Progress of supported Pt-based catalysts for electrochemical methanol energy conversion

Abstract

Electrochemical methanol energy conversion based on direct methanol fuel cells (DMFCs) and methanol-assisted water splitting (MAWS) for hydrogen generation has received increasing attention. However, the slow kinetics of the methanol oxidation reaction (MOR), a key challenge that limits their efficiency and performance, remains a major obstacle to large-scale commercial applications. Supported platinum (Pt)-based electrocatalysts have shown significant potential to enhance MOR performance by leveraging coordination synergistic effects between the catalyst and support materials. This review provides an in-depth overview of the recent progress in developing supported Pt-based electrocatalysts for methanol energy conversion systems. We first outline the established mechanism of methanol oxidation and highlight recent advancements in situ techniques that provide deeper insights into the MOR process. Then, the emphasis on support impact on catalytic activity and mechanism, various modification strategies and preparation methods for developing supported Pt-based catalysts were highlighted. The practical applications of Pt-based catalysts in DMFCs and MAWS were presented, with a particular focus on different support types, including carbon-based, non‑carbon-based, and hybrid materials. The review also provides a comprehensive understanding of the catalytic challenges and opportunities, offering valuable insights and guidance for the future development of supported Pt-based electrocatalysts in methanol-relevant energy conversion systems.