摘要
室温下以氯化胆碱为稳定剂,用化学还原法合成了刺状Pd纳米粒子(Pdtnh0o0r0n).透射电子显微镜和电化学循环伏安研究结果表明Pdtnh0o0r0n具有较高密度的台阶位,与商业Pd黑催化剂相比较,Pdtnh0o0r0n对乙醇氧化的电催化活性显著提高,氧化电流密度是商业Pd黑催化剂的1.2倍(-0.40--0.30V)-1.5倍(-0.65--0.40V),起始氧化电位和峰电位均负移50mV.相同电流密度下,Pdtnh0o0r0n催化剂对乙醇的氧化电位均更低.
Thorn-like Pd nanoparticles （Pdtnh0o0r0n ） were synthesized at room temperature by a reduction of PdCl2 with L-ascorbic acid and with choline chloride as a stabilizer. Characterization of Pdtnh0o0r0n by transmission electron microscopy and cyclic voltammetry indicated that the synthesized Pd tnh0o0r0n has a relatively high density of surface step sites. By comparison with the commercially available Pd black catalyst, Pdtnh0o0r0n exhibits better catalytic activity towards ethanol oxidation. The oxidation current density on Pdtnh0o0r0n was 1.2 times （-0.40--0.30 V）-1.5 times （-0.65--0.40 V） as that on Pd black, and the onset potential and the peak potential of ethanol oxidation both shifted 50 mV in the negative direction. The oxidation potential of ethanol on Pdtnh0o0r0n is lower at the same current density.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2010年第8期2139-2143,共5页
Acta Physico-Chimica Sinica
基金
国家自然科学基金(20833005
20873116
60936003)
超分子结构和材料国家重点实验室(SKLSSM200910)资助项目~~
关键词
电催化
刺状结构
PD纳米粒子
台阶位
乙醇氧化
Electrocatalysis
Thorn-like structure
Pd nanoparticle
Step site
Ethanol oxidation
