The development of processes for electrochemical energy conversion and chemical production could benefit from new strategies to interface chemical redox reactions with electrodes. Here, we employ a diffusible low-potential organic redox mediator, 9,10- anthraquinone-2,7-disulfonic acid (AQDS), to promote efficient electrochemical oxidation of H2 at an off-electrode heterogeneous catalyst. This unique approach to integrate chemical and electrochemical redox processes accesses power densities up to 228 mW/cm2 (528 mW/cm2 with iR-correction). These values are significantly higher than those observed in previous mediated electrochemical H2 oxidation methods, including those using enzymes or inorganic mediators. The approach described herein shows how traditional catalytic chemistry can be coupled to electrochemical devices. Financial support for this project was provided by the Center for Molecular Electrocatalysis, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. Supplemental funds from the Wisconsin Alumni Research Foundation (WARF) through the WARF Accelerator Program provided partial support for YP and CWA. NMR spectroscopy facilities were partially supported by the NSF (CHE-1048642) and the NIH (S10 OD012245).
Preger, Yuliya, et al. "Anthraquinone-Mediated Fuel Cell Anode with an Off-Electrode Heterogeneous Catalyst Accessing High Power Density When Paired with a Mediated Cathode." ACS Energy Letters, vol. 2020, no. 5, May. 2020. https://doi.org/10.1021/acsenergylett.0c00631
Preger, Yuliya, Johnson, Mathew R., Biswas, Sourav, Anson, Colin W., Root, Thatcher W., & Stahl, Shannon S. (2020). Anthraquinone-Mediated Fuel Cell Anode with an Off-Electrode Heterogeneous Catalyst Accessing High Power Density When Paired with a Mediated Cathode. ACS Energy Letters, 2020(5). https://doi.org/10.1021/acsenergylett.0c00631
Preger, Yuliya, Johnson, Mathew R., Biswas, Sourav, et al., "Anthraquinone-Mediated Fuel Cell Anode with an Off-Electrode Heterogeneous Catalyst Accessing High Power Density When Paired with a Mediated Cathode," ACS Energy Letters 2020, no. 5 (2020), https://doi.org/10.1021/acsenergylett.0c00631
@article{osti_1700525,
author = {Preger, Yuliya and Johnson, Mathew R. and Biswas, Sourav and Anson, Colin W. and Root, Thatcher W. and Stahl, Shannon S.},
title = {Anthraquinone-Mediated Fuel Cell Anode with an Off-Electrode Heterogeneous Catalyst Accessing High Power Density When Paired with a Mediated Cathode},
annote = {The development of processes for electrochemical energy conversion and chemical production could benefit from new strategies to interface chemical redox reactions with electrodes. Here, we employ a diffusible low-potential organic redox mediator, 9,10- anthraquinone-2,7-disulfonic acid (AQDS), to promote efficient electrochemical oxidation of H2 at an off-electrode heterogeneous catalyst. This unique approach to integrate chemical and electrochemical redox processes accesses power densities up to 228 mW/cm2 (528 mW/cm2 with iR-correction). These values are significantly higher than those observed in previous mediated electrochemical H2 oxidation methods, including those using enzymes or inorganic mediators. The approach described herein shows how traditional catalytic chemistry can be coupled to electrochemical devices. Financial support for this project was provided by the Center for Molecular Electrocatalysis, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. Supplemental funds from the Wisconsin Alumni Research Foundation (WARF) through the WARF Accelerator Program provided partial support for YP and CWA. NMR spectroscopy facilities were partially supported by the NSF (CHE-1048642) and the NIH (S10 OD012245).},
doi = {10.1021/acsenergylett.0c00631},
url = {https://www.osti.gov/biblio/1700525},
journal = {ACS Energy Letters},
number = {5},
volume = {2020},
place = {United States},
year = {2020},
month = {05}}
Energy Frontier Research Centers (EFRC) (United States). Center for Molecular Electrocatalysis (CME); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1700525
Report Number(s):
PNNL-SA-150887
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 5 Vol. 2020