Electronic Materials Letters
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2026
·
IF 3.1
He Fangzhen,Bai Ying,Zhang Aiju,Zhang Xiaolin,Wang Fang,Wang Qingyun,Zhong Ming,Su Bitao,Dong Na
Amidst escalating global energy crises and environmental degradation, biomass resources offer a critical pathway for energy transition through their inherent renewability, carbon neutrality, and abundance. However, efficient conversion of waste biomass remains impeded by compositional complexity and suboptimal process energetics, constraining scalable industrial implementation. Building on this, we innovatively utilize waste grapefruit peel as a multifunctional precursor to construct Ni-Mo₂C heterojunction nanocomposites (Ni-Mo₂C/NGC) on a biomass-derived N-doped graphene-like carbon matrix (NGC) via an in situ one-step pyrolysis strategy. Electrocatalytic evaluation reveals that the nanocomposite exhibits outstanding bifunctional activity for both oxygen and hydrogen evolution reactions (OER/HER) in alkaline electrolyte, achieving low overpotentials ( η ) of 260 mV for OER and 120 mV for HER at a current density of 10 mA cm⁻², with corresponding Tafel slopes of 48 and 52 mV dec⁻¹, respectively. Density functional theory (DFT) calculations elucidate that synergistic interfacial electron coupling between Ni and Mo₂C at the heterojunction significantly elevates the density of exposed catalytic active sites, optimizes the adsorption free energy of key reaction intermediates, and accelerates interfacial charge transfer kinetics, thereby cooperatively enhancing the intrinsic bifunctional electrocatalytic activity. This study establishes a novel strategy for the high-value-oriented preparation of high-performance electrocatalysts from waste biomass, providing insights into the construction of non-precious metal bifunctional heterojunction catalysts. Graphical
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 23
·11389-11397
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IF 3.925
Baoli Wang,Yuhao Huang,Yijing Ai,Yucen Yao,Fan Shi,Shiguan Xu,Zejun Zhang,Xianghui Wang,Wei Sun
Developing non-noble and high-performance electrocatalysts towards the hydrogen evolution reaction (HER) in both acidic and alkaline media remains a stern challenge. Herein, the composite of P-doped Mo2C and a hierarchically ultrathin N, P-doped carbon nanoribbon network (P-Mo2C/NPC) is proposed through a facile simultaneous phosphating-carbonization strategy, in which biomass and phosphomolybdic acid (PMA) were employed as the carbon precursor and metal precursor, respectively. The doping of the electronegative P heteroatom increases the active sites, weakens the Mo–H bond strength in the HER, and facilitates the electron transfer. Consequently, the synthesized catalyst exhibits good intrinsic activity towards the HER, and shows low overpotentials of 172 mV and 118 mV to afford the current density of 10 mA cm−2 in 0.5 M H2SO4 and 1.0 M KOH electrolyte, respectively. Furthermore, the synthesized catalyst can sustain 24 h with stable performance, which is greatly favorable for industrial applications. This work may shed some light on the rational design and manufacture of HER electrocatalysts with high compatibility to different electrolytic environments.
研究领域:
材料科学
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电化学
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催化
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能源材料
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DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Jialong Wu,Xiaoning Zhang,Fucheng Ju,Can Huang,Carrie Donley,Peng Xiao,Lan Xu,Hongju Zhang
The broad use of the electrocatalytic hydrogen evolution reaction (HER) is impeded by challenges associated with the availability and high cost of precious metal-based catalysts. Carbon materials co-doped with transition metals and nitrogen have emerged as highly promising alternatives among non-precious metal-based electrocatalysts due to their advantageous features, such as cost-effectiveness, high activity, and excellent stability. This study focuses on incorporating low-cost sodium molybdate onto silk fabric, which serves as a sustainable precursor for the preparation of nitrogen-doped carbon material. This silk fabric is then carbonized to create a flexible electrode for electrocatalytic hydrogen evolution. The resulting electrode exhibits the in situ growth of Mo 2 C and MoO 3 , and this mechanism facilitates a smoother conduction path for electrons. The resulting electrode not only possesses flexible characteristics but also exhibits a large specific surface area. Transmission electron microscopy analysis reveals the presence of carbon quantum dots, which actively contribute to the heightened catalytic hydrogen evolution activity of the prepared electrode. Experimental findings unequivocally showcase the outstanding electrocatalytic hydrogen evolution capability and operational stability of the fabricated flexible electrode in acidic and alkaline environments. This work substantiates the efficacy of using low-cost sodium molybdate-loaded silk fabric as a catalyst precursor, thereby providing robust support for the design and implementation of non-precious metal-based electrocatalysts for the HER. This approach advances the development and broader application of carbon-free fuels.
研究领域:
材料科学
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电化学
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可持续能源
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高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 9
·2903-2911
·
IF 6.177
Zhenzhen Yang,Yuhan He,Pengfei Tang,Bangchong Zhu,Genlei Zhang,Jianbo He
Direct conversion of biomass-based fructose to 2,5-diformylfuran (DFF) has attracted much attention in recent years. In this study, molybdenum carbide anchored on glucose-derived carbon (β-Mo2C@C) was synthesized by a simple, green and economical method and was found to be highly active for production of DFF from 5-hydromethylfurfural (HMF) and fructose. DFF was obtained with high yields of 94.5% and 76.0% from aerobic oxidation of HMF and “one-pot” conversion of fructose under optimal reaction conditions, respectively. A probable mechanism involving Mo6+/Mo2+ redox cycles was proposed for β-Mo2C@C-catalyzed oxidation of HMF to DFF according to the experimental and characterization results. Furthermore, the β-Mo2C@C catalyst can be reused without much loss of catalytic activity, suggesting that β-Mo2C@C is highly stable.
研究领域:
化学工程
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催化材料科学
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高影响因子
iScience
·
2024
·
IF 4.6
Marian Chufarov,Yuliya Z. Vassilyeva,Xinyu Zhang,Shilin Li,Alexander Y. Pak,Wei Han
A crucial challenge in hydrogen production through electrolysis is developing inexpensive, earth-abundant, and highly efficient Pt-free electrocatalysts for the hydrogen evolution reaction (HER). Molybdenum carbide is ideal for this application because of its special electrical structure, low cost, and advantageous characteristics. Herein, the long-lived electrocatalysts for HER have been synthesized via the direct current (DC) arc discharge plasma method under ambient air conditions, and the relationship between the properties of materials and catalytic characteristics has been established. The samples differed in the ratio of molybdenum, graphite, and melamine. The sample with the highest proportion of melamine in the initial mixture has Mo2C-MoO2 heterointerfaces, which demonstrates the highest and most stable electrocatalytic activity with the overpotential of 148 mV at 10 mA·cm- 2 and Tafel slope of 63 mV·dec −1 in alkaline electrolyte. Meanwhile, the electrodes demonstrated long-lived electrochemical durability for two weeks and investigated the features of forming a stable system for HER.
研究领域:
材料科学
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能源化学
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DOI
PubMed
高影响因子
Materials
·
2025
·Vol. 18
·期 5
·1141
·
IF 3.2
Zhe Yang,Yicheng Han,Kai Chen,Guodong Zhang,Shuangxi Xing
In this paper, the natural waste pinecone as a carbon precursor for the generation of satisfactory sulfur host materials in lithium–sulfur batteries was realized by introducing molybdenum carbide nanoparticles into the derived carbon structure. The conductive pinecone-derived carbon doped with N, O reveals an expansive specific surface area, facilitating the accommodation of a higher sulfur load. Moreover, the integration of Mo2C nanoparticles also significantly enhances its chemical affinity and catalytic capacity for polysulfides (LiPSs) to alleviate the shuttle effect and accelerate sulfur redox conversion. As a result, the WPC-Mo2C/S electrode displays excellent electrochemical performance, including a low capacity decay rate of 0.074% per cycle during 600 cycles at 1 C and an outstanding rate capacity (631.2 mAh g−1at 3 C). Moreover, with a high sulfur loading of 5.5 mg cm−2, the WPC-Mo2C/S electrode shows a high area capacity of 5.1 mAh cm−2after 60 cycles at 0.2 C.
研究领域:
能源材料
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环境科学
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DOI
PubMed
高影响因子
Journal of Cleaner Production
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2023
·
IF 11.1
Hao Cheng,Xinyan Li,Chao Huang,Jian Zhu,Ping Wang,Heng Cao,Chongling Feng,Dingxun Ling,Hao Liu,Min Cheng
Commercial molybdenum carbide (Mo 2 C) and ferrous iron (Fe 2+ ) were investigated for the first time to co-catalyze the activation of H 2 O 2 for the treatment of organic contaminants . Compared with traditional Fenton process, the presence of Mo 2 C decomposed hydrogen peroxide (H 2 O 2 ) more effectively and accelerated the conversion of Fe 3+ /Fe 2+ . The Rhodamine B (RhB) degradation rate constant in Mo 2 C/Fe 2+ /H 2 O 2 reached appropriately three times that in Fe 2+ /H 2 O 2 , and the co-catalytic reactivity of Mo 2 C was significantly higher than that of MoS 2 . In addition, Mo 2 C/Fe 2+ /H 2 O 2 exhibited a board effective pH range of 2.8–8.8, and four-cycle experiments confirmed the stability and reusability of Mo 2 C. The results of X-ray photoelectron spectroscopy (XPS) indicated that Mo(Ⅱ) and Mo(IV) played major roles in Fe 3+ reduction. Electron Paramagnetic Resonance analysis and quenching experiments demonstrated that hydroxyl radical (·OH), superoxide anion radical (O 2 − ) and singlet oxygen radical ( 1 O 2 ) were all involved in Mo 2 C/Fe 2+ /H 2 O 2 . Particularly, Mo 2 C/Fe 2+ /H 2 O 2 significantly enhanced the generation of ·OH and 1 O 2 in comparison to Fe 2+ /H 2 O 2 . Moreover, toxicity assessment analysis by ECOSAR suggested that the toxicity of most degradation products of RhB decreased after treatment. Overall, this study offers a promising Mo 2 C co-catalyzed Fenton process for rapid and efficient abatement of organic contaminants.
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高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2025
·
IF 4.6
Lu Wang,Bing-Han Sun,Jian-Jun Yu,Jian-Li Li
In the work, the method of chemical vapor deposition reaction of CO and gaseous MoO 3 was proposed to prepare ultrafine Mo 2 C. Different technologies, such as XRD, FESEM, TEM, laser particle size analysis and Brunauer-Emmett-Teller method, as well as thermodynamic software FactSage 8.3, were adopted to analyze the experimental data. The results revealed that increasing the flow-rate of reduction‑carbonization regent CO ( V outer (CO)) was beneficial for the formation of Mo 2 C; while when V outer (CO) exceeded the threshold value, single-phase Mo 2 C cannot be prepared. The optimal conditions for preparing ultrafine Mo 2 C were given as T = 1223–1323 K, V outer (CO) = 900 mL/min, and V inner (Ar) = 100 mL/min; herein, V inner (Ar) means the flow-rate of carrier gas Ar. Under these conditions, the preparation procedures of Mo 2 C followed the pathways of MoO 3 → (MoO 3 ) n ( n = 2, 3, 4, and 5) → MoO 2 → Mo 2 C. The study also discovered that the as-prepared Mo 2 C kept the overall morphology as the intermediate product MoO 2 with a hexagonal-platelet structure; however, due to the removal of oxygen and the decrease of products' molar volume, the prepared Mo 2 C exhibited a rougher and more porous micro-structure with a specific surface area up to 36.7 m 2 /g. This work may provide an important methodical guidance for the scale-preparation of ultrafine Mo 2 C.
研究领域:
材料科学
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化学工程
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纳米材料
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无机合成
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热力学
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高影响因子
Small
·
2017
·Vol. 13
·期 32
·1701246
·
IF 8.643
Chunli Wang,Lianshan Sun,Feifei Zhang,Xuxu Wang,Qujiang Sun,Yong Cheng,Limin Wang
Highly uniform hierarchical Mo–polydopamine hollow spheres are synthesized for the first time through a liquid-phase reaction under ambient temperature. A self-assembly mechanism of the hollow structure of Mo–polydopamine precursor is discussed in detail, and a determined theory is proposed in a water-in-oil system. Via different annealing process, these precursors can be converted into hierarchical hollow MoO 2 /C and Mo 2 C/C composites without any distortion in shape. Owing to the well-organized structure and nanosize particle embedding, the as-prepared hollow spheres exhibit appealing performance both as the anode material for lithium-ion batteries and as the catalyst for hydrogen evolution reaction (HER). Accordingly, MoO 2 /C delivers a high reversible capacity of 940 mAh g −1 at 0.1 A g −1 and 775 mAh g −1 at 1 A g −1 with good rate capability and long cycle performance. Moreover, Mo 2 C/C also exhibits an enhanced electrocatalytic performance with a low overpotential for HER in both acidic and alkaline conditions, as well as remarkable stability.
研究领域:
材料科学
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电化学
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纳米材料
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能源存储
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催化化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 27
·13030-13036
·
IF 3.925
Yu-Hang Zhao,Tao Zhang,Xiao-Feng Wang,Shao-Jie Li,Yu Pan,Yihan Wang,Xue-Zhi Song,Zhenquan Tan
The rational exploration of highly active and low-cost materials for electrocatalytic hydrogen evolution is extremely imperative, but remains challenging as well. Transition metal carbides (TMCs) as highlighted electrocatalysts usually exhibit unsatisfactory activity and stability. In this work, we demonstrate a two-step strategy for electrocatalyst synthesis involving biomass-derived tannic acid (TA) and coordination assembly preparation followed by subsequent high-temperature carbonization. Interestingly, by simply controlling the feed amount of TA, heterostructured nitrogen-doped graphene-coated Mo3Co3C-based tri- and bi-component electrocatalysts (Mo3Co3C/Mo2C/Co@NC and Mo3Co3C/Co@NC) can be obtained with phase regulation and interface engineering. It is observed that the heterostructured materials possess more active sites than that of the TMC-excluding sample (Co@NC). Moreover, the tri-component Mo3Co3C/Mo2C/Co@NC may enhance the intrinsic activity at each active site due to the strong interaction at the Mo3Co3C/Mo2C interface. These advantages allow the Mo3Co3C/Mo2C/Co@NC catalyst to deliver superior electrocatalytic activity and favorable kinetics towards the HER, with a low overpotential of 211 mV and a Tafel slope of 96.0 mV dec−1. Furthermore, it has good long-term stability. This work provides new inspiration for heterostructured TMC-based electrocatalysts with high performance towards promising catalytic applications.
研究领域:
材料科学
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电化学
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高影响因子
Energy & Environmental Science
·
2024
·Vol. 17
·期 14
·5227-5240
·
IF 32.4
Changle Yue,Chao Feng,Guangxun Sun,Na Liu,Haoyuan Hao,Wenjing Bao,Xiaowei Zhang,Fengyue Sun,Cong Zhang,Jiahui Bi,Yan Zhou,Hsiao-Chien Chen,Yuan Pan,Daofeng Sun,Yukun Lu
Tuning and stabilizing the chemical microenvironment of Pt-based single-atom catalysts is a major challenge in promoting an electrocatalytic hydrogen evolution reaction (HER). Herein, we constructed a hierarchical stabilization system of Pt single-atoms via defect substitution using the polyoxometalate (POM) (NH4)4[ZnMo6O24H6] (ZnMo6) as a template. The well-defined structure of ZnMo6 led to precise local Zn sublimation during the formation of Mo2C, which was converted from the Mo6 ring in situ. The localized defect provides a well-defined Mo(C)–Pt–N coordination environment to trap Pt single-atoms. The obtained single-atom catalyst (PtSA@Mo2C@NC) exhibited a superior and stable electrochemical HER performance with an unprecedented mass activity of 75.21 A mgPt−1 in 0.5 M H2SO4. In-depth theoretical calculation analysis revealed that Mo(C)–Pt–N coordination provides a moderated charge state and low d-band center of the Pt site, thus significantly promoting proton adsorption and H2 desorption. This work demonstrates a promising single-atom stabilization strategy for constructing high-performance HER electrocatalysts through the precise modulation of a three-dimensional chemical environment.
研究领域:
材料科学
·
电化学
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催化
·
能源材料
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DOI
高影响因子
FUEL
·
2018
·
IF 4.908
Fei Wang,Junming Xu,Jianchun Jiang,Peng Liu,Fanglin Li,Jun Ye,Minghao Zhou
Catalysts were prepared and utilized in the hydrotreatment of vegetable oil and FAME to produce diesel-like hydrocarbons. Mo 2 C/AC catalyst displayed the higher catalytic activity with 100.00% conversion and 21.01% cracking ratio, compared to MoO/Al 2 O 3 (85.64%, 25.79%), MoS 2 /Al 2 O 3 (83.46%, 11.88%), Mo/Al 2 O 3 (67.99%, 33.19%), NiP/Al 2 O 3 (48.72%, 3.49%), Ni/Al 2 O 3 (18.12%, 0.00%), and MoO/AC (56.05%, 18.55%). The reaction condition was also optimized, and the bio-diesel achieved 100.00% conversion, 9.67% cracking ratio and 0.73 HDO/DC ratio over Mo 2 C/AC under the optimal condition. The conversion over Mo 2 C/AC dropped from 100.00% to 87.08% and 71.06% with cycles. The results of XRD , XPS and N 2 adsorption–desorption demonstrated that the coke deposited on the surface of catalyst and the formation of MoO 2 and MoO 3 led to the deactivation. After regeneration, the catalyst recovered and achieved 99.36% conversion.
研究领域:
化学工程
·
催化
·
可再生能源
·
生物燃料
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）