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Cation Migration-Induced Lattice Oxygen Oxidation in Spinel Oxide for Superior Oxygen Evolution Reaction.
Angew Chem Int Ed Engl
November 2024
School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
Activating the lattice oxygen can significantly improve the kinetics of oxygen evolution reaction (OER), however, it often results in reduced stability due to the bulk structure degradation. Here, we develop a spinel FeCoCrO with active lattice oxygen by high-throughput methods, achieving high OER activity and stability, superior to the benchmark IrO. The oxide exhibits an ultralow overpotential (190 mV at 10 mA cm) with outstanding stability for over 170 h at 100 mA cm.
View Article and Find Full Text PDFApplication of infrared spectroscopy to study carbon-deuterium kinetics and isotopic spectral shifts at the single-cell level.
Spectrochim Acta A Mol Biomol Spectrosc
February 2025
Centre for Metabolomics Research, Department of Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, United Kingdom. Electronic address:
Microbial communities play crucial roles in shaping natural ecosystems, impacting human well-being, and driving advancements in industrial biotechnology. However, associating specific metabolic functions with bacteria proves challenging due to the vast diversity of microorganisms within these communities. In the past decades stable isotope probing (SIP) approaches, coupled with vibrational spectroscopy, have emerged as a novel method for revealing microbial metabolic roles and interactions in complex communities.
View Article and Find Full Text PDFCarbonate-carbonate coupling on platinum surface promotes electrochemical water oxidation to hydrogen peroxide.
Nat Commun
October 2024
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, 211816, Nanjing, China.
Article Synopsis
- * In this study, researchers utilized in-situ Raman spectroscopy and differential electrochemical mass spectroscopy to discover that the main formation of HO occurs through the coupling of two CO intermediates, with 93% of HO produced this way.
- * They also demonstrated a flow cell setup that combines a commercial cathode catalyst for oxygen reduction with an anode, achieving a Faradaic efficiency of 150% for HO production at a cell voltage of 2.3V at 1 A/cm.
Dioxygenase Chemistry in Nucleophilic Aldehyde Deformylations Utilizing Dicopper O-Derived Peroxide Complexes.
J Am Chem Soc
August 2024
Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States.
The chemistry of copper-dioxygen complexes is relevant to copper enzymes in biology as well as in (ligand)Cu-O (or Cu-O) species utilized in oxidative transformations. For overall energy considerations, as applicable in chemical synthesis, it is beneficial to have an appropriate atom economy; both O-atoms of O are transferred to the product(s). However, examples of such dioxygenase-type chemistry are extremely rare or not well documented.
View Article and Find Full Text PDFFourier transform microwave spectroscopy of the 13C- and 18O-substituted tropolone. Proton tunneling effect for the isotopic species with the asymmetric potential wells.
J Chem Phys
June 2024
Department of Applied Chemistry, National Yang Ming Chiao Tung University, 1001 Ta-Hsueh Rd., Hsinchu 30093, Taiwan.
Fourier-transform microwave spectroscopy has been applied for the 13C/18O-substituted tropolone to observe tunneling-rotation transitions as well as pure rotational transitions. The tunneling-rotation transitions were observed between the 13C-4 and -6 forms as well as between 13C-3 and -7, between 13C-1 and -2, and between 18O-8 and -9 (we denote these tunneling pairs as 13C-46, etc., below) although they have an asymmetric tunneling potential due to the difference in the zero point energy (ZPE).
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