ChemSusChem
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2025
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IF 6.6
Muhammad Wasim,Muhammad Tayyab,Ali Arbab,Abdul Zeeshan Khan,Zulakha Zafar,Muhammad Arshad,Rida Javed,Maira Liaqat,Xian-Zhu Fu,Jing-Li Luo
Developing cost-effective, eco-friendly electrocatalysts with strong electrochemical performance is essential for advancing in water electrolysis. Noble metal-based catalysts offer excellent activity, but due to less availability and more expenses leads to an urgent demand for efficient, affordable, and earth-abundant alternatives. In this study, a bimetallic foam architecture (CuF@Ni) was fabricated by electrodeposition of Ni on CuF. This structure acts as both a conductive support and an active electrocatalyst. The synthesized CuF@Ni demonstrated superior HER activity and overpotential of 0.18 V at 50 mA/cm², while for MOR overpotential was observed 0.14 V at 50 mA/cm². CuF@Ni electrocatalytic electrode achieved a Faradaic efficiency ~100 %, with a formate (HCOO-) concentration of 7.9 mM during 150 C charge transfer. In a co-generation system integrating HER and MOR the onset potential was observed as lower 0.4 V and CuF@Ni required only 0.92 V to sustain the current density of 50 mA/cm², demonstrating significant energy savings. In addition, device consumes less power than theoretical water electrolysis under higher current density. Long-term stability tests confirmed minimal degradation under the harsh conditions. This study highlights CuF@Ni as a promising dual-functional electrocatalyst for efficient energy conversion for future renewable energy applications.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Ruihan Li,Feng Hu,Ran Wu,Jianyi Xu,Jin Xu,Zhonghui Hou,Min Zhou,Junyu Bai,Yanghuan Zhang
In the present study, the synthesis of NdMg 12 + x wt%Ni( x = 0, 5, 10, 15) alloy was effectively accomplished through the technique of ball milling , and the profound impact of Ni on the microstructural attributes, as well as the hydrogen absorption and desorption characteristics of NdMg 12 alloy, was meticulously examined. The microstructural analysis reveals that Ni can notably facilitate the development of nanocrystalline and amorphous structural configurations. Subsequent investigations uncovered that a portion of Ni was transformed into the Mg 2 Ni phase on the surface of the NdMg 12 alloy, thereby increasing the number of hydrogen absorption active sites and subsequently enhancing the hydrogen absorption and desorption capabilities of the NdMg 12 +Ni alloy. A thermodynamic analysis reveals that the incorporation of Ni exerts a substantial elevating effect on the hydrogen desorption plateau pressure of NdMg 12 +Ni alloy. As the Ni content escalates from 0 wt% to 5 wt%, the enthalpy of the hydrogen desorption process plummets significantly, from 89.1888 kJ/mol H 2 to 80.2806 kJ/mol H 2 . Concurrently, the addition of Ni markedly diminishes the hysteresis coefficient during hydrogen absorption and desorption, thereby enhancing the overall hydrogen absorption and desorption efficiency of NdMg 12 +Ni alloy. Moreover, the inclusion of Ni not only expedites the hydrogen absorption rate within the NdMg 12 +Ni alloy but also substantially diminishes the activation energy for hydrogen desorption, effectively lowering the minimal hydrogen desorption temperature from 261℃ to 199℃. Notably, the NdMg 12 + 10 wt%Ni alloy exhibited the lowest activation energy (Ea = 114.4995 kJ/mol) and demonstrated superior hydrogen desorption kinetics.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Jinyuan Dong,Silan Chen,Xiaotian Wang,Yuguang Mao,Xiaoxiao Jing,Zhixu Ouyang,Jiabao Ding,Jianjun Tian,Yujin Ji,Youyong Li,Wu-Jun Shi,Yang Han,Weifeng Zhang
Co3Sn2S2 (CSS) possesses robust surface states and high conductivity derived from Co atoms with Weyl points located only 60 meV above the Fermi level (Ef), revealing the probability of tuning the electronic band structure of CSS by doping with transition metal atoms. Here, Fe, Ni, and Cu atoms have been successfully incorporated into CSS, which turns out that the Fe0.1–CSS possesses better activity than CSS and IrO2 with an overpotential of 298 mV to reach the current density of 10 mA cm–2 and a Tafel slope of 358.3 mV dec–1 in 1 M KOH. The Fe0.1–CSS also shows better activity and stability than IrO2 as an anode for the anion exchange membrane water electrolyzer in 1 M KOH. Besides, the density functional theory results indicate that the band structure of CSS is adjusted by the incorporation of transition metal atoms, which is related to the regulation of Ef and thus the variation in electrolytic performance. Our findings provide a strategy to further engineer the activity of a topological semimetal, which provides a direction toward material design for catalysis and beyond.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Zhong Wang,Jinzhou Li,Shuang Yuan,Jinshuo Yang,Zhiqiang Jin,Xinjia Tan,Jie Dang,Wangzhong Mu,Guojian Li,Qiang Wang
FeCoNi-based high entropy intermetallic compounds are promising substitutes for noble metal catalysts for hydrogen evolution reaction (HER) and oxygen evolution (OER), while their activity is restricted by the synergistic effect between the elements. In this paper, the theoretical model of FeCoNiMnMoP bifunctional catalyst has been reasonably designed given the volcanic curve of M−H bond energy as a valuable guide for candidate metal elements. Theoretical calculations show that the synergistic effect between multiple sites not only accelerates the electron transfer but also reduces the rate-determining step (RDS) barrier. At the same time, the introduction of Mo also enhances the total density of states and reduces the d-band center, thus optimizing the adsorption and dissociation of intermediates. The experimental results confirm that the theoretical model has excellent catalytic performance. In the alkaline solution, FeCoNiMnMoP‖FeCoNiMnMoP requires only an ultra-low cell voltage of 1.49 V for overall water splitting when the current density is 10 mA cm −2 . In general, novel insights on the effects of intermetallic synergies on water decomposition are provided, which is helpful for the design of bifunctional catalysts based on volcanic diagrams.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Leyang Li,Ruiyang Sun,Rui Yuan,Manpeng Lin,Linlin Wang,Qi Wang,Jiguo Tu,Handong Jiao,Shuqiang Jiao
Molten-salt electrorefining (MSE) is currently the primary method for purifying many elements, offering promise for the sustainable upcycling of spent metals in the future. However, the conventional constant-current electrolysis protocol inevitably leads to deterioration of the microenvironment near the electrode, leading to reaction runaway and process inefficiency. In this work, we comprehensively studied for the first time the effect of constant- and pulse-electrolysis protocols on environmental evolution in electrode–electrolyte interfaces during the MSE of Ti, using a computer model. The results showed that compared to constant electrolysis, pulse-electrolysis protocols could effectively regulate the interfacial microenvironment and improve the electrorefining efficiency. Furthermore, a correlation between interfacial reconstruction and pulse parameters was established, indicating that the duty ratio was the key factor in inhibiting the deterioration of the interfacial microenvironment. To further verify the simulation results, the real-time morphological evolution of the electrodes during electrolysis was monitored by a novel in situ X-ray computed tomography (CT) technology under pulse-electrolysis protocols. The experimental results indicated that the pulse-electrolysis protocols enhanced the interfacial microenvironment and promoted electrolysis efficiency. Collectively, this work demonstrated that MSE could be effectively advanced by rationally designing the pulse-electrolysis protocols, facilitating its large-scale application in industry.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Yanling Wang,Yu Wang,Wensheng Fu,Guanyun Gao,Yanru Liu,Lei Wang
The preparation of low-cost and high-activated catalysts is an important challenge in the development of hydrogen production industry. Here we reported a novel core-shell triangular cone electrocatalyst Ni 3 S 2 @Ni 3 N@Co 2 N 0.67 grown on nickel foam (Ni 3 S 2 @NiCoN/NF) obtained by a self-templated method. The obtained Ni 3 S 2 @NiCoN/NF consists of Ni 3 S 2 triangular cone core and Ni 3 N@Co 2 N 0.67 particles shell, which has rich heterogeneous interface and synergistic effect. The strong electronic interaction at the newly bonded heterojunction regulates the electronic structure of active Ni, which is conducive to the transfer of charge to the active site. In addition, NiCoN particles are coated on the surface of Ni 3 S 2 triangular pyramidal nucleus to form a core-shell structure, which can make sure the exposure of active sites. It is found that the self-templated conversion of Co(OH) 2 coated Ni 3 S 2 into NiCoN/Ni 3 S 2 enhances the activity for hydrogen evolution reaction (HER). The hybrid material has excellent HER catalytic performance under alkaline conditions, which only needs to overcome the overpotential of 63 and 174 mV to reach the current density of 10 and 100 mA cm −2 , respectively. This study provides a new idea for the preparation of efficient and stable catalysts with core-shell structure for HER.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Vu Van Thuy,Nguyen Truong Son,Vu Hoang Ha,Le Xuan Duong,Tran Viet Thu
Prussian blue analogues (PBAs) are promising positive electrodes in sodium-ion batteries because of their three-dimensional structure, high capacity, and low-cost. In this work, we synthesize sodium-rich nickel-cobalt hexacyanoferrate (Na-rich NixCoyHCF) and study the influence of Na+ incorporation on the structure and electrochemical properties of the resulting material alongside NixCoyHCF, NiHCF, and CoHCF. The Na+ incorporation introduces minor lattice distortions but retains the fundamental crystal structure of NixCoyHCF and facilitates Na+ diffusion. Na-rich NixCoyHCF exhibited significantly enhanced specific capacity of 303.15 F/g at a current density of 1.0 A/g in aqueous electrolyte compared to its non-Na+ counterparts. The assembled hybrid device delivered a high energy density of 166.15 μWh cm-2 at a power density of 1800 μW cm-2 and 83.7% capacity retention over 2000 cycles at 5 mA cm-2. These results indicate the Na+ incorporation is an efficient strategy to prepare high-performance electrode for aqueous Na-ion storage.
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高影响因子
Matter
·
2025
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IF 17.5
Shining Wu,Yuting Zhang,Guanwu Li,Yifeng Hou,Mengyang Cao,Chengyu Wei,Pengkun Yang,Lu Huang,Yingpeng Wu
High-entropy alloys (HEAs) have a wide range of applications due to their excellent physical and chemical properties. However, traditional synthesis routes always require high temperatures over 923 K or have high equipment requirements. Here, we developed a liquid metal gallium (Ga)-mediated strategy using only a commercial vortex mixer and metal powders to synthesize HEAs near room temperature (303 K) with low power (7 W). A variety of HEAs were successfully prepared, and the yield can be expanded to over 10 g each time. The mechanistic investigation proved that Ga continued to flow under the mechanical force and exposed fresh surfaces to contact the metal, thereby promoting the process of metal dissolution in Ga and forming HEAs. These as-prepared HEAs can be used for catalysis in electrochemical oxygen evolution reactions with low overpotential and high durability. This strategy provides an innovative method for low-energy synthesis of HEAs at room temperature.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Qingming Zeng,Yanjun Wen,Xiaoguang Duan,Xing Xu,Jing Tan,Qingyan Zhang,Yilin Liu,Qingyi Zeng
In this work, we revealed a dual-pathway nonradical oxidation (NRO) system catalyzed by Ni single atom catalyst (NiN 4 ) accommodated in the carbon nitride substrate. The monatomic Ni coordinated with four N atoms (Ni-N 4 ) is determined as the dynamic catalytic center for peroxymonosulfate (PMS) activation, showing an exceptional specific rate constant of 3.34 min −1 g −2 L −2 (29.7 times that of CN/PMS system) in oxidizing bisphenol A and other refractory organics. In situ Raman, X-ray absorption, and electrochemical analyses as well as theoretical simulations demonstrate that the Ni-N 4 sites exhibit strong interaction with PMS benefited from the modulated electronic structures, resulting in nonradical surface-bonding active complexes (NiN 4 -PMS*) and deuterogenic high-valent Ni(IV)-Oxo species. The dual-pathway NRO process will spontaneously coordinate both electron transfer process via CN matrix and direct electron transfer by Ni(IV)-Oxo for selective organic oxidation with excellent anti-interference ability and adaptability.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
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IF 6.1
Jingsi Wang,Shuang Liu,Guibin Lou,Ya Chen,Haozhe Pang,Yachao Song,Syed Mesum Raza Naqvi,Kai Zhou,Zongjun Tian,Muhammad Ali Nasir,Dongsheng Wang,Lida Shen
High infrared emissivity coatings have important engineering value in aerospace and electronic devices. In this study, a new method for preparing high infrared emissivity coatings using magnetic field-assisted jet electrodeposition was prepared. The magnetic field-assisted jet electrodeposition technique can be used to prepare coatings with rough structures, and the infrared emissivity of nickel particle coatings can reach 0.80 at a magnetic field intensity of 100 mT, which is significantly improved compared with the nickel coatings (0.155) prepared by conventional electrodeposition. A nickel-based SiC composite coating with high infrared emissivity was prepared by combining magnetic field-assisted jet electrodeposition with SiC particles. Compared with the nickel particle coating, the infrared emissivity of the nickel-based SiC composite coating is further improved. At a concentration of 6 g/L SiC particles, the infrared emissivity of the nickel-based SiC composite coating reached 0.94. The synergistic effect of magnetic field-assisted jet electrodeposition and SiC particles can realize the nickel coatings into coatings with high infrared emissivity.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
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IF 11.2
Hui Wan,Meng-Yuan Xie,Bo Li,Jian-Hang Nie,Tao Huang,Lei Li,Jing-Hui Shi,Ming-Hua Xian,Jia-Rong Huang,Wangyu Hu,Gui-Fang Huang,Fei Gao,Wei-Qing Huang
Transition metal (oxy)hydroxides are potential oxygen evolution reaction (OER) electrocatalysts; however, simultaneously modulating multiple factors to enhance their performance is a grand challenge. Here, we report an incorporating heteroatom strategy via one-step hydrothermal approach to adjust more than one factor of Mn-doped NiFe (oxy)hydroxide (Mn-NiFeOOH/LDH) heterojunction . Mn doping regulates heterojunction morphology (reducing nanoparticles and becoming thinner and denser nanosheets), Ni/Fe ratio and valence states (Ni 2+ , Ni 3+ , and Ni 3+Δ ) of Ni ions. The former could effectively increase surface active sites, and the latter two reduce the content of Fe in the Mn x -NiFeOOH/LDH heterojunction, enabling more Ni 2+ convert to Ni 3+/3+Δ that have higher intrinsic OER activity. As a result, the first-rank Mn-NiFeOOH/LDH with ultra-low overpotential of 185 mV@20 mA cm −2 and 296 mV@500 mA cm −2 , and the improved OER performance are outdo to those of commercial RuO 2 catalyst for OER. Moreover, the Mn-NiFeOOH/LDH affords the earliest initial potential (1.392 V vs. RHE), corresponds to a recorded low overpotential (162 mV). Based on the density functional theory (DFT), Mn dopants can alter intermediate adsorption energy and effectively decrease *OOH’s energy barrier. This research exhibits a feasible strategy to design low cost electrocatalysts and provide new possibilities for future industrialization.
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高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Yixuan Wang,Hongyan Ban,Yugao Wang,Ruwei Yao,Shimin Zhao,Jiangliang Hu,Congming Li
Basic sites profoundly affect the mode and strength of CO 2 adsorption in the hydrogenation of CO 2 to formic acid (FA), however, the mechanism by which the quantities and strength of basic sites affect the reaction process is not yet clear. Herein, a Ni/Mg a AlO x catalyst has been developed and the basic sites of the catalyst can be modulated by simply altering the Mg/Al ratio. Through a series of characterizations and experiments, it was observed that weak and medium basic sites synergistically catalyzed the hydrogenation of CO 2 to formic acid, and a reasonable number of weak basic sites can improve reaction performance when a sufficient number of medium basic sites guarantee the fundamental catalytic activity. Moreover, the number and distribution of basic sites are also tightly related to metal-support interactions. This strategy provides theoretical guidance and a feasible scheme for optimizing the performance of non-precious metal heterogeneous catalysts.
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高影响因子
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