Ultrathin and defect-rich intermetallic Pd2Sn nanosheets for efficient oxygen reduction electrocatalysis,Journal of Materials Chemistry A

当前位置： X-MOL 学术 › J. Mater. Chem. A › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Ultrathin and defect-rich intermetallic Pd2Sn nanosheets for efficient oxygen reduction electrocatalysis
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-04-03 , DOI: 10.1039/d0ta01767a
Jiashun Liang _{1,

2,

3,

4,

5} , Shenzhou Li _{1,

2,

3,

4,

5} , Yawei Chen _{5,

6,

7,

8,

9} , Xuan Liu _{1,

2,

3,

4,

5} , Tanyuan Wang _{1,

2,

3,

4,

5} , Jiantao Han _{1,

2,

3,

4,

5} , Shuhong Jiao _{5,

6,

7,

8,

9} , Ruiguo Cao _{5,

6,

7,

8,

9} , Qing Li _{1,

2,

3,

4,

5}

Affiliation

Atomic ordering engineering has been a promising strategy to improve the catalytic activity and stability of Pt-based alloy catalysts for the oxygen reduction reaction (ORR) for proton exchange membrane fuel cells (PEMFCs). However, the synthesis of shape-controlled ordered nanocrystals, especially in a two-dimensional (2D) architecture, still remains a great challenge. Herein, 2D Pd₂Sn nanosheets (NSs) with unique Pd–Sn ordering are developed as efficient ORR electrocatalysts for the first time. The ordered Pd₂Sn NSs exhibit a mass activity of 2.5 A mg_Pd⁻¹ at 0.9 V_iR-freevs. the reversible hydrogen electrode and outstanding durability, much superior to that of their disordered counterparts, commercial Pt/C, and most of the reported Pd-based ORR catalysts. The outstanding activity and stability can be ascribed to the unique 2D defect-rich morphology, the thermodynamically stabilized intermetallic structure, and the optimized Pd–O binding due to Sn incorporation.

中文翻译：

超薄且富缺陷的金属间Pd2Sn纳米片，用于高效氧还原电催化

原子有序工程学一直是一种有前途的策略，可以提高质子交换膜燃料电池（PEMFC）的氧还原反应（ORR）的Pt基合金催化剂的催化活性和稳定性。然而，形状控制的有序纳米晶体的合成，特别是在二维（2D）结构中，仍然是巨大的挑战。在此，具有独特的Pd-Sn有序性的2D Pd ₂ Sn纳米片（NSs）首次被开发为有效的ORR电催化剂。有序的Pd ₂的Sn表现出的NS 2.5 A毫克的质量活性_的Pd^-1在0.9伏_{IR -free}与可逆氢电极和出色的耐久性，远远优于无序的氢电极，市售Pt / C和大多数报道的基于Pd的ORR催化剂。出色的活性和稳定性可归因于独特的2D缺陷富集形态，热力学稳定的金属间结构以及由于掺入Sn而优化的Pd–O结合。

更新日期：2020-04-03

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11