Electrochemical water oxidation catalyzed by an in situ generated alpha-Co(OH)(2) film on zeolite-Y surface
| Title | Electrochemical water oxidation catalyzed by an in situ generated alpha-Co(OH)(2) film on zeolite-Y surface |
| Publication Type | Journal Article |
| Year of Publication | 2017 |
| Authors | Bose, S, Debgupta, J, Ramsundar, RM, Das, SK |
| Journal | Chemistry-A European Journal |
| Volume | 23 |
| Start Page | 8051-8057 |
| Issue | 33 |
| Pagination | 8051-8057 |
| Date Published | JUN |
| Type of Article | Article |
| ISSN | 0947-6539 |
| Abstract | The design and synthesis of an efficient and robust water-oxidation catalyst with inexpensive materials remains an important challenge in the context of artificial photosynthesis. Herein, a simple but unique technique is reported to in situ generate a thin-film of alpha-Co(OH)(2) on the surface of zeolite-Y [hereafter referred to as Y-alpha-Co(OH)(2)] that acts as an efficient and stable catalyst for electrochemical water oxidation in alkaline medium. Catalyst Y-alpha-Co(OH)(2) is so stable that it retains its catalytic activity even after 2000 cyclic voltammetric cycles of water oxidation. Expectedly, the chemical composition of alpha-Co(OH)(2) on the surface of zeolite-Y remains same as that of parent Y-alpha-Co(OH)(2) after 2000 electrocatalytic cycles. A Tafel slope as low as 59 mV decade(-1) in 0.1m KOH (pH 13) suggests faster oxygen evolution kinetics (overpotential = 329 mV; turnover frequency = 0.35 mol O-2 (mol Co)(-1)s(-1) at 1 mA cm(-2)) than the existing alpha-Co(OH)(2)-based electrocatalysts operating in alkaline medium. |
| DOI | 10.1002/chem.201700955 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 5.771 |
Divison category:
Physical and Materials Chemistry
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