Enhancement of catalytic activity of Raney nickel by cobalt addition |
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| Affiliation: | 1. Department of Chemical Engineering, Woosuk University, Chonbuk 565-701, South Korea;2. Department of Industrial Chemistry, Hanyang University, Seoul 133-791, South Korea;1. School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, PR China;2. School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, PR China;3. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China;4. State Key Laboratory of Porous Metal Materials, Northwest Institute for Non-ferrous Metal Research, Xi''an 710016, PR China;1. State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China;2. School of Metallurgy and Environment, Central South University, Changsha 410083, China;1. Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, China;2. Key Laboratory of Health Risk Appraisal for Trace Toxic Chemicals of Zhejiang Province, Ningbo Municipal Center for Disease Control and Prevention, Ningbo, Zhejiang, 315010, China;1. School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong 510006, China;2. Victory Giant Technology (Hui Zhou) Co., Ltd., Huizhou 516083, China |
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| Abstract: | The effects of cobalt as a promoter of the catalytic activity of Raney nickel for various manufacturing esses have been studied. The variation of particle size distribution, specific surface area and residual aluminium content can also affect the catalytic properties of Raney nickel. The characteristics of the catalyst are considerably influenced by the relative nickel and aluminium contents. When the catalysts are prepared from 60 wt.% nickel and 40 wt.% aluminium, the electrode performance shows the highest current density of 450 mA/cm2. With the addition of cobalt, the particle size is diminished from 13.92 to 11.70 μm and the decrease of the particle size contributes to a slight enlargement of the specific surface area. The mass activity of a hydrogen electrode manufactured with cobalt Raney nickel in alkaline solution is increased from 3.74 to 4.03 A/g when 120 mg/cm2 of catalyst are loaded in the electrode. |
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