Self-Assembling PDDA on Graphene to Surfactant-Free Synthesize Uniform and Ultra-Small Pd Nanocrystals by Direct CO Reduction for Efficient Catalyst Toward Formic Acid Oxidation

被引：0

作者：

Liu, Ze ^{[1
]}

Zhang, Lian Ying ^{[1
,3
]}

Wang, Yi ^{[4
]}

Zhao, Zhiliang ^{[1
]}

Li, Chang Ming ^{[1
,2
,4
]}

机构：

[1] Southwest Univ, Fac Mat & Energy, Inst Clean Energy & Adv Mat, Chongqing 400715, Peoples R China

[2] Suzhou Univ Sci & Technol, Inst Mat Sci & Devices, Suzhou 215011, Peoples R China

[3] Qingdao Univ, Inst Energy & Environm Mat, Qingdao 266071, Peoples R China

[4] Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China

来源：

CHEMISTRYSELECT | 2017年 / 2卷 / 10期

基金：

中国博士后科学基金;

关键词：

Fuel Cells; Heterogeneous catalysis; Palladium; Graphene; Supported catalysts; FACILE SYNTHESIS; NANOPARTICLES; PERFORMANCE; ELECTROCATALYST; NANOSTRUCTURES; STABILITY;

D O I：

10.1002/slct.201700599

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Herein a facile strategy to self-assemble PDDA on graphene for surfactant-free synthesizing uniform and ultra-small Pd nano-crystals (Pd@PDDA-G, average size of 3.4 nm) by direct CO reduction has been accomplished. The as-prepared Pd@PDDA-G catalyst exhibits much more negative half-wave potential than the commercial Pd/C and Pd@G without using PDDA by 40 mV and 15 mV as well as much higher peak current density than latters by 2.5 and 2 times, respectively toward formic acid oxidation, demonstrating superior electrocatalytic activity. In addition, the catalyst presents better stability than both Pd@G and commercial Pd/C. The electrocatalytic enhancement mechanism could be attributed to produced uniformly ultra-small and clean Pd nanocrystals on porous graphene for high reaction surface area and fast interfacial electron transfer process. This work also offers a universal route to prepare other high performance catalysts for broad applications in energy systems and sensing devices.

引用

页码：3110 / 3116

页数：7