Single-atom catalysts (SACs) have promising atomic utilization efficiency and catalytic activity, but their construction with a specific coordination mode remains challenging. This protocol describes the synthesis of a coordinated Fe-SAC@COF for boosted electrocatalytic oxygen evolution reaction (OER). We also detail the steps for single iron atoms confinement and characterization of the COF and Fe-SAC@COF with X-ray diffraction and transmission electron microscopy technique. For complete details on the use and execution of this protocol, please refer to Wang et al. (2022).
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http://dx.doi.org/10.1016/j.xpro.2022.101626 | DOI Listing |
Langmuir
January 2025
Department of Chemistry, Bharathiar University, Coimbatore 641 046, India.
Developing nonprecious metal-based electrocatalysts with exceptional activity and durability for water electrolysis remains a significant challenge. Herein, we report a highly efficient bifunctional electrocatalyst composed of sulfur-doped vanadium metal-organic frameworks (S@V-MOF) integrated with multiwalled carbon nanotubes (MWCNTs) to promote the synergistic effect between S@V-MOF and MWCNTs and modulate the electronic structure of the catalyst, which eventually enhanced its electrocatalytic performance. The S@V-MOF/MWCNT catalyst loaded at the Ni foam electrode exhibits remarkable activity for both the hydrogen evolution reaction (HER) in acidic media and oxygen evolution reaction (OER) in alkaline media, requiring overpotentials of 48 and 227 mV, respectively, to reach a current density of 10 mA cm.
View Article and Find Full Text PDFChem Commun (Camb)
January 2025
Department of Chemistry and Biochemistry, San Francisco State University, San Francisco, California 94132, USA.
The electrochemical oxidation of alcohol molecules has gained significance as a key anode reaction, offering an alternative to the oxygen evolution reaction (OER) for hydrogen (H) production and carbon dioxide (CO) reduction. The (photo)electrochemical oxidation of benzyl alcohol and its derivatives serves as an important model system, not only because benzyl alcohol oxidation is a critical industrial process, but also because it offers valuable insights into electrocatalytic biomass conversion. Tailoring this reaction through electrochemical and photoelectrochemical methods using heterogeneous noble and transition metal electrocatalysts presents a green approach and the potential for uncovering new reaction mechanisms.
View Article and Find Full Text PDFACS Nano
January 2025
College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, P. R. China.
Electrocatalytic CO-to-CO conversion with a high CO Faradaic efficiency (FE) at low overpotentials and industrial-level current densities is highly desirable but a huge challenge over non-noble metal catalysts. Herein, graphitic N-rich porous carbons supporting atomically dispersed nickel (NiN-O sites with an axial oxygen) were synthesized (denoted as O-Ni-N-GC) and applied as the cathode catalyst in a CORR flow cell. O-Ni-N-GC showed excellent selectivity with a FE over 92% at low overpotentials ranging from 17 to 60 mV, and over 99% at 80 mV.
View Article and Find Full Text PDFSmall
January 2025
Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
The preparation and modification of porous electrodes are an important component of the new generation electrochemical oxidation technology. Rapid preparation of porous electrodes can be easily achieved by synchronous oxygen bubble electrodeposition. However, according to the reaction mechanism of lead dioxide anodic electrodeposition, there is bound to be a competitive reaction of adsorbed hydroxyl radicals in the oxygen bubble template method, which means that synchronous OER impacts both the surface morphology and potentially the crystalline structure of the metal oxides.
View Article and Find Full Text PDFPhys Chem Chem Phys
January 2025
School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
Electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) is a promising alternative for oxygen evolution reactions. The search for efficient catalysts has been attracting increasing scientific attention. This work explores the performance of nitrogen-doped graphene-supported single-atom catalysts (M-NC SACs) for the reaction.
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