A novel nanowire-structured polypyrrole-cobalt composite, PPy-CTAB-Co, is successfully synthesized with a surfactant of cetyltrimethylammounium bromide (CTAB). As an electro-catalyst towards oxygen reduction reaction (ORR) in alkaline media, this PPy-CTAB-Co demonstrates a superior ORR performance when compared to that of granular PPy-Co catalyst and also a much better durability than the commercial 20 wt% Pt/C catalyst. Physiochemical characterization indicates that the enhanced ORR performance of the nanowire PPy-CTAB-Co can be attributed to the high quantity of Co-pyridinic-N groups as ORR active sites and its large specific surface area which allows to expose more active sites for facilitating oxygen reduction reaction. It is expected this PPy-CTAB-Co would be a good candidate for alkaline fuel cell cathode catalyst.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4748222 | PMC |
| http://dx.doi.org/10.1038/srep20005 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Ce1-xMnxVO4 with Improved Activity for Low-Temperature Catalytic Reduction of NO with NH3.
Chem Asian J
January 2025
Fudan University, Department of Environmental Science and Engineering, Shanghai Handan Road 220, 200433, Shanghai, CHINA.
Novel Ce1-xMnxVO4 catalysts prepared via modified hydrothermal synthesis were used in selective catalytic reduction of NO using NH3 (NH3-SCR). The Ce1-xMnxVO4 catalysts displayed optimum NO removal efficiency at 250 oC. Physicochemical properties including crystal type, morphology, particle size, elemental composition, BET surface area, chemical bond, and valence state were studied by XRD, TEM, EDS, N2 adsorption-desorption, Raman spectroscopy, and XPS.
View Article and Find Full Text PDFSimultaneous aerobic and anaerobic respiration in hot spring chemolithotrophic bacteria.
Nat Commun
January 2025
Department of Microbiology and Cell Biology, Montana State University, Bozeman, MT, USA.
Aerobic and anaerobic organisms and their functions are spatially or temporally decoupled at scales ranging from individual cells to ecosystems and from minutes to hours. This is due to competition for energy substrates and/or biochemical incompatibility with oxygen (O). Here we report a chemolithotrophic Aquificales bacterium, Hydrogenobacter, isolated from a circumneutral hot spring in Yellowstone National Park (YNP) capable of simultaneous aerobic and anaerobic respiration when provided with hydrogen (H), elemental sulfur (S), and O.
View Article and Find Full Text PDFInsight into enhanced tetracycline photodegradation by hematite/biochar composites: Roles of charge transfer, biochar-derived dissolved organic matter and persistent free radicals.
Bioresour Technol
January 2025
National&Local Joint Engineering Research Center of Metrology Instrument and System, College of Quality and Technical Supervision, Hebei University, Baoding 071002, China. Electronic address:
The combination of hematite and biochar significantly accelerated tetracycline (TC) removal under visible light irradiation. The k of TC removal with Hem/BC-5 reached 0.103 min, 3.
View Article and Find Full Text PDFQuantifying the sources and health risks of groundwater nitrate via dual NO isotopes and Monte Carlo simulations in a developed planting-breeding area.
Ecotoxicol Environ Saf
January 2025
College of Resources and Environmental Sciences, Henan Agricultural University, Zhengzhou 450046, China. Electronic address:
Nitrate (NO) pollution in groundwater is a worldwide environmental issue, particularly in developed planting-breeding areas where there is a substantial presence of nitrogen-related sources. Here, we explored the key sources and potential health risks of NO in a typical planting-breeding area in the North China Plain based on dual stable isotopes and Monte Carlo simulations. The analysis results revealed that the NO concentration ranged from 0.
View Article and Find Full Text PDFGlobal transcriptome profiling of ST09 treated breast cancer cells identifies miR-197-5p/GPX3 antioxidant axis as a regulator of tumorigenesis.
Int Immunopharmacol
January 2025
Institute of Bioinformatics and Applied Biotechnology, Electronic City Phase 1, Bangalore 560100 India. Electronic address:
ROS (Reactive Oxygen Species) has a dual role in tumorigenesis. Some cancers have high ROS conditions, and others have low ROS. TNBC thrives on high ROS compared to other Breast Cancer subtypes.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!