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Title: Using earth abundant materials for long duration energy storage: electro-chemical and thermo-chemical cycling of bicarbonate/formate

Journal Article · · Green Chemistry
DOI: https://doi.org/10.1039/d3gc00219e · OSTI ID:1988264

Using hydrogen to store energy in chemical bonds is a key component of the global strategy to achieving a sustainable future and ameliorating climate change. The challenges associated with handling molecular hydrogen can be solved by using liquid hydrogen carriers. In this perspective, we discuss the concept of bicarbonate–formate cycle, where aqueous solutions of formate ions (HCO2) are used as hydrogen and energy carriers. Such solutions are composed by earth abundant elements and, in contrast to common liquid organic carriers, are non-flammable, and readily convert to the oxide forms (HCO3) under reaction with water to release hydrogen, or electrons, at moderate temperatures. We discuss thermodynamic aspects of the bicarbonate–formate cycle and show how it offers the opportunity of combining electrochemical and thermochemical operations, as well as of coupling CO2 capture with energy/hydrogen storage. We emphasize the potential role of electrochemistry in the generation of formate and in the release of energy in the form of electricity. At present, more information on both the fundamental and systems level, is needed to identify the feasible scenarios for using formate/bicarbonate salts for hydrogen/energy storage. It is likely, however, that several strategies, including hybrid electrochemical–thermochemical approaches, will suit different applications. It is also clear that more integration between the disciplines of electrochemistry and heterogeneous catalysis is needed to overcome the challenges for advancing the HCO3–HCO2 system as a feasible green alternative for storing and transporting energy.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Hydrogen Fuel Cell Technologies Office (HFTO)
Grant/Contract Number:
AC05-76RL01830; AC36-08GO28308
OSTI ID:
1988264
Report Number(s):
PNNL-SA-183128
Journal Information:
Green Chemistry, Vol. 25, Issue 11; ISSN 1463-9262
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

References (46)

Enhancing H2 evolution by optimizing H adatom combination and desorption over Pd nanocatalyst journal March 2017
Direct formate fuel cells: A review journal July 2016
The conversion of polysaccharides to hydrogen gas. Part I: The palladium catalysed decomposition of formic acid/sodium formate solutions journal January 1988
Deactivation/reactivation of a Pd/C catalyst in a direct formic acid fuel cell (DFAFC): Use of array membrane electrode assemblies journal February 2009
Iron-iron oxide supported palladium catalyst for the interconversion of formate and carbon dioxide journal January 2022
An industrial perspective on catalysts for low-temperature CO2 electrolysis journal January 2021
Application of Liquid Hydrogen Carriers in Hydrogen Steelmaking journal March 2021
Formate‐Bicarbonate Cycle as a Vehicle for Hydrogen and Energy Storage journal December 2020
Formate: an Energy Storage and Transport Bridge between Carbon Dioxide and a Formate Fuel Cell in a Single Device journal October 2015
Chemical equilibrium of hydrogen and aqueous solutions of 1:1 bicarbonate and formate salts with a common cation journal July 1997
Highly Efficient Supported Palladium–Gold Alloy Catalysts for Hydrogen Storage Based on Ammonium Bicarbonate/Formate Redox Cycle journal February 2019
CO2-“Neutral” Hydrogen Storage Based on Bicarbonates and Formates journal May 2011
Bicarbonate or Carbonate Processes for Coupling Carbon Dioxide Capture and Electrochemical Conversion journal March 2020
The direct formate fuel cell with an alkaline anion exchange membrane journal September 2012
The Central Role of Bicarbonate in the Electrochemical Reduction of Carbon Dioxide on Gold journal March 2017
Integrated CO 2 Capture and Removal via Carbon Mineralization with Inherent Regeneration of Aqueous Solvents journal April 2021
Direct Observation on Reaction Intermediates and the Role of Bicarbonate Anions in CO 2 Electrochemical Reduction Reaction on Cu Surfaces journal October 2017
Importance of Acid–Base Equilibrium in Electrocatalytic Oxidation of Formic Acid on Platinum journal June 2013
Carbon-neutral sustainable energy technology: Direct ethanol fuel cells journal October 2015
Pd-Catalyzed Electrohydrogenation of Carbon Dioxide to Formate: High Mass Activity at Low Overpotential and Identification of the Deactivation Pathway journal April 2015
Mass transport phenomena in direct methanol fuel cells journal June 2009
Thermodynamics of the cyclic formate/bicarbonate interconversion for hydrogen storage journal August 2022
Electrochemical reduction of aqueous bicarbonate to formate with high current efficiency near the thermodynamic potential at chemically derivatized electrodes journal June 1984
Formate salts as chemical carriers in hydrogen storage and transportation journal January 1986
Status and perspectives of CO2 conversion into fuels and chemicals by catalytic, photocatalytic and electrocatalytic processes journal January 2013
An integrated device to convert carbon dioxide to energy journal December 2016
Electrolytic Conversion of Bicarbonate into CO in a Flow Cell journal June 2019
Electrocatalytic valorization into H2 and hydrocarbons of an aqueous stream derived from hydrothermal liquefaction journal July 2020
The heterogeneous catalytic hydrogenation of bicarbonate to formate in aqueous solutions journal March 1988
Electrochemical Conversion of Bicarbonate to Formate Mediated by the Complex Ru III (edta) (edta 4- = ethylenediaminetetraacetate): Electrochemical Conversion of Bicarbonate Mediated by Ru III (edta) journal October 2014
Development of an Autothermal Formate-Based Hydrogen Generator: From Optimization of Formate Dehydrogenation Conditions to Thermal Integration with Fuel Cells journal June 2020
Highly Efficient Hydrogen Storage System Based on Ammonium Bicarbonate/Formate Redox Equilibrium over Palladium Nanocatalysts journal February 2015
Research Requirements to Move the Bar forward Using Aqueous Formate Salts as H2 Carriers for Energy Storage Applications journal November 2020
Dynamic modeling of compressed gas energy storage to complement renewable wind power intermittency journal June 2013
Conversion of Bicarbonate to Formate in an Electrochemical Flow Reactor journal July 2020
Challenges and opportunities for using formate to store, transport, and use hydrogen journal February 2020
Formate/bicarbonate interconversion for safe hydrogen storage: A review journal March 2023
Bicarbonate Is Not a General Acid in Au-Catalyzed CO 2 Electroreduction journal November 2017
Electrochemically-Rechargeable Liquids in Highly Flexible Energy Storage Systems journal October 2021
Hydrogen Production by Selective Dehydrogenation of HCOOH Catalyzed by Ru-Biaryl Sulfonated Phosphines in Aqueous Solution journal August 2014
Amine-Free Reversible Hydrogen Storage in Formate Salts Catalyzed by Ruthenium Pincer Complex without pH Control or Solvent Change journal March 2015
Electrochemical production of syngas from CO 2 captured in switchable polarity solvents journal January 2018
Hydrogen Storage in Formic Acid: A Comparison of Process Options journal November 2017
Palladium-Copper Electrocatalyst for Promotion of Oxidation of Formate and Ethanol in Alkaline Media journal August 2014
Impact of Alkali Cation Identity on the Conversion of HCO 3 to CO in Bicarbonate Electrolyzers journal June 2021
CO 2 Electroreduction from Carbonate Electrolyte journal May 2019