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Chemistry Proceedings

Chemistry Proceedings is an open access journal dedicated to publishing findings resulting from conferences, workshops, and similar events, in all areas of chemistry.
The conference organizers and proceedings editors are responsible for managing the peer review process and selecting papers for conference proceedings.

All Articles (978)

  • Proceeding Paper
  • Open Access

Intermetallic compounds (IMCs) can be used to create catalysts with unsurpassed practical characteristics, including for demanding and stable electrochemical reactions such as nitrogen reduction (NRR), nitrate reduction (NO3RR), and nitrite reduction (NO2RR), which can serve as a replacement for the industrial Haber–Bosch process. An urgent task is to develop efficient electrocatalysts using low-cost base metals, with partial or complete replacement of noble metals. This short perspective review focuses primarily on the latest work from 2024–2025 and serves as a guide and starting point for a wide readership on the IMC applications of catalysts.

11 September 2025

The results of the NO3RR study at different potentials: (a) the resulting general FE-graph, and (b) ammonia yield rate. Adapted from [20].
  • Proceeding Paper
  • Open Access

The production of biodiesel from microalgae presents a sustainable and renewable solution to the growing global energy demands, with catalysts playing a critical role in optimizing the transesterification process. This study examines the emerging catalysts and innovative techniques utilized in converting microalgal lipids into fatty acid methyl esters, emphasizing their impact on reaction efficiency, yield, and environmental sustainability. Sulfuric acid demonstrates excellent performance in in situ transesterification, while NaOH/zeolite achieves high biodiesel yields using ultrasound- and microwave-assisted methods. Metal oxides such as CuO, NiO, and MgO supported on zeolite, as well as ZnAl-layered double hydroxides (LDHs), further enhance reaction performance through their high activity and stability. Enzymatic catalysts, particularly immobilized lipases, provide a more environmentally friendly option, offering high yields (>90%) and the ability to operate under mild conditions. However, their high cost and limited reusability pose significant challenges. Ionic liquid catalysts, such as tetrabutylphosphonium carboxylate, streamline the process by eliminating the need for drying and lipid extraction, achieving yields as high as 98% from wet biomass. The key novelty of this work lies in its detailed focus on the use of ionic liquids and nanocatalysts in microalgae-based biodiesel production, which are often underrepresented in previous reviews that primarily discuss homogeneous and heterogeneous catalysts.

13 August 2025

Catalysts in microalgae-based biodiesel production.
  • Proceeding Paper
  • Open Access

Sulfate radical-based advanced oxidation processes (AOPs) are effective for removing organic pollutants from wastewater. In this study, transition metal-doped cobalt oxyhydroxide (CoOOH) was synthesized as an efficient peroxymonosulfate (PMS) activator for the decolorization of rhodamine B. Doping CoOOH with transition metals enhanced its PMS activation performance compared with that of pure CoOOH. Notably, the reaction rate constant in the Ni-CoOOH/PMS system was approximately 4.3 times higher than that in the CoOOH/PMS system. The presence of multiple metals in the catalyst facilitated efficient Co2+/Co3+ redox cycling, resulting in improved PMS activation and more effective organic pollutant removal. This study highlights the potential of CoOOH-based materials for use in environmental remediation technologies utilizing PMS.

11 August 2025

(a) XRD patterns of CoOOH and M-CoOOH (M = Cu, Ni, Fe, Zn, and Mn); (b,c) enlarged views of the selected regions in (a).
  • Proceeding Paper
  • Open Access

Preparation of Nanosized Mesoporous Metal Oxides

  • Olena Korchuganova,
  • Emiliia Tantsiura and
  • Kamila Abuzarova
  • + 1 author

Nowadays, nanosized mesoporous oxides are of increasing interest to scientists. They can be used as components of heterogeneous catalysts, for photo- and electrocatalysis, as gas sensors, etc. For instance, the desired properties in catalysts include a nano size and homogeneity of the particles that form the catalyst. The particle sizes of oxides are set at the initial stage of their formation, as precursors of precipitation in the context of wet chemistry. The creation of optimal conditions is possible through the use of homogeneous precipitation, where the precipitant is formed within the solution itself as a result of a hydrolysis reaction. The resolution of this issue involved the utilization of urea in our experimental setup, obtaining the hydrolysis products of ammonia and carbon dioxide. Consequently, precipitation reactions can be utilized to obtain hydroxides, carbonates, or hydroxy carbonates of metals. The precursors were calcined, obtaining nanosized mesoporous oxides, which can have a wide range of applications. Nanosized 0.1–50 nm metal oxides were obtained, including those aluminum, iron, indium, zinc, nickel, and cobalt.

1 August 2025

Gibbs energy of oxides precursors forming reaction: (a) hydroxides according to Equations (17)–(19); (b) carbonates according to reactions (20)–(21).

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Chemistry Proceedings - ISSN 2673-4583Creative Common CC BY license