This week in energy, materials, and information science: African-led studies on green hydrogen, wastewater treatment, and legal AI, plus global papers on mining and tribology.
📊 This week at a glance
🌍 African-led research
A new bifunctional medium-entropy amorphous alloy can split water and degrade pollutants in wastewater simultaneously.
This catalyst works in the same pH for both reactions, overcoming a key mismatch that previously forced separate treatment steps. For African industries with limited water treatment infrastructure, this could enable hydrogen production and wastewater cleanup in a single reactor, reducing costs and energy use. The finding is preliminary and based on lab-scale experiments.
Green hydrogen production from solar and wind is economically feasible in Nigeria, with levelized cost as low as $3.5/kg.
The study models a hybrid solar-wind system in southwestern Nigeria and finds that hydrogen production cost is most sensitive to electrolyzer efficiency and renewable capacity factor. For African policymakers, this provides site-specific data to guide investments in green hydrogen as a decarbonization pathway for transport and industry.
A new modulation scheme for OFDM improves spectral efficiency by 15% over conventional index modulation.
The enhanced generalized index modulation (EGIM) encodes additional bits by activating multiple subcarriers per group, boosting data rates without extra bandwidth. For African telecom operators expanding 5G and rural connectivity, this could mean faster data transmission with existing infrastructure. The work is theoretical; no hardware validation is reported.
Scientometric mapping reveals that surfactant adsorption research for enhanced oil recovery is dominated by China, the US, and India, with Africa contributing less than 2% of publications.
The analysis of 877 papers (2005–2025) shows that adsorption mechanisms and novel surfactants are top research fronts. For African oil-producing nations like Nigeria and Angola, this gap signals an opportunity to invest in local cEOR research to reduce chemical costs and improve recovery efficiency from mature fields.
CollectivIA, a two-pipeline legal retrieval system, achieves 85% accuracy in answering Moroccan territorial governance questions in Arabic and French.
The system uses large language models (LLMs) and regex-based chunking to handle messy PDFs and dialectal Arabic (Darija). For African governments digitizing legal documents, this offers a blueprint for building reliable, multilingual AI tools that reduce hallucinations in high-stakes administrative queries.
A theoretical model shows that adding gyrotactic microorganisms to a non-Newtonian nanofluid in a wavy channel increases heat transfer by 12%.
The study analyzes entropy generation in a tapered tube with magnetic field, relevant for drug delivery and microfluidic biosensors. For African biomedical engineers, this provides a framework to design more efficient microfluidic devices for point-of-care diagnostics, though the work is purely theoretical and needs experimental validation.
Algeria’s LNG strategy faces carbon lock-in due to institutional inertia and regulatory opacity, risking stranded assets as global decarbonization accelerates.
The study applies carbon lock-in theory to Algeria’s gas sector, finding that state-owned enterprises and opaque contracts hinder diversification. For African energy policymakers, this highlights the need to phase in renewables and reform fossil-fuel subsidies to avoid economic shocks from declining gas demand.
🔬 Global breakthroughs
Broken coal gangue used as backfill material in mines shows a 30% reduction in bearing capacity when water content increases from 0% to 10%.
Experiments on crushed gangue from Chinese goafs reveal that moisture significantly weakens the fill material, affecting ground stability. For African mining operations considering gangue backfilling to reduce waste, this means water management is critical to maintain support strength.
Faster cooling during production of zirconium-based metallic glasses increases wear resistance by 40% due to greater structural heterogeneity.
Atomic force microscopy tests show that rapidly cooled glasses have more free volume, which enhances plasticity and reduces nanowear. For African materials scientists developing durable coatings or microelectromechanical systems (MEMS), this offers a processing route to improve component lifespan.
The traditional scholarly article format limits what knowledge can be expressed, and postdigital scholars are tinkering with alternative formats like video and hypertext.
The authors argue that standardized article structures constrain thinking and marginalize non-linear, multimodal scholarship. For African researchers seeking to decolonize knowledge production, this opens space for formats that better capture oral traditions, community knowledge, and multimedia data.
All papers are open access. Explore more Technology & Engineering research on FRELIP · discover open scholarship at frelip.org and search 36,000+ open works at search.frelip.org. FRELIP — born in Nigeria, built for African scholarship, serving the world.