained only by changing the annealing temperature. The minimum reflection loss ( RL min ) value of -45.6 dB and the effective absorption bandwidth (EAB) of 3.40 GHz (14.6–18.0 GHz) with a layer thickness of only 1.5 mm is obtained by annealing the sample at 700 °C. The outstanding ternary multilayer structure and the optimization of magnetoelectric synergy in impedance matching jointly create its remarkable EMW absorption performance. This work is expected to provide a simple and effective method to design MXene-based EMW absorbing materials possessing high absorption intensity, light weight, wide EAB and thin thickness.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 16
·10169-10179
·
IF 12.732
Fuzhen Zhao,Huicong Liu,Houyu Zhu,Xiaoyu Jiang,Liqun Zhu,Weiping Li,Haining Chen
Amorphous/amorphous heterostructures with a large surface area are theoretically anticipated to promote the alkaline hydrogen evolution reaction (HER) activity and stability. However, the growth, characterization and theoretical simulation of amorphous/amorphous nanostructured heterostructures are still challenging due to their atomic isotropy. Herein, a novel and simple strategy is developed to synthesize amorphous/amorphous Ni–P/Ni(OH)2 heterostructure nanotubes by immersing Zn@Ni–P nanowires grown by axial screw dislocation in alkaline solution. When used as an HER catalyst, the Ni–P/Ni(OH)2 nanotubes achieve considerably high electrocatalytic activity and decent stability. The significantly low overpotential of 54.7 mV at a current density of 10 mA cm−2 is among the best values reported for transition metal phosphides in alkaline solution. Density functional theory calculations indicate that the abundant defect structures of amorphous Ni–P would shift the Ni 3d band center toward the Fermi level, demonstrating an energy barrier decrease for H2 generation. Furthermore, the synergistic effect of amorphous Ni–P and Ni(OH)2 could significantly enhance H2O dissociation to supply sufficient protons for the HER.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 6
·066515
·
IF 3.721
Wenjing Liu,Zhiyuan Wu,Pei Dong,Feifei Lin,Meng Zang,Shuai Qiao,Yingying Gu,Jinqiang Zhang,Shuaijun Wang,Chaocheng Zhao
Developing effective and economical materials for emerging electrochemical remediation of persistent organic pollutants has attracted significant research interest. In this study, a heteromorphic self-standing nickel foam@Ni(OH)2/MnO2 (NF@Ni(OH)2/MnO2) electrode was synthesized by a simple solvothermal method and employed for the remediation of persistent organic pollutants. The prepared NF@Ni(OH)2/MnO2 electrode exhibited better performance for the electro-catalytic degradation of tetracycline (TC) than that of the NF and NF@Ni(OH)2. In optimized conditions, the NF@Ni(OH)2/MnO2 electrode exhibited the highest TC degradation efficiency (90%) and total organic carbon(TOC) removal (59.02%) among the prepared electrodes. In addition, a higher mineralization current efficiency (MCE) and lower energy consumption (EC) for the NF@Ni(OH)2/MnO2 electrode was achieved. The enhancement occurs primarily because the active MnO2 anchored to the porous and highly conductive Ni foam substrate surface boosts the electron transfer and the generation of hydroxyl radicals, as proved by a free radical trapping experiment and fluorescence spectrum analysis. This study suggests the possibility of a new paradigm in designing effective and practical electro-Fenton electrodes for environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 19
·9228-9235
·
IF 9.931
Teng Wang,Rumei Jin,Xiuqi Wu,Jie Zheng,Xingguo Li,Kostya Ostrikov
A highly efficient Ni–Mo bimetallic catalyst for the hydrogen evolution reaction can be obtained from a molybdate incorporated Ni-MOF by thermal decomposition in NH3. The catalyst is composed of crystalline Ni nanoparticles doped with amorphous low valence Mo oxide encapsulated in thin N-doped carbon layers, showing excellent HER performance, featuring a very low overpotential for the HER (η20 = 58 mV), low Tafel slope (57 mV dec−1) and excellent long term stability. The catalyst apparently outperforms N-doped carbon encapsulated Ni catalysts without Mo doping, emphasizing the critical synergetic effect of Mo doping and the surface N-doped carbon thin layer on promoting the performance of Ni based HER catalysts.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2016
·
IF 4.569
Xiaojuan Chen,Guangfeng Zeng,Taotao Gao,Zhaoyu Jin,Yajie Zhang,Hongyan Yuan,Dan Xiao
Electrochemical water splitting in an alkaline electrolyte for large-scale hydrogen production is currently a hot research topic. However, developing high-performance and durable oxygen-evolving electrocatalysts is an ongoing challenge. In this work we prepared Ni-phytate thin films with a bubble-like structure on Ni-foam through an in situ growth process. The resulting material can be used as an oxygen-evolving electrode in basic media without requiring the use of a conductive binder. The Ni-phytate electrode has high catalytic activity ( η j = 10 mA cm − 2 = 280 mV) and good stability (the current activity remained 95% after 5 h) towards OER. This is an effective approach to simplifying the large-scale preparation of catalysts for water-splitting applications.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Yi Zhang,Hao Wang,Man Li,Xinhao Sun,Yan Zhang,Zhifeng Wang,Chunling Qin
This work successfully synthesizes a new type of multi-layered flexible hybrid electrode (Cu/Ni(OH) 2 /np-Ni) composing of bimetallic components, hierarchical porous structure and outstanding glucose electrocatalytic performance. The synthesis strategy includes a facile two-step approach, i.e. the Ni(OH) 2 nanolayer in-situ grows on a nanoporous Ni (np-Ni) network (Ni(OH) 2 /np-Ni) via deionized water immersion and then the metallic Cu dendrites are uniformly deposited on Ni(OH) 2 /np-Ni. Moreover, due to the hierarchical porous structure as well as synergetic effect of Ni(OH) 2 and Cu dual electroactive components, the Cu/Ni(OH) 2 /np-Ni hybrid electrode electrodeposited with 1 min delivers wider linear range of 18 mM and higher sensitivity of 1.629 mA mM −1 cm −2 . The electrode possesses excellent interference immunity, reproducibility as well as long-time stability. In addition, the mechanism of electrochemical sensors for detecting glucose under alkaline conditions is briefly introduced. Accordingly, the flexible Cu/Ni(OH) 2 /np-Ni electrode material shows promise for further development as a contender for wearable glucose sensors.
✓ 已验证
产品关联
DOI
高影响因子
Green Energy & Environment
·
2024
·
IF 10.7
Junming Zeng,Yongbin Yao,Fang Wang,Jiajian Gao,Lili Zhang,Guangwen Xu,Ziyi Zhong,Fabing Su
Nickle-based catalysts are commonly used for CO 2 methanation. However, there is still potential to improve their catalytic performance under mild conditions. In this study, we synthesized a series of Ru-Ni-Al catalysts from Ru-doped NiAl-hydrotalcite using a hydrothermal method. The Ru-Ni-Al catalyst demonstrated much higher activity for CO 2 methanation than the Ni-Al catalyst that did not have Ru doping. Both experimental results and theoretical calculations indicate that the enhanced performance of the Ru-Ni-Al catalyst is related to electronic interactions between nickel (Ni) and ruthenium (Ru). The Ru sites transfer electrons to the Ni sites, increasing the local electron density of Ni, which enhances the adsorption and activation of H 2 . Furthermore, the Ru-Ni metal interface sites improve the adsorption and activation of CO 2 . In situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) analysis indicates that adjusting the electronic structure of Ni sites can accelerate the production of intermediates HCOO*, while Ru-Ni intermetallic interface sites can directly dissociate CO 2 into CO*. In addition, CO 2 methanation on the Ru-Ni-Al catalyst follows HCOO*- and CO*-mediated pathways. This study underscores the potential for enhancing CO 2 methanation performance by modulating the electronic structure of Ni sites.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 33
·26950-26958
·
IF 4.6
Chunqiu Zhao,Qiang Chang,Fu Yin,Jing Li,Guowei Niu,Hulin Wang,Dan Liu,Bhekie B. Mamba,Chenghua Zhang,Alex T. Kuvarega
One-step CO hydrogenation to value-added chemicals represents a prominent yet challenging research objective for conventional catalysis processes in chemical industry. Herein, we report a rationally designed Ni-doped Zn-NC catalyst embedded within an N-doped carbon matrix for one-step CO hydrogenation to dimethyl ether (DME), demonstrating superior CO conversion compared to the pristine Zn-NC catalyst (25.9% vs. 20.6%) while both maintaining high DME selectivity (>93%). Structural characterization revealed that Ni atoms existed in a bimetallic coordination environment, which is crucial for the promoting effect of Ni. In contrast, Ni nanoparticles incorporated into Zn-NC (nanoNi–Zn-NC) reduced CO conversion to less than 17% despite retaining high DME selectivity (>92%). Besides, control catalysts containing either Ni-only or Ni/Zn nanoparticles supported on carbon support exhibited limited catalytic activity and mainly produced hydrocarbons. This work provides valuable insights into the active sites of the bimetallic Ni–Zn-NC catalysts and elucidate the structural effects of bimetallic systems for CO conversion to DME. Furthermore, this study offers a feasible framework for optimizing Zn-based bimetallic catalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Muhammad Tahir Khalil,Yanyan Liu,Pengxiang Zhang,Huanhuan Zhang,Ruofan Shen,Xianji Guo,Xianli Wu,Baojun Li
Transition metal phosphides are increasingly recognized for their durability and resistance to corrosion in catalytic processes. Ni-based phosphide catalyst (Ni-NiP-NC@NF) was synthesized, and experimental results verified the consistent formation of Ni–NiP nanoparticles (NPs) exhibiting a nano-brick-like structure. These Ni–NiP NPs, with an average diameter of 2.5 nm, demonstrated strong electronic interactions between the nickel sites and the incorporated phosphorus (P). The synergistic interaction raises the number of active sites (NiP) and enhances the electronic properties of the metallic nickel (Ni) sites. The optimized catalyst (Ni-NiP-NC@NF) showed remarkable catalytic performance in the hydrolysis of ammonia borane, achieving a hydrogen evolution rate ( r B ) of 1298 mL min −1 g −1 Ni, a turnover frequency (TOF) of 30.5 min −1 , and an apparent activation energy ( E a ) of 36.05 kJ mol −1 . This work provides a promising methodology for the development of transition metal phosphide catalysts aimed at industrial applications in heterogeneous catalysis and sustainable energy technologies.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 5
·1-17
·
IF 2.8
Wang Jianqi,Wang Yang,Chen Zhou,Wang Changyang,Yang Jilong,Yang Jian,Gu Jian,Li Quan
Silicon carbide (SiC) presents significant application prospects in the light of wave-absorbing, attributed to its excellent electrical and physicochemical properties. By utilizing the synergistic loss mechanism, SiC compounding with the magnetic can markedly enhance the absorption efficiency of electromagnetic wave (EMW) which is an important technical mean to optimize the wave-absorbing capabilities. In this paper, polycarbosilane (PCS) was used as a precursor to prepare (SiC) p and Ni@SiC composites were successfully synthesized by chemical plating without palladium activation, in order to explore the lightweight SiC-based wave-absorbing material that exhibits intense absorption and wide bandwidth. It is shown that when the (SiC) p is about 60 μm, the A2-Ni@SiC demonstrates the minimum reflection loss (RL min ) of −50.27 dB at 8.04 GHz with an effective absorption bandwidth (EAB) of 5.64 GHz at 3.0 mm (from 7.24 to 12.88 GHz). When the particle size of (SiC) p is further refined to about 5 μm, the prepared B2-Ni@SiC shows exceptional wave-absorbing performance achieving the RL min of −66.10 dB at 3.4 mm, along with an EAB of 4.44 GHz (from 5.56 to 10.0 GHz). The enhancement in wave-absorbing is likely due to the increased interfacial polarization at the Ni-(SiC) p interface, as well as the improved matching of the hybridized constituents.
✓ 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）