TY - JOUR
T1 - High-Affinity-Assisted Nanoscale Alloys as Remarkable Bifunctional Catalyst for Alcohol Oxidation and Oxygen Reduction Reactions
AU - Tiwari, Jitendra N.
AU - Lee, Wang Geun
AU - Sultan, Siraj
AU - Yousuf, Muhammad
AU - Harzandi, Ahmad M.
AU - Vij, Varun
AU - Kim, Kwang S.
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/8/22
Y1 - 2017/8/22
N2 - A key challenge in developing fuel cells is the fabrication of low-cost electrocatalysts with high activity and long durability for the two half-reactions, i.e., the methanol/ethanol oxidation reaction (MOR/EOR) and the oxygen reduction reaction (ORR). Herein, we report a conductivity-enhanced bifunctional electrocatalyst of nanoscale-coated Pt-Pd alloys on both tin-doped indium (TDI) and reduced graphene oxide (rGO), denoted as Pt-Pd@TDI/rGO. The mass activities of Pt in the Pt-Pd@TDI/rGO hybrid toward MOR, EOR, and ORR are 2590, 1500, and 2690 mA/mg, respectively. The ORR Pt specific activity and mass activity of the electrocatalyst are 17 and 28 times larger, respectively, than commercial Pt/C catalysts. All these remarkable catalytic performances are attributed to the role of TDI in enhancing the catalytic activity by protecting Pt from oxidation as well as rapid mass/charge transfer due to the synergistic effect between surface Pt-Pd alloys and TDI/rGO.
AB - A key challenge in developing fuel cells is the fabrication of low-cost electrocatalysts with high activity and long durability for the two half-reactions, i.e., the methanol/ethanol oxidation reaction (MOR/EOR) and the oxygen reduction reaction (ORR). Herein, we report a conductivity-enhanced bifunctional electrocatalyst of nanoscale-coated Pt-Pd alloys on both tin-doped indium (TDI) and reduced graphene oxide (rGO), denoted as Pt-Pd@TDI/rGO. The mass activities of Pt in the Pt-Pd@TDI/rGO hybrid toward MOR, EOR, and ORR are 2590, 1500, and 2690 mA/mg, respectively. The ORR Pt specific activity and mass activity of the electrocatalyst are 17 and 28 times larger, respectively, than commercial Pt/C catalysts. All these remarkable catalytic performances are attributed to the role of TDI in enhancing the catalytic activity by protecting Pt from oxidation as well as rapid mass/charge transfer due to the synergistic effect between surface Pt-Pd alloys and TDI/rGO.
KW - Pt-Pd alloy
KW - bifunctional catalyst
KW - ethanol oxidation reaction
KW - graphene oxide
KW - methanol oxidation reaction
KW - oxygen reduction reaction
UR - https://www.scopus.com/pages/publications/85028516438
U2 - 10.1021/acsnano.7b01073
DO - 10.1021/acsnano.7b01073
M3 - Article
C2 - 28712290
AN - SCOPUS:85028516438
SN - 1936-0851
VL - 11
SP - 7729
EP - 7735
JO - ACS Nano
JF - ACS Nano
IS - 8
ER -