JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Lixin Wang,Renjie Ji,Chunge Wang,Fanbo Meng,Zhongwu Luo,Mengran Wang,Hui Jin,Shijie Yang,Shi’an Zhao,Dahao Han,Yongjie Cheng,Tianyu Liu,Jianmin Ma,Yonghong Liu
To address the limited activity and durability of oxygen evolution reaction (OER) electrocatalysts, we present an integrated in situ strategy for constructing a three-dimensional Ni-Co dendritic electrode matrix coupled with a surface amorphous Ni-Co-Fe layered double hydroxide (LDH) catalytic layer. A Ni-Co dendritic matrix (NCDEM) with enhanced electrolyte accessibility and mass transport properties is first fabricated via jet electrodeposition, followed by the in situ hydrothermal growth of Ni-Co-Fe LDH nanosheets to construct a Ni-Co-Fe dendritic electrode (NCFDE). The introduction of NaBO₂ during the hydrothermal process regulates surface etching kinetics and the Fe³ ⁺ coordination environment, promoting uniform nanosheet growth and triggering the crystalline-to-amorphous transition of the LDH structure. The amorphous LDH layer increases the accessible active surface area, facilitates the formation of reconstructed NiOOH active species during OER, and enhances structural stability during prolonged electrochemical operation. The optimized B2-NCFDE exhibits outstanding OER performance in 1 M KOH, requiring an overpotential of only 215.34 mV to achieve 100 mA cm⁻², with a Tafel slope of 38.29 mV dec⁻¹ and stable operation at 500 mA cm⁻² for 2000 h. Furthermore, the B2-NCFDE||B2-NCFDE electrolyzer achieves 100 mA cm⁻² at a cell voltage of 1.822 V and demonstrates excellent durability for overall water splitting. This work provides a scalable strategy that integrates electrode architecture engineering with amorphous LDH regulation for efficient and durable hydrogen production.
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高影响因子
DESALINATION
·
2025
·
IF 9.8
Shuyu Liu,Liang Tian,Lihua Han,Qing Li,Liangliang Zhu,Su Chen
The conversion of waste plastics into metal-organic framework (MOF) photothermal materials presents promising opportunities for solar energy conversion, facilitating freshwater production and water purification through interfacial solar evaporation, and simultaneously heralding advancements in plastic waste recycling. Herein, we present a bimetallic Co/Fe-MOF photothermal converting material derived from PBAT-based plastic wastes, tailored for efficient solar water evaporation. The nanosheet-structured bimetallic Co/Fe-MOF featuring high light absorption, water wettability and photothermal conversion efficiency delivers an optimal evaporation rate of 1.81 kg m −2 h −1 under one sun irradiation, surpassing that of monometallic MOFs. Moreover, we employed three substrates—nanofiber film, aerogel, and hydrogel—to immobilize the Co/Fe-MOF solar absorbers, thereby constructing monolithic hybrid solar evaporators. These substrates not only confer the flexibility to Co/Fe-MOF solar absorbers for practicability but also serve as mediates to regulate thermal management and water states. Consequently, the hybrid evaporators exhibited significantly enhanced evaporation rates, with the hydrogel evaporator achieving to ~3.53 kg m −2 h −1 , coupled with remarkable salt resistance and durability. This bimetallic Co/Fe-MOF-based solar evaporator efficiently serves a dual purpose, enhancing clean water production through solar desalination and purification while also presenting a viable alternative to the issue of plastic waste, potentially harmonizing energy, environment and clean water nexus.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Bolong Liang,Ming Su,Zhe Zhao,Shu-xuan Liang
Microbial fuel cell (MFC), simultaneously degrading organic pollutants and harvesting electricity, suffers from a sluggish oxygen reduction reaction (ORR) on cathode. The catalysts for Pt substitution are crucial to enhance the ORR performance and power output. Thus, a Co and Fe co-doped carbon derived from ZIF-67 (Co/Fe-NC) is prepared, which is proved to have excellent electrochemical properties. When the catalyst Co/Fe-NC is equipped in microbial fuel cell, the maximum power density of 1831 ± 57 mW m −2 is achieved, which is 13.5 % higher than that of Fe@Co-NC and 49.3 % higher than that of Co-NC. Moreover, the electrochemical tests show that Co/Fe-NC has a smaller charge transfer resistance and a higher exchange current density, which implies the faster kinetics of ORR. The enhanced performance of Co/Fe-NC can be attributed to the rougher rhombic dodecahedral interface, larger surface area, various types of nitrogen species, critical roles of cobalt and iron species, both high graphitization and defects. All these characteristics are responsible for the significant increase in ORR activity and power output. This work designs and compares different catalysts derived from iron-involved ZIF-67, and demonstrates a superior ORR electrocatalyst of Co/Fe-NC, which can be a potential alternative to Pt in the MFC practical application.
研究领域:
环境科学
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材料科学
·
电化学
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高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Li Zhang,Youwen Li,Yuying Feng,Jiahui Jiang,Ting Zhao,Guancheng Xu
A trimetallic selenide electrocatalyst (Co, Fe, Ni)Se2 supported on nickel foam (NF) has been successfully synthesized for the oxygen evolution reaction (OER) and urea oxidation reaction (UOR). The catalyst was fabricated through a two-step strategy involving the formation of metal-organic frameworks (MOFs) precursors followed by a selenization reaction. The optimized (Co, Fe, Ni)Se2/NF-3:1 exhibited remarkable OER activity with an overpotential as low as 170 mV to achieve 10 mA cm-2, along with excellent stability over 1000 cycles. Its superior UOR performance with even lower overpotential further demonstrates promise for urea-assisted energy-saving hydrogen production. The enhanced electrocatalytic performance originates from the synergistic electronic modulation between Co, Fe, and Ni, the rough surface morphology facilitating mass and charge transport, and the highly conductive NF substrate enabling efficient exposure of active sites. This work provides valuable insights into the design of efficient multimetallic selenide electrocatalysts for sustainable electrochemical energy conversion.
研究领域:
电化学
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能源材料
·
催化
·
可持续能源
·
材料科学
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Wenqiang Yang,Qibo Zhang,Samarjeet Singh Siwal,Yixin Hua,Cunying Xu
Herein, S-doped Co-Fe hybrid films with unique 3D porous microsphere arrays stacked by ultrathin nanoflakes directly grown on nickel foam (Co-Fe-S NFs@MS/NF) are synthesized via a single-step co-electrodeposition strategy. The synergistic effects among Fe, S and Co enable superior oxygen evolution reaction (OER) catalytic activity in basic environments. Impressively, this hybrid material can achieve further enhanced OER catalytic performance with surface self-assembly through in-situ electrochemical oxidation activation in both gentle alkaline (GA: 1.0 M KOH at 298 K) and industrial alkaline (IA: 30 wt.% KOH at 353 K) water electrolysis conditions. The transition processes are revealed in detail regarding the chemical, structural, and catalytic properties of the catalysts served in the GA and IA conditions. The pristine quasi-amorphous Co-Fe-S is found to partially transform into crystallized Co(Fe)OOH in the GA condition, while it remains amorphous nature in the IA condition. The enhanced OER activity is attributed to the formation of active Co(Fe)OOH species with massively proliferated specific surface area, optimized electronic structure, and accelerated kinetics. The activated Co-Fe-S NFs@MS/NF exhibits excellent OER activity, achieving 10 and 500 mA cm −2 at ultralow potentials of 1.453 (iR corrected) and 1.517 V with outstanding durability in the GA and IA conditions, respectively. For full water splitting, the assembled two-electrode system based on the Co-Fe-S NFs@MS/NF anode and a Co-S based cathode affords voltages of only 1.518 and 1.685 V to robustly deliver 10 and 500 mA cm −2 in GA and IA conditions over 200 h, respectively.
研究领域:
材料科学
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电化学
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高影响因子
ACS Sustainable Chemistry & Engineering
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2020
·
IF 7.632
Qingqing Zha,Mingxia Li,Zihao Liu,Yonghong Ni
Metal–organic frameworks (MOFs) have attracted much interest in electrocatalysis as promising catalysts in recent years. However, it still remains a challenge to directly use MOF-based materials as bifunctional electrocatalysts for overall water splitting. Herein, a hierarchical Co,Fe-MOF-74/Co/carbon cloth (CC) three-layer hybrid electrode is synthesized by a simple electrochemical deposition technology with subsequent solvothermal treatment. Electrochemical performance investigations show that the as-constructed Co,Fe-MOF-74/Co/CC electrode exhibits impressive electrocatalytic activity for full water splitting, which only requires a low overpotential of 226 mV@20 mA cm–2 for the oxygen evolution reaction (OER) and 94 mV@–10 mA cm–2 for the hydrogen evolution reaction (HER), respectively. Employing the as-constructed electrode as the anode and cathode in a two-electrode setup simultaneously, only 1.65 V of the voltage is needed to deliver the current density of 20 mA cm–2. The above excellent electrochemical performances should be attributed to the specific architecture, the synergistic effect of the Co and Fe species, and the superhydrophilic surface of the catalyst. More importantly, further investigations uncover that metal hydroxides and oxyhydroxides produced in situ during electrochemical tests are the veritable active species, which promote the high catalytic activity of the present catalyst.
研究领域:
材料科学
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电化学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Di Chen,Guofu Li,Xing Chen,Qian Zhang,Jing Sui,Chengjie Li,Yingchao Zhang,Jing Hu,Jianhua Yu,Liyan Yu,Lifeng Dong
Rational construction of advanced bifunctional catalysts with dual-active-sites is still challenging for both oxygen reduction (ORR) and oxygen evolution reactions (OER). Herein, metal-doped dicyandiamide formaldehyde resin is innovatively exploited to synthesize N/Co/Fe/Ni multi-doped carbon nanotubes (denoted as CoFeNi@CNT) with metal-nitrogen-carbon (M N C) and CoFeNi nanoparticles as the ORR and OER active sites, respectively. Abundant active sites and high degree of graphitization enable CoFeNi@CNT with a high ORR half-wave potential of 0.82 V and a low OER overpotential of 440 mV at 10 mA cm −2 , which are comparable or superior to noble-metal catalysts. Particularly, the CoFeNi@CNT air electrode of rechargeable Zn-air batteries shows remarkable open circuit potential (1.46 V), discharge power density (152.3 mW cm −2 ), specific capacity (814 mAh g −1 ), and cycling stability for more than 250 h. It is worth emphasizing that this synthesis strategy is rather simple, low-cost, high yield, and the proportion and amount of doped metal ions can be easily adjusted according to the needs for different applications.
研究领域:
材料科学
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电化学
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能源存储与转换
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PubMed
高影响因子
CATALYSIS LETTERS
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2014
·Vol. 144
·期 6
·1001-1008
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IF 2.291
Lin Chao,Tao Kai,Hua Dayin,Ma Zhen,Zhou Shenghu
Abstract Bimetallic Au 3 M (M = Ni, Co, Fe) nanoparticles (NPs) were synthesized by reducing a mixture of Au 3+ and metal cations (Ni 2+ , Co 2+ , Fe 3+ ) by butyllithium in the presence of oleylamine. Au 3 M NPs were then deposited onto a commercial SiO 2 support. The Au 3 M/SiO 2 samples were not particularly active in the catalytic reduction of p -nitrophenol unless they were converted into Au–MO
x
/SiO 2 after appropriate thermal treatment in air. The Au–MO
x
/SiO 2 catalysts showed good thermal stability and significantly higher p -nitrophenol conversions than Au/SiO 2 . Relevant characterization was conducted employing X-ray diffraction, transmission electron microscopy, Fourier-transform infrared spectroscopy, and ultraviolet–visible spectroscopy. Graphical Abstract
研究领域:
催化化学
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材料科学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Jun Zhang,Lin Hao,Zitong Chen,Yongjun Gao,Huan Wang,Yufan Zhang
Owing to the high demand for clean and renewable energy technologies, several studies have focused on developing economically feasible, highly effective, and stable non-precious electrocatalysts for promoting the oxygen evolution reaction (OER). This development has stimulated an expansion of investigative quests and indicated the importance of advancing electrocatalytic research in this field. Through a facile and efficient method, Ni nanoparticles were uniformly embedded into nanoporous carbon nanorods (Ni-NCN), which are subsequently electrodeposited on CoFe-layered double hydroxide (LDH) nanosheets to produce highly efficient Ni-NCN/CoFe-LDH composites used for OER. The composite exhibited excellent catalytic activity toward OER owing to its low overpotential (ƞ10 mA = 280 mV), small Tafel slope (42 mV dec −1 ), and excellent durability. The Ni-NCN/CoFe-LDH catalyst exhibited higher OER activity owing to its uniformly dispersed Ni nanoparticles, large specific surface area, enhanced electron transport, and synergistic effect of multiple composites. Additionally, the enhanced synergistic effect of Ni-NCN promoted higher OER performance compared with Ni-undoped carbon nanorod/LDH, indicating that the Ni dopant and LDH significantly contributed to the overall OER performance. The synergistic effect of multiple composites significantly contributed to the excellent OER performance, indicating their potential as OER catalyst.
研究领域:
材料科学
·
能源化学
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Xiaofang Cao,Mingkai He,Baopeng Ma,Shixuan Liu,Xiaohui Pang,Mingzhen Song,Fudong Zhang,Xiaolian Chao,Zupei Yang,Di Wu
The band degeneracy thus thermoelectric performance of (Fe, Co)Sb 3 based p -type skutterudites can be well modulated by adjusting Co/Fe ratio. Combining systematic experiments and density function theory (DFT) calculations, we revealed in this work that the variation of Co/Fe ratio could result in complicated and mutually coupled effects on the individual thermoelectric parameters (band degeneracy, band gap, Fermi level , filling limit of fillers, phonon spectrum, etc.) and that using Co/Fe ratio to improve the overall thermoelectric figure of merit is nontrivial. We eventually found that the optimal Co/Fe ratio for Mm (Misch metal) filled (Fe, Co)Sb 3 lies at 1.3:2.7, which is somewhat off the Co/Fe = 1:3 point where the largest valence band degeneracy appears. Extra Sb was then introduced to compensate Sb volatilization for improved electrical transport performance. An overall peak figure of merit ZT max of 1.06 was eventually achieved in the sample Mm 0.8 Fe 2.7 Co 1.3 Sb 12.60 , which is among the highest ones for all reported (Fe, Co)Sb 3 based p -type skutterudites so far.
研究领域:
材料科学
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热电学
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凝聚态物理
·
能源材料
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Qi Chen,Zefeng Yang,Yueling Chen,Jionghua Wu,Jimmy C. Yu,Ling Wu
The fabrication of single atoms on MIL-125(Ti) for photocatalytic ammonia synthesis. • SAs modulate the local electronic structure for charge mobility and separated active site. • The favorable N 2 activation and protons supply optimizes the reduction kinetics. • Magnetic field-induced spin flipping to charge utilization further boost the activity. Photocatalytic nitrogen fixation is an attractive alternative to the energy-intensive traditional ammonia synthesis. However, the major challenge is that most photocatalysts are limited by their low charge mobility, insufficient molecules activation and sluggish reaction kinetics. Herein, we integrated single atoms (Co, Fe, Ni) on MIL-125(Ti) functionalized with sulfhydryl (MIL-125(SH) 2 , MTS) to afford Co-MTS, Fe-MTS and Ni-MTS for photocatalytic nitrogen reduction. Through uniformly dispersed SAs (single atoms) coordinated with O and S atom, such intimate interaction and charge redistribution can efficiently regulate the unsaturated Ti sites for N 2 adsorption and activation. Moreover, the introduced SAs species also serve as separated active center for water oxidation to promote H 2 O adsorption and protons release, kinetically optimizing protons supply and energy barrier of rate rate-determining step for N 2 hydrogeneration. Benefited from the spatially separated metal node-SAs dual sites and favorable reaction energy barrier, the optimized Ni-MTS sample shows an ammonia yield rate of 72.6 μmol·g −1 ·h −1 with an apparent quantum efficiency of 0.49% at 400 nm. This can be further enhanced by magnetic field-induced spin flipping contributed to charge utilization. This work would inspire the development of other high-efficiency single atom/MOFs that combining molecular activation and protons supply for photocatalysis.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Wenhua Li,Ruilin Wang,Xiang Li,Ge Gao,Chuanyong Yan,Qianqiao Chen
ZIF confinement disperses CoFe nitride uniformly and tunes Co/Fe ratio precisely. • Co/Fe bimetallic coupling lead to synergistic effects for bifunctional HER/OER. • Low overpotentials reach 85 mV (HER@10 mA·cm −2 ) and 273 mV (OER@50 mA·cm −2 ). • Overall water splitting requires 1.59 V at 10 mA·cm −2 with durability over 100 h. CoFe-based materials are considered promising bifunctional catalysts for overall water splitting due to multicomponent synergistic effects. However, unrestricted metal atom migration during high-temperature synthesis causes particle aggregation and excessive Co–Fe interdiffusion, which destroys bimetallic interfacial structures, covers active sites, and hinders electronic modulation, thus limiting catalytic activity and stability. To solve these problems, a ZIF-assisted spatial confinement strategy is adopted herein. The ZIF framework constrains high-temperature atomic migration, alleviates particle coarsening, and weakens metal interdiffusion to maintain intact bimetallic interfacial environments, while exposing sufficient active sites. Further combining carbonization and in-situ nitridation modification, a composite system of CoFe metal nitride and N-doped carbon was prepared, significantly improving the kinetic properties of HER and OER. The optimal catalyst achieves an overpotential of 85 mV for the HER at 10 mA·cm −2 , and 273 mV for the OER at 50 mA·cm −2 , exhibiting superior catalytic performance compared with commercial noble-metal benchmarks. The assembled overall water splitting system requires only 1.59 V at a working current of 10 mA·cm −2 , and can operate stably for 100 h at 50 mA·cm −2 . This work provides a reliable strategy for inhibiting high-temperature structural degradation of CoFe-based catalysts toward high-efficiency and durable electrocatalytic water splitting.
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高影响因子
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