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Pd‐Decorated Tungsten as Pt‐Free Bimetallic Catalysts for Hydrogen Oxidation Reaction in Alkaline Electrolyte
Author(s) -
Arulrajan Antony Cyril,
Subramanian Palaniappan,
Singh Ramesh Kumar,
Schechter Alex
Publication year - 2020
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.201900140
Subject(s) - chemistry , catalysis , bimetallic strip , tungsten , inorganic chemistry , electrochemistry , electrolyte , desorption , nanoparticle , hydrogen , membrane , chemical engineering , adsorption , electrode , organic chemistry , biochemistry , engineering
Developing Pt‐free catalysts for hydrogen oxidation reaction (HOR) in alkaline solution is becoming a key challenge in the development of anion exchange membrane fuel cells and electrochemical reactors. Herein, we present the preparation, HOR activity, and stability of Pd‐decorated tungsten (Pd‐d‐W) catalysts. The Pd‐d‐W catalysts were prepared by the chemically activated surface of tungsten nanoparticles by Pd ions. The resultant bimetallic catalysts consisted of crystalline phases of both Pd and W nanoparticles. The CO stripping voltammograms and H‐desorption (H des ) peak potential of hydrogen desorption in Pd suggests that the enhancement of HOR catalytic activity observed in Pd‐d‐W catalyst can be ascribed to the modification of electronic property of Pd and availability of OH ad near‐surface Pd atoms.