Janus structural TaON/Graphene-like carbon dual-supported Pt electrocatalyst enables efficient oxygen reduction reaction

• Published in: Journal of colloid and interface science 2025-01, Vol.677 (Pt A), p.677-686
• Main Authors: Li, Zhongliang, Cao, Lili, Yang, Ting, He, Jinwei, Wang, Zelin, He, Jinlu, Zhao, Yan, Chai, Zhanli
• Format: Article
• Language: English
• Subjects: adsorption; carbon; catalysts; corrosion; density functional theory; durability; Electrocatalyst; electrochemistry; Janus structure; Oxygen reduction reaction; platinum; Synergy; TaON
• ISSN: 0021-9797; 1095-7103; 1095-7103
• DOI: 10.1016/j.jcis.2024.07.167

The Pt/TaON/GLC prepared by in-situ molecular self-assembly strategy exhibits higher ORR activity and durability, since Janus structural TaON/GLC dual-carrier presents a maximum synergy for the improvement in conductivity, O2 adsorption and OO cleavage. [Display omitted] •Janus TaON/GLC dual-carrier is prepared via an in-situ self-assembly strategy.•The Janus structure provides strong metal-carrier and carrier-carrier interactions.•Pt/TaON/GLC exhibits higher ORR activity and durability compared to Pt/C.•TaON and GLC present the maximum synergies during ORR process. Developing carbon-supported Pt-based electrocatalysts with high activity and long-durability for the oxygen reduction reaction (ORR) is an enormous challenge for their commercial applications due to the corrosion of carbon supports in acid/alkaline solution at high potential. In this work, a Janus structural TaON/graphene-like carbon (GLC) was synthesized via an in-situ molecular selfassembly strategy, which was used as a dual-carrier for platinum (Pt). The as-obtained Pt/TaON/GLC presents high half-wave potential (0.94 V vs. RHE), excellent mass (1.48 A mgPt-1) and specific (1.75 mA cmPt-2) activities at 0.9 V, and superior long-term durability with a minimal loss (8.0 %) of mass activity after 10,000 cycles in alkaline solution, outperforming those of Pt/C and other catalysts. The structural characterizations and density functional theory (DFT) calculations indicate that the Pt/TaON/GLC catalyst exhibits the maximum synergies, including enhanced interfacial electron density, improved charge transfer, enhanced O2 adsorption, andsuperimposed OO cleavage. This work shows a potential strategy for preparing the high-active and long-durable Pt-based electrocatalyst by synergism-promoted interface engineering.