활성탄 담지 Co-B/C, Co-P-B/C 촉매를 이용한 NaBH4 가수분해 반응 (Hydrolysis Reaction of NaBH4 Using Activated Cabon Supported Co-B/C, Co-P-B/C Catalyst)

서지정보

· 발행기관 : 한국화학공학회
· 수록지 정보 : Korean Chemical Engineering Research(HWAHAK KONGHAK) / 56권 / 5호 / 641 ~ 646페이지
· 저자명 : 오소형, 김유겸, 배효준, 김동호, 변영환, 안호근, 박권필

초록

휴대용 고분자전해질 연료전지의 수소발생용으로써 NaBH4는 많은 장점을 갖고 있다. 본 연구에서는 활성탄 담지Co-B/C, Co-P-B/C 촉매의 NaBH4 가수분해 특성에 대해 연구하였다. 촉매의 BET 표면적, 수소 수율, NaBH4 농도 영향, 촉매 내구성 등을 실험하였다. 활성탄에 담지시킴으로써 BET 면적이 비담지 촉매에 비해 2~3배 증가해 500 m2/g 이상이 되었다. 활성탄 담지 촉매의 수소발생이 비담지 촉매보다 더 안정적이었다. 20 wt% NaBH4에서 활성화 에너지가 59.4 kJ/mol로 Co-P-B/FeCrAlloy 촉매 보다 14% 낮았다. 활성탄 담지 촉매가 비담지 촉매에 비해 촉매 손실이1/3~1/2로 감소해 활성탄에 촉매를 담지시킴으로써 내구성을 향상시킬 수 있었다.

영어초록

Sodium borohydride, NaBH4, shows a number of advantages as hydrogen source for portable proton exchange membrane fuel cells (PEMFCs). Properties of NaBH4 hydrolysis reaction using activated carbon supported Co-B/C, Co-P-B/C catalyst were studied. BET surface area of catalyst, yield of hydrogen, effect of NaBH4 concentration and durability of catalyst were measured. The BET surface area of carbon supported catalyst was over 500 m2/g and this value was 2~3 times higher than that of unsupported catalyst. Hydrogen generation of activated carbon supported catalyst was more stable than that of unsupported catalyst. The activation energy of Co-P-B/C catalyst was 59.4 kJ/mol in 20 wt% NaBH4 and 14% lower than that of Co-P-B/FeCrAlloy catalyst. Catalyst loss on activated carbon supported catalyst was reduced to about 1/3~1/2 compared with unsupported catalyst, therefore durability was improved by supporting catalyst on activated carbon.

참고자료

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