Green Hydrogen Production Using Low-Cost Alkaline Electrolysis Powered by Renewable Energy
再生可能エネルギーを利用した低コストアルカリ電解によるグリーン水素製造 (AI 翻訳)
Ogechi Goodness Ibelegbu, Nkemakolam Chinedu Izuwa, Humphery Nwenenda Dike, P. I. Anyanwu, O. B. Akhabue, Ekwebelem Emmanuel Chinazor
🤖 gxceed AI 要約
日本語
本研究は、再生可能エネルギー由来の電力を模擬した直流電源を用いたアルカリ水電解による水素製造を実験的に検討した。電解質濃度と印加電圧の影響を評価し、600 g/L KOH、12 Vで最大水素量2.5879 L、ファラデー効率61.89%を達成した。ステンレス鋼電極の安定性も確認され、低コストな分散型水素製造の可能性を示した。
English
This study experimentally investigated green hydrogen production via alkaline water electrolysis using a simulated renewable power source. Effects of KOH concentration and voltage were evaluated, achieving a maximum hydrogen volume of 2.5879 L and Faradaic efficiency of 61.89% at 600 g/L and 12 V. Stainless-steel electrodes showed excellent stability, suggesting potential for low-cost decentralized hydrogen production.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本は水素基本戦略を掲げ、グリーン水素のコスト低減と供給拡大を目指している。本研究成果は低コスト電極材料と運転条件の最適化に寄与し、国内の水素サプライチェーン構築や再エネ活用に示唆を与える。
In the global GX context
Globally, green hydrogen is pivotal for decarbonizing hard-to-abate sectors. This study provides experimental data on low-cost alkaline electrolysis, contributing to cost reduction efforts and decentralized production, relevant to global hydrogen strategies and renewable integration.
👥 読者別の含意
🔬研究者:Provides experimental data on low-cost alkaline electrolysis, useful for optimizing electrolyzer design and operation.
🏢実務担当者:Offers insights into cost-effective hydrogen production methods, potentially applicable for small-scale or decentralized projects.
🏛政策担当者:Highlights the potential of low-cost electrolysis for green hydrogen, informing policy support for R&D and deployment.
📄 Abstract（原文）
Hydrogen has gained significant attention as a clean energy carrier capable of supporting industrial decarbonization and the integration of renewable energy sources. This study experimentally investigated hydrogen production through alkaline water electrolysis using potassium hydroxide (KOH) as the electrolyte and stainless-steel electrodes in a laboratory-scale system powered by a regulated direct-current source simulating renewable electricity. The effects of electrolyte concentration (100–600 g/L KOH) and applied voltage (5–12 V) on hydrogen generation were evaluated over a fixed period of 60 minutes, with gas volumes determined indirectly through gravimetric mass-loss measurements and reported at standard temperature and pressure (STP) conditions. The results showed that hydrogen generation was strongly influenced by electrolyte concentration, with no measurable production observed at 100 g/L and 200 g/L due to insufficient ionic conductivity. Hydrogen evolution initiated at 400 g/L and increased substantially at 600 g/L, achieving a maximum calculated hydrogen volume of 2.5879 L and a peak Faradaic efficiency of 61.89% at 12 V. Increasing the applied voltage generally improved hydrogen yield, though a severe performance collapse down to a 1.62% efficiency occurred at 400 g/L and 12 V due to Ohmic Joule heating and electrode shielding via the gas-curtain effect. Furthermore, the stainless-steel electrodes exhibited excellent electrochemical stability with no macroscopically observable wear, confirming their viability as a durable, low-cost catalyst alternative. Overall, the findings demonstrate that efficient hydrogen production can be achieved using an optimized, low-cost gravimetric system, highlighting its potential for decentralized applications.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.2118/234800-msfirst seen 2026-08-14 05:30:38
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