Trifunctional Intermetallic PtZn‐Based Electrocatalyst for Integrated Hybrid Acid/Alkali Electrochemical Cell toward Glycerol Conversion and H2 Generation

• Published in: Advanced functional materials 2024-11, Vol.34 (46), p.n/a
• Main Authors: Wang, Peng, Chen, Kai, Chen, Junxiang, Wang, Genxiang, Pan, Weifan, Wen, Zhenhai
• Format: Article
• Language: English
• Subjects: Chemical reduction; direct glycerol fuel cell; Effectiveness; Electrocatalysts; Electrochemical cells; Electrolytic cells; Fuel cells; Glycerol; glycerol valorization; H2 generation; Hydrogen evolution reactions; Hydrogen production; intermetallic compound; Oxidation; Oxygen reduction reactions; trifunctional electrocatalyst
• ISSN: 1616-301X; 1616-3028
• DOI: 10.1002/adfm.202408267

The advancement of renewable energy is intricately relied on the development of diverse sustainable electrochemical devices. Persuing exceptionally efficient multifunctional electrocatalysts is imperative, as it promises to significantly streamline the electrode fabrication process, thereby enhancing the overall effectiveness of these devices. Herein, a trifunctional electrocatalysts of N‐doped carbon (NC) supported intermetallic PtZn catalyst (PtZn‐IMC@NC) are reported, which performs highly attractively toward the electrocatalysis of glycerol oxidation reactions (GOR), oxygen reduction reactions (ORR), and hydrogen evolution reactions (HER). Its effectiveness are demonstrated as electrocatalysts for both the anode and cathode in a hybrid acid/alkali direct glycerol fuel cell (AA‐DGFC) and a hybrid acid/alkali glycerol‐hydrogen electrolyzer (AA‐GHEC). The AA‐DGFC can release an impressive peak power density of 286.8 mW cm−2, while the AA‐GHEC achieves a noteworthy current density of 100 mA cm−2 at a significantly low applied voltage of 0.47 V. Such intermetallic PtZn‐based trifunctional electrocatalyst empowers them to establish a self‐powered integrated electrochemical device with the AA‐DGFC driving the AA‐GHEC. This setup exemplifies efficient valorization of glycerol into formate in both cells and hydrogen production in electrolyzer device. This study sparks innovation across diverse applications of multifunctional electrocatalysts and infuses renewed momentum into the realm of advanced energy devices. A pioneering integrated configuration for autonomous co‐production of formate and H2 is set up by applying and pairing PtZn‐IMC@NC in Acid/alkali direct glycerol fuel cell (AA‐DGFC) and Acid/alkali glycerol‐hydrogen electrolytic cell (AA‐GHEC).