NL repository
menu
검색
Library
Browse
Communities & Collections
By Date
Authors
Titles
Subject
My Repository
My Account
Receive email updates
Edit Profile
DSpace at EWHA
자연과학대학
화학·나노과학전공
Journal papers
View : 510 Download: 0
Catalytic mechanisms of hydrogen evolution with homogeneous and heterogeneous catalysts
Title
Catalytic mechanisms of hydrogen evolution with homogeneous and heterogeneous catalysts
Authors
Fukuzumi S.
;
Yamada Y.
;
Suenobu T.
;
Ohkubo K.
;
Kotani H.
Ewha Authors
Shunichi Fukuzumi
SCOPUS Author ID
Shunichi Fukuzumi
Issue Date
2011
Journal Title
Energy and Environmental Science
ISSN
1754-5692
Citation
Energy and Environmental Science vol. 4, no. 8, pp. 2754 - 2766
Indexed
SCI; SCIE; SCOPUS
Document Type
Article
Abstract
This perspective focuses on reaction mechanisms of hydrogen (H 2) evolution with homogeneous and heterogeneous catalysts. First, photocatalytic H 2 evolution systems with homogeneous catalysts are discussed from the viewpoint of how to increase the efficiency of the two-electron process for the H 2 evolution via photoinduced electron-transfer reactions of metal complexes. Two molecules of the one-electron reduced species of [Rh III(Cp*)(bpy)(H 2O)](SO 4) (bpy = 2,2′-bipyridine) and [Ir III(Cp*)(H 2O)(bpm) Ru II(bpy) 2](SO 4) 2 (bpm = 2,2′-bipyrimidine) produced by photoinduced electron-transfer reactions are converted to the two-electron reduced complexes suitable for H 2 generation by disproportionation. The photocatalytic mechanism of H 2 evolution using Pt nanoparticles as a catalyst is also discussed based on the kinetic analysis of the electron-transfer rates from a photogenerated electron donor to Pt nanoparticles, which are comparable to the overall H 2 evolution rates. The electron-transfer rates become faster with increasing proton concentrations with an inverse kinetic isotope effect, when H + is replaced by D +. The size and shape effects of Pt nanoparticles on the rates of hydrogen evolution and the electron-transfer reaction are examined to optimize the catalytic efficiency. Finally, catalytic H 2 evolution systems from H 2 storage molecules are described including shape dependent catalytic activity of Co 3O 4 particles for ammonia borane hydrolysis and a large tunneling effect observed in decomposition of formic acid with [Ir III(Cp*)(H 2O)(bpm)Ru II(bpy) 2](SO 4) 2. © 2011 The Royal Society of Chemistry.
DOI
10.1039/c1ee01551f
Appears in Collections:
자연과학대학
>
화학·나노과학전공
>
Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML
Show full item record
Find@EWHA
트윗하기
BROWSE
Communities & Collections
By Date
Authors
Titles
Subject