DataVXACS Energy LettersPaper
journal article·2020-10-09

pH Matters When Reducing CO2 in an Electrochemical Flow Cell

Zishuai Zhang, Luke Melo, Ryan P. Jansonius, Faezeh Habibzadeh, Edward R. Grant, Curtis P. Berlinguette

ACS Energy Letters· Volume 5· Issue 10
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Source abstract

Abstract

The pH at the electrocatalyst surface plays a key role in defining the activity and selectivity of the CO2 reduction reaction (CO2RR). We report here operando Raman measurements of the catalyst surface in a customized CO2RR flow cell that enable the measure of pH. Using this flow cell, we were able to measure surface pH as a function of time, current density, and proximity to the catalyst surface during the electrolysis of bicarbonate solutions. We observed that increasing the current density from 0 to 200 mA cm–2 increased the surface pH from 8.5 to 10.3. We also show here that operation at elevated temperatures (70 °C) results in an increased surface pH and serves to suppress the competing and undesirable hydrogen evolution reaction.
Source: openalex_inverted_index · Quality: baseline

Research context

Catalysis & surfaces

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Electrochemical Analysis and Applications · Electrocatalysts for Energy Conversion

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada

Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver, British Columbia V6T 1Z4, Canada

Department of Chemical and Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6Y 1Z3, Canada

Canadian Institute for Advanced Research (CIFAR), 661 University Avenue, Toronto, M5G 1M1 Ontario, Canada

Funding

Canada Foundation for Innovation · Canada Research Chairs · Canadian Institute for Advanced Research · Canadian Natural Science and Engineering Research Council · National Research Council of Canada

References (37)

Show source-provided references
1. 10.1021/acs.accounts.8b0001010.1021/acs.accounts.8b00010 ↗
2. 10.1038/s41557-018-0092-x10.1038/s41557-018-0092-x ↗
3. 10.1021/acsenergylett.0c0089810.1021/acsenergylett.0c00898 ↗
4. 10.1016/j.joule.2019.05.02110.1016/j.joule.2019.05.021 ↗
5. 10.1021/jacs.0c0677910.1021/jacs.0c06779 ↗
6. 10.1039/C9EE02485A10.1039/C9EE02485A ↗
7. 10.1039/D0EE00047G10.1039/D0EE00047G ↗
8. 10.1038/nature1906010.1038/nature19060 ↗
9. 10.1021/jacs.7b0834510.1021/jacs.7b08345 ↗
10. 10.1073/pnas.160298411310.1073/pnas.1602984113 ↗
11. 10.1021/acscatal.9b0005610.1021/acscatal.9b00056 ↗
12. 10.1021/acs.chemrev.8b0070510.1021/acs.chemrev.8b00705 ↗
13. 10.1126/science.aas910010.1126/science.aas9100 ↗
14. 10.1021/ja00462a01210.1021/ja00462a012 ↗
15. 10.1002/anie.20160465410.1002/anie.201604654 ↗
16. 10.1021/acs.jpcc.7b0367310.1021/acs.jpcc.7b03673 ↗
17. 10.1021/acscatal.8b0510910.1021/acscatal.8b05109 ↗
18. 10.1038/s41467-019-08805-x10.1038/s41467-019-08805-x ↗
19. 10.1038/s41467-019-11599-710.1038/s41467-019-11599-7 ↗
20. 10.1021/jacs.9b0700010.1021/jacs.9b07000 ↗
21. 10.1021/acs.iecr.7b0351410.1021/acs.iecr.7b03514 ↗
22. 10.1039/C8EE00097B10.1039/C8EE00097B ↗
23. 10.1002/cssc.20160039410.1002/cssc.201600394 ↗
24. 10.1002/anie.20191263710.1002/anie.201912637 ↗
25. 10.1021/acsenergylett.9b0013710.1021/acsenergylett.9b00137 ↗
26. 10.1155/2013/46707910.1155/2013/467079 ↗
27. 10.1016/j.egypro.2014.11.15210.1016/j.egypro.2014.11.152 ↗
28. 10.1016/S0009-2541(98)00058-810.1016/S0009-2541(98)00058-8 ↗
29. 10.1366/000370286450959210.1366/0003702864509592 ↗
30. 10.1016/j.chemgeo.2010.03.00110.1016/j.chemgeo.2010.03.001 ↗
31. 10.1021/acscatal.8b0103210.1021/acscatal.8b01032 ↗
32. 10.1039/C8EE00019K10.1039/C8EE00019K ↗
33. 10.1039/C8CP01319E10.1039/C8CP01319E ↗
34. 10.1039/c2cp43650g10.1039/c2cp43650g ↗
35. 10.1351/pac19743704049910.1351/pac197437040499 ↗
36. 10.1016/j.apcatb.2015.05.01210.1016/j.apcatb.2015.05.012 ↗
37. 10.1016/0016-7037(95)91550-D10.1016/0016-7037(95)91550-D ↗