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Citation: LI Li, WANG Yi-Jing, WANG Ya-Ping, REN Qiu-Li, JIAO Li-Fang, YUAN Hua-Tang. Effect of Ni Content in Co_1-xNi_xB Catalysts on Hydrogen Generation during Hydrolysis[J]. Acta Physico-Chimica Sinica, ;2010, 26(06): 1575-1578. doi: 10.3866/PKU.WHXB20100609 shu

Effect of Ni Content in Co_1-xNi_xB Catalysts on Hydrogen Generation during Hydrolysis

1.
Institute of New Energy Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Nankai University, Tianjin 300071, P. R. China

Received Date: 21 December 2009
Available Online: 20 April 2010

A series of Co1-xNixB alloy catalysts were synthesized in ethanol by chemical reduction in an ice-water bath. The catalytic hydrolysis of an alkaline NaBH4 solution was studied by changing the Ni content in the Co1-xNixB catalyst. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy revealed that the as-prepared Co1-xNixB alloys were ultrafine nanoparticles in amorphous form. Hydrogen generation measurements showed that the as-prepared Co1-xNixB alloys exhibited excellent catalytic activity. The hydrogen generation rate firstly increased as the Ni content increased in the Co1-xNixB catalyst, and it reached the highest at x=0.15, then decreased as x increased. The highest hydrogen generation rate at 298 K was 4228 mL·min-1·g-1 for Co0.85Ni0.15B during the catalytic hydrolysis of the alkaline sodium borohydride solution. The activation energies of the Co0.85Ni0.15B alloy and CoB were 31.87 and 34.25 kJ·mol-1, respectively. This showed that the Co1-xNixB alloys synthesized in ethanol had high activity.
- Catalyst,
- Sodiumborohydride,
- Hydrolysis,
- Co1-xNixB alloy,
- Hydrogen generation
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1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Effect of Ni Content in Co1-xNixB Catalysts on Hydrogen Generation during Hydrolysis

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通讯作者: 陈斌, bchen63@163.com

Effect of Ni Content in Co_1-xNi_xB Catalysts on Hydrogen Generation during Hydrolysis