钴-硼/二氧化锆催化剂催化硼氢化钠水解制氢研究

Abstract

Abstract:

Co-B/ZrO₂ catalyst was prepared by impregnation-reduction method,and the activity of the catalyst in the hydr-olysis of sodium borohydride to produce hydrogen was systematically investigated.The influences of the amount of substance ratio of the active component Co and the support ZrO₂[n（Co）/n（ZrO₂）] as well as the amount of substance ratio of the active component and the reducing agent[n（Co）/n（NaBH₄）] on catalytic performance were investigated.The effects of the amount of catalyst,reaction temperature and stirring speed on hydrolysis of sodium borohydride were also studied.The results showed that the Co-B/ZrO₂ catalyst prepared with 0.16:1 of n（Co）/n（ZrO₂） and 1:5 of n（Co）/n（NaBH₄） gave the fastest rate of sodium borohydride hydrolysis.The hydrogen evolution rate of sodium borohydride increased with the increasing amount of catalyst and the reaction temperature.With the increase of the stirring rate,the hydrogen production rate increased firstly and then decreased.The reaction kinetics of Co-B/ZrO₂ catalyst for the hydrolysis of sodium borohydride was the zero-order reaction for sodium borohydride concentration.The activation energy of the sodium borohydride was 43.97 kJ/mol for the Co-B/ZrO₂ supported catalyst.

Key words: Co-B catalyst, sodium borohydride hydrolysis, hydrogen production

CLC Number:

TQ138.12

Sun Haijie,Chen Lingxia,Zhang Yufeng,An Dongdong,Liu Cong. Performance of Co-B/ZrO₂ catalyst for hydrogen generation from catalytic hydrolysis of sodium borohydride solution[J]. Inorganic Chemicals Industry, 2019, 51(3): 72-76.

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References 15

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催化剂种类	活化能/ （kJ·mol^-1）	催化剂种类	活化能/ （kJ·mol^-1）
Co-B/ZrO₂	43.97	Co-B/棒状丝光沸石^[15]	53.18
Co-B/棉杆活性炭^[5]	44.61	Co-B/USY^[13]	65.90
Co-B/ZIF-7^[14]	51.48	Co-B^[15]	73.37

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Performance of Co-B/ZrO₂ catalyst for hydrogen generation from catalytic hydrolysis of sodium borohydride solution

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