TY - JOUR
T1 - Carbide-Supported PtRu Catalysts for Hydrogen Oxidation Reaction in Alkaline Electrolyte
AU - Hamo, Eliran R.
AU - Singh, Ramesh K.
AU - Douglin, John C.
AU - Chen, Sian
AU - Hassine, Mohamed Ben
AU - Carbo-Argibay, Enrique
AU - Lu, Shanfu
AU - Wang, Haining
AU - Ferreira, Paulo J.
AU - Rosen, Brian A.
AU - Dekel, Dario R.
N1 - Publisher Copyright:
© 2020 American Chemical Society.
PY - 2021/1/15
Y1 - 2021/1/15
N2 - Owing to the sluggish kinetics of the hydrogen oxidation reaction (HOR) in alkaline electrolyte, it is considered a limiting reaction for the development of anion-exchange membrane fuel cell (AEMFC) technology. Studies of alkaline HOR catalysis mainly focus on carbon-supported nanoparticles, which have weak metal-support interactions. In this contribution, we present a unique support based on transition metal carbides (TMCs = Mo2C, Mo2C-TaC, and Mo2C-W2C) for the HOR. PtRu nanoparticles are deposited onto the TMC supports and are characterized by a variety of analytical techniques. The major findings are (i) experimental and theoretical evidence for strong-metal support interaction by both X-ray absorption near-edge structure and density functional theory, (ii) the kinetic current density (jk,s) @25 mV of PtRu/Mo2C-TaC catalyst are 1.65 and 1.50 times higher than that of PtRu/Mo2C and PtRu/Mo2C-W2C, respectively, and (iii) enhanced "tethering"of PtRu nanoparticles on TMC supports. Furthermore, the AEMFC based on the PtRu/Mo2C-TaC anode exhibited a peak power density of 1.2 W cm-2 @70 °C, opening the doors for the development of advanced catalysts based on engineering support materials.
AB - Owing to the sluggish kinetics of the hydrogen oxidation reaction (HOR) in alkaline electrolyte, it is considered a limiting reaction for the development of anion-exchange membrane fuel cell (AEMFC) technology. Studies of alkaline HOR catalysis mainly focus on carbon-supported nanoparticles, which have weak metal-support interactions. In this contribution, we present a unique support based on transition metal carbides (TMCs = Mo2C, Mo2C-TaC, and Mo2C-W2C) for the HOR. PtRu nanoparticles are deposited onto the TMC supports and are characterized by a variety of analytical techniques. The major findings are (i) experimental and theoretical evidence for strong-metal support interaction by both X-ray absorption near-edge structure and density functional theory, (ii) the kinetic current density (jk,s) @25 mV of PtRu/Mo2C-TaC catalyst are 1.65 and 1.50 times higher than that of PtRu/Mo2C and PtRu/Mo2C-W2C, respectively, and (iii) enhanced "tethering"of PtRu nanoparticles on TMC supports. Furthermore, the AEMFC based on the PtRu/Mo2C-TaC anode exhibited a peak power density of 1.2 W cm-2 @70 °C, opening the doors for the development of advanced catalysts based on engineering support materials.
KW - DFT
KW - alkaline electrolyte
KW - anion-exchange membrane fuel cell
KW - carbide supports
KW - hydrogen oxidation reaction
UR - http://www.scopus.com/inward/record.url?scp=85099649196&partnerID=8YFLogxK
U2 - 10.1021/acscatal.0c03973
DO - 10.1021/acscatal.0c03973
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AN - SCOPUS:85099649196
SN - 2155-5435
VL - 11
SP - 932
EP - 947
JO - ACS Catalysis
JF - ACS Catalysis
IS - 2
ER -
