Hydrothermal Synthesis of a Novel 2D‐Layered Vanadium Pyrophosphate With Multi‐Channel and Outstanding Proton Transport Properties
Year: 2025
Type: article
Abstract: ABSTRACT A novel vanadium pyrophosphate, (C6H14N2)[(VO)P2O7] (denoted as 1), has been successfully synthesized via a one‐step hydrothermal method at 180°C. The compound exhibits a unique two‐dimensional (2D) layered architecture formed by the interconnection of helical one‐dimensional (1D) [(VO)P2O7]2− anionic chains and protonated C6H14N22+ cations. Structural analysis reveals that the 1D chains are constructed through corner sharing of VO5 square pyramids and P2O7 pyrophosphate units. The protonated cations further assemble with these chains via hydrogen‐bonding interactions, generating a 2D framework with distinct rhombic, flower‐like, and rectangular channels along the crystallographic c‐, b‐, and a‐axes, respectively. Notably, the hydrogen‐bonded network within this framework facilitates efficient proton conduction, achieving a conductivity of 3.3 × 10−4 S cm−1 at 50°C and 100% relative humidity (RH). Electrochemical studies demonstrate that the compound 1/Nafion composite exhibits significantly enhanced redox peak intensities in cyclic voltammetry (CV) compared to pristine Nafion membranes, clearly verifying its efficacy as a proton conductive medium. Furthermore, the proton transport mechanism was identified as a vehicle‐type process, supported by an activation energy of 1.66 eV derived from Arrhenius analysis.
Source: Applied Organometallic Chemistry
DOI: 10.1002/aoc.70358
Authors: Le Zhang, Chenyang Zhang, Yawen Li, Shaohong Xu, Rongyu Liao, Shiyi Zhang, Shujun Li, Xinxin Liu
Institutions: Xinxiang University, Shenyang Normal University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4413248424