Modulating Single-Atom Pt Coordination for Enhanced Low-Temperature Ammonia Fuel Cell Electrocatalysis.

ABSTRACT: Low-temperature direct ammonia fuel cells (DAFCs) can be used for the on-demand generation of clean electricity. However, such systems have low efficiency due to the kinetically sluggish ammonia oxidation reaction (AOR) and oxygen reduction reaction (ORR). Prior reports have largely focused on Pt-based electrocatalysts, however, their high cost motivates the need for simultaneously increasing activity whilst reducing the metal loading. Here, the design of a bifunctional Pt single-atom catalyst (SAC) is reported, with enhanced catalytic activities compared to commercial Pt/C for both reactions. Notably, by modulating the Pt SAC coordination, the optimal catalyst (Pt-DG-1) displayed a high AOR mass activity of 1.23 A mg_Pt ^-1 and ORR mass activity of 7.98 A mg_Pt

SUBMITTER: Wu T 

PROVIDER: S-EPMC12531743 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature