Phosphate-tolerant PtCo alloys enabled by sulfur-doped carbon encapsulation for ultra-low-Pt-loading HT-PEMFCs

耐リン酸性PtCo合金：硫黄ドープ炭素カプセル化による超低Pt担持HT-PEMFC (AI 翻訳)

Zhuofan Gan, Zhixu Chen, Peixi Qiu, Jingwen Cao, Jiangyun Bai, Ji Feng, Zhongxin Chen, Chengwei Deng, Chengyong Shu, Wei Tang

Energy Materials📚 査読済 / ジャーナル2026-06-05#水素Origin: CN

DOI: 10.20517/energymater.2025.130

原典: https://doi.org/10.20517/energymater.2025.130

🤖 gxceed AI 要約

日本語

本研究は、硫黄ドープ炭素カプセル層で被覆した超微細PtCo合金ナノ粒子を合成し、リン酸被毒を抑制。低Pt担持（0.1 mg cm⁻²）でも高出力密度（355 mW cm⁻²）と耐久性（100時間超）を達成し、HT-PEMFCの実用化に貢献。

English

This study develops ultrafine PtCo alloy nanoparticles encapsulated in sulfur-doped carbon layers to resist phosphoric acid poisoning. The catalyst achieves high power density (355 mW cm⁻²) with ultra-low Pt loading (0.1 mg cm⁻²) and stable operation over 100 hours, advancing low-cost HT-PEMFC technology.

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

日本は水素社会の実現に向けて燃料電池車や定置用燃料電池の普及を推進しており、Pt使用量低減はコスト削減の鍵。本研究成果は、日本の水素エネルギー戦略に寄与する可能性がある。

In the global GX context

Global hydrogen economy requires cost-effective fuel cells; this catalyst reduces platinum loading significantly, addressing a major barrier to widespread HT-PEMFC adoption in transport and stationary power.

👥 読者別の含意

🔬研究者:Provides a novel synthesis strategy for phosphate-tolerant, low-Pt catalysts that can be adapted for other electrochemical systems.

🏢実務担当者:Offers a catalyst design that could lower the cost of HT-PEMFC stacks, relevant for fuel cell manufacturers.

🏛政策担当者:Supports hydrogen energy roadmaps by demonstrating potential for cost reduction in fuel cell technology.

📄 Abstract（原文）

High-temperature proton exchange membrane fuel cells (HT-PEMFCs) have garnered considerable interest owing to their superior tolerance toward CO impurities and the inherent advantages of facile water management. However, severe phosphoric acid poisoning of Pt catalysts necessitates markedly higher Pt loadings than in low-temperature proton exchange membrane fuel cells, thereby constraining their large-scale deployment. Herein, we present an additive-assisted impregnation approach to synthesize ultrafine PtCo alloy nanoparticles encapsulated by defect-rich S-doped carbon encapsulation layers (CELs). The use of short-chain sodium thioglycolate enables the formation of ultrafine PtCo nanoparticles (~2.82 nm) coated with ~0.4 nm-thick CELs, effectively suppressing metal sintering during high-temperature annealing and strengthening metal-support interactions. The S-doped CELs provide dual protection against phosphoric acid poisoning by physically isolating the PtCo alloys and introducing negatively charged carbon defects to electrostatically repel phosphate anions. Consequently, the optimized sodium thioglycolate-PtCo alloy electrocatalyst delivers a high mass activity of 0.695 A mgPt-1 at 0.85 V along with enhanced durability in 0.1 M H3PO4 at 80 °C. It further maintains excellent phosphate tolerance and oxygen reduction reaction activity, even in concentrated 85 wt% H3PO4 at 120 °C. Remarkably, in HT-PEMFCs, it achieves superior peak power densities of 613 and 908 mW cm-2 in H2-air and H2-O2, respectively, with a low Pt loading of 0.3 mgPt cm-2. Even at an ultra-low Pt loading of 0.1 mgPt cm-2, it delivers a peak power density of 355 mW cm-2 and an exceptional Pt-specific power density of 3.53 kW gPt-1 in H2-air cell, while sustaining stable operation over 100 h with minimal voltage decay. This study offers a versatile strategy to develop phosphate-resistant catalysts for high-performance HT-PEMFCs with low-Pt-loading.

🔗 Provenance — このレコードを発見したソース

openalex https://doi.org/10.20517/energymater.2025.130first seen 2026-06-07 04:58:02

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