Naman Srivastava , Madhu Agarwal , Neha Pal , Rajeev Kumar Dohare
{"title":"利用废茶叶作为无金属催化剂,通过乙醇分解硼氢化钠制氢","authors":"Naman Srivastava , Madhu Agarwal , Neha Pal , Rajeev Kumar Dohare","doi":"10.1016/j.biombioe.2024.107168","DOIUrl":null,"url":null,"abstract":"<div><p>In the present study, waste green and black tea leaves have been used to synthesize metal–free catalysts for hydrogen generation by ethanolysis of sodium borohydride by the acetic acid activation and carbonization. The FTIR, BET, SEM-EDS, and XPS characterizations have been performed to analyze the synthesized catalysts' properties. The parameters such as amounts of catalysts, SB, and reaction temperature were studied while performing the experiments. They were optimized using the Response Surface Methodology (RSM) to obtain the highest values of Hydrogen Generation Rates (HGR) of 1350 ml min<sup>−1</sup> g catalyst<sup>−1</sup> and 2700 ml min<sup>−1</sup> g catalyst<sup>−1</sup> using the acetic acid activated black tea (AA – BT) and acetic acid activated green tea (AA – GT) catalysts respectively with the activation energies of 13.14 kJ mol<sup>−1</sup> and 37 kJ mol<sup>−1</sup>. The BET analysis has revealed that the AA – GT and AA – BT catalysts have surface areas of 22.96 m<sup>2</sup> g<sup>−1</sup> and 3.28 m<sup>2</sup> g<sup>−1</sup>, pore diameters of 1.72 nm and 1.70 nm and pore volumes of 0.0047 and 0.0331785 m<sup>3</sup> g<sup>−1</sup> respectively. The electrochemical analysis has revealed that the synthesized metal–free catalysts AA – BT and AA - GT possess good specific capacitances of 63.77 mF cm<sup>−2</sup> and 121 mF cm<sup>−2</sup>, which shows that both can be used as electrode material for energy storage applications. Hence, it can be believed that both metal–free catalysts can act as dual functional materials, which can act as catalysts and energy storage materials.</p></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":null,"pages":null},"PeriodicalIF":5.8000,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Utilization of waste tea leaves as metal-free catalyst for hydrogen generation via ethanolysis of Sodium Borohydride\",\"authors\":\"Naman Srivastava , Madhu Agarwal , Neha Pal , Rajeev Kumar Dohare\",\"doi\":\"10.1016/j.biombioe.2024.107168\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In the present study, waste green and black tea leaves have been used to synthesize metal–free catalysts for hydrogen generation by ethanolysis of sodium borohydride by the acetic acid activation and carbonization. The FTIR, BET, SEM-EDS, and XPS characterizations have been performed to analyze the synthesized catalysts' properties. The parameters such as amounts of catalysts, SB, and reaction temperature were studied while performing the experiments. They were optimized using the Response Surface Methodology (RSM) to obtain the highest values of Hydrogen Generation Rates (HGR) of 1350 ml min<sup>−1</sup> g catalyst<sup>−1</sup> and 2700 ml min<sup>−1</sup> g catalyst<sup>−1</sup> using the acetic acid activated black tea (AA – BT) and acetic acid activated green tea (AA – GT) catalysts respectively with the activation energies of 13.14 kJ mol<sup>−1</sup> and 37 kJ mol<sup>−1</sup>. The BET analysis has revealed that the AA – GT and AA – BT catalysts have surface areas of 22.96 m<sup>2</sup> g<sup>−1</sup> and 3.28 m<sup>2</sup> g<sup>−1</sup>, pore diameters of 1.72 nm and 1.70 nm and pore volumes of 0.0047 and 0.0331785 m<sup>3</sup> g<sup>−1</sup> respectively. The electrochemical analysis has revealed that the synthesized metal–free catalysts AA – BT and AA - GT possess good specific capacitances of 63.77 mF cm<sup>−2</sup> and 121 mF cm<sup>−2</sup>, which shows that both can be used as electrode material for energy storage applications. Hence, it can be believed that both metal–free catalysts can act as dual functional materials, which can act as catalysts and energy storage materials.</p></div>\",\"PeriodicalId\":253,\"journal\":{\"name\":\"Biomass & Bioenergy\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.8000,\"publicationDate\":\"2024-03-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Biomass & Bioenergy\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0961953424001211\",\"RegionNum\":2,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"AGRICULTURAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biomass & Bioenergy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0961953424001211","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRICULTURAL ENGINEERING","Score":null,"Total":0}
Utilization of waste tea leaves as metal-free catalyst for hydrogen generation via ethanolysis of Sodium Borohydride
In the present study, waste green and black tea leaves have been used to synthesize metal–free catalysts for hydrogen generation by ethanolysis of sodium borohydride by the acetic acid activation and carbonization. The FTIR, BET, SEM-EDS, and XPS characterizations have been performed to analyze the synthesized catalysts' properties. The parameters such as amounts of catalysts, SB, and reaction temperature were studied while performing the experiments. They were optimized using the Response Surface Methodology (RSM) to obtain the highest values of Hydrogen Generation Rates (HGR) of 1350 ml min−1 g catalyst−1 and 2700 ml min−1 g catalyst−1 using the acetic acid activated black tea (AA – BT) and acetic acid activated green tea (AA – GT) catalysts respectively with the activation energies of 13.14 kJ mol−1 and 37 kJ mol−1. The BET analysis has revealed that the AA – GT and AA – BT catalysts have surface areas of 22.96 m2 g−1 and 3.28 m2 g−1, pore diameters of 1.72 nm and 1.70 nm and pore volumes of 0.0047 and 0.0331785 m3 g−1 respectively. The electrochemical analysis has revealed that the synthesized metal–free catalysts AA – BT and AA - GT possess good specific capacitances of 63.77 mF cm−2 and 121 mF cm−2, which shows that both can be used as electrode material for energy storage applications. Hence, it can be believed that both metal–free catalysts can act as dual functional materials, which can act as catalysts and energy storage materials.
期刊介绍:
Biomass & Bioenergy is an international journal publishing original research papers and short communications, review articles and case studies on biological resources, chemical and biological processes, and biomass products for new renewable sources of energy and materials.
The scope of the journal extends to the environmental, management and economic aspects of biomass and bioenergy.
Key areas covered by the journal:
• Biomass: sources, energy crop production processes, genetic improvements, composition. Please note that research on these biomass subjects must be linked directly to bioenergy generation.
• Biological Residues: residues/rests from agricultural production, forestry and plantations (palm, sugar etc), processing industries, and municipal sources (MSW). Papers on the use of biomass residues through innovative processes/technological novelty and/or consideration of feedstock/system sustainability (or unsustainability) are welcomed. However waste treatment processes and pollution control or mitigation which are only tangentially related to bioenergy are not in the scope of the journal, as they are more suited to publications in the environmental arena. Papers that describe conventional waste streams (ie well described in existing literature) that do not empirically address ''new'' added value from the process are not suitable for submission to the journal.
• Bioenergy Processes: fermentations, thermochemical conversions, liquid and gaseous fuels, and petrochemical substitutes
• Bioenergy Utilization: direct combustion, gasification, electricity production, chemical processes, and by-product remediation
• Biomass and the Environment: carbon cycle, the net energy efficiency of bioenergy systems, assessment of sustainability, and biodiversity issues.