Photoelectrocatalytic water splitting to produce hydrogen has great potential for industrial applications. Herein, Pt/CN-NVs was prepared as a photoanode, its photoelectrocatalytic hydrogen generation rate reached 717.82 μmol g h under 300 W Xenon lamp illumination when the bias voltage was 1.23 V ( RHE), and the photocurrent density remained stable for 24 h. This work demonstrated that the CN-based photocatalysts have good photostability and prospects for industrial applications.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1039/d4cc05545d | DOI Listing |
Precis Chem
December 2024
State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
The interfacial proton transfer (PT) reaction on the metal oxide surface is an important step in many chemical processes including photoelectrocatalytic water splitting, dehydrogenation, and hydrogen storage. The investigation of the PT process, in terms of thermodynamics and kinetics, has received considerable attention, but the individual free energy barriers and solvent effects for different PT pathways on rutile oxide are still lacking. Here, by applying a combination of ab initio and deep potential molecular dynamics methods, we have studied interfacial PT mechanisms by selecting the rutile SnO(110)/HO interface as an example of an oxide with the characteristic of frequently interfacial PT processes.
View Article and Find Full Text PDFSmall
December 2024
Department of Fiber Convergence Material Engineering, Dankook University, Gyeonggi-Do, 16890, Republic of Korea.
Approximately 2 billion people still lack access to clean drinking water. Extensive efforts are underway to develop semiconductor photocatalysts for water disinfection and environmental remediation, but conventional liquid-solid diphase interfacial photocatalysts face challenges like low diffusion coefficients and limited solubility of dissolved oxygen. This study introduces freestanding copper oxide fluffy pine needle structures (CO-FPNs) with tunable water pollutants-gas-solid (WGS) triple-phase interfaces that enhance oxygen enrichment and reactive oxygen species (ROS) production.
View Article and Find Full Text PDFAcc Chem Res
December 2024
Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, United States.
ConspectusThe surface of a catalyst is crucial for understanding the mechanisms of catalytic reactions at the molecular level and developing new catalysts with higher activity, selectivity, and durability. Ambient pressure X-ray photoelectron spectroscopy (AP-XPS) is a technique studying the surface of a sample in the gas phase, mainly identifying chemical identity, analyzing oxidation state, and measuring surface composition.In the last decade, numerous photoelectron spectroscopic methods for fundamental studies of key topics in catalysis using AP-XPS have been developed.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
Institute of Materials Chemistry, Technische Universität Wien, 1060, Vienna, Austria.
Currently, lack of ways to engineer specific and well-defined active sites in zeolitic imidazolate frameworks (ZIFs) limits our fundamental knowledge with respect to the mechanistic details for (photo)electrocatalytic hydrogen evolution reaction (HER). Here, we introduce the open metal sites into ZIFs through the selective ligand removal (SeLiRe) strategy, comprehensively characterize the altered structural and electronic features, and evaluate their role in HER. In situ electrochemical analysis and X-ray absorption spectroscopy reveal the formation of high-valence HO-Zn-N sites through the binding of Zn-N with electrolyte hydroxide.
View Article and Find Full Text PDFACS Omega
December 2024
Department of Chemical Engineering, Instituto de Ciências Ambientais, Químicas Farmacêuticas, Universidade Federal de São Paulo, Rua São Nicolau, 210, Diadema, Sao Paulo 09913-030, Brazil.
To enable the photoelectrocatalytic treatment of large volumes of water containing low concentrations of pollutants, this study introduces a hybrid photocatalyst, composed of nanotubular oxides grown on TiW alloy ( = 0.5 and 5.0 wt %) modified with UiO-66 MOF, for degradation of estrone (E1) and 17α-ethinyl estradiol (EE2).
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!