ACS Applied Materials & Interfaces
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2022
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IF 10.383
Chen Chen,Huawen Huang,Renzong Hu,Ran Bi,Lei Zhang
Magnesium-ion batteries (MIBs) have aroused widespread interest in large-scale applications due to their low cost, high volumetric capacity, and safety. However, magnesium (Mg) metals are incompatible with conventional electrolytes, making it difficult to plate and strip reversibly. Therefore, developing novel Mg2+ host anodes remains a huge challenge. Herein, we present a rational design and fabrication of binary Bi@Sn alloy nanoparticles embedded in carbon sheets (Bi@Sn–C) as a superior anode for MIBs employing phase separation during the annealing of bimetallic MOFs. The Bi@Sn–C simultaneously integrates the nanostructure design and multi-element coordination strategies which is favorable to improve the overall structural stability and Mg2+ diffusion kinetics. Benefiting from the aforementioned features, the Bi@Sn–C electrodes deliver good cycling stability of 214 mA h g–1 at 100 mA g–1 after 100 cycles and rate capability with 200 mA h g–1 at 500 mA g–1. And when using all-phenyl complex with lithium chloride (LiCl–APC) dual-salt electrolyte, the electrochemical performance of Bi@Sn–C is further optimized and shows enhanced rate performance (238 mA h g–1 at 500 mA g–1) and reversible capacity (308 mA h g–1 at 100 mA g–1 after 100 cycles). This novel strategy holds great promise for designing efficient alloy electrode materials for MIBs.
研究领域:
材料科学
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能源存储
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PubMed
高影响因子
Inorganic Chemistry Frontiers
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2019
·Vol. 6
·期 6
·1546-1552
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IF 5.934
Qilu Yao,Meng He,Xiaoling Hong,Xiaoliang Zhang,Zhang-Hui Lu
Hydrogen has been considered as an important alternative energy source for both environmental and economic reasons. The development of highly efficient and selective catalysts for hydrogen evolution from chemical hydrogen storage materials (e.g. hydrous hydrazine, N2H4·H2O) has become one of the most active research areas. In this study, MoOx-doped NiPt nanoparticles (NPs) have been successfully prepared via a simple one-step co-reduction strategy at room temperature. The characterization results show that the surfactant/support-free NiPt–MoOx NPs with a mean particle size of 5.0 nm are well-dispersed and in a low-crystalline/amorphous state. It is found that the prepared NiPt–MoOx samples show much higher catalytic activity toward the decomposition of N2H4 as compared to that of NiPt without the introduction of MoOx. In addition, among all the NiPt–MoOx NPs, the optimized Ni0.6Pt0.4–MoOx nanocatalyst shows 100% H2 selectivity and the best catalytic performance for the decomposition of N2H4 under alkaline conditions at 323 K. The TOF value of Ni0.6Pt0.4–MoOx NPs is found to be 822 h−1, which is among the highest values ever report for the same reaction. The excellent catalytic activities could be attributed to the modified electronic structure and the small particle size of NiPt NPs induced by the MoOx dopant. Other MoOx-doped Ni-based (NiM, M = Rh, Ir, Au, Ag and Ru) bimetallic catalysts also showed excellent catalytic activity. The present highly efficient and selective catalyst system may encourage the practical application of N2H4·H2O as a potential chemical hydrogen storage material.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Zhen He,Qiaohui Duan,Chengming Wang,Lingwen Liao
A highly active surface can endow the electrocatalysts with extraordinary catalytic performances. However, it remains challenging to tailor the atomic packing characteristics and thus the physical and chemical characteristics of the electrocatalysts . Herein, penta-twinned Pd nanowires (NWs) with abundant high-energy atomic steps (i.e., stepped Pd) are synthesized by seeded synthesis on Pd NWs enclosed by (1 0 0) facets. Benefiting from the catalytically active atomic steps, such as [ n (1 0 0) × m (1 1 1)] on the surface, the resultant stepped Pd NWs can work as an effective electrocatalyst for the ethanol oxidation reaction (EOR) and ethylene glycol oxidation reaction (EGOR), which are essential anode reactions in direct alcohol fuel cells (DAFCs). Compared with commercial Pd/C, the Pd nanowires bound by (1 0 0) facets and atomic steps both display enhanced catalytic activity and stability towards the EOR and EGOR. Importantly, the mass activities of the stepped Pd NWs toward the EOR and EGOR are 6.38 and 7.98 A mg Pd −1 , which are 3.1 and 2.6 times those of Pd NWs enclosed by (1 0 0) facets, respectively. Besides, our synthetic strategy also enables the formation of bimetallic Pd-Cu nanowires with abundant atomic steps. This work not only demonstrates a simple yet effective strategy to obtain mono- or bi-metallic nanowires with abundant atomic steps, but also highlights the significant role of atomic steps for boosting the activity of electrocatalysts.
研究领域:
材料科学
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电化学
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PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
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2020
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IF 3.784
Fan Zhang,Zhengjun Yao,Oleksandr Moliar,Zelei Zhang,Xuewei Tao
Using the principle of electrochemical additive manufacturing (ECAM), a nanocrystalline Ni Co binary alloy coating was prepared on the surface of the steel substrate. This study shows the pulse-shaped current-time curve of ECAM during the coating preparation process, and the nanocrystalline Ni Co coating has a regular multilayer structure. At the same time, the ECAM method can effectively limit the growth time of the crystal nucleus and prepare nanocrystalline Ni Co alloy coatings with ultra-low energy consumption (5.75 × 10 −3 W). Besides, as the content of Co in the coating increases, the Ni Co alloy coating changes from an FCC single-phase structure to an FCC + HCP multi-phase structure. Finally, through the performance test of the nanocrystalline Ni Co coating, it is concluded that as the content of Co in the coating increases, the hardness of the coating increases, and the coating surface has a certain degree of hydrophobicity (100°–114°). The electrochemical corrosion test shows that the Ni Co coating has better corrosion resistance than the steel substrate. As the content of Co in the coating increases, the corrosion current density of the Ni Co coating increases from 9 μA/cm 2 to 32 μA/cm 2 .
研究领域:
材料科学
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电化学
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表面工程
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高影响因子
Science Bulletin
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2025
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IF 21.1
Qing Zeng,Mengyuan Ma,Hui Liu,Lin Xu,Shaonan Tian,Dong Chen,Jing Wang,Jun Yang
Atomic surface engineering for nanostructures significantly contributes to the enhancement of electrocatalysis for a given chemical reaction. However, exploring a facile method to elaborately regulate surfaces at atomic scale remains a grand challenge. Herein, we report the construction of atomically rough surfaces (ARSs) on Au-based binary alloys through a novel and controllable gold (Au)-catalyzed strategy, which involves the first synthesis of Au-based bimetallic nanoalloys, i.e., AuPd and AuAg, and subsequent reduction of another metal ions (Pt, Pd, or Ag) initiated by Au sites on the alloy particle surfaces. By combining ARSs with low-coordinated atoms with ligand effect induced by vicinal Au atoms, the as-prepared ARSs exhibit good activity and durability toward ethanol oxidation reaction (EOR) in an alkaline medium. In particular, the Pd-Pt ARSs on the AuPd alloy particle surface (denoted as AuPd-Pt) exhibit the highest electrocatalytic EOR performance in terms of both specific activity (14.9 mA cm –2 ) and mass activity (28.5 A mg –1 ), surpassing those of their AuPd alloy counterparts, commercial Pd/C catalyst, and most Pd-based electrocatalysts reported recently. In situ Fourier transform infrared (FTIR) spectroscopy reveals that the EOR process on the Pd-Pt ARSs strongly prefers incomplete oxidation, which is further authenticated by the density functional theory (DFT) calculations.
研究领域:
材料科学
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电化学
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Lin Huang,Maoqing Chen,Ying Yang,Qingshou Zheng,Li Gu,Ruobing Cheng,Xuebo Cao
Electro-reforming of organics such as alcohols into commodity chemicals and H 2 powered by renewables is intriguing and prevailing with the remarkable renaissance of electrochemical technology. Integrating Pt/Pd with an auxiliary metal, metal oxide, and metal hydroxide are feasible strategies to design the desirable catalysts toward alcohols electro-oxidation reactions. These catalysts however have high affinity toward carbonyl intermediates that occupy and poison the active sites. Thus, the target products suffer from poor selectivity. To address these issues, a facile binary Pt–Ag alloy nanowires (NWs) catalytic system was reported for efficient electro-oxidative reforming of ethylene glycol (EG), yielding glycolate with a selectivity of 91.5 %, an EG conversion of 96.4 %, and Faradaic efficiency (FE) of 87.4 %. Experimental and theoretical investigations revealed that Ag-induced electronic structure perturbations in Pt 0.66 Ag catalyst boosted the kinetics and robustness as a conventional promoter toward EG electro-oxidation reaction (EGOR). Moreover, the one-electron oxidation of water/hydroxide ion to generate abundant hydroxyl adspecies (OH ad ) on Ag served as another crucial promoter for efficient dehydrogenation, glycolate formation, and carbonyl intermediates release via a highly efficient, noncompetitive Langmuir–Hinshelwood (L–H) mechanism, but not the competitive L–H mechanism or the Eley–Rideal (E–R) mechanism. These findings provide new insights into the selective alcohol electro-oxidation reaction, and facilitate the generation of commodity chemicals via partial electro-oxidation reactions.
研究领域:
电化学
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催化材料
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可再生能源
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DOI
PubMed
高影响因子
Frontiers of Chemical Science and Engineering
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2021
·Vol. 16
·期 4
·498-510
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IF 4.204
Bo Jinxiao,Li Mei,Zhu Xinli,Ge Qingfeng,Han Jinyu,Wang Hua
The electrochemical conversion of CO 2 -H 2 O into CO-H 2 using renewable energy is a promising technique for clean syngas production. Low-cost electrocatalysts to produce tunable syngas with a potential-independent CO/H 2 ratio are highly desired. Herein, a series of N -doped carbon nanotubes encapsulating binary alloy nanoparticles (M x Ni-NCNT, M= Fe, Co) were successfully fabricated through the co-pyrolysis of mela-mine and metal precursors. The M x Ni-NCNT samples exhibited bamboo-like nanotubular structures with a large specific surface area and high degree of graphitization. Their electrocatalytic performance for syngas production can be tuned by changing the alloy compositions and modifying the electronic structure of the carbon nanotube through the encapsulated metal nanoparticles. Consequently, syngas with a wide range of CO/H 2 ratios, from 0.5:1 to 3.4:1, can be produced on M x Ni-NCNT. More importantly, stable CO/H 2 ratios of 2:1 and 1.5:1, corresponding to the ratio to produce biofuels by syngas fermentation, could be realized on Co 1 Ni-NCNT and Co 2 Ni-NCNT, respectively, over a potential window of −0.8 to −1.2 V versus the reversible hydrogen electrode. Our work provides an approach to develop low-cost and potential-independent electrocatalysts to effectively produce syngas with an adjustable CO/H 2 ratio from electrochemical CO 2 reduction.
研究领域:
材料科学
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电化学
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可再生能源
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催化
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Jinglei Zhang,Yingzhi Jiao,Yantao Duan,Daohu Sheng,Qi Zhao,Aming Xie,Wei Dong,Siyao Cheng
Carbon based materials have garnered significant attention for electromagnetic wave (EMW) absorption owing to their tunable dielectric properties and lightweight nature. However, their reliance predominantly on dielectric loss mechanisms often leads to inferior impedance matching and limited absorption performance. This work presents the development of a magneto-dielectric synergistic system, where precise electromagnetic modulation is enabled by strategic compositional and interfacial engineering. Binary alloy/carbon nanocomposites are synthesized via one pot pyrolysis of metal phthalocyanines, yielding uniformly dispersed alloy nanoparticles within the nitrogen doped carbon matrix. The pyrolysis process simultaneously generates abundant heterogeneous interfaces and multiscale crystalline defects, which collectively promote strong interfacial polarization and multiple dipole relaxation. Asymmetric charge redistribution at the interfaces enhances the interfacial polarization intensity, while the multi component alloy configuration optimizes magnetic anisotropy and natural resonance. These synergistic effects enable multi-path energy dissipation, resulting in superior EMW attenuation. Remarkably, the CuNi/NC composite achieves a minimum reflection loss of – 30.5 dB and a broad effective absorption bandwidth of 5.24 GHz. Furthermore, the coatings containing CuNi/NC contributed to notable reductions in radar cross-section values, confirming its potential for practical applications. This work provides theoretical insights and a practical guideline for designing high-performance EMW absorbers through rational interface and component engineering.
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高影响因子
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