Shruti Aich, A. Banerjee, M. Pai, B. Dutta, P. A. Hassan, H. Poswal, A. Tripathi
{"title":"柠檬酸衍生纳米多孔碳化钼电催化剂:孔隙率对HER性能的影响","authors":"Shruti Aich, A. Banerjee, M. Pai, B. Dutta, P. A. Hassan, H. Poswal, A. Tripathi","doi":"10.1557/s43578-023-01104-8","DOIUrl":null,"url":null,"abstract":"The development of noble metal-free electrocatalyst for HER is crucial for sustainable green electrolytic hydrogen production. Molybdenum carbides have shown enormous potential as an economic electrocatalyst for HER. In this study, we have synthesized three Mo2C/C electrocatalysts by varying the ratios of carbon (citric acid) and molybdenum (ammonium heptamolybdate) precursors as 2:1, 1:1, and 1:2 (samples abbreviated as CAMO21, CAMO11, and CAMO12) using the carburization method. The synthesized samples are characterized by powder XRD, Raman spectroscopy, SAXS, SEM, and TEM which revealed the crystal phase, porosity, and morphological properties of the samples. The polarization curves reveal that their electrochemical activity for HER varied as CAMO12 > CAMO11 > CAMO21. EIS studies indicated that the resistance due to porosity of the samples is maximum for CAMO11, indicating that a bimodal porosity with a substantial fraction of pores near the micropore region is not beneficial for electrochemical HER.","PeriodicalId":14079,"journal":{"name":"International Journal of Materials Research","volume":"34 1","pages":"3861 - 3873"},"PeriodicalIF":0.7000,"publicationDate":"2023-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Citric acid-derived nanoporous molybdenum carbide electrocatalyst for HER: Effect of porosity on HER performance\",\"authors\":\"Shruti Aich, A. Banerjee, M. Pai, B. Dutta, P. A. Hassan, H. Poswal, A. Tripathi\",\"doi\":\"10.1557/s43578-023-01104-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The development of noble metal-free electrocatalyst for HER is crucial for sustainable green electrolytic hydrogen production. Molybdenum carbides have shown enormous potential as an economic electrocatalyst for HER. In this study, we have synthesized three Mo2C/C electrocatalysts by varying the ratios of carbon (citric acid) and molybdenum (ammonium heptamolybdate) precursors as 2:1, 1:1, and 1:2 (samples abbreviated as CAMO21, CAMO11, and CAMO12) using the carburization method. The synthesized samples are characterized by powder XRD, Raman spectroscopy, SAXS, SEM, and TEM which revealed the crystal phase, porosity, and morphological properties of the samples. The polarization curves reveal that their electrochemical activity for HER varied as CAMO12 > CAMO11 > CAMO21. EIS studies indicated that the resistance due to porosity of the samples is maximum for CAMO11, indicating that a bimodal porosity with a substantial fraction of pores near the micropore region is not beneficial for electrochemical HER.\",\"PeriodicalId\":14079,\"journal\":{\"name\":\"International Journal of Materials Research\",\"volume\":\"34 1\",\"pages\":\"3861 - 3873\"},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2023-08-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Materials Research\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1557/s43578-023-01104-8\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Materials Research","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1557/s43578-023-01104-8","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
Citric acid-derived nanoporous molybdenum carbide electrocatalyst for HER: Effect of porosity on HER performance
The development of noble metal-free electrocatalyst for HER is crucial for sustainable green electrolytic hydrogen production. Molybdenum carbides have shown enormous potential as an economic electrocatalyst for HER. In this study, we have synthesized three Mo2C/C electrocatalysts by varying the ratios of carbon (citric acid) and molybdenum (ammonium heptamolybdate) precursors as 2:1, 1:1, and 1:2 (samples abbreviated as CAMO21, CAMO11, and CAMO12) using the carburization method. The synthesized samples are characterized by powder XRD, Raman spectroscopy, SAXS, SEM, and TEM which revealed the crystal phase, porosity, and morphological properties of the samples. The polarization curves reveal that their electrochemical activity for HER varied as CAMO12 > CAMO11 > CAMO21. EIS studies indicated that the resistance due to porosity of the samples is maximum for CAMO11, indicating that a bimodal porosity with a substantial fraction of pores near the micropore region is not beneficial for electrochemical HER.
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The International Journal of Materials Research (IJMR) publishes original high quality experimental and theoretical papers and reviews on basic and applied research in the field of materials science and engineering, with focus on synthesis, processing, constitution, and properties of all classes of materials. Particular emphasis is placed on microstructural design, phase relations, computational thermodynamics, and kinetics at the nano to macro scale. Contributions may also focus on progress in advanced characterization techniques. All articles are subject to thorough, independent peer review.
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