Hydrogen generation by sodium borohydride hydrolysis on Co-B catalysts supported on cotton stalk-based activated carbon

QU Jianlin; HAN Min; ZHANG Xiuli; XU Xiufeng; GUO Qingjie

doi:10.11949/j.issn.0438-1157.20140645

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Hydrogen generation by sodium borohydride hydrolysis on Co-B catalysts supported on cotton stalk-based activated carbon

更新时间：2025-12-10

- Hydrogen generation by sodium borohydride hydrolysis on Co-B catalysts supported on cotton stalk-based activated carbon
- CIESC Journal Issue 1, Pages: 105-113(2015)
- 作者机构：
  
  1. 青岛科技大学化工学院, 清洁化工过程山东省高校重点实验室,山东,青岛,266042
  2. 烟台大学应用催化研究所,山东,烟台,264005
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20140645
  CLC： K91X712TQ426.65
- Online First：05 January 2015，
  
  Published：05 January 2015
- 稿件说明：
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QU Jianlin, HAN Min, ZHANG Xiuli, et al. Hydrogen generation by sodium borohydride hydrolysis on Co-B catalysts supported on cotton stalk-based activated carbon[J]. CIESC Journal, 2015, (1): 105-113.
DOI：

QU Jianlin, HAN Min, ZHANG Xiuli, et al. Hydrogen generation by sodium borohydride hydrolysis on Co-B catalysts supported on cotton stalk-based activated carbon[J]. CIESC Journal, 2015, (1): 105-113. DOI： 10.11949/j.issn.0438-1157.20140645.

摘要

采用棉杆生物质废弃物为原料、H3PO4为活化剂

在流化床中化学活化制备棉杆活性炭

并将其作为载体负载Co-B组分

制备了棉杆活性炭基Co-B催化剂(Co-B/C)。以该催化剂应用于硼氢化钠水解制氢

系统考察了活性炭活化条件(活化温度、活化时间、活化剂用量mH3PO4/mCS)、水解反应温度及催化剂循环使用次数对催化产氢性能的影响。同时

使用N2物理吸附、FTIR、XRD和SEM等技术对活性炭载体及催化剂进行了表征。结果表明:在活化温度500℃、活化时间1 h、mH3PO4/mCS为0.75条件下制得的活性炭载体

负载14.5%Co的催化剂表现出最佳催化性能:反应温度为25℃时

平均产氢速率可以达到12.06 L·min-1·(g Co)-1

催化剂表现了较高活性。催化产氢反应的活化能为44.61 kJ·mol-1。循环使用5次后

催化剂仍保持初次活性的54%。

Abstract

Cotton stalk-based activated carbons were prepared by phosphoric acid activation of cotton stalks (CS) in a fluidized bed. The Co-B catalysts supported on cotton stalk-based activated carbon were generated by the impregnation-chemical reduction method. Meanwhile

the prepared activated carbons and catalysts were characterized by nitrogen physisorption

FTIR

XRD and SEM. The effects of activation reaction parameters

reaction temperature and recycle times on hydrogen generating performance of the activated carbons supported Co-B catalysts were investigated. The optimal activation temperature

activation time and amount of activator (mH3PO4/mCS) for activation of cotton stalk were 500℃

1 h and 0.75

respectively. Under these conditions

the as-prepared Co-B/C catalyst with 14.5% (mass) Co exhibited the best hydrogen generating performance with an average rate of hydrogen generation up to 12.06 L·min-1·(g Co)-1 at 25℃. Activation energy of hydrogen generation reaction on such catalyst was estimated to be 44.61 kJ·mol-1. After five cycles

the catalyst retained 54% initial activity

exhibiting high activity and stability.

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