Trace Pd modified intermetallic PtBi nanoplates towards efficient formic acid 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.)

Trace Pd modified intermetallic PtBi nanoplates towards efficient formic acid electrocatalysis
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2021-3-24 , DOI: 10.1039/d1ta01123e
Min Tang _{1,

2,

3,

4,

5} , Wen Chen _{1,

2,

3,

4,

5} , Shuiping Luo _{1,

2,

3,

4,

5} , Xiaotong Wu _{1,

2,

3,

4,

5} , Xiaokun Fan _{1,

2,

3,

4,

5} , Yujia Liao _{1,

2,

3,

4,

5} , Xing Song _{1,

2,

3,

4,

5} , Yu Cheng _{1,

2,

3,

4,

5} , Lanxi Li _{1,

2,

3,

4,

5} , Li Tan _{1,

2,

3,

4,

5} , Yulian Liu _{1,

2,

3,

4,

5} , Zewei Quan _{1,

2,

3,

4,

5}

Affiliation

Promoting formic acid electrochemical oxidation through the dehydrogenation path is critical for the development of direct liquid fuel cells. Herein, we report the modification of intermetallic PtBi hexagonal nanoplates by depositing trace amounts of Pd atoms (PtBi@1.8% Pd HNPs) to obviously improve the selectivity of the dehydrogenation path instead of the dehydration path, achieving highly efficient formic acid electrocatalysis. Impressively, PtBi@1.8% Pd exhibits superior mass activity of 4.17 A mg_Pt+Pd⁻¹, which is 27 and 9.6 times higher than that of commercial Pt/C and Pd black catalysts, respectively. During chronoamperometry measurements, PtBi@1.8% Pd maintains much higher mass activity than the benchmark catalysts. The excellent electrocatalytic performances are attributed to the synergetic effect between the tensile-strained/electronic-modified Pd and the electronic-modified intermetallic PtBi, providing a novel co-modification strategy to boost electrocatalysis.

中文翻译：

痕量Pd修饰的金属间PtBi纳米板对甲酸的高效电催化作用

通过脱氢途径促进甲酸电化学氧化对于直接液体燃料电池的开发至关重要。本文中，我们报道了通过沉积痕量的Pd原子（PtBi@1.8% Pd HNPs）来修饰金属间PtBi六角形纳米板，以明显改善脱氢途径而不是脱水途径的选择性，实现高效甲酸电催化的方法。令人印象深刻的是，PtBi @ 1.8％Pd的质量活性为4.17 A mg _{Pt + Pd}^-1分别比市售Pt / C和Pd黑色催化剂高27倍和9.6倍。在计时电流法测量过程中，PtBi @ 1.8％Pd的质量活性比基准催化剂高得多。优异的电催化性能归因于拉伸应变/电子修饰的Pd与电子修饰的金属间化合物PtBi之间的协同作用，从而提供了一种新型的共修饰策略来增强电催化作用。

更新日期：2021-04-06

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南