INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
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IF 3.764
Zeqi Jin,Lan Wang,Tao Chen,Junmei Liang,Qicheng Zhang,Wenchao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
Designing hydrogen evolution reaction catalysts with high performance in alkaline conditions is important for reducing energy consumption during water electrolysis. This study reports an electrodeposition–calcination–electrodeposition strategy to construct the Ni–Mo–O/Ni4Mo nanointerface on an N-doped carbon support derived from polyaniline on carbon fiber paper. The N-doped carbon support not only stabilizes the metal/metal oxide nanointerface but also generates more active intrinsic sites and electrical conductivity via the metal–N interaction. The obtained Ni–Mo–O/Ni4Mo@NC displays a low overpotential of only 61 mV at a current density of 10 mA cm–2 for alkaline HER in 1 M KOH.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Guangyao Yang,Weiliang Peng,Zhipeng Chen,Shaobo Li,Qiying Han,Renzong Hu,Bin Yuan
Nickel–molybdenum–boron (Ni–Mo–B)-based catalysts with biphasic interfaces are highly advantageous in bifunctional electrocatalytic activity in alkaline water-splitting. However, it remains an ongoing challenge to obtain porous Ni–Mo alloy substrates that provide stable adhesion to catalysts, ensuring the long-term performance of bifunctional self-supporting electrodes at a high current density. Herein, a porous Ni–Mo alloy substrate was effectively obtained by a cost-effective dealloying process on a commercial Ni–Mo alloy with high-energy crystal planes. Subsequently, the Mo2NiB2/Ni3B bifunctional catalyst was in situ synthesized on this substrate via boriding heat treatment, resulting in outstanding catalytic activity and stability. Density functional theory (DFT) calculations reveal that the abundant biphasic interfaces and surface-reconstructed sites of the Mo2NiB2/Ni3B catalyst can decrease the energy barriers for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Thus, the designed self-supporting electrodes show bifunctional catalytic activity with overpotentials of 151 mV for HER and 260 mV for OER at a current density of 10 mA cm–2. Markedly, the assembled water electrolyzer can be driven up to 10 mA cm–2 at 1.64 V and maintain catalytic activity at a high current density of 1000 mA cm–2 for 100 h. The new strategy is expected to provide a low-cost scheme for designing self-supporting bifunctional electrodes with high activity and excellent stability and contribute to the development of hydrogen energy technology.
研究领域:
材料科学
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电化学
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能源技术
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产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
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2018
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IF 4.667
Guanhua Xing,Siyang Liu,Qingxin Guan,Wei Li
This paper focused on the isomerization and cracking of n -alkanes to synthesize bio-jet fuel. A series of SAPO-11 supports with different Si/Al molar ratio (0.2, 0.4, 0.6) were prepared, characterized, and evaluated by the hydroisomerization on hydrodeoxygenation product of castor oil. As a result, a Ni-Mo/SAPO-11(0.4) catalyst with hollow tubular structure and moderate acidic strength exhibited optimum conversion (97.2%) and jet fuel selectivity (81.6%) in the reaction. Subsequently, Ni-Mo/SAPO-11(0.4) was selected to carry out further experiments on studying the hydroisomerization and hydrocracking of long chain n -alkanes. The results show that increasing temperature may promote hydroisomerization and hydrocracking. Temperature is more favorable for the reaction with the length of the carbon chain decreasing, no matter conversion, hydrocracking degree or isomerization tendency. The product selectivity of different n -alkanes is associated with the carbon number. In reaction to n -C 18 , Ni-Mo/SAPO(0.4) surpassed the other two catalysts in the conversion and i/n ratio at 623 K which is the optimum temperature.
研究领域:
催化化学
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能源科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Yue Li,Peihua Li,Rufeng Tian,Xingzi Bian,Jian Wang,Rui Li,Wanggang Zhang,Jiancheng Wang,Yiming Liu
Photoelectrochemical (PEC) seawater splitting offers a sustainable route for hydrogen production; however, it is challenged by the corrosion and sluggish kinetics of photoanodes in chloride-rich electrolytes. To overcome this, we developed a bimetallic metal-organic framework (MOFs) structure with oxygen vacancies (O V ) on TiO 2 nanorods, denoted as (DA)Ni/Mo–MOFs@TiO 2 . This photoanode achieved a high photocurrent density of 2.21 mA·cm −2 and H 2 production rate of 36.07 μmol·cm −2 ·h −1 in real seawater. Notably, it undergoes in situ reconstruction during the oxygen evolution reaction (OER), forming catalytically active Ov–NiOOH accompanied by a protective MoO 4 2− layer. In situ Raman and X-ray photoelectron spectroscopy (XPS) directly revealed the reconstruction process and interfacial adsorption. Density functional theory (DFT) calculations further demonstrated that the reconstructed surface selectively stabilized *OH intermediates (E ad = −4.26 eV), thereby enhancing the OER selectivity and corrosion resistance. This system demonstrated exceptional stability, exhibiting minimal faradaic efficiency loss (1.2–2.3%) in high chloride ion environments (0.7–1 mol/L NaCl). This study provides a novel strategy for designing durable photoelectrodes via pre-catalyst reconstruction.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Yingying Xu,Xiangmei Meng,Tianhao Zou,Jianqiao Wang,Pengfei Xiao
Chloroquine phosphate (CQP) is a drug widely used in clinical anti malaria and treatment of novel coronavirus pneumonia. Meanwhile, it has persistence in water. This substance has become a new type of environmental pollution that requires urgent attention and effective remediation strategies. Therefore, in this study, nickel molybdenum layered double hydroxide (NixMoy-LDH) was coated on ZIF-67 through hydrothermal treatment and used as a catalyst to activate CaSO 3 for the degradation of CQP. Investigated the effects of catalyst ratio, initial pH, and coexisting substances in the system on the degradation of CQP. Under the optimal metal ratio synthesis conditions, NiMo4-LDH@ZIF-67/CaSO 3 achieved a 95.6% CQP degradation rate within 30 min, demonstrating excellent activity. Comprehensive characterization shows that the close interaction between ZIF-67 and NixMoy-LDH can improve the stability of the catalyst, accelerate the redox cycle of Ni ions, and enhance the activation of CaSO 3 . Quenching experiments, electron paramagnetic resonance, and competitive dynamics confirm that SO 4 •− , •OH and 1 O 2 , species contribute to the degradation process. By combining LC-MS and DFT calculations, the possible degradation pathways of CQP were analyzed, the main intermediates were identified, and the toxicity of the intermediates was evaluated. It is worth noting that after five cycles, the degradation rate of pollutants by the catalyst remained at 93%, proving that the catalyst has excellent stability. The catalyst has excellent reusability and effectiveness in various pollutants and different water bodies. This work emphasizes that the NiMo4-LDH@ZIF-67/CaSO 3 system is a promising pharmaceutical wastewater treatment technology.
✓ 已验证
DOI
高影响因子
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