Multiphase lattice engineering of bimetallic phosphide-embedded tungsten-based phosphide/oxide nanorods on carbon cloth: A synergistic and stable electrocatalyst for overall water splitting

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 499; p. 155832
• Main Authors: Acharya, Debendra, Chhetri, Kisan, Pathak, Ishwor, Muthurasu, Alagan, Mangal Bhattarai, Roshan, Kim, Taewoo, Raj Rosyara, Yagya, Woo Lee, Dae, Hoon Ko, Tae, Yong Kim, Hak
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.11.2024
• Subjects: Bimetallic phosphide; Carbon cloth (CC); In-situ phosphorization; Multiphase lattice; Overall water splitting; Carbon cloth (CC); Multiphase lattice; Overall water splitting; In-situ phosphorization; Bimetallic phosphide
• ISSN: 1385-8947
• DOI: 10.1016/j.cej.2024.155832

[Display omitted] •Unique (Fe,CO)-P/W-(O,P)@CC is developed for overall water splitting via an in-situ phosphorization process.•WO3@CC is designed for creating the final (Fe,Co)-P-integrated W-(O,P)@CC structure.•The multi-phase design increases the active sites, and fast electron transport, enhancing catalytic activity.•The catalytic activity of (Fe,CO)-P/W-(O,P)@CC-1 exhibits overpotential of 61.3 mV for HER and 210 mV for OER @ 10 mA cm−2. The hierarchical design of the three-dimensional (3D) nanoarchitecture, comprising multiple phases within an interconnected network on a conductive substrate, offers a high specific surface area, abundant exposed active sites, and rapid electron transport. In our study, we synthesized a hybrid catalyst by integrating (Fe,CO)-P nanoparticles into uniformly grown W-(O,P) nanorods on carbon cloth (CC) using a straightforward method, demonstrating notable electrocatalytic performance. The as-synthesized (Fe,CO)-P/W-(O,P)@CC exhibited remarkable performance in both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) for overall water splitting. It achieves overpotentials of 210 and 61.3 mV for the OER and HER, respectively, at a current density of 10 mA cm−2 in a 1 M KOH solution. As a bifunctional electrocatalyst in overall water splitting, (Fe,CO)-P/W-(O,P)@CC needs only 1.50 V to attain a current density of 10 mA cm−2, surpassing traditional Pt/C@CC and IrO2@CC counterparts (1.53 V @ 10 mA cm−2). The synergistic effects between (Fe,Co)-P and the W-(O,P)@CC nanohybrid heterostructure enhance the charge transfer, further promoting the activity of this hybrid electrocatalyst. This study reveals a promising avenue for advanced water electrolysis applications.