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New bifunctional carbon material of metal-free pomegranate peel catalyst and supercapacitor for highly efficient hydrogen production and energy storage
International Journal of Energy Research ( IF 4.6 ) Pub Date : 2021-09-20 , DOI: 10.1002/er.7294
Duygu Elma Karakaş 1
Affiliation  

In this study, pomegranate peel (PP) waste was used as an efficient, cost-effective, and metal-free catalyst for the methanolysis reaction of sodium borohydride (NaBH4); furthermore, the prepared active material was utilized as a supercapacitor for electricity storage. The effect of several parameters, such as different acid concentrations, burning temperature, and burning times on the catalytic performance of the pomegranate peel catalyst (PP-H3PO4-Cat) were examined. Under optimum conditions, the most active catalyst was obtained by burning with 7 M phosphoric acid (H3PO4) solution at 400°C for 45 minutes. The maximum hydrogen generation rate (HGR) obtained from the methanolysis reaction of NaBH4 at 30°C and 60°C was found as 57 200 and 76 228 mL min−1 gcat−1, respectively. The activation energy value for the catalytic methanolysis reaction was calculated as 7.89 kJ mol−1. Furthermore, Fourier transform infrared spectroscopy (FTIR), inductively coupled plasma - optical emission spectrometry (ICP-OES), X-ray diffractometer spectroscopy (XRD), Brunauer-Emmett-Teller (BET), and scanning electron microscope (SEM) analyses were performed for characterization of the synthesized catalyst. The gravimetric capacitance of the prepared electrode (catalyst material with best results) was calculated as 29 F/g at 0.25 A/g current density. The electrodes made from biomass waste are both cheap and have a good capacity.

中文翻译:

用于高效制氢和储能的无金属石榴皮催化剂和超级电容器的新型双功能碳材料

在本研究中,石榴皮 (PP) 废料被用作硼氢化钠 (NaBH 4 )甲醇分解反应的高效、经济、无金属催化剂;此外,制备的活性材料可用作超级电容器用于电力存储。考察了不同酸浓度、燃烧温度和燃烧时间等参数对石榴皮催化剂(PP-H 3 PO 4 -Cat)催化性能的影响。在最佳条件下,用 7 M 磷酸 (H 3 PO 4 ) 溶液在 400 ℃下燃烧 45 分钟可获得活性最高的催化剂。NaBH2甲醇分解反应得到的最大氢气产生率(HGR)4在 30°C 和 60°C 时发现分别为 57 200 和 76 228 mL min -1  gcat -1。催化甲醇分解反应的活化能值计算为7.89 kJ mol -1。此外,傅里叶变换红外光谱 (FTIR)、电感耦合等离子体发射光谱 (ICP-OES)、X 射线衍射仪光谱 (XRD)、Brunauer-Emmett-Teller (BET) 和扫描电子显微镜 (SEM) 分析用于表征合成的催化剂。制备的电极(具有最佳结果的催化剂材料)的重量电容在 0.25 A/g 电流密度下计算为 29 F/g。由生物质废料制成的电极既便宜又具有良好的容量。
更新日期:2021-09-20
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