▌Spatial Confinement Synthesis of Platinum Group Metal Single-Atom Alloy Catalysts for Acidic Hydrogen Evolution
空間限制合成鉑族金屬單原子合金催化劑用於酸性析氫反應
Y. Zhu, W. H. Huang, X. Shi, S. Liu, M. Ait-Tamerd, M. Yang, J. Li, M. H. Yeh, C. C. Chang, H. Cheng and J. Ma*
https://doi.org/10.1021/jacs.5c10431
SEED Member: M. H. Yeh, W. H. Huang
Major Contributions
1. A spatial confinement strategy enables fabrication of C@Pt-NiFe single-atom alloy (SAA) catalysts; operando XAS confirms low-coordination Pt sites generated in situ as the primary active sites, while DFT reveals optimized electronic structure and ΔGH* for enhanced acidic HER.
2. C@Pt-NiFe SAA exhibits superior mass activity versus commercial Pt/C for acidic HER and outperforms Pt/C when integrated as PEMWE cathode, demonstrating practical viability for water electrolysis.
3. The spatial confinement approach is universally applicable to other PGM-based SAAs (Ru, Rh, Pd, Os, Ir), establishing a generalizable platform for next-generation electrocatalytic applications.
主要貢獻
1. 空間限制策略合成 C@Pt-NiFe 單原子合金（SAA）催化劑；原位 XAS 確認原位生成的低配位 Pt 位點為主要活性位，DFT 揭示優化的電子結構與 ΔGH* 以增強酸性 HER。
2. C@Pt-NiFe SAA 在酸性 HER 中的質量活性優於商業 Pt/C，整合至質子交換膜電解水裝置（PEMWE）陰極時同樣表現更佳，展現實用可行性。
3. 空間限制方法可普遍適用於其他鉑族金屬 SAA（Ru、Rh、Pd、Os、Ir）的製備，建立下一代電催化應用的通用平台。
