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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

대한화학회 제121회 학술발표회 및 총회 Synthesis of Ni(OH)2 Cluster-Decorated Pt Nanocubes and Their Electrocatalytic Activity towards the Hydrogen Evolution Reaction in an Alkaline Electrolyte

2018년 2월 7일 10시 39분 45초
INOR.P-112 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
Youngmin Hong, Sang-Il Choi*
Department of Chemistry, Kyungpook National University, Korea
The hydrogen evolution reaction (HER) is a critical step in many industrial processes, including water electrolysis, metal deposition, corrosion, and fuel production from CO2 reduction. In particular, the production of H2 through the HER in water electrolyzers has recently received large attention due to the increasing demand for H2 gas as a key energy source for renewable energy systems. Recently, Subbaraman and co-workers demonstrated that the Ni(OH)2 clusters electrochemically deposited on a Pt electrode could significantly enhance the HER in an alkaline medium due to a bifunctional mode. Specifically, the edges of oxophilic Ni(OH)2 clusters promote the dissociation of water and concomitant generation of Had that subsequently adsorbs on nearby Pt surfaces and finally recombines into molecular hydrogen (H2). This bifunctional approach presents a promising strategy for enhancing HER activity in an alkaline medium. In this work, we systematically studied the relationship between Pt nanocubes enclosed by {100} facets and different amounts of Ni(OH)2 deposited on Pt surfaces. Pt nanocubes were synthesized under CO gas atmosphere, and then Ni(OH)2 clusters were purposely formed on their surfaces. Well-controlled Ni(OH)2 clusters with different amounts on Pt nanocube surfaces showed Volcano-plot trend of HER activity in a KOH electrolyte.