Article
Chemistry, Physical
Natthapong Pongpichayakul, Suwaphid Themsirimongkon, Suphitsara Maturost, Kanlayawat Wangkawong, Li Fang, Burapat Inceesungvorn, Paralee Waenkaew, Surin Saipanya
Summary: Catalyst composites based on carbon loaded with Pt and CeO2 have been successfully prepared for methanol oxidation in direct-methanol fuel cells (DMFCs), showing enhanced catalytic performance and reduced CO poisoning by modifying carbon surfaces with CeO2 and Pt nanoparticles.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Enrique A. Paredes-Salazar, Alfredo Calderon-Cardenas, Hamilton Varela
Summary: In this study, a microkinetic model was proposed for predicting the methanol electro-oxidation reaction on polycrystalline platinum. By comparing with experimental data, the model was able to successfully simulate the observed non-linear dynamics under galvanostatic conditions and reasonably predict the voltammetric profile. The microkinetic approach used in this research can be extrapolated to other electrocatalytic reactions, allowing for complementarity between experimental and computational simulations.
Article
Chemistry, Multidisciplinary
Jiahui Liang, Heyun Cheng, Bolin Zhao, Qiong Hu, Zihao Xing, Yuwei Zhang, Li Niu
Summary: Fluorescent carbon dots are used to regulate the behavior of PtRu catalysts, resulting in a significant increase in catalytic activity for methanol electrooxidation.
Article
Chemistry, Physical
Jun Zhang, Lin Hu, Ying Qian, Xiaoyu Li, Zixun Liu, Jiayi Ouyang, Zhehan Yang, Xianming Zhang, Guangming Jiang
Summary: Researchers have developed a catalyst with high activity and stability in methanol oxidation reaction by synthesizing intermetallic nanoparticles.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Dalila S. Mekazni, Rosa M. Aran-Ais, Adolfo Ferre-Vilaplana, Enrique Herrero
Summary: The mechanism of methanol electro-oxidation on platinum in water requires the presence of adsorbed hydroxide ions, which has crucial implications for optimizing fuel cells using alcohols as fuel. This unexpected observation represents a paradigm shift in understanding how alcohols are electro-oxidized on reference systems and has important implications for the search for better electrocatalysts.
Article
Chemistry, Physical
Jia-Jun Han, Ming-yu Yin
Summary: In this paper, hollow NiPt/C nanocrystals were prepared using the sacrificial template method, and the influence of capping agent content on the electrocatalytic methanol oxidation reaction (MOR) performance of the synthetic materials was explored. The electrochemical tests showed that the hollow binary catalyst prepared with a capping agent content of 50 mg had the highest electrochemical active area, and exhibited enhanced stability in acidic solution. The improved catalytic activity was attributed to the hollow structure, higher specific electrochemical surface area, and more abundant active sites.
Article
Materials Science, Multidisciplinary
Xiangjie Guo, Qi Wang, Haiyan He, Huajie Huang
Summary: In this study, a controllable and scalable method was proposed to construct ultrafine Pt nanocrystals supported by boron and nitrogen codoped carbon nanohorns (Pt/BN-CNH) as electrocatalysts for methanol oxidation reaction. The resulting Pt/BN-CNH catalysts exhibited high catalytic activity, reliable long-term stability, and strong antipoisoning capacity, surpassing conventional catalysts and showing great potential for next-generation DMFC devices.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
W. Zhao, F. Xie, M. Gan, L. Ma, Y. Zhang, X. Li, L. Wang, X. Hua
Summary: Efficient strategies for constructing durable and active Pt-based electrocatalysts for methanol oxidation reaction (MOR) are of great significance for the application of direct methanol fuel cells (DMFCs). This study reports a facile pyrolysis procedure to fabricate carbon layer wrapped PtFeCo alloy nanoparticles supported on nitrogen-doped carbon nanotubes (NCNT). The nitrogen-doped carbon support is highly graphitized, and the PtFeCo particles are firmly wrapped by the graphitized carbon, leading to improved durability and activity of the catalyst.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Physical
Tzu Hsuan Chiang, Jia-Wei Hsu
Summary: This study investigates the use of strontium molybdate for improving the electrochemical performance of direct methanol fuel cells. Strontium molybdate helps remove CO-like intermediates and accelerate their conversion to CO2, enhancing the methanol electro-oxidation and CO tolerance in DMFCs.
Article
Chemistry, Physical
Wenqing Yao, Xian Jiang, Meng Li, Yulian Li, Yuanyuan Liu, Xun Zhan, Gengtao Fu, Yawen Tang
Summary: This study introduces a novel and efficient Pt-Ag DSNCs electrocatalyst with a double-shelled structure and optimized bimetallic chemical composition. The Pt-Ag DSNCs exhibit superior stability and specific activity for the electro-oxidation of methanol, showing potential for application in direct methanol fuel cells.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Mingmei Zhang, Zixiang Song, Zhuokai Wang, An Wang, Guisheng Zhu, Shouyan Shao
Summary: The interaction of multi-active components in alcohol fuel cells can effectively maximize catalytic ability. By loading platinum quantum dots onto nitrogen-doped carbon nanotubes, a quaternary hybrid with Co-MnO is formed to significantly enhance catalytic activity for alcohol oxidation, showing excellent methanol and ethanol oxidation mass current densities. The strong electronic synergistic effect between Co-MnO and Pt quantum dots also improves the CO anti-poisoning ability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Green & Sustainable Science & Technology
H. Seshagiri Rao, Pernapati Nagaraja, Shuchi Sharma, G. Ranga Rao, Ponniah Justin
Summary: This study investigates the effect of different crystal planes of molybdenum oxide (MoO3) on the efficiency of platinum (Pt) catalysts. The results show that crystal plane-dependent behaviors of MoO3-Pt catalysts influence catalytic activity, stability, and antipoisoning effects. Notably, the Pt-MoO3 catalyst with enhanced crystal growth of MoO3 along the {k00} plane exhibits superior promotion of methanol oxidation and improved antipoisoning performance, making it a promising candidate for efficient and cost-effective fuel cell applications.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Chemistry, Physical
Hongsen Wang, Hector D. Abruna
Summary: The electro-oxidation of methanol and formic acid on Pt was studied using a spectroscopic platform combining DEMS and ATR-FTIR spectroscopy. The results showed that formic acid adsorption suppressed the adsorption of formate and water, while methanol oxidation also generated non-volatile soluble intermediates. Furthermore, Pb modification significantly enhanced the direct pathway of formic acid oxidation.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Engineering, Environmental
Olabode T. Ajenifujah, Amideddin Nouralishahi, Sarah Carl, Shawn C. Eady, Zhao Jiang, Levi T. Thompson
Summary: Electrocatalysts based on Pt supported early transition metal carbides have shown promise for methanol oxidation reaction (MOR). A study on these electrocatalysts revealed that Pt/NbC exhibited the highest specific activity and a moderate binding energy of H and CO on the electrocatalyst surfaces is favorable for high activity during MOR.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Wufan Zhao, Alain Dufresne, Ante Li, Hang An, Chenxi Shen, Peng Yu, Xueliang Jiang, Runguo Wang, Liqun Zhang
Summary: Rubber is an important material that is susceptible to oxidative degradation. The study found that crude lignin-based carbon dots can significantly improve the antioxidative performance of rubber, even surpassing purified lignin-based carbon dots. This research provides inspiration for the development of low-cost, highly effective antioxidants from plant biomass waste.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Wenjing Tan, Chunmei Gao, Shifeng Ji, Yunqing Xing, Yi Guo, Baogui Liang
Summary: Membrane separation technology is widely used in wastewater treatment due to its cost-effectiveness and productivity. However, organic membrane fouling caused by humic acid is a major barrier to its further development. This study successfully addressed this issue through the production of composite materials and self-cleaning membranes, providing beneficial strategies and solutions for membrane contamination problems.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Qichang Peng, Qingdong Ruan, Bin Wang, Jinyuan Liu, Chao Huang, Xingwang Zhu, Dan Li, Liangliang Liu, Yinchuan Wang, Xiaolin Zhang, Jia Yan, Paul K. Chu, Hui Xu
Summary: The escalating issue of water pollution has led to significant attention in the field of photocatalysis. In this study, OV-Sb2WO6-X photocatalyst with oxygen vacancies was synthesized, which exhibited enhanced charge separation efficiency and improved photocatalytic activity. The introduction of oxygen vacancies was successfully controlled and characterized, and the modified photocatalyst showed superior degradation efficiency for dye wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wangcheng Zhang, Cunchuan Zheng, Hu Xie, Weichao Du
Summary: By using a specific curing agent ETB, the problem of dispersion and stability for oily epoxy resin in cement slurry system has been successfully solved. The application of the emulsified curing agent ETB in oilfield cement slurry system shows good rheological performance, resistance to high temperature and high pressure water loss, and corrosion resistance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
O. I. Krivonos, A. Babenko, O. B. Belskaya
Summary: This study synthesized biochar based on sapropel and investigated the effects of chemical modification on its textural characteristics, acid-base properties, and adsorption properties. The results showed that the chemical modification increased the fraction of micropores, specific surface area, and changed the surface properties of biochar. The experiment also revealed that biochar pretreated with alkali exhibited the maximum adsorption capacity for copper ions. A conceptual model identifying the mechanisms of copper adsorption on sapropel-based biosorbent was proposed.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
H. Lachhab, N. Benzbiria, A. Titi, S. Echihi, M. E. Belghiti, Y. Karzazi, A. Zarrouk, R. Touzani, C. Jama, F. Bentiss
Summary: The corrosion inhibitory potency of two new pyrimidine-pyrazole derivatives, PPA and PPC, was evaluated for mild steel in 1 M HCl. The results showed enhanced inhibition activities with increased concentration, reaching maximal values of 91.15% and 92.39% for PPA and PPC, respectively. However, the mitigation potency decreased with increasing temperature. SEM and XPS analysis revealed that PPA and PPC adsorbed on the mild steel surface, forming a shielding layer that prevented the dissolution of the steel in the acidic solution.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Shanmugapriya Sivalingam, D. Jeya Sundara Sharmila, Goutham Golla, Lakshmanan Arunachalam, Tarunendu Singh, G. Karthikeyan, A. Shanthi, Kannan Malaichamy
Summary: This study aims to develop a nano-biofungicide comprising of volatile essential oil molecules to enhance its efficacy in the field of agriculture through easily scalable green synthesis technique. The nano biofungicide was prepared through one pot hot melt ultrasonication technique with easy water dispersibility and long term stability. The physico-chemical analysis revealed that, nano bio-fungicides were amorphous sphere-shaped nanoparticles with low melting point. The encapsulation efficiency of major components of essential oil was determined, and it was found that they followed Higuchi model of release kinetics. The essential oil loaded nanostructured lipid carrier showed significantly higher mycelial growth inhibition compared to pure essential oil, indicating enhanced bio-efficacy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yinlong Li, Yingqing Zhan, Yiwen Chen, Hongshan Jia, Ximin Chen, Fei Zhu, Xulin Yang
Summary: In this study, ZnO quantum dots decorated MXene nanosheets were used as a functional filler for waterborne epoxy coating. The improved dispersion and synergy of ZnO QDs and MXene nanosheets enhanced the anticorrosion performance of the coating.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Fucheng Guan, Jing Tao, Qiang Yao, Zheng Li, Yihang Zhang, Shi Feng, Jianbin Sun, Qiang Yang, Xuecui Song, Jing Guo, Yuanfa Liu
Summary: This paper presents a method for preparing adsorbent materials based on biomass that can efficiently adsorb methylene blue. The experimental results show that the material has a hierarchical structure, high adsorption capacity, and reusability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Pengfei Hu, Zuli Mo, Weiliang Wang, Chengzhe Li, Zhaojia Guo, Guanqing Lin, Zhimin Guo
Summary: This study developed a novel in-situ particle vision and measurement (PVM) system to investigate heterocoagulation between coarse and fine particles in mineral processing. The experimental results showed that the degree of heterocoagulation decreased with increasing pH and stirring speed. Furthermore, under certain hydrodynamic conditions, coal particles were more distributed at the rear of the glass bead.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Tanveer ul Haq Zia, Anwar ul Haq Ali Shah, Behisht Ara, Kashif Gul
Summary: A label-free immunosensor for detection of hepatitis C core antigen was fabricated using a ternary nanocomposite based on polypyrrole, silver doped zinc oxide, and exfoliated graphene. The immunosensor demonstrated low detection limit, high selectivity, and stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoyan Feng, Jiachen Li, Lijun Liang, Linli Zhu, Sa Liu, Li Ren
Summary: In this study, polystyrene divinylbenzene microspheres were surface-modified by poly(carboxybetaine methacrylate) to develop an efficient hemoperfusion adsorbent for the removal of protein-bound toxins. The modified microspheres showed increased adsorption capacity and better biocompatibility, making them promising for clinical hemoperfusion therapy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoye Bi, Dong Xue, Yunpeng Wang, Chencheng Lv, Zexiong Li, Tao Zhao
Summary: This research aimed to develop a durable and formaldehyde-free flame retardant treatment for cotton fabrics. The results demonstrated successful grafting of phosphorous acid (PA) onto cotton fabrics, leading to enhanced flame resistance while maintaining the desired fabric characteristics.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Ruolin Wang, Wenjuan Sun, Haisheng Han, Dongping Tao
Summary: This study finds that Al-starch colloidal depressants can effectively inhibit the flotation of ultrafine calcite and chlorite, and increase the grade of valuable minerals. The chemisorption of Al-starch on mineral surface changes the functional group peaks and generates new O-Al functional groups.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wondimu K. Wakejo, Ali Maged, Beteley T. Meshesha, Joon W. Kang, Abayneh G. Demesa, Sandip Chakrabarti, Thallada Bhaskar, Ashok Kumar Gupta, Amit Bhatnagar
Summary: Simultaneously removing different pharmaceutical pollutants from wastewater is an important environmental issue, and the use of a system that can remove multiple contaminants at once is necessary. Functionalized biochar (FBC) has been found to be effective in simultaneously removing acetaminophen and ciprofloxacin and other pharmaceutical pollutants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yu Wang, Fengwen Yan, Jie Wu, Zhijun Huang, Liuting Song, Shunda Yuan
Summary: In this study, Cu single atoms are anchored on the external surface of g-C3N4 nanofibers to maximize atom utilization. This catalyst exhibits excellent Fenton-like catalytic activity and good stability due to the full utilization of Cu active sites.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)