Fe-doped PtBi/Pt heterostructured nanoplates

4.75× mass activity for C3 alcohol oxidation

Porous Fe-doped hcp-PtBi/fcc-Pt heterostructured nanoplates with abundant grain/phase interfaces enabling efficient C-C bond cleavage for complete C3 alcohol electrooxidation.

Yang, Xiaotong · Zhe, Zheng · Zhang, Yuehuan · Yuan, Qiang

Journal of Colloid and Interface Science 2024

Specifications

Glycerol oxidation mass activity

{'zh': '7.6', 'en': '7.6'} A mgPt⁻¹

1-Propanol oxidation mass activity

{'zh': '17.1', 'en': '17.1'} A mgPt⁻¹

1,2-Propanediol oxidation mass activity

{'zh': '7.2', 'en': '7.2'} A mgPt⁻¹

1,3-Propanediol oxidation mass activity

{'zh': '5.2', 'en': '5.2'} A mgPt⁻¹

DGFC power density

{'zh': '125.8', 'en': '125.8'} mW cm⁻²

Advantages

Much higher mass activity

Glycerol oxidation mass activity reaches 7.6 A mgPt⁻¹, 4.75 times that of commercial Pt black, greatly reducing precious metal loading.

Higher device power density

Achieves a power density of 125.8 mW cm⁻² in a single DGFC, surpassing commercial Pt/C at 81.8 mW cm⁻², yielding stronger device output.

Versatile across C3 alcohols

Also effectively oxidizes 1-propanol (17.1 A mgPt⁻¹), 1,2-propanediol (7.2 A mgPt⁻¹), and 1,3-propanediol (5.2 A mgPt⁻¹), with C-C bond dissociation for complete oxidation.

Enhanced C-C bond cleavage

In-situ FTIR spectra confirm C-C bond dissociation for complete oxidation of C3 alcohols, improving fuel utilization.

Applications

• Direct glycerol fuel cells：As anode catalyst to boost DGFC power density.
• Alcohol electrooxidation：Enable complete C3 alcohol oxidation via efficient C-C cleavage.
• Fuel cell electrocatalysts：Replace commercial Pt/C with higher Pt mass activity.
• Pt-based heterostructured catalysts：Exploit grain/phase interfaces to tune surface electronic structure.