TY - JOUR
T1 - One Model, Two Enzymes
T2 - Activation of Hydrogen and Carbon Monoxide
AU - Ogo, Seiji
AU - Mori, Yuki
AU - Ando, Tatsuya
AU - Matsumoto, Takahiro
AU - Yatabe, Takeshi
AU - Yoon, Ki Seok
AU - Hayashi, Hideki
AU - Asano, Masashi
N1 - Funding Information:
This work was supported by Grants-in-Aid: 26000008 (Specially Promoted Research), 16K05727, and 15K05566 from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan and the World Premier International Research Center Initiative (WPI), Japan.
Publisher Copyright:
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2017/8/7
Y1 - 2017/8/7
N2 - The ability to catalyze the oxidation of both H2 and CO in one reaction pot would be a major boon to hydrogen technology since CO is a consistent contaminant of H2 supplies. Here, we report just such a catalyst, with the ability to catalyze the oxidation of either or both H2 and CO, based on the pH value. This catalyst is based on a NiIr core that mimics the chemical function of [NiFe]hydrogenase in acidic media (pH 4–7) and carbon monoxide dehydrogenase in basic media (pH 7–10). We have applied this catalyst in a demonstration fuel cell using H2, CO, and H2/CO (1/1) feeds as fuels for oxidation at the anode. The power density of the fuel cell depends on the pH value in the media of the fuel cell and shows a similar pH dependence in a flask. We have isolated and characterized all intermediates in our proposed catalytic cycles.
AB - The ability to catalyze the oxidation of both H2 and CO in one reaction pot would be a major boon to hydrogen technology since CO is a consistent contaminant of H2 supplies. Here, we report just such a catalyst, with the ability to catalyze the oxidation of either or both H2 and CO, based on the pH value. This catalyst is based on a NiIr core that mimics the chemical function of [NiFe]hydrogenase in acidic media (pH 4–7) and carbon monoxide dehydrogenase in basic media (pH 7–10). We have applied this catalyst in a demonstration fuel cell using H2, CO, and H2/CO (1/1) feeds as fuels for oxidation at the anode. The power density of the fuel cell depends on the pH value in the media of the fuel cell and shows a similar pH dependence in a flask. We have isolated and characterized all intermediates in our proposed catalytic cycles.
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U2 - 10.1002/anie.201704864
DO - 10.1002/anie.201704864
M3 - Article
C2 - 28585418
AN - SCOPUS:85021290506
VL - 56
SP - 9723
EP - 9726
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 33
ER -