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Ultrasmall Metal Particles Embedded in Nitrogen-doped Carbon for Electrocatalysis

Title
Ultrasmall Metal Particles Embedded in Nitrogen-doped Carbon for Electrocatalysis
Other Titles
전기 화학 촉매를 위한 질소 도핑 탄소가 함유된 금속 미립자 연구
Author
Zhen Lu
Advisor(s)
방진호
Issue Date
2017-08
Publisher
한양대학교
Degree
Master
Abstract
Platinum-based catalysts are critical to many important commercial chemical processes, but platinum utilization in these electrocatalysts is extremely low, as the active sites are only located on the surface of the catalyst particles. Downsizing catalyst nanoparticles to single atoms is highly desirable to maximize their efficiency by utilizing nearly all platinum atoms. However, making them is challenging. Here we report a novel method to produce isolated single platinum atoms by galvanic replacement between PtCl62- and Coo. XRD, TEM, HR-TEM, and EDS results conclude that the Pt can be controlled on a single atom scale. The single-atoms catalyst has higher stability which is strictly related to the N-doped porous carbon support. With reduced Pt loading weight, the synthesized single atoms dispersed catalyst is found to have higher mass activity for HER in both alkaline and acid electrolytes.
URI
http://dcollection.hanyang.ac.kr/jsp/common/DcLoOrgPer.jsp?sItemId=000000102052http://hdl.handle.net/20.500.11754/33358
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Theses (Ph.D.)
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