eprintid: 20292
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/02/02/92
datestamp: 2024-06-04 14:20:01
lastmod: 2024-06-04 14:20:01
status_changed: 2024-06-04 14:17:10
type: article
metadata_visibility: show
creators_name: Hamid, H.H.
creators_name: Mohd Zabidi, N.A.
creators_name: Shaharun, M.S.
title: Effects of Promoters on the Physicochemical Properties of Cobalt-Iron Catalysts Supported on Multiwalled-Carbon Nanotubes
ispublished: pub
keywords: Catalyst supports; Iron; Microemulsions; Multiwalled carbon nanotubes (MWCN); Physicochemical properties; X ray photoelectron spectroscopy, Bimetallic catalysts; Effect of promoters; Multi-walled-carbon-nanotubes; Physicochemical property; Promoted catalysts; Promoter; Reverse microemulsions; Rh promoters; Synthesised; ]+ catalyst, Cobalt
note: cited By 0
abstract: Cobalt-iron bimetallic catalysts promoted with Nb, Ru or Rh and supported on multiwalled-carbon nanotubes (MWCNTs) were synthesized using a reverse-microemulsion method. The synthesized catalysts were characterized by TEM, N2-physical adsorption, XPS, XRD, and TPD/R/O methods. XPS analyses showed an increasing trend of the Co2+/Co3+ atomic ratios for the promoted catalysts, compared to that of the un-promoted Co�Fe/CNTs catalyst. The dispersion for the un-promoted Co�Fe /CNTs catalyst was 15.9 and it increased to 23.0, 20.4, and 17.7 in the presence of 0.1 wt. Nb, Ru, and Rh promoter, respectively. The addition of Nb-promoter also improved the reducibility of the catalyst as exhibited by the H2-TPR study. The presence of Nb, Ru, and Rh promoters improved the catalytic performance in a Fischer�Tropsch synthesis where the TOF over the un-promoted catalyst increased from 5.1 to 6.2, 5.7, 5.2 � 10�1 s�1 upon the addition of Nb, Ru and Rh promoter, respectively. Thus, the Nb promoter was a better promoter than Ru and Rh for the Co�Fe/CNTs catalyst. Graphical Abstract: Figure not available: see fulltext. © 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
date: 2024
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85148210860&doi=10.1007%2fs10562-023-04294-2&partnerID=40&md5=b6d12c867ffab685afeb8f646266aad0
id_number: 10.1007/s10562-023-04294-2
full_text_status: none
publication: Catalysis Letters
volume: 154
number: 1
pagerange: 245-258
refereed: TRUE
citation:   Hamid, H.H. and Mohd Zabidi, N.A. and Shaharun, M.S.  (2024) Effects of Promoters on the Physicochemical Properties of Cobalt-Iron Catalysts Supported on Multiwalled-Carbon Nanotubes.  Catalysis Letters, 154 (1).  pp. 245-258.