INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Yang Shi,Pei Liu,Zhenluo Yuan,Xiaojiao Wang,Qiuming Peng,Shumin Han,Yanping Fan,Baozhong Liu
The exploitation of high-performance catalysts is essential for practical application of hydrogen production technology by ammonia borane (AB) hydrolysis. In this work, we reported an uncomplicated approach to exploit high-performance catalysts for hydrogen production from AB hydrolysis. Using the reducibility of AB, the Ru 0 /Mo 2 C MXene catalyst was synthesized using Mo 2 C MXene as carrier to hydrogen production from AB hydrolysis. The combination of Mo 2 C MXene and Ru nanoparticles exhibited remarkable catalytic performance. The TOF value was 868.6 min −1 and the hydrogen production rate reached as high as 210,464 mL min −1 g Ru −1 at 298 K. Moreover, the Ru 0 /Mo 2 C MXene catalyst showed good durability and continuously produce hydrogen for more than 4 h with a turnover number (TON) of 41293. Characterization analysis revealed that Mo 2 C MXene regulated the coordination environment of Ru, forming electron-rich Mo 2 C MXene and electron-deficient Ru sites. And excellent catalytic activity is benefiting from the enhanced interaction between Mo 2 C MXene and Ru nanoparticles, promoting the effective activation and dissociation of the reactants, which resulted in the improvement of the performance of AB hydrolysis. This work offers an innovative approach to synthesize efficient AB hydrolysis catalysts for hydrogen production.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
ACS ES&T Engineering
·
2024
·
IF 7.4
Lan-Ying Liu,Min-Hua Cui,Shi-Ming Niu,Xue-Dong Zhang,Xin-Hui Li,Wo-Long Wang,He Liu,Guo-Shuai Liu,Ai-Jie Wang
In this study, we synthesized a phosphorus-coordinated Pd@MXene catalyst to address the drawbacks associated with high noble metal usage, susceptibility to poisoning, and stability issues in the electrocatalytic hydrodehalogenation (EHDC) of recalcitrant halogenated pollutants. The phosphorus-coordinated Pd@MXene exhibited an EHDC performance comparable to that of the benchmark electrode (Pd@MX/CC) when tested on the model pollutant diclofenac (DCF). Notably, the phosphorus-coordinated Pd electrode demonstrated an 80% reduction in Pd usage and a 3.9-fold increase in Pd utilization efficiency. This improved performance was consistent across a wide range of pH values (pH 3, 7, and 11) and was sustained over 10 reaction cycles for the removal of DCF. Furthermore, the enhanced catalytic activity of the phosphorus-coordinated Pd electrode was achieved in the EHDC of various halogenated compounds. Importantly, the electrode exhibited a favorable tolerance to inorganic ions during the EHDC process. Density functional theory (DFT) calculations provided insights into the electronic configuration regulation of phosphorus-coordinated Pd@MXene, optimizing binding energies for H* and dechlorinated intermediates. The reported promotion effect of halogenated pollutants degradation by the phosphorus-coordination approach offers new insights into efficient EHDC systems toward water purification.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 12
·126503
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IF 3.1
Tinghua Li,Shuai Kang,Fan Zhang,Xiong Sheng,Shoubo Li,Wenqiang Lu,Donglai Zhu,Zhiqiang Li
The two-electron oxygen reduction reaction (ORR) using an electrochemical method is considered a viable green technology for generating H2O2. Platinum group metals demonstrate excellent H2O2 generation performance due to their superior ORR activity and stability. However, the high cost of these electrocatalysts is a significant barrier to the widespread adoption of this technology, prompting research into non-precious metal catalysts as alternatives. In this work, Co3O4 nanoparticles with sized from 5 to 10 nm were synthesized on MXene sheets. Compared with Co3O4/C and MXene, the results indicated that Co3O4/MXene exhibited the best electrochemical performances, with an electron transfer number of ∼3.1 during oxygen reduction and an H2O2 selectivity of ∼47%. Co3O4/MXene also demonstrated great stability. After 5000 cycles, the H2O2 selectivity and electron transfer number remained at 50% and 3.0, respectively. After 12 h of continuous testing, Co3O4/MXene exhibited a high Faraday efficiency of 50% and H2O2 yield of 0.14 mol h−1 g−1, with H2O2 selectivity increasing to 68.7% and an electron transfer number of 2.6. The excellent electrochemistry is attributed to the synergistic effect between MXene and Co3O4. This study provides valuable insights into non-precious metal electrocatalysts for H2O2 generation.
研究领域:
材料科学
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催化化学
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环境科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Lan-Ying Liu,Min-Hua Cui,John Justo Ambuchi,Shi-Ming Niu,Xin-Hui Li,Wo-Long Wang,He Liu,Guo-Shuai Liu,Ai-Jie Wang
Electrocatalytic hydrodechlorination (EHDC) is a promising approach to safely remove halogenated emerging contaminants (HECs) pollutants. However, sluggish production dynamics of adsorbed atomic H (H* ads ) limit the applicability of this green process. In this study, bimetallic Pd–Cu@MXene catalysts were synthesized to achieve highly efficient removal of HECs. The alloy electrode (Pd–Cu@MX/CC) exhibited better EHDC performance in comparison to Pd@MX/CC electrode, resulting in diclofenac degradation efficiency of 93.3 ± 0.1%. The characterization analysis revealed that the Pd 0 /Pd II ratio decreased by forming bimetallic Pd–Cu alloy. Density functional theory calculations further demonstrated the electronic configuration modulation of the Pd–Cu@MXene catalysts, optimizing binging energies for H* and thereby facilitating H* ads production and tuning the reduction capability of H* ads . Noteably, the amounts and reduction potential of H* ads for Pd–Cu@MXene catalysts were 1.5 times higher and 0.37 eV lower than those observed for the mono Pd electrode. Hence, the introduction of Cu into the Pd catalyst optimized the dynamics of H* ads production, thereby conferring significant advantages to EHDC reactions. This augmentation was underscored by the successful application of the alloy catalysts supported by MXene in EHDC experiments involving other HECs, which represented a new paradigm for EHDC for efficient recalcitrant pollutant removal by H* ads .
研究领域:
环境科学
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材料科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Xinqi Zhang,Bingxin Wang,Dawu Shu,Wanxin Li,Fangfang An,yueyong Dong
Dyeing wastewater, a common type of wastewater in the textile industry, has a complex composition, deep color, and poor degradability. In this work, hydrothermal method was employed to synthesize Ni@MXene catalysts, and their performance in the Ni@MXene/PMS (peroxymonosulfate) system was investigated. A mixed system containing 7.5 g/L PMS and 0.2 g/L Ni@MXene was stirred for 60 min at 25 °C and pH 6, achieving a degradation percentage of 93.66%, ‧OH are the primary active species in this catalytic system, and the anion has minimal interference with the degradation process. The degradation percentage of the Ni@MXene catalyst can still reach 88.23 % after 3 times of recycling, and the degraded dyeing wastewater can be used for dyeing cotton fabrics. In conclusion, the catalyst demonstrates exhibits significant potential for dye degradation and wastewater recycling, providing valuable insights for energy conservation and emission reduction.
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产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 33
·2204192
·
IF 17.521
Jiongwei Shan,Wei Wang,Bing Zhang,Xinying Wang,Weiliang Zhou,Liguo Yue,Yunyong Li
Designing dense thick sulfur cathodes to gain high-volumetric/areal-capacity lithium–sulfur batteries (LSBs) in lean electrolytes is extremely desired. Nevertheless, the severe Li 2 S clogging and unclear mechanism seriously hinder its development. Herein, an integrated strategy is developed to manipulate Li 2 S redox kinetics of CoP/MXene catalyst via electron-donor Cu doping. Meanwhile a dense S/Cu 0.1 Co 0.9 P/MXene cathode (density = 1.95 g cm −3 ) is constructed, which presents a large volumetric capacity of 1664 Ah L −1 (routine electrolyte) and a high areal capacity of ≈8.3 mAh cm −2 (lean electrolyte of 5.0 µL mg s −1 ) at 0.1 C. Systematical thermodynamics, kinetics, and theoretical simulation confirm that electron-donor Cu doping induces the charge accumulation of Co atoms to form more chemical bonding with polysulfides, whereas weakens Co S bonding energy and generates abundant lattice vacancies and active sites to facilitate the diffusion and catalysis of polysulfides/Li 2 S on electrocatalyst surface, thereby decreasing the diffusion energy barrier and activation energy of Li 2 S nucleation and dissolution, boosting Li 2 S redox kinetics, and inhibiting shuttling in the dense thick sulfur cathode. This work deeply understands the atomic-level manipulation mechanism of Li 2 S redox kinetics and provides dependable principles for designing high-volumetric-energy-density, lean-electrolyte LSBs through integrating bidirectional electro-catalysts with manipulated Li 2 S redox and dense-sulfur engineering.
研究领域:
材料化学
·
电化学
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能源存储
·
纳米催化
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固态离子学
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先进电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2024
·
IF 5.6
Zheng Bo,Mengyu Cao,Yaolin Wang,Jianhua Yan,Kefa Cen,Xin Tu
Plasma catalytic CO 2 hydrogenation has emerged as a promising approach for converting CO 2 into valuable chemicals such as CO, offering a potential solution to mitigate greenhouse gas emissions. In this study, we investigate the synergistic effect between plasma and a Cu/Ti 3 C 2 T x MXene catalyst for CO 2 hydrogenation via the reverse water gas shift (RWGS) reaction in a dielectric barrier discharge (DBD) reactor. Our findings reveal a significant enhancement in CO 2 conversion (33.1%) and CO yield (31.9%) when using the Cu/Ti 3 C 2 T x catalyst compared to plasma alone or with a Ti 3 C 2 T x foam. Plasma treatment creates unsaturated Ti sites on the Ti 3 C 2 T x surface, dramatically improving CO 2 adsorption and activation, while Cu nanoparticles significantly enhances the activation and dissociation of H 2 molecules on the catalyst surface. These surface adsorbed hydrogen species readily hydrogenate adsorbed CO 2 molecules through the Langmuir-Hinshelwood mechanism. Furthermore, these surface hydrogen species can also participate in the conversion of gas-phase CO 2 molecules through the Eley-Rideal pathway. This work sheds light on the synergistic plasma catalytic mechanism and provide insights for optimizing CO 2 hydrogenation processes using MXene catalysts.
研究领域:
化学工程
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催化
·
环境科学
·
等离子体化学
✓ 已验证
产品关联
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2023
·Vol. 120
·期 49
·e2306777120
·
IF 11.1
Baoning Sha,Shengzhuo Zhao,Minling Gu,Dion Khodagholy,Liping Wang,Guo-Qiang Bi,Zhanhong Du
Peripheral neural interfaces, potent in modulating local and systemic immune responses for disease treatment, face significant challenges due to the peripheral nerves’ broad distribution in tissues like the fascia, periosteum, and skin. The incongruity between static electronic components and the dynamic, complex organization of the peripheral nervous system often leads to interface failure, stalling circuit research and clinical applications. To overcome these, we developed a self-assembling, tissue-adaptive electrode composed of a single-component cocktail nanosheet colloid, including dopants, conducting polymers, stabilizers, and an MXene catalyst. Delivered via a jet injector to designated nerve terminals, this assembly utilizes reactive oxygen species to catalytically dope poly (3,4-ethylenedioxythiophene), enhancing π–π interactions between nanosheets, and yielding a conductive, biodegradable interface. This interface effectively regulates local immune activity and promotes sensory and motor nerve functional restoration in nerve-injured mice, while engaging the vagal–adrenal axis in freely moving mice, eliciting catecholamine neurotransmitter release, and suppressing systemic cytokine storms. This innovative strategy specifically targets nerve substructures, bolstering local and systemic immune modulation, and paving the way for the development of self-adaptive dynamic neural interfaces.
研究领域:
神经科学
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生物医学工程
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免疫学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
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