Ultra-thin layer structured anodes for highly durable Iow-Pt direct formic acid fuel cells  

作　　者：RongyueWang Jianguo Liu Pan Liu Xuanxuan Bi Xiuling Yan Wenxin Wang Yifei Meng Xingbo Ge Mingwei Chen Yi Ding 

机构地区：[1]Center for Advanced Energy Materials & Technology Research (AEMT), and School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China [2]Eta-Materials and Renewable Energy Research Center, Department of Materials Science and Engineering, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China [3]WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan [4]Resources and Ecologic Research Institute, School of Chemistry and Bioscience, Yili Normal University, Yining 835000, China

出　　处：《Nano Research》2014年第11期1569-1580,共12页纳米研究（英文版）

摘　　要：Direct formic acid fuel cells （DFAFCs） allow highly efficient low temperature conversion of chemical energy into electricity and are expected to play a vital role in our future sustainable society. However, the massive precious metal usage in current membrane electrode assembly （MEA） technology greatly inhibits their actual applications. Here we demonstrate a new type of anode constructed by confining highly active nanoengineered catalysts into an ultra-thin catalyst layer with thickness around 100 nm. Specifically, an atomic layer of platinum is first deposited onto nanoporous gold （NPG） leaf to achieve high utilization of Pt and easy accessibility of both reactants and electrons to active sites. These NPG-Pt core/shell nanostructures are further decorated by a sub-monolayer of Bi to create highly active reaction sites for formic acid electro-oxidation. Thus obtained layer-structured NPG-Pt-Bi thin films allow a dramatic decrease in Pt usage down to 3 ~tg.cm-2, while maintaining very high electrode activity and power performance at sufficiently low overall precious metal loading. Moreover, these electrode materials show superior durability during half-year test in actual DFAFCs, with remarkable resistance to common impurities in formic acid, which together imply their great potential in applications in actual devices.

关 键 词：direct formic acid fuel cells low-Pt loading core/shell structures nanoporous gold DEALLOYING 

分 类 号：TQ225.121[化学工程—有机化工] TM911.4[电气工程—电力电子与电力传动]