by Jéssica A.P. Ponciano  and Marcelo S. Batista

Received: 01 December 2021;  Published: 26 January 2022;  doi: 10.21926/cr.2201002

In this paper, the relationship between activity and structure of Cu2+ in different chemical environments of Cu-BETA, La2CuO4, and CuO nanocatalysts was systematically investigated for acetonitrile combustion. The study revealed that exchanged and octahedral species of Cu2+ coexist in Cu-BETA, while octahedral species are dominant in CuO and La2CuO4. All nanocatalysts achieved high conversion rates of acetonitrile, which rapidly increased with temperature. CuO and La2CuO4 led to the formation of undesired products [...]

by Fabien Drault  , Youssef Snoussi  , Camila P. Palombo Ferraz  , Joelle Thuriot-Roukos  , Svetlana Heyte  , Ivaldo Itabaiana Junior  , Maya Marinova  , Sebastien Paul  and Robert Wojcieszak

Received: 25 October 2021;  Published: 13 January 2022;  doi: 10.21926/cr.2201001

Regardless of their size, supported gold nanoparticles are largely used for liquid-phase oxidation reactions. Small gold nanoparticles exhibit good performance during the reduction of organic compounds. The direct reduction of carboxylic acid to aldehyde is a famous and familiar reaction in the field of organic chemistry and is considered as one of the fundamental chemical transformations. Herein, we present Au/hydrotalcite, Au/MgO, and Au/Al2O3 systems as heterogeneous versatile catalysts to realize the oxidation [...]

by Ludmila Velichkina  , Yakov Barbashin  and Alexander Vosmerikov

Received: 10 October 2021;  Published: 01 December 2021;  doi: 10.21926/cr.2104004

The objective of this research was to analyze the effect of different concentrations of nitric and hydrochloric acids on the structural, acidic, and catalytic properties of a post-synthetic treated ZSM-5 type zeolite at various temperatures. The properties of zeolite catalysts were determined using different methods, such as the Brunauer-Emmett-Teller (BET) method for specific surface area, temperature-programmed desorption (TPD) of ammonia method for acidic properties, and a flow-through unit with fixed bed cataly [...]

by Lin Xie  and Donald Kirk

Received: 09 June 2021;  Published: 16 September 2021;  doi: 10.21926/cr.2103003

Fe-rich alloys have been widely studied as catalyst materials for the cathodic oxygen reduction reaction (ORR) in hydrogen fuel cells, and many have shown high activities. The stability of Fe-rich catalysts has also been researched, and some studies have shown promising results using an accelerated stress test (AST), which uses a potential cycling method. However, for commercial fuel cell applications, such as standby power systems, the catalyst has to tolerate a high potential for a long period, which can not be r [...]

by Minato Nakamura  and Yoshinori Murakami

Received: 17 August 2021;  Published: 13 September 2021;  doi: 10.21926/cr.2103002

The photocatalytic reaction involved in TiO2 photocatalysis was investigated using a microreactor coated with TiO2 film on the glass plate attached on one side of the microreactor. It was confirmed that the effect of H2O2 on the photocatalytic degradation efficiency of azo dyes (acid orange 7, acid red 151, and acid yellow 23) was dependent on the polymorphs (anatase and rutile) of TiO2 coated on the glass plate of the UV-irradiated microreactor. Scavengers of holes (KI) and electrons (p-benzoquinone) were added to [...]

by Shiping Wang  , Georg Bendt  and Stephan Schulz

Received: 24 May 2021;  Published: 16 July 2021;  doi: 10.21926/cr.2103001

One-pot synthesis of mesoporous hybrid material consisting of Mn-Co/CoO nanoparticles encapsulated in an N-doped graphene shell decorated with Mo2C nanoparticles (Mo2C-NC@Mn-Co/CoO) was reported. The Mn and Mo components synergistically refined the graphitized carbons due to the interactions with N and C atoms while promoting the stability of the Co/CoO nanoparticles. These components exhibited a beneficial effect on the dispersion of the active metal/metal oxide nanoparticles and the formation of a mesoporous stru [...]

by G.-Fivos Sargentis  , Sofian Baroudi  , Marios-Athanasios Angelidis  , Ilias Arvanitidis  , Nikos Mamassis  and Romanos Ioannidis

Received: 03 November 2025;  Published: 01 March 2026;  doi: 10.21926/aeer.2601005

Mediterranean regions like West Mani, Greece, face escalating water scarcity exacerbated by climate variability and seasonal tourism peaks, straining the water-energy-food (WEF) nexus. Olive cultivation, central to the region’s economy and culture, generates substantial underutilized biomass residues that increase wildfire risk if left unmanaged. At the same time, water supply increasingly relies on energy-intensive desalination and pumping. This study addresses the gap in integrated, place-based WEF nexus applicat [...]

by Muhammad Hannan  , Muzafar Ali  , Chengpeng Lu  and Jia Xu

Received: 12 August 2025;  Published: 24 February 2026;  doi: 10.21926/aeer.2601004

Sindh Province, Pakistan, is highly vulnerable to hydroclimatic extremes, necessitating a detailed understanding of its precipitation patterns for effective water management. This study assesses spatiotemporal precipitation dynamics across Sindh from 2001 to 2024 by integrating satellite-based CHIRPS data, in situ observations from the Climate Knowledge Portal (CKP), and CMIP6 climate model projections. Validation results show strong agreement between CHIRPS and ground data (R ≈ 0.87, d ≈ 0.93), confirming the sate [...]

by Agegnehu Kitanbo Yoshe

Received: 08 November 2025;  Published: 10 February 2026;  doi: 10.21926/aeer.2601003

Characterizing drought severity using GRACE and TerraClimate datasets is globally important because it enables consistent, large-scale monitoring of both surface and subsurface water availability across data-scarce regions. This integrated perspective supports improved drought assessment, climate change impact analysis, and informed water-resource management worldwide. The Ethiopian Rift Valley has experienced recurrent hydrological drought hazards, posing serious threats to water availability, agricultural product [...]

by Kamal A. R. Ismail  , Fatima A. M. Lino  , Mohamed Teggar  , Abdelghani Laouer  , Pedro L. O. Machado  , Felipe M. Biglia  and Thiago A. Alves

Received: 27 June 2025;  Published: 12 January 2026;  doi: 10.21926/aeer.2601002

Buildings account for a significant portion of global energy consumption, estimated at 30-40%, and also contribute to greenhouse gas emissions. Energy consumption in a building is mainly thermal (natural gas) and electrical. This energy is usually used for heating water, cooking, illumination, ventilation and air conditioning, powering appliances, floor heating, and other activities. These activities were examined, and their substitution by solar-based energy sources was reviewed. To achieve this objective, an exte [...]