TY - JOUR
T1 - Electrochemical behaviors of dimethyl ether on platinum single crystal electrodes. Part I
T2 - Pt(1 1 1)
AU - Lu, Leilei
AU - Yin, Geping
AU - Tong, Yujin
AU - Zhang, Yi
AU - Gao, Yunzhi
AU - Osawa, Masatoshi
AU - Ye, Shen
N1 - Funding Information:
This research is supported by a Grant-in-Aid for Scientific Research (B) 19350099 from MEXT and PRESTO, Japan Science and Technology Agency (JST), and partially by the Natural Science Foundation of China (No. 20476020). LL acknowledges a fellowship from the Chinese government.
PY - 2008/7/15
Y1 - 2008/7/15
N2 - The electrochemical behaviors of dimethyl ether (CH3-O-CH3, DME), which is regarded as a promising fuel for the fuel cell, on platinum single crystal electrode in acidic solutions have been investigated in detail by electrochemical measurements. In 0.5 M H2SO4 solution, DME is dissociatively adsorbed on Pt(1 1 1) electrode surface in the low potential region between 0.2 and 0.5 V (vs. RHE) and further oxidized to CO2 around 0.8 V. One of the stable adsorbed intermediates for DME decomposition on Pt(1 1 1) is carbon monoxide (CO) and its coverage is approximately constant (ca. 0.37) between 0.3 and 0.5 V. The adsorption of hydrogen and anion significantly affects the DME dissociation process. The kinetic analysis on DME decomposition process shows that the apparent reaction rate of DME decomposition on Pt(1 1 1) in the initial stage reaches a maximum around 0.35 V. No direct oxidation of DME has been observed on Pt(1 1 1) electrode surface. As a model reaction system, cyanide-modified Pt(1 1 1) electrode surface shows no activity on both decomposition and oxidation of DME.
AB - The electrochemical behaviors of dimethyl ether (CH3-O-CH3, DME), which is regarded as a promising fuel for the fuel cell, on platinum single crystal electrode in acidic solutions have been investigated in detail by electrochemical measurements. In 0.5 M H2SO4 solution, DME is dissociatively adsorbed on Pt(1 1 1) electrode surface in the low potential region between 0.2 and 0.5 V (vs. RHE) and further oxidized to CO2 around 0.8 V. One of the stable adsorbed intermediates for DME decomposition on Pt(1 1 1) is carbon monoxide (CO) and its coverage is approximately constant (ca. 0.37) between 0.3 and 0.5 V. The adsorption of hydrogen and anion significantly affects the DME dissociation process. The kinetic analysis on DME decomposition process shows that the apparent reaction rate of DME decomposition on Pt(1 1 1) in the initial stage reaches a maximum around 0.35 V. No direct oxidation of DME has been observed on Pt(1 1 1) electrode surface. As a model reaction system, cyanide-modified Pt(1 1 1) electrode surface shows no activity on both decomposition and oxidation of DME.
KW - Dimethyl ether (DME)
KW - Electro-oxidation
KW - Electrocatalysis
KW - Fuel cell
KW - Platinum single crystal
UR - http://www.scopus.com/inward/record.url?scp=46549083258&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=46549083258&partnerID=8YFLogxK
U2 - 10.1016/j.jelechem.2008.04.013
DO - 10.1016/j.jelechem.2008.04.013
M3 - Article
AN - SCOPUS:46549083258
SN - 1572-6657
VL - 619-620
SP - 143
EP - 151
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 1-2
ER -