Direct Seawater Hydrogen Evolution via Atomically Precise Regulation of Interfacial pH and Ion‐Water Interactions
原子精度での界面pHとイオン-水相互作用の制御による直接海水水素発生 (AI 翻訳)
Zhipu Zhang, Shanshan Lu, Qisheng Yan, Xinxin Pan, Qi Chen, Qiang Zhao, Qiaofeng Yao, Moshuqi Zhu, Qing-qiong Tang, Wenping Hu
🤖 gxceed AI 要約
日本語
本研究は、原子精度で設計された白金ナノクラスター触媒を用いて、海水直接電解による水素生成の効率と安定性を向上させる手法を報告。触媒表面の配位子がナトリウム・カリウムイオンを濃縮し、界面pH勾配を形成することで、水素発生反応の促進と同時にマグネシウム・カルシウム沈殿や塩化物イオン腐食を抑制する。低白金担持量で500時間以上の安定動作を実現し、グリーン水素製造への応用が期待される。
English
This study reports a pH-gradient-mediated interfacial engineering strategy using atomically precise platinum nanoclusters to enhance the activity and stability of direct seawater electrolysis for hydrogen production. The self-organized ligands concentrate Na+/K+ cations, accelerating HER kinetics and creating an alkaline interfacial pH that repels Mg2+/Ca2+ precipitation and Cl- corrosion. The catalyst achieves 10 mA cm-2 at 292 mV overpotential with over 500 h stability, using one-tenth the Pt loading of commercial Pt/C, offering a sustainable route for green hydrogen.
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
本技術は、日本が推進する水素社会実現に向けたグリーン水素製造の高効率化に寄与する可能性がある。ただし、実用化にはスケールアップやコスト評価が必要であり、現時点では基礎研究段階。
In the global GX context
This work addresses a key challenge in direct seawater electrolysis for green hydrogen, which is critical for global energy transition. While it does not directly engage with disclosure frameworks, its technological advance could inform future life-cycle assessments and decarbonization pathways in hydrogen production.
👥 読者別の含意
🔬研究者:Researchers in electrocatalysis and hydrogen production will find a novel interfacial pH-gradient strategy that significantly improves stability and reduces precious metal loading.
🏢実務担当者:Corporate R&D teams focused on electrolyzer development can explore the atomically precise nanocluster design for potential scale-up and cost reduction.
🏛政策担当者:Policymakers supporting hydrogen strategy may note the progress in direct seawater electrolysis as an emerging technology for renewable hydrogen, but further techno-economic analysis is needed.
📄 Abstract（原文）
Direct seawater electrolysis offers a sustainable route to green hydrogen production from abundant saline water resources, yet industrial applications are limited by sluggish kinetics and catalyst deactivation caused by Mg(OH) 2 /Ca(OH) 2 precipitation or Cl − corrosion. Here, we report a pH‐gradient‐mediated interfacial engineering strategy that simultaneously enhances activity and stability of metal nanocatalysts for the hydrogen evolution reaction (HER) in natural seawater. By using atomically precise Pt 6 (TPP) 4 Cl 5 nanoclusters (NCs) (Pt 6 ‐TPP, TPP = triphenylphosphine) as paradigm catalysts, we demonstrate self‐organized TPP ligands on cluster surface tether Na + /K + via cation–π interactions. The locally concentrated Na + /K + cations disrupt the hydrogen‐bond network of water molecules for accelerating HER kinetics, and electrostatically attract OH − to establish an alkaline interfacial pH, which can propagate into a diffuse pH gradient toward the bulk of the solution. This pH gradient drives Mg 2+ /Ca 2+ precipitation away from the catalytic surface, preventing site blockage. The enriched OH − can also resist Cl − corrosion of Pt 6 ‐TPP NCs. Consequently, Pt 6 ‐TPP achieves 10 mA cm −2 at an overpotential of 292 mV and retains exceptional stability (> 500 h) under intermittent renewable‐energy operation, with one‐tenth the Pt loading of commercial Pt/C. This work establishes a pH gradient‐mediated interfacial chemistry framework enabled by atomically precise engineering, providing guidance for sustainable and efficient direct seawater hydrogen evolution.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1002/ange.7140350first seen 2026-05-15 20:45:24
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