炭素コーティングはPEM燃料電池電極用触媒担体としてのカーボンキセロゲルの耐久性を向上できるか？
Can Carbon Coating Improve the Durability of Carbon Xerogels as Catalyst Supports for Proton Exchange Membrane Fuel Cell Electrodes? (原題)
Bryan Carré, Berke Karaman, Zoé Deckers, Tom Servais, Alexandre F. Léonard, Nathalie Job
🤖 gxceed AI 要約
日本語
細孔径約70nmのカーボンキセロゲル(CX)を燃料電池電極触媒の担体として検討した研究。CXは物質輸送性に優れるが非晶質ゆえ酸化条件下での炭素腐食に弱い。CVDで部分黒鉛化炭素層を表面に被覆し、さらに1500℃不活性雰囲気で後処理することで、細孔ネットワークを維持しつつ耐久性を改善。Pt担持触媒は初期活性を維持しつつ、MEA構成で良好な耐久挙動を示した。
English
This study evaluates a ~70 nm carbon xerogel (CX) as a PEMFC electrocatalyst support. Because CX is amorphous and prone to carbon corrosion, a partially graphitized carbon layer was deposited via CVD and post-treated at 1500 °C, preserving the meso/macropore network. Pt (20 wt%) catalysts on treated supports retained initial activity and showed encouraging durability in MEA testing, attributed to altered Pt nanoparticle growth without harming mass transport.
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
水素社会実装の鍵となる燃料電池の耐久性・コスト低減に資する材料研究。日本の水素・燃料電池戦略や商用車・定置用FC普及の文脈で、担体劣化抑制は実用耐久年数の延長に直結しうる。ただし現段階では実験室レベルで、SSBJや開示実務との直接接点は薄い。
In the global GX context
Durability and cost of PEMFC stacks are central to global hydrogen and clean-transport transition pathways. Improved catalyst-support stability addresses a key degradation bottleneck for fuel cell commercialization, relevant to hydrogen strategy and industrial decarbonization policy, though it sits upstream of disclosure frameworks like TCFD/ISSB.
👥 読者別の含意
🔬研究者:CVD被覆と高温後処理がCX担体の炭素腐食耐性とPt安定性に与える効果を、RDE/MEA両構成で定量評価した点が参考になる。
🏢実務担当者:燃料電池システムの耐久寿命・交換コスト見通しを検討する際、担体材料の劣化抑制技術の進展として留意できる。
🏛政策担当者:水素・燃料電池の普及政策において、材料耐久性の研究開発支援が実用化コスト低減に寄与する点を示唆する。
📄 Abstract（原文）
Abstract A carbon xerogel (CX) with a pore size of ∼70 nm was selected as support for a fuel cell electrocatalyst. While carbon xerogels offer excellent mass transport properties, their amorphous nature reduces their resistance to carbon corrosion under the oxidizing conditions of PEMFC operation. To tackle this, a partially graphitized carbon layer was deposited on the xerogel surface using chemical vapor deposition (CVD). This layer covers a large part of the micropores but keeps intact the interconnected meso/macropore network of the CX. The carbon-coated CX was also post-treated at 1500 °C under an inert atmosphere for further crystallization. Pt nanoparticles (20 wt %) were then deposited on both pristine and CVD-treated CXs by reduction of hexachloroplatinic acid in liquid phase; the resulting catalysts were evaluated with respect to their electrochemical activity and compared to a commercial carbon black-supported catalyst. The catalyst on the post-treated supports exhibited initial catalytic activities comparable to those obtained on pristine CX. After accelerated aging in RDE configuration, despite a decrease in the catalytic surface of Pt, specific activities increased while mass activities remained stable. In the Membrane-Electrodes Assembly configuration, the catalyst supported on the carbon xerogel post-treated with chemical vapor deposition and subsequent high-temperature treatment at 1500 °C exhibited encouraging durability behavior. This behavior was attributed to differences in Pt nanoparticle growth on post-treated carbon xerogel supports. Moreover, it was observed that these post-treatments do not negatively affect mass transport inside the electrode, since the meso/macropore texture remained intact.
🔗 Provenance — このレコードを発見したソース
- openalex https://orbi.uliege.be/handle/2268/349810first seen 2026-10-23 05:22:16 · last seen 2026-11-06 04:57:12
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