Yang Xiaotong, Dong Kaiyu, Zheng Zhe, Zhang Yuehuan, Yuan Qiang
Center for R&D of Fine Chemicals, State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province 550025, People's Republic of China.
Center for R&D of Fine Chemicals, State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province 550025, People's Republic of China.
J Colloid Interface Sci. 2025 Jan 15;678(Pt B):153-161. doi: 10.1016/j.jcis.2024.08.252. Epub 2024 Sep 3.
Efficient CC bond cleavage and the complete oxidation of alcohols are key to improving the efficiency of renewable energy utilization. Herein, we successfully prepare porous Fe-doped hexagonal close-packed (hcp)-PtBi/face-centered cubic (fcc)-Pt heterostructured nanoplates with abundant grain/phase interfaces (h-PtBi/f-Pt@Fe PNPs) via a simple solvothermal method. The open porous structure, abundant grain/phase interface and stacking fault defects, and the synergistic effect between intermetallic hcp-PtBi and fcc-Pt make h-PtBi/f-Pt@Fe PNPs an effective electrocatalyst for the glycerol oxidation reaction (GOR) in direct glycerol fuel cells (DGFCs). Notably, the h-PtBi/f-Pt@Fe PNPs exhibit an excellent mass activity of 7.6 A mg for GOR, 4.75-fold higher than that of commercial Pt black in an alkaline medium. Moreover, the h-PtBi/f-Pt@Fe PNPs achieve higher power density (125.8 mW cm) than commercial Pt/C (81.8 mW cm) in a single DGFC. The h-PtBi/f-Pt@Fe PNPs can also effectively catalyze the electrochemical oxidation of 1-propanol (17.1 A mg), 1,2-propanediol (7.2 A mg), and 1,3-propanediol (5.2 A mg). The in-situ Fourier-transform infrared spectra further reveal that the CC bond of glycerol, 1-propanol, 1,2-propanediol, and 1,3-propanediol was dissociated for the complete oxidation by the h-PtBi/f-Pt@Fe PNPs. This study provides a new class of porous Pt-based heterostructure nanoplates and insight into the intrinsic activity of different C3 alcohols.
高效的碳 - 碳键裂解和醇的完全氧化是提高可再生能源利用效率的关键。在此，我们通过一种简单的溶剂热法成功制备了具有丰富晶粒/相界面的多孔铁掺杂六方密堆积（hcp）-PtBi/面心立方（fcc）-Pt异质结构纳米片（h-PtBi/f-Pt@Fe PNPs）。开放的多孔结构、丰富的晶粒/相界面和堆垛层错缺陷，以及金属间化合物hcp-PtBi和fcc-Pt之间的协同效应，使h-PtBi/f-Pt@Fe PNPs成为直接甘油燃料电池（DGFCs）中甘油氧化反应（GOR）的有效电催化剂。值得注意的是，h-PtBi/f-Pt@Fe PNPs在碱性介质中对GOR表现出7.6 A mg的优异质量活性，比商业铂黑高4.75倍。此外，在单个DGFC中，h-PtBi/f-Pt@Fe PNPs实现了比商业Pt/C（81.8 mW cm）更高的功率密度（125.8 mW cm）。h-PtBi/f-Pt@Fe PNPs还能有效催化1-丙醇（17.1 A mg）、1,2-丙二醇（7.2 A mg）和1,3-丙二醇（5.2 A mg）的电化学氧化。原位傅里叶变换红外光谱进一步表明，h-PtBi/f-Pt@Fe PNPs使甘油、1-丙醇、1,2-丙二醇和1,3-丙二醇的碳 - 碳键断裂以实现完全氧化。本研究提供了一类新型的多孔铂基异质结构纳米片，并深入了解了不同C3醇的本征活性。
