化工学报Issue(10)：3891-3898,8.DOI:10.3969/j.issn.0438-1157.2014.10.020
PEMFC用Pt纳米线阴极催化剂的制备及在电堆中的应用
Preparation of Pt nanowires as cathode catalyst for PEMFC and its application in stack
摘要
Abstract
Carbon supported platinum nanowires (Pt NWs/C), acting as cathode catalyst for proton exchange membrane fuel cell (PEMFC), were synthesized by reducing H2PtCl6 with HCOOH at room temperature without assistance of template. The catalyst microstructure and morphology were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The Pt NWs/C had an average cross-sectional diameter of (4.0±0.2) nm and a length of 15-25 nm. Good electrocatalytic performance and oxygen reduction reaction (ORR) of the as-prepared catalyst was characterized by cyclic voltammetry (CV) and linear sweep voltammetry (LSV). Two membrane electrode assemblies (MEAs) were fabricated, with Pt NWs/C and Pt/C as cathode catalyst respectively, and tested for comparison. The maximum power densities of Pt NWs/C and Pt/C, respectively were 705.6 mW·cm-2 and 674.4 mW·cm-2. Afterwards, an 18-cell stack with Pt NWs/C as cathode catalyst and a 20-cell stack with Pt/C as cathode catalyst were built for testing. Maximum power densities were 409.2 mW·cm-2 and 702.7 mW·cm-2, and coefficients of variation (Cv) of individual cell were 16.1% and 4.36% at the maximum power density, respectively. Data analysis indicated that Pt NWs/C for the cathode in a MEA exhibited good catalytic activity at a scale-up level, however, as compared with the commercial Pt/C catalyst, CV performance and uniformity should be improved. This work not only sheds light on the scale-up possibility of Pt NWs/C catalyst, but also provides a possibility for further durability test before its application in a fuel cell vehicle.关键词
燃料电池/碳载铂纳米线/催化剂/电化学Key words
fuel cells/carbon-supported Pt nanowires/catalyst/electrochemistry分类
信息技术与安全科学引用本文复制引用
常丰瑞,黄俭标,马建新,杨代军,李冰,严泽宇,顾荣鑫..PEMFC用Pt纳米线阴极催化剂的制备及在电堆中的应用[J].化工学报,2014,(10):3891-3898,8.基金项目
国家高技术研究发展计划项目（2012AA110501）；科技支撑项目(2013BAG15B00)；汉高基金教席。 （2013BAG15B00）
