發(fā)布時(shí)間：2018-07-04 07:05

  本文選題：泡沫鎳 + Ru催化劑�。� 參考：《電源技術(shù)》2017年04期

【摘要】：針對(duì)硼氫化鈉粉末狀制氫催化劑易流失、物料傳輸難、反應(yīng)產(chǎn)物易覆蓋、催化劑利用率低的問(wèn)題,采用化學(xué)鍍制備了泡沫鎳負(fù)載的Ru催化劑,借助掃描電子顯微鏡(SEM)、能量散射光譜(EDS)、X射線光電子光譜法(XPS)等技術(shù)分析了泡沫鎳載Ru催化劑使用前后的微觀形貌結(jié)構(gòu)與表面元素組分,研究了鍍液濃度、鍍液溫度、硼氫化鈉反應(yīng)液溫度對(duì)催化劑的催化制氫活性的影響,剖析了催化劑循環(huán)使用過(guò)程中活性衰減的原因。結(jié)果表明:泡沫鎳載體的使用提高了Ru催化劑的催化活性,有效地改善了NaBH_4水解制氫體系中反應(yīng)物和產(chǎn)物的物料傳輸,催化反應(yīng)的活化能為40.8kJ/mol。循環(huán)使用20次后,催化劑的催化活性仍為初次活性的76.3%,顯示了良好的催化穩(wěn)定性。
[Abstract]:In view of the problems of sodium borohydride powder catalyst for hydrogen production, which is easy to lose, difficult to transport, easy to cover the reaction products and low utilization of catalyst, the Ru catalyst supported on nickel foam was prepared by electroless plating. By means of scanning electron microscope (SEM), energy scattering spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS), the microstructure and surface element composition of nickel foam Ru catalyst before and after application were analyzed. The concentration of bath and bath temperature were studied. The effect of the reaction temperature of sodium borohydride on the catalytic activity of the catalyst for hydrogen production was studied. The results show that the catalytic activity of Ru catalyst is improved by the use of nickel foam carrier, and the material transport of reactants and products in NaBH4 hydrolysis hydrogen production system is effectively improved. The activation energy of catalytic reaction is 40.8 kJ / mol. After 20 cycles, the catalytic activity of the catalyst is 76.3wt% of the initial activity, which shows good catalytic stability.
【作者單位】： 江蘇師范大學(xué)物理與電子工程學(xué)院;
【基金】：江蘇師范大學(xué)研究生科研創(chuàng)新計(jì)劃重點(diǎn)項(xiàng)目(2014YZD011) 江蘇省研究生科研創(chuàng)新計(jì)劃項(xiàng)目(KYZZ15_0384) 徐州市科技計(jì)劃項(xiàng)目(KC16SG25) 國(guó)家自然科學(xué)基金(21606115)
【分類號(hào)】：TQ116.2;TM911.4

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