Low-Coordinate Iridium Oxide Confined on Graphitic Carbon Nitride for Highly Efficient Oxygen Evolution
- 1 September 2019
- journal article
- research article
- Published by Wiley in Angewandte Chemie-International Edition
- Vol. 58 (36), 12540-12544
- https://doi.org/10.1002/anie.201907017
Abstract
Highly active and durable electrocatalysts for the oxygen evolution reaction (OER) is greatly desired. Iridium oxide/graphitic carbon nitride (IrO2/GCN) heterostructures are designed with low-coordinate IrO2 nanoparticles (NPs) confined on superhydrophilic highly stable GCN nanosheets for efficient acidic OER. The GCN nanosheets not only ensure the homogeneous distribution and confinement of IrO2 NPs but also endows the heterostructured catalyst system with a superhydrophilic surface, which can maximize the exposure of active sites and promotes mass diffusion. The coordination number of Ir atoms is decreased owing to the strong interaction between IrO2 and GCN, leading to lattice strain and increment of electron density around Ir sites and hence modulating the attachment between the catalyst and reaction intermediates. The optimized IrO2/GCN heterostructure delivers not only by far the highest mass activity among the reported IrO2-based catalysts but also decent durability.Keywords
Funding Information
- Australian Research Council (DE160100596)
This publication has 36 references indexed in Scilit:
- Encapsulating Iridium Nanoparticles Inside a 3D Cage‐Like Organic Network as an Efficient and Durable Catalyst for the Hydrogen Evolution ReactionAdvanced Materials, 2018
- Hybrid 2D Dual-Metal-Organic Frameworks for Enhanced Water Oxidation CatalysisAdvanced Functional Materials, 2018
- Hexagonal-Phase Cobalt Monophosphosulfide for Highly Efficient Overall Water SplittingACS Nano, 2017
- Electrocatalytic Oxygen Evolution Reaction in Acidic Environments – Reaction Mechanisms and CatalystsAdvanced Energy Materials, 2016
- Engineering surface atomic structure of single-crystal cobalt (II) oxide nanorods for superior electrocatalysisNature Communications, 2016
- NiCoFe Layered Triple Hydroxides with Porous Structures as High-Performance Electrocatalysts for Overall Water SplittingACS Energy Letters, 2016
- Integrated Three-Dimensional Carbon Paper/Carbon Tubes/Cobalt-Sulfide Sheets as an Efficient Electrode for Overall Water SplittingACS Nano, 2016
- A comprehensive review on PEM water electrolysisInternational Journal of Hydrogen Energy, 2013
- Universality in Oxygen Evolution Electrocatalysis on Oxide SurfacesChemCatChem, 2011
- Sustainable Hydrogen ProductionScience, 2004