Pore Size Effects of Mesoporous N‐Doped Carbon Nanospheres as Advanced Support Material on the Activity of Molybdenum Sulfide Catalysts for the Hydrogen Evolution Reaction
水素発生反応用モリブデン硫化物触媒の活性におけるメソポーラス窒素ドープカーボンナノスフェア（先進的担体材料）の細孔径効果 (AI 翻訳)
Niklas Ortlieb, Christian Völker, Lars Guggolz, Anna Fischer
🤖 gxceed AI 要約
日本語
水素は高エネルギー密度のクリーンエネルギーキャリアであるが、製造には高価な白金触媒が課題。本研究では、メソポーラス窒素ドープカーボンナノスフェアを担体としたモリブデン硫化物触媒を開発し、細孔径60nmで最適な水素発生性能を示した。低いTafel勾配(44 mV dec-1)と高い電流密度を達成し、グリーン水素製造の低コスト化に貢献。
English
Hydrogen is a clean energy carrier but requires active catalysts. This study develops molybdenum sulfide catalysts on mesoporous nitrogen-doped carbon nanospheres, optimizing pore size to 60 nm for best hydrogen evolution performance, with low Tafel slope (44 mV/dec) and high current density, contributing to cost-effective green 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
日本のGX政策ではグリーン水素を重要な脱炭素経路と位置付けている。本研究は電解装置の低コスト触媒に関する材料レベルの革新であり、国産電解装置の競争力向上につながる可能性がある。
In the global GX context
Green hydrogen production via water electrolysis is critical for global decarbonization. This paper advances non-precious metal catalysts, potentially lowering electrolyzer costs—a key barrier to hydrogen adoption—and complements policy frameworks like the EU Hydrogen Strategy and US Hydrogen Hubs.
👥 読者別の含意
🔬研究者:Provides insight into pore size optimization for HER catalysts using MoSx on mesoporous carbon supports, relevant for electrocatalysis and hydrogen production.
🏢実務担当者:Could inform catalyst design for electrolyzer manufacturers seeking lower-cost alternatives to platinum.
🏛政策担当者:Underlines the potential for affordable green hydrogen through catalyst innovation, supporting policy investment in hydrogen infrastructure.
📄 Abstract（原文）
Hydrogen is a key sustainable chemical energy carrier due to its high gravimetric energy density (143 MJ kg−1, higher heating value (HHV)). It can be generated from electrochemical water splitting powered by renewable energy, but requires active and stable electrocatalysts. Hereby, platinum, the benchmark catalyst, is scarce and expensive, limiting the feasibility of affordable green hydrogen. In contrast, molybdenum sulfide (MoSx) offers a promising alternative due to its reasonable activity, abundance, low cost, and chemical stability. Increasing the catalytic activity of MoSx can be achieved by increasing active sites, doping, or using conductive supports. We report MoSx catalysts immobilized on mesoporous nitrogen‐doped carbon (MPNC) nanospheres as advanced supports. The high surface area and uniformity of MPNC enable thin, homogeneous MoSx coatings. After optimizing MoSx loading (38 wt.%) and MoSx precursor decomposition temperature (80°C), we tuned MPNC intraparticle pore sizes from 15 to 99 nm. A pore size of 60 nm yielded the best hydrogen evolution performance. This catalyst showed an onset potential of −155 mV vs. RHE and achieved 10 mA cm−2 at −199 mV. Electrochemical mass spectrometry confirmed hydrogen generation already from −110 mV vs. RHE. A low Tafel slope of 44 mV dec−1 highlights the composite's promise for high current density hydrogen evolution.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1002/adfm.202521094first seen 2026-05-15 20:20:05
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