Article
Chemistry, Physical
Weitao Gao, Qinan Yin, Xun Zhang, Chuang Zhang, Yijie Lei, Cheng Wang
Summary: The study introduces a novel dissymmetric membrane electrode assembly (MEA) with a graded pore gas diffusion anode and an electrospun cathode catalyst layer (CCL), which effectively improve the performance and Pt utilization of fuel cells while reducing Pt consumption.
JOURNAL OF POWER SOURCES
(2022)
Article
Electrochemistry
Ariane Dasque, Marie Gressier, Marie-Joelle Menu, Pierre-Louis Taberna
Summary: In this work, pH conditions during chromium electrodeposition were investigated using a home-made pH microsensor and scanning electrochemical microscopy (SECM). The results are promising and will enable further development in understanding chromium electrodeposition.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Yaosheng Liu, Yongxing Diao, Guangxing Hu, Yuyan Zhao, Yan Shi, Hongda Wang, Zhuang Li
Summary: In this study, the renewal methods of antimony-based sensors were proposed by physical polishing and electro-chemical cathode reduction. The pH response sensitivity of the sensor increased after polishing, and further improvement was achieved through electro-chemical cathode reduction. The reasons for the sensor's deterioration and renewable mechanisms were analyzed, and the renewable effect of electro-chemical cathode reduction was evaluated for long-term monitoring.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Mohammad Saleh Ali Akbari, Subhajit Nandy, Keun Hwa Chae, Rahman Bikas, Anna Kozakiewicz-Piekarz, Mohammad Mahdi Najafpour
Summary: Recently, there has been extensive research on copper(II) complexes as catalysts for the oxygen-evolution reaction. This study reports new findings on the oxygen-evolution reaction in the presence of a Cu(II) complex with a 6,6'-dihydroxy-2,2'-bipyridine ligand. Various techniques such as SEM, EDX, XRD, Raman spectroscopy, in situ visible microscopy, in situ visible spectroelectrochemistry, XAS, and electrochemistry were used to investigate the hypothesis that a film formed on the electrode's surface in the presence of this complex promotes the production of Cu(hydr)oxide, which can serve as a catalyst for OER. The formation of the film stabilizes Cu(hydr)oxide and enhances OER activity.
Article
Chemistry, Physical
Natalia Festinger, Aneta Kisielewska, Barbara Burnat, Katarzyna Ranoszek-Soliwoda, Jaroslaw Grobelny, Kamila Koszelska, Dariusz Guziejewski, Sylwia Smarzewska
Summary: The present study investigates the impact of two different oxygen content graphene oxides on the electrochemical and structural properties of noble metal disk electrodes. The chemistry and structural properties of the modifier layers were analyzed using various techniques, and comparative electrochemical studies were conducted using cyclic voltammetry.
Article
Chemistry, Multidisciplinary
Sheza Muqaddas, Mohsin Javed, Sohail Nadeem, Muhammad Adeel Asghar, Ali Haider, Muhammad Ahmad, Ahmad Raza Ashraf, Arif Nazir, Munawar Iqbal, Norah Alwadai, Azhar Ahmad, Abid Ali
Summary: Electrochemical sensors are in high demand for real-time monitoring of health parameters. A flexible and wearable glucose sensor composed of copper oxide-modified carbon nanotube fibers (CuO@CNTFs) has been developed, with excellent catalytic activity. The unique structure of CNT fibers provides efficient conductivity and mechanical strength, surpassing other fibrous materials. The deposition of CuO nanoparticles onto the fiber surface further enhances sensor performance. The CuO@CNTFs exhibit high sensitivity, low detection limit, wide linear range, and superior electrode performance, making them a promising solution for glucose sensing.
Article
Chemistry, Analytical
Wei Shu, Jin Yu, Zhuohang Li, Xiaoqian Sun, Yunpeng Wang, Yulong Wu, Jie Qin, Yu Zhang, Haibin Xiao, Xiaoling Zhang
Summary: In this study, a novel mitochondria-targeted fluorescent probe SNRF was developed for monitoring mitochondrial pH changes. SNRF showed excellent molecular charge transfer performance and could accurately track pH variations during rapamycin-induced mitophagy.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
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, Multidisciplinary
Tianyu Gao, Jinwei Lin, Leilei Xu, Jianguo Guan
Summary: In living bodies, pH values can act as an important indicator for future intelligent biomedicine microsystems. In this study, flask-like carbonaceous nanomotors were developed, which can exhibit self-adaptive behavior to specific physiological pH and be controlled for targeted therapy of tumors.
Article
Chemistry, Multidisciplinary
Vandana Nagal, Virendra Kumar, Marya Khan, Suliman Yousef AlOmar, Nirmalya Tripathy, Kedar Singh, Ajit Khosla, Naushad Ahmad, Aurangzeb Khurram Hafiz, Rafiq Ahmad
Summary: This study demonstrates the fabrication of a highly sensitive uric acid biosensor using solvent-assisted synthesis of zinc oxide nanoparticles and hydrothermal growth of vertically-arranged zinc oxide nanorods. The biosensor shows good selectivity, high sensitivity, and enhanced shelf-life, attributed to the vertically-arranged nanorods immobilizing a large amount of enzyme. This approach can be extended to fabricate different zinc oxide nanorod-based chemical/biosensing devices.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Analytical
Saad S. M. Hassan, Mahmoud Abdelwahab Fathy, Ibrahim Moussa, M. Obaida, Ayman H. Kamel
Summary: A novel thin film of bismuth oxide (Bi2O3) was prepared on a fluorine doped tin oxide glass substrate (FTO) using a spray pyrolysis technique, and used as a pH sensing membrane. The film exhibited a porous structure, high roughness surface, and nano cracks. It showed excellent performance in monitoring a wide range of pH in aqueous solutions.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Ye Xi, Zhejun Guo, Longchun Wang, Qingda Xu, Tao Ruan, Jingquan Liu
Summary: This paper presents a method for preparing iridium oxide pH microelectrodes based on the sputter deposition method, with optimized sputtering parameters. The microelectrodes exhibit good performance in the pH range of 1.00-13.00, showing near-Nernstian pH response, high stability, and fast response.
Article
Chemistry, Multidisciplinary
Jongin Cha, Jangyup Son, Jongill Hong
Summary: This study investigates the impact of bottom-electrode contact on graphene devices and demonstrates the ability to achieve extremely low contact resistivity. The enhanced density of states (DOS) at the bottom-electrode contact is the key factor for achieving low resistivity.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Biophysics
Pengyu Zhu, Muhammad Rizwan Younis, Guiqi Ma, Qianting Zhang, Ruibing An, Kaiqi Wang, Jian Dong
Summary: Dendritic polymer-platinum conjugates (G5-PEG-Pt) were designed as pH-responsive nanovesicles for target delivery of platinum drugs. The G5-PEG-Pt exhibited a well-defined structure, intrinsic fluorescence, and acid-responsive drug release. They were able to enter cancer cells and achieve comparable cytotoxicity to free cisplatin. Furthermore, the nanovesicles showed enhanced tumor platinum uptake compared to free cisplatin, potentially improving the therapeutic efficacy of platinum drugs.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Engineering, Biomedical
Shaghayegh Aslanzadeh, Ava Hedayatipour, Matthew Smalley, Nicole McFarlane
Summary: This paper presents a combined pH and impedance sensing system suitable for portable measurements, utilizing voltage clamp topology and current/voltage comparators for pH and impedance sensors. The system is experimentally verified with on-chip electrodes for pH and characterized with discrete electronic components for impedance measurements. The portable system is implemented with low power consumption and small area, suitable for water quality monitoring applications.
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
(2021)