摘要
采用微波辅助还原法制备出高活性碳载PdAu电催化剂,催化剂中Pd与Au能够形成合金,改变了催化剂表面活性组分的电子结构。使用十二烷基苯磺酸钠和P123表面活性剂制备出的催化剂能够不同程度地促进催化剂中活性粒子的分散,且大幅度提高催化剂对甲酸氧化的电催化活性和稳定性,其中使用表面活性剂P123制备的催化剂对甲酸氧化的峰电流密度可达到196.8×10-3A/cm2,甲酸氧化4030 s后的稳定电流密度可达21.6×10-3A/cm2。CO类强吸附物种在电极表面的吸附依然是电流衰减的主要原因。
The carbon-supported PdAu （PdAu/C） catalysts are prepared using surfactants of sodium dodecylbenzene sulfonate and P123 via a microwave-assisted reduction method. The results showed that Pd and Au could form alloys and altered the electronic structure of the catalysts＇ surfaces. The activity and stability of the catalysts were greatly enhanced by using surfaetants in the their preparation as the surfactants can improve the dispersions of metallic particles on the catalysts＇ surface as well as increase the proportion of highly active crystal planes. The peak current density on PdAu/C prepared in nonionic surfactant P123 was as high as 196. 8 x 10-3 A/cm2 and the pseudo-steady current density after 4030 s was 21.6 x 10-3 A/cra2. The strong GO adsorption by the noble metals on the catalyst remained remained as the major reason for the decrease of the oxidation current.
出处
《应用化学》
CAS
CSCD
北大核心
2012年第10期1189-1193,共5页
Chinese Journal of Applied Chemistry
基金
黑龙江省自然科学基金(B200905)
哈尔滨市科技局创新人才专项基金(2010RFXXG018)
黑龙江省高校科技创新团队建设计划(2011TD010)资助项目
关键词
微波辅助还原法
Pd
Au
电化学催化
甲酸
表面活性剂
microwave-assisted reduction, Pd, Au, electrochemical catalysis, fomic acid, surfactant
