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Oxygen‐Deficient Ti 0.9 Nb 0.1 O 2‐x as an Efficient Anodic Catalyst Support for PEM Water Electrolyzer
Author(s) -
Lv Hong,
Wang Sen,
Hao Chuanpu,
Zhou Wei,
Li Jiakun,
Xue Mingzhe,
Zhang Cunman
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201900090
Subject(s) - anode , electrolyte , catalysis , oxygen evolution , electrolysis , oxygen , cathode , electrolysis of water , chemistry , chemical engineering , nafion , inorganic chemistry , materials science , analytical chemistry (journal) , electrochemistry , electrode , environmental chemistry , organic chemistry , engineering
Herein, the low cost and efficient oxygen‐deficient Ti 0.9 Nb 0.1 O 2‐x as support of IrO 2 (noted as IrO 2 /TNO) anode catalyst for the PEM water electrolyzer is synthesized and then characterized using a series of techniques. Oxygen vacancies are introduced by hydrogenation treatment. The IrO 2 /TNO sample after hydrogenation (noted as IrO 2 /TNO−Hx, x corresponds to the hydrogenation temperature) exhibits enhanced electronic conductivity and increased surface active sites relative to that of the pristine IrO 2 /TNO sample. A single cell is assembled by IrO 2 /TNO−Hx as anode catalyst, commercial Pt/C as cathode catalytic and Nafion 117 membrane as electrolyte. At a low loading mass of IrO 2 , the IrO 2 /TNO−H750 sample shows the optimum oxygen evolution reaction (OER) activity (1.832 V at 1 A ⋅ cm −2 ), which is superior to that of unsupported IrO 2 (1.858 eV at 1 A ⋅ cm −2 ), and remains stable for 100 h operating at a current density of 1 A cm −2 . This work provides a rational design strategy for developing low cost and efficient anode catalysts support.