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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received March 1, 2012
Accepted April 10, 2012

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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NaBH4 가수분해용 Co-P-B/Cu 촉매의 내구성

Durability of Co-P-B/Cu Catalyst for NaBH4 Hydrolysis Reaction

황병찬 조아라 신석재¹ 최대기¹ 남석우¹ 박권필^†

Byungchan Hwang Ara Jo Sukjae Sin¹ Daeki Choi¹ Sukwoo Nam¹ Kwonpil Park^†

순천대학교 화학공학과, 540-742 전남 순천시 매곡동 315 ¹한국과학기술연구원 연료전지센터, 136-791 서울 성북구 하월곡동 39-1

Department of Chemical Engineering, Sunchon National University, 315 Maegok-dong, Suncheon-si, Jeonnam 540-742, Korea ¹Fuel Cell Research Center, Korea Institute of Science and Technology, 39-1 Hawolkok-dong, Seongbuk-gu, Seoul, 136-791, Korea

parkkp@sunchon.ac.kr

Korean Chemical Engineering Research, August 2012, 50(4), 627-631(5), NONE Epub 25 July 2012

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Abstract

휴대용 고분자전해질 연료전지의 수소발생용으로써 NaBH4는 많은 장점을 갖고 있다. 본 연구에서는 NaBH4 가수분해 반응용 Co-P-B/Cu 촉매의 내구성에 대해 연구하였다. Co-P-B/Cu 촉매의 내구성 미치는 반응 온도, NaBH4 농도, NaOH 농도, 촉매 소성온도 등의 영향에 대해 실험하였다. 촉매의 내구성은 가수분해 반응 중에 발생하는 gel 형성에 영향을 받았다. 즉 gel 형성에 의해 촉매 손실률이 증가하였다. NaBH4 농도가 고농도일 때는 60 ℃ 이상에서는 gel 형성이 안 되어 촉매 손실률이 낮았다. 그러나 40 oC 이하에서는 gel이 형성되어 촉매 손실률이 증가했다. NaBH4 20 wt%, 40 ℃에서 NaOH 농도증가에 따라 겔이 형성되어 촉매 손실률이 증가함을 보였다. Co-P-B/Cu 촉매의 높은 온도에서 소성은 내구성을 향상시켰지만 촉매 활성을 감소시켰다.

Sodium borohydride, NaBH4, shows a number of advantages as hydrogen source for portable proton exchange membrane fuel cells (PEMFCs). The durability of Co-P-B/Cu catalyst for sodium borohydride hydrolysis reaction was studied. The effect of reaction temperature, NaBH4 concentration, NaOH concentration and calcination temperature of catalyst on the durability of Co-P-B/Cu catalyst were measured. The gel formed during hydrolysis reaction affected the durability of catalyst (loss of catalyst). Formation of gel increased the loss of the catalyst. When NaBH4 concentration was high and reaction temperature was higher than 60 ℃, loss of catalyst was low because gel was not formed. But under the temperature of 40 ℃, loss of catalyst increased due to gel formation When NaBH4 concentration was 40 weight % and the reaction temperature was 40 ℃, the loss of catalyst increased as the NaOH concentration increased. As the calcination temperature of catalyst decreased, the loss of catalyst decreased and the activity of catalyst decreased. Calcination of the catalyst at high temperature enhanced the durability of catalyst but diminished the activity of catalyst.

Keywords

Sodium Borohydride Durability Catalyst Co-P-B Hydrolysis Fuel Cell

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