High-Affinity-Assisted Nanoscale Alloys as Remarkable Bifunctional Catalyst for Alcohol Oxidation and Oxygen Reduction Reactions | Zendy

Jitendra N. Tiwari | Zendy; WangGeun Lee | Zendy; Siraj Sultan | Zendy; Muhammad Yousuf | Zendy; Ahmad M. Harzandi | Zendy; Varun Vij | Zendy; Kwang S. Kim | Zendy

Open Access

High-Affinity-Assisted Nanoscale Alloys as Remarkable Bifunctional Catalyst for Alcohol Oxidation and Oxygen Reduction Reactions

Author(s) -

Jitendra N. Tiwari,

WangGeun Lee,

Siraj Sultan,

Muhammad Yousuf,

Ahmad M. Harzandi,

Varun Vij,

Kwang S. Kim

Publication year - 2017

Publication title -

acs nano

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.554

H-Index - 382

eISSN - 1936-086X

pISSN - 1936-0851

DOI - 10.1021/acsnano.7b01073

Subject(s) - bifunctional , electrocatalyst , catalysis , methanol , graphene , oxide , materials science , chemical engineering , chemistry , inorganic chemistry , nanotechnology , electrochemistry , organic chemistry , electrode , metallurgy , engineering

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.

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