Integrating nanostructured Pt-based electrocatalysts in proton exchange membrane fuel cells

Imaging Heterogeneous Electrocatalyst Stability and Decoupling Degradation Mechanisms in Operating Hydrogen Fuel Cells

“…The performance and cost are both driven by the design of a multilayered nanocomposite membrane electrode assembly (MEA) . Despite great progress in optimizing individual components of the PEM fuel cell (PEMFC) MEAs in laboratory model systems, , these advances have not always translated into improved performance at the device level, − because strong interactions between different components and the complex chemical environment of an operating cell hinders the integration of each component into an optimized MEA architecture. , These effects apply not only to catalyst activity, where poisoning of the Pt surface by the ionomer is increasingly recognized as a limiting factor, but also to water/thermal transport, electrolyte stability, and myriad other issues related to integrated systems engineering . Improving the durability of high-performance catalysts presents a great challenge and is limited by our understanding of the degradation phenomena. , Carefully balancing the performance, durability, and cost of the oxygen reduction reaction (ORR) catalyst is necessary for technological advancement of PEMFC systems …”

A Facile Way for Acquisition of a Nanoporous Pt–C Catalyst for Oxygen Reduction Reaction

“…It is noteworthy that in the single‐cell experiment, ADT consisted of 4000 cycles because of a different electrochemical process compared to the half‐cell measurements. [ 67,68 ]…”

Enhanced oxygen reduction reaction activity and durability of Pt nanoparticles deposited on graphene-coated alumina nanofibres

“…The ideal catalyst support for practical PEMFC application should present a micropore-free structure, with non-porous NPs dispersed on its surface. 3,36 The main advantage of such a morphology is connected with the fact that ionomers cannot enter nanopores that are smaller than the Naon® aggregates (e.g. less than 10 nm).…”

“…The oxygen reduction reaction (ORR) at the proton exchange membrane fuel cell (PEMFC) cathode is one of the few most important electrochemical reactions for eco-friendly renewable energy conversion. [1][2][3] Pt-based electrocatalysts were extensively investigated for the ORR in the past few decades due to their considerably high electrocatalytic activity. 4,5 However, the sluggish kinetics of the ORR and degradation of the supported Pt nanoparticles (NPs) under fuel cell operating conditions obstruct the large-scale commercialisation of PEMFC technology.…”