Open AccessTensile‐Strained RuO 2 Loaded on Antimony‐Tin Oxide by Fast Quenching for Proton‐Exchange Membrane Water Electrolyzer
Author(s) -
Huang Bing,
Xu Hengyue,
Jiang Nannan,
Wang Minghao,
Huang Jianren,
Guan Lunhui
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202201654
Subject(s) - overpotential , materials science , catalysis , oxygen evolution , proton exchange membrane fuel cell , oxide , chemical engineering , water splitting , tin oxide , exchange current density , inorganic chemistry , quenching (fluorescence) , electrolysis , electrochemistry , chemistry , metallurgy , electrode , tafel equation , electrolyte , organic chemistry , physics , photocatalysis , quantum mechanics , engineering , fluorescence
Future energy demands for green hydrogen have fueled intensive research on proton‐exchange membrane water electrolyzers (PEMWE). However, the sluggish oxygen evolution reaction (OER) and highly corrosive environment on the anode side narrow the catalysts to be expensive Ir‐based materials. It is very challenging to develop cheap and effective OER catalysts. Herein, Co‐hexamethylenetetramine metal–organic framework (Co‐HMT) as the precursor and a fast‐quenching method is employed to synthesize RuO 2 nanorods loaded on antimony‐tin oxide (ATO). Physical characterizations and theoretical calculations indicate that the ATO can increase the electrochemical surface areas of the catalysts, while the tensile strains incorporated by quenching can alter the electronic state of RuO 2 . The optimized catalyst exhibits a small overpotential of 198 mV at 10 mA cm −2 for OER, and keeps almost unchanged after 150 h chronopotentiometry. When applied in a real PEMWE assembly, only 1.51 V is needed for the catalyst to reach a current density of 1 A cm −2 .