Open AccessL-Phenylalanine-Templated Platinum Catalyst with Enhanced Performance for Oxygen Reduction Reaction
Author(s) -
Jiajun Wang,
Shyam Kattel,
Zongyuan Wang,
Jingguang G. Chen,
Changjun Liu
Publication year - 2018
Publication title -
acs applied materials and interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.535
H-Index - 228
eISSN - 1944-8252
pISSN - 1944-8244
DOI - 10.1021/acsami.8b04578
Subject(s) - materials science , catalysis , nanomaterials , platinum , dopant , proton exchange membrane fuel cell , chemical engineering , nanoparticle , platinum nanoparticles , density functional theory , oxygen reduction reaction , nanotechnology , inorganic chemistry , doping , chemistry , electrode , electrochemistry , organic chemistry , computational chemistry , optoelectronics , engineering
Pt-based materials are the most efficient catalysts for the oxygen reduction reaction (ORR) in proton-exchange membrane fuel cells. However, fabrication of active and stable Pt catalysts still remains challenging. In this work, Pt-l-phenylalanine (Pt-LPHE) films, with highly dispersed Pt nanoparticles (NPs) featuring predominately (111) facets, have been prepared via a room-temperature electron reduction method. Loading Pt-LPHE onto carbon support produces a novel nanomaterial (Pt-AL/C), resulting in a simultaneous loading of highly dispersed Pt NPs and N doping. Density functional theory calculations demonstrate that the N dopants stabilize the Pt NPs and reduce the *O/*OH binding energies on the Pt NPs. As a result, the Pt-AL/C nanomaterial shows significantly enhanced ORR activity and stability over commercial Pt/C after 10 000 cycle stability tests. This work provides a novel eco-friendly and energy-neutral approach for preparing metal NPs with controllable structures and sizes.
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