Journal article 426 views
A highly active nickel electrocatalyst shows excellent selectivity for CO2 reduction in acidic media
Gaia Neri,
Iain Aldous,
James J. Walsh,
Laurence J. Hardwick,
Alexander J. Cowan
Chemical Science, Volume: 7, Issue: 2, Pages: 1521 - 1526
Swansea University Author: Iain Aldous
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DOI (Published version): 10.1039/C5SC03225C
Abstract
The development of selective electrocatalysts for CO2 reduction in water offers a sustainable route to carbon based fuels and feedstocks. However, molecular catalysts are typically studied in non-aqueous solvents, in part to avoid competitive H2 evolution. [Ni(cyclam)]2+ (1) is one of the few known...
| Published in: | Chemical Science |
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| ISSN: | 2041-6520 2041-6539 |
| Published: |
2016
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa51336 |
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| Abstract: |
The development of selective electrocatalysts for CO2 reduction in water offers a sustainable route to carbon based fuels and feedstocks. However, molecular catalysts are typically studied in non-aqueous solvents, in part to avoid competitive H2 evolution. [Ni(cyclam)]2+ (1) is one of the few known electrocatalysts that operate in water and 30 years after its report its activity remains a rarely surpassed benchmark. Here we report that [Ni(cyclam-CO2H)]2+ (cyclam-CO2H = 1,4,8,11-tetraazacyclotetradecane-6-carboxylic acid (2)) shows greatly enhanced activity versus1 for CO production. At pHs < pKa of the pendant carboxylic acid a large increase in catalytic activity occurs. Remarkably, despite the high proton concentration (pH 2), 2 maintains selectivity for CO2 reduction and is believed to be unique in operating selectively in such acidic aqueous solutions. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
2 |
| Start Page: |
1521 |
| End Page: |
1526 |