Layer Orientation-Engineered Two-Dimensional Platinum Ditelluride for High-Performance Direct Alcohol Fuel Cells,ACS Energy Letters

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Layer Orientation-Engineered Two-Dimensional Platinum Ditelluride for High-Performance Direct Alcohol Fuel Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2021-09-09 , DOI: 10.1021/acsenergylett.1c01776
Jinfa Chang ₁ , Tae-Jun Ko ₁ , Minyeong Je ₂ , Hee-Suk Chung ₃ , Sang Sub Han _{1,

4} , Mashiyat Sumaiya Shawkat _{1,

5} , Mengjing Wang ₁ , Sang Jin Park ₆ , Seung Min Yu ₃ , Tae-Sung Bae ₃ , Myoung-Woon Moon ₆ , Kyu Hwan Oh ₄ , Heechae Choi ₂ , Yang Yang _{1,

7,

8,

9} , Yeonwoong Jung _{1,

5,

7}

Affiliation

Platinum (Pt) has been considered the best catalyst for oxygen reduction reaction (ORR) based-direct liquid fuel cells (DLFCs). However, its high cost and the mixed potential issue have been obstacles for commercialization. Herein, we report a new Pt-based catalyst of two-dimensionally layered platinum ditelluride (2D PtTe₂) with mixed layer orientation, termed M-PtTe₂. This material constitutes vertically- and horizontally aligned 2D PtTe₂ layers, which synergistically boost the ORR reaction; the former promotes O₂ adsorption and electron transfer, while the latter boosts O–O bond breaking and O–H bond coupling. The M-PtTe₂ synthesized on nanostructured carbon papers significantly surpasses the ORR performances of commercial Pt/C, yielding 2.4-times higher mass activity in half-cell and 2-times higher maximum power density in actual devices. Furthermore, it exhibits extremely low alcohol adsorption energies, unveiling unprecedented suitability for alcohol-tolerant DLFCs. This new understanding of the role of the 2D layer orientation in ORR kinetics and thermodynamics suggests useful catalyst design principles.

中文翻译：

用于高性能直接醇燃料电池的层取向设计的二维二碲化铂

铂 (Pt) 被认为是基于直接液体燃料电池 (DLFC) 的氧还原反应 (ORR) 的最佳催化剂。然而，其高成本和混合潜在问题一直是商业化的障碍。在此，我们报告了一种具有混合层取向的二维层状二碲化铂 (2D PtTe ₂ )的新型 Pt 基催化剂，称为 M-PtTe ₂。这种材料构成了垂直和水平排列的 2D PtTe ₂层，可协同促进 ORR 反应；前者促进 O ₂吸附和电子转移，而后者促进 O-O 键断裂和 O-H 键耦合。M-PtTe ₂在纳米结构碳纸上合成的材料显着超过了商业 Pt/C 的 ORR 性能，在半电池中产生了 2.4 倍的质量活性，在实际设备中产生了 2 倍的最大功率密度。此外，它表现出极低的酒精吸附能，揭示了对耐酒精 DLFC 的前所未有的适用性。这种对二维层取向在 ORR 动力学和热力学中作用的新理解表明了有用的催化剂设计原则。

更新日期：2021-10-08

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