초록문의 abstract@kcsnet.or.kr

결제문의 member@kcsnet.or.kr

현재 가능한 작업은 아래와 같습니다.
  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 An efficient and pH-universal ruthenium-based catalyst for the hydrogen evolution reaction

2018년 3월 12일 16시 28분 26초
KCS.O-12 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 11시 : 43분
KCS - Oral Presentation for 2018 DOW Chemical Korea Award
저자 및
Javeed Mahmood, Feng Li, Sun-Min Jung, Mahmut Sait Okyay1, Ishfaq Ahmad, Seok-Jin Kim, Noejung Park1,*, Hu Young Jeong2,*, Jong-Beom Baek*
School of Energy and Chemical Engineering, Centre for Dimension-Controllable Organic Frameworks, Korea
1School of Natural Science, Ulsan National Institute of Science and Technology, Korea
2UNIST Central Research Facilities, Ulsan National Institute of Science and Technology, Korea
The hydrogen evolution reaction (HER) is a crucial step in electrochemical water splitting and demands an efficient, durable and cheap catalyst if it is to succeed in real applications. For an energy-efficient HER, a catalyst must be able to trigger proton reduction with minimal overpotential and have fast kinetics. The most efficient catalysts in acidic media are platinum-based, as the strength of the Pt–H bond is associated with the fastest reaction rate for the HER. The use of platinum, however, raises issues linked to cost and stability in non-acidic media. Recently, non-precious-metal-based catalysts have been reported, but these are susceptible to acid corrosion and are typically much inferior to Pt-based catalysts, exhibiting higher overpotentials and lower stability. As a cheaper alternative to platinum, ruthenium possesses a similar bond strength with hydrogen (∼65 kcal mol–1), but has never been studied as a viable alternative for a HER catalyst. Here, we report a Ru-based catalyst for the HER that can operate both in acidic and alkaline media. Our catalyst is made of Ru nanoparticles dispersed within a nitrogenated holey two-dimensional carbon structure (Ru@C2N). The Ru@C2N electrocatalyst exhibits high turnover frequencies at 25 mV (0.67 H2 s−1 in 0.5 M H2SO4 solution; 0.75 H2 s−1 in 1.0 M KOH solution) and small overpotentials at 10 mA cm–2 (13.5 mV in 0.5 M H2SO4 solution; 17.0 mV in 1.0 M KOH solution) as well as superior stability in both acidic and alkaline media. These performances are comparable to, or even better than, the Pt/C catalyst for the HER.