Efficient Renewable-to-Hydrogen Conversion via Decoupled Electrochemical Water Splitting
Source abstract
Abstract
Water electrolysis powered by renewables provides a green approach to hydrogen production to support the “hydrogen economy.” However, the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) are tightly coupled in both time and space in traditional water electrolysis, which brings inherent operational challenges, such as the mixture of H2/O2 and the limited HER rate caused by the sluggish kinetics of OER. Against this background, decoupling H2 and O2 production in water electrolysis by using the auxiliary redox mediator was first proposed in 2013, in which O2 and H2 are produced at different times, rates, and/or locations. The decoupling strategy offers not only a new way to facilitate renewables to H2, but it can also be applied in other chemical or electrochemical processes. This review describes recent efforts to develop high-performance redox mediators, optimized strategies in decoupled water electrolysis, the design of electrolyzer configuration, the challenges faced, and the prospective directions.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Hybrid Renewable Energy Systems
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (53)
Show source-provided references
1. The hydrogen economy – vision or reality?10.1016/j.ijhydene.2015.04.032 ↗
2. Re-envisioning the role of hydrogen in a sustainable energy economy10.1016/j.ijhydene.2011.09.137 ↗
3. Current status of hydrogen energy10.1016/S1364-0321(02)00004-7 ↗
4. Technical and economic feasibility of centralized facilities for solar hydrogen production via photocatalysis and photoelectrochemistry10.1039/c3ee40831k ↗
5. Sustainable hydrogen production10.1126/science.1103197 ↗
6. Air pollution and climate-forcing impacts of a global hydrogen economy10.1126/science.1089527 ↗
7. The hydrogen economy10.1063/1.1878333 ↗
8. A realizable renewable energy future10.1126/science.285.5428.687 ↗
9. Recent progress in alkaline water electrolysis for hydrogen production and applications10.1016/j.pecs.2009.11.002 ↗
10. Water electrolysis: divide and conquer10.1038/nchem.1634 ↗
11. A comprehensive review on PEM water electrolysis10.1016/j.ijhydene.2013.01.151 ↗
12. Innovative Strategies for Electrocatalytic Water Splitting10.1021/acs.accounts.8b00002 ↗
13. Design of electrocatalysts for oxygen- and hydrogen-involving energy conversion reactions10.1039/C4CS00470A ↗
14. Noble metal-free hydrogen evolution catalysts for water splitting10.1039/C4CS00448E ↗
15. Hydrogen evolution by a metal-free electrocatalyst10.1038/ncomms4783 ↗
16. Decoupling Strategies in Electrochemical Water Splitting and Beyond10.1016/j.joule.2018.06.011 ↗
17. Recent Progress in Decoupled H2 and O2 Production from Electrolytic Water Splitting10.1002/celc.201801671 ↗
18. Decoupled catalytic hydrogen evolution from a molecular metal oxide redox mediator in water splitting10.1126/science.1257443 ↗
19. Decoupling hydrogen and oxygen evolution during electrolytic water splitting using an electron-coupled-proton buffer10.1038/nchem.1621 ↗
20. Photosynthetic energy conversion: natural and artificial10.1039/B802262N ↗
21. Theoretical and experimental aspects of a two-step short cycle based on ZnO and CdO intended for storage of solar energy10.1002/er.4440070206 ↗
22. Thermochemical hydrogen production: past and present10.1016/S0360-3199(00)00062-8 ↗
23. Solar-Driven Water Oxidation and Decoupled Hydrogen Production Mediated by an Electron-Coupled-Proton Buffer10.1021/jacs.6b03187 ↗
24. Water Splitting via Decoupled Photocatalytic Water Oxidation and Electrochemical Proton Reduction Mediated by Electron-Coupled-Proton Buffer10.1002/asia.201701123 ↗
25. Catalytic hydrogen evolution and semihydrogenation of organic compounds using silicotungstic acid as an electron-coupled-proton buffer in water-organic solvent mixtures10.1016/j.jcat.2019.09.011 ↗
26. Tuning Redox Active Polyoxometalates for Efficient Electron-Coupled Proton-Buffer-Mediated Water Splitting10.1002/chem.201903142 ↗
27. Highly reduced and protonated aqueous solutions of [P2W18O62]6− for on-demand hydrogen generation and energy storage10.1038/s41557-018-0109-5 ↗
28. Renewable hydrogen generation from a dual-circuit redox flow battery10.1039/C4EE00098F ↗
29. All-vanadium dual circuit redox flow battery for renewable hydrogen generation and desulfurisation10.1039/C5GC02196K ↗
30. Decoupling H2(g) and O2(g) Production in Water Splitting by a Solar-Driven V3+/2+ (aq,H2SO4)|KOH(aq)10.1021/acsenergylett.9b00278 ↗
31. A bio-inspired, small molecule electron-coupled-proton buffer for decoupling the half-reactions of electrolytic water splitting10.1021/ja4071893 ↗
32. A practical, organic-mediated, hybrid electrolyser that decouples hydrogen production at high current densities10.1039/C7SC05388F ↗
33. Organic Proton-Buffer Electrode to Separate Hydrogen and Oxygen Evolution in Acid Water Electrolysis10.1002/anie.201814625 ↗
34. Decoupling Hydrogen and Oxygen Production in Acidic Water Electrolysis Using a Polytriphenylamine-Based Battery Electrode10.1002/anie.201800436 ↗
35. Decoupling half-reactions of electrolytic water splitting by integrating a polyaniline electrode10.1039/C9TA03285A ↗
36. Low-cost and high safe manganese-based aqueous battery for grid energy storage and conversion10.1016/j.scib.2019.09.020 ↗
37. Advanced alkaline water electrolysis10.1016/j.electacta.2012.05.011 ↗
38. Separating hydrogen and oxygen evolution in alkaline water electrolysis using nickel hydroxide10.1038/ncomms11741 ↗
39. Combining water reduction and liquid fuel oxidization by nickel hydroxide for flexible hydrogen production10.1016/j.ensm.2017.11.001 ↗
40. Photoelectrochemical water splitting in separate oxygen and hydrogen cells10.1038/nmat4876 ↗
41. Decoupled hydrogen and oxygen evolution by a two-step electrochemical–chemical cycle for efficient overall water splitting10.1038/s41560-019-0462-7 ↗
42. A Hydrogen-Evolving Hybrid-Electrolyte Battery with Electrochemical/Photoelectrochemical Charging from Water Oxidation10.1002/cssc.201601317 ↗
43. Renewable Hydrogen and Electricity Dispatch with Multiple Ni-Fe Electrode Storage10.1021/acsenergylett.8b02488 ↗
44. Electrolyzer Design for Flexible Decoupled Water Splitting and Organic Upgrading with Electron Reservoirs10.1016/j.chempr.2017.12.019 ↗
45. Closed Bipolar Electrodes for Spatial Separation of H2 and O2 Evolution during Water Electrolysis and the Development of High-Voltage Fuel Cells10.1021/acsami.7b04226 ↗
46. Low voltage water electrolysis: decoupling hydrogen production using bioelectrochemical system10.1016/j.ijhydene.2018.06.080 ↗
47. Progress in Aqueous Rechargeable Sodium-Ion Batteries10.1002/aenm.201703008 ↗
48. Recent Progress of Rechargeable Batteries Using Mild Aqueous Electrolytes10.1002/smtd.201800272 ↗
49. A clean and membrane-free chlor-alkali process with decoupled Cl2 and H2/NaOH production10.1038/s41467-018-02877-x ↗
50. Electrocatalytic and photocatalytic hydrogen evolution integrated with organic oxidation10.1039/C8CC01830H ↗
51. A General Strategy for Decoupled Hydrogen Production from Water Splitting by Integrating Oxidative Biomass Valorization10.1021/jacs.6b07127 ↗
52. Decoupled electrolysis using a silicotungstic acid electron-coupled-proton buffer in a proton exchange membrane cell10.1016/j.electacta.2019.135255 ↗
53. Selective hydrogenation of nitroarenes using an electrogenerated polyoxometalate redox mediator10.1039/C7CC09036F ↗