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个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:美国新墨西哥大学
学位:博士
所在单位:化工学院
学科:化学工程
办公地点:大连理工大学西部校区化工综合楼D501
联系方式:yjsong@dlut.edu.cn 0411-84986485
电子邮箱:yjsong@dlut.edu.cn
论文成果
当前位置: 大连理工大学能源... >> 科学研究 >> 论文成果Synthesis of core/shell structured Pd3Au@Pt/C with enhanced electrocatalytic activity by regioselective atomic layer deposition combined with a wet chemical method
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论文类型:期刊论文
发表时间:2016-01-01
发表刊物:RSC ADVANCES
收录刊物:SCIE、EI
卷号:6
期号:71
页面范围:66712-66720
ISSN号:2046-2069
摘要:We report the synthesis of Pd3Au@Pt/C by atomic layer deposition (ALD) combined with a wet chemical method. Initially, nearly uniform Pd3Au nanoparticles (NPs) (similar to 4.7 nm) supported on carbon with a loading of similar to 20 wt% were prepared by reducing metal complexes confined in reverse micelles adsorbed on carbon. Next, a Pt thin layer (less than 1 nm) was selectively deposited on purified Pd3Au particles instead of on carbon by regioselective ALD that likely arises from the coverage of nucleation sites on carbon by surfactant molecules in conjunction with catalytic decomposition of the Pt precursor on Pd3Au. The resulting core-shell structured material was subject to TEM, HAADF-STEM/EDX, XRD, XPS and electrochemical measurements. Interestingly, Pd3Au@Pt/C demonstrates a significantly improved electrocatalytic activity toward both formic acid oxidation reaction (FAOR) and oxygen reduction reaction (ORR) compared with Pd3Au/C and state-of-the art Pt/C. This study opens up a unique avenue for the synthesis core/shell structured materials with potential applications in catalysis, electrocatalysis, and so on.