Facile Synthesis of Nanoporous Pt-Y alloy with Enhanced Electrocatalytic Activity and Durability

Abstract

Recently, Pt-Y alloy has displayed an excellent electrocatalytic activity for oxygen reduction reaction (ORR), and is regarded as a promising cathode catalyst for fuel cells. However, the bulk production of nanoscaled Pt-Y alloy with outstanding catalytic performance remains a great challenge. Here, we address the challenge through a simple dealloying method to synthesize nanoporous Pt-Y alloy (NP-PtY) with a typical ligament size of ~5 nm. By combining the intrinsic superior electrocatalytic activity of Pt-Y alloy with the special nanoporous structure, the NP-PtY bimetallic catalyst presents higher activity for ORR and ethanol oxidation reaction, and better electrocatalytic stability than the commercial Pt/C catalyst and nanoporous Pt alloy. The as-made NP-PtY holds great application potential as a promising electrocatalyst in proton exchange membrane fuel cells due to the advantages of facile preparation and excellent catalytic performance.

New Aspects of Platinum Group Metal‐Based Solid‐Solution Alloy Nanoparticles: Binary to High‐Entropy Alloys

“…Cui et al. also prepared a nanoporous Pt‐Y alloy by dealloying a Pt‐Y‐Al alloy . The resultant Pt‐Y alloy showed higher activities towards ORR and EOR than commercial Pt/C and nanoporous Pt, which can be attributed to the alloying effect and the 3D nanoporous structure.…”

High‐Indexed PtNi Alloy Skin Spiraled on Pd Nanowires for Highly Efficient Oxygen Reduction Reaction Catalysis

“…Nevertheless, the practical application of Pt catalysts faces several critical challenges, including limited Pt reserves, high costs, insufficient activity/stability, and low Pt‐utilization efficiencies . Here, proven approaches to achieve higher catalytic activities include exposing the highly active crystal facets of catalyst surfaces, alloying with other suitable metals to increase intrinsic activity, and constructing hollow or core–shell structures to improve utilization.…”

Optimization of the PEMFC operating parameters for cathode in the presence of PtCo/CVD graphene using factorial design

“…To improve the fuel cell performance and reduce cost for commercialization of the technology, new catalyst and support materials are needed to reduce or replace the most widely used platinum. In order to reduce the cost associated with use of Pt and increase the oxygen reduction reaction (ORR) activity, there are many attempts to develop alloys or bimetallic structures with less Pt in the electrode …”

“…In order to reduce the cost associated with use of Pt and increase the oxygen reduction reaction (ORR) activity, there are many attempts to develop alloys or bimetallic structures with less Pt in the electrode. [4][5][6][7][8][9] Carbon black is the most widely used support material for electrocatalysts especially for PEMFCs. Because carbon corrosion is a major problem for extended operations, graphene is considered as one of the alternative to carbon black due to excellent properties such as superior conductivity, thermal stability, and high surface area.…”