Facile Synthesis of Nanoporous Transition Metal‐Based Phosphates for Oxygen Evolution Reaction

Due to unique structural porosity, low‐cost, and good catalytic activity, oxygen evolution reactions over 3d transition elements have gained immense attention in recent years. Herein, we report the fabrication of three different metal phosphates, e. g. Co‐phosphate (CoPO), Ni‐phosphate (NiPO), and N...

Full description

Saved in:
Bibliographic Details
Published in:ChemCatChem 2020-04, Vol.12 (7), p.2091-2096
Main Authors: Bhanja, Piyali, Kim, Yena, Paul, Bappi, Lin, Jianjian, Alshehri, Saad M., Ahamad, Tansir, Kaneti, Yusuf Valentino, Bhaumik, Asim, Yamauchi, Yusuke
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Catalytic activity
Chemical synthesis
Electrocatalysis
Metal phosphates
Microplates
Monoclinic structure
Nickel
Oxygen evolution reaction
Oxygen evolution reactions
Phosphates
Phosphoric acid
Porosity
Surface area
Transition metals
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Due to unique structural porosity, low‐cost, and good catalytic activity, oxygen evolution reactions over 3d transition elements have gained immense attention in recent years. Herein, we report the fabrication of three different metal phosphates, e. g. Co‐phosphate (CoPO), Ni‐phosphate (NiPO), and Ni−Co‐phosphate (NiCoPO) using the corresponding metal sources and phosphoric acid as a phosphorus source under hydrothermal conditions without using any structure‐directing agent. Since the as‐prepared metal‐based phosphates exhibit high surface area with good interparticle porosity and contain transition metals in the material frameworks, these materials have been investigated for electrocatalytic oxygen evolution reaction (OER). Among the three metal phosphates, the as‐synthesized CoPO catalyst shows efficient electrocatalytic activity toward OER, with an overpotential of 350 mV at 10 mA cm−2 in 1.0 M KOH solution and a relatively low Tafel slope of 60.7 mV dec−1. The good electrocatalytic performance of CoPO is attributed to its higher specific surface area and pore volume compared to other two catalysts. The CoPO‐modified electrode also shows a high stability up to 15 h at a constant potential of 1.58 V, suggesting its promising future for OER catalysis. Porous metal phosphates for electrochemical water oxidation: Three different transition metal‐based phosphates have been synthesized under hydrothermal conditions which have been explored for electrochemical water oxidation reaction in alkaline KOH solution.
ISSN:1867-3880
1867-3899
DOI:10.1002/cctc.201901803