Item request has been placed! ×
Item request cannot be made. ×
loading  Processing Request

Strong activation effect on a ru-co-c thin film catalyst for the hydrolysis of sodium borohydride.

Item request has been placed! ×
Item request cannot be made. ×
loading   Processing Request
اقرأ على الانترنت اقرأ أكثر حفظ في قائمتي
  • معلومة اضافية
    • المصدر:
      Publisher: Nature Publishing Group Country of Publication: England NLM ID: 101563288 Publication Model: Electronic Cited Medium: Internet ISSN: 2045-2322 (Electronic) Linking ISSN: 20452322 NLM ISO Abbreviation: Sci Rep Subsets: PubMed not MEDLINE
    • بيانات النشر:
      Original Publication: London : Nature Publishing Group, copyright 2011-
    • نبذة مختصرة :
      In this work, we prepared a series of Ni foam supported Ru-Co, Ru-Co-B and Ru-Co-C catalysts in the form of columnar thin films by magnetron sputtering for the hydrolysis of sodium borohydride. We studied the activity and durability upon cycling. We found a strong activation effect for the Ru-Co-C sample which was the highest ever reported. This catalyst reached in the second cycle an activity 5 times higher than the initial (maximum activity 9310 ml.min -1 .g CoRu -1 at 25 °C). Catalytic studies and characterization of the fresh and used samples permitted to attribute the strong activation effect to the following factors: (i) small column width and amorphous character (ii) the presence of Ru and (iii) dry state before each cycle. The presence of boron in the initial composition is detrimental to the durability. Our studies point out to the idea that after the first cycle the activity is controlled by surface Ru, which is the most active of the two metals. Apart from the activation effect, we found that catalysts deactivated in further cycles. We ascribed this effect to the loss of cobalt in the form of hydroxides, showing that deactivation was controlled by the chemistry of Co, the major surface metal component of the alloy. Alloying with Ru is beneficial for the activity but not for the durability, and this should be improved.
    • Comments:
      Erratum in: Sci Rep. 2018 Sep 4;8(1):13465. doi: 10.1038/s41598-018-31701-1. (PMID: 30181588)
    • References:
      Nature. 2001 Nov 15;414(6861):353-8. (PMID: 11713542)
      J Phys Chem B. 2006 Aug 31;110(34):17024-33. (PMID: 16927996)
      Phys Chem Chem Phys. 2014 Apr 21;16(15):6872-85. (PMID: 24615471)
    • الموضوع:
      Date Created: 20180629 Latest Revision: 20191120
    • الموضوع:
      20250114
    • الرقم المعرف:
      PMC6021453
    • الرقم المعرف:
      10.1038/s41598-018-28032-6
    • الرقم المعرف:
      29950653