{"product_id":"cco2rrzbfbeaedtmpa","title":"EDTMPA (Ethylenediamine Tetramethylenephosphonic Acid, \u003e98%) Powder as Electrolyte Additive for CO2 Electroreduction (CO2RR) and Zinc-Bromine Flow Battery, CCO2RRZBFBEAEDTMPA","description":"\u003cp\u003eIn electrochemical CO2 reduction (CO2RR), EDTMPA (Ethylenediamine tetra(methylene phosphonic acid)) is a multi-functional electrolyte additive used primarily as a metal ion sequestrant, surface modifier, and HER (Hydrogen Evolution Reaction) suppressor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSequestration of Impurity Ions\u003c\/strong\u003e: The most critical role of EDTMPA is protecting the catalyst from poisoning. Even high-purity aqueous electrolytes (KHCO3) often contain trace amounts of transition metal ions (like Fe2+, Zn2+, or Pb2+). During long-term electrolysis, these ions deposit onto the cathode surface. EDTMPA is a powerful chelating agent that binds to these trace metal impurities in the bulk electrolyte, preventing them from electrodepositing onto the active catalyst. This is essential for maintaining the selectivity of Copper or Silver catalysts over long periods. \u003cstrong\u003eSuppression of the Hydrogen Evolution Reaction (HER)\u003c\/strong\u003e: EDTMPA helps steer the reaction away from water splitting and toward CO2 conversion. The large, negatively charged EDTMPA molecules adsorb onto the electrode surface. This creates a \"steric barrier\" that hinders the approach of water molecules to the active sites.  By limiting the availability of protons (H+) at the surface, EDTMPA effectively suppresses the HER, thereby increasing the Faradaic Efficiency (FE) for CO2 reduction products.\u003c\/p\u003e\n\u003cp\u003eWhile for zinc-bromide flow battery, EDTMPA can be mainly used to \u003cstrong\u003econtrol zinc morphology and prevent dendrite growth\u003c\/strong\u003e, which are the leading causes of short-circuiting and capacity fade in these systems. Zinc tends to deposit unevenly, forming needle-like \"dendrites\" that can puncture the membrane. EDTMPA molecules adsorb onto the high-energy sites (the \"tips\") of growing zinc crystals. This creates a local barrier that forces the zinc ions (Zn2+) to deposit on flatter, lower-energy areas instead. This results in a smooth, dense, and uniform zinc plating layer rather than a porous or \"mossy\" structure, significantly extending the cycle life of the battery. (2) \u003cstrong\u003eChelating and Complexing Zn2+\u003c\/strong\u003e. The four phosphonic acid groups in EDTMPA provide strong binding sites for zinc ions. EDTMPA forms stable complexes with Zn2+ in the aqueous electrolyte. This effectively \"regulates\" the concentration of free zinc ions available at the electrode surface during charging. By controlling the rate of ion delivery to the cathode, EDTMPA helps prevent the local ion depletion that usually triggers unstable, non-planar growth.\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 100%; height: 192.637px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 40.2375px;\"\u003e\n\u003ctd style=\"width: 35.0575%; height: 40.2375px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%; height: 40.2375px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCCO2RREAEDTMPA (C-CO2RR-EA-EDTMPA)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.0575%;\"\u003e\u003cem\u003eCAS\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%;\"\u003e\n\u003cp\u003e\u003cspan\u003e1429-50-1\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.0575%;\"\u003e\u003cem\u003eChemical Formula\/Structure\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%;\"\u003e\n\u003cdiv style=\"text-align: left;\"\u003eC6H20N2O12P4\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CCO2RREAEDTMPA_molecular_structure_160x160.png?v=1771907290\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 35.0575%; height: 35.6px;\"\u003e\u003cem\u003eAppearance\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eWhite powder\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.0575%;\"\u003e\u003cem\u003eMolecular Weight\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%;\"\u003e\n\u003cp\u003e\u003cspan\u003e436.12\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.0575%;\"\u003e\u003cem\u003eEDTMPA on Cu Catalyst\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%;\"\u003e\n\u003cp\u003e\u003cspan\u003eStabilizes Cu+ species and promote the formation of multicarbon (C2) products like ethylene by preserving oxide-derived surface features.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.0575%;\"\u003e\u003cem\u003eEDTMPA on Ag Catalyst\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%;\"\u003e\n\u003cp\u003e\u003cspan\u003eSuppresses HER and Enhances the FE for Carbon Monoxide (CO), especially at low overpotentials where impurities usually dominate.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.0575%;\"\u003e\u003cem\u003eEDTMPA on Bi\/Sn Catalyst\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%;\"\u003e\n\u003cp\u003eBuffers local pH and Helps maintain the high local pH required to stabilize Formate intermediates.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.0575%;\"\u003e\u003cem\u003eEDTMPA for Zinc-Br Flow Battery\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%;\"\u003e\n\u003cp\u003e1. Prevents short-circuits, allowing for thousands of charge\/discharge cycles.\u003c\/p\u003e\n\u003cp\u003e2. Slightly increases overpotential, but results in a more stable discharge voltage profile.\u003c\/p\u003e\n\u003cp\u003e3. Protects the zinc anode from self-discharge (corrosion) during standby periods.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.0575%;\"\u003e\u003cem\u003ePackage Grade\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%;\"\u003e\n\u003cp\u003e\u003cspan\u003e25 g\/bottle (other package sizes, such as 100 g, 500 g, 1 kg can be supplied upon request)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReferences\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e(1）\u003ca href=\"https:\/\/www.nature.com\/articles\/s41467-022-30819-1\"\u003eZ. Han, et al., Steering surface reconstruction of copper with electrolyte additives for CO2 electroreduction, Nature Communications, 2022, 13, 3158\u003c\/a\u003e. \u003c\/p\u003e\n\u003cp\u003e(2) \u003ca href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/anie.202418669\"\u003eW. Xia, et al., Multidentate Chelating Ligands Enable High-Performance Zinc-Bromine Flow Batteries, Angew Chem Int. Ed., 2025, 64, e202418669\u003c\/a\u003e\u003ca href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0376738820310255\"\u003e.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"MKL","offers":[{"title":"Default Title","offer_id":47379602407654,"sku":"CCO2RRZBFBEAEDTMPA","price":59.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CCO2RRZBFBEAEDTMPA_main.png?v=1771908858","url":"https:\/\/echemsupplies.com\/products\/cco2rrzbfbeaedtmpa","provider":"EChem Supplies","version":"1.0","type":"link"}