A new cathode using CeO2/MWNT for hydrogen peroxide synthesis through a fuel cell
来源期刊：JOURNAL OF RARE EARTHS2009年第1期
论文作者：XU Yuan XU Fuyuan CHEN Yingwen ZHU Shemin SONG Tianshun SHEN Shubao
Key words：hydrogen peroxide; fuel cell; MWNT; cerium oxide; rare earths;
Abstract: Catalyst using CeO2/MWNT (multi-walled carbon nanotube) was prepared by chemical deposition method and was applied to prepare the cathode of fuel cell for hydrogen peroxide synthesis. Effect of catalyst loading, flow rate of aqueous solution, and KOH concentration on hydrogen peroxide synthesis were investigated. Experimental results indicated that hydrogen peroxide concentration approached 275 mmol/L given 25% of CeO2/MWNT, 18 ml/h of aqueous solution, and 5 mol/L of KOH concentration. Moreover, the reaction mechanism was further discussed. The results indicated that MWNT and cerium oxide were the synergism to produce hydrogen peroxide. Increase of KOH concentration not only reduced the apparent cell resistance but also increased the open-circuit voltage.
XU Yuan1，XU Fuyuan1，CHEN Yingwen1，ZHU Shemin2，SONG Tianshun1，SHEN Shubao1
(1.National Engineering Research Centre for Biochemistry, Nanjing University of Technology, Nanjing 210009, China;
2.College of Materials Science and Engineering Nanjing University of Technology Nanjing 210009 China)
Abstract:Catalyst using CeO2/MWNT (multi-walled carbon nanotube) was prepared by chemical deposition method and was applied to prepare the cathode of fuel cell for hydrogen peroxide synthesis. Effect of catalyst loading, flow rate of aqueous solution, and KOH concentration on hydrogen peroxide synthesis were investigated. Experimental results indicated that hydrogen peroxide concentration approached 275 mmol/L given 25% of CeO2/MWNT, 18 ml/h of aqueous solution, and 5 mol/L of KOH concentration. Moreover, the reaction mechanism was further discussed. The results indicated that MWNT and cerium oxide were the synergism to produce hydrogen peroxide. Increase of KOH concentration not only reduced the apparent cell resistance but also increased the open-circuit voltage.
Key words:hydrogen peroxide; fuel cell; MWNT; cerium oxide; rare earths;
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