{"product_id":"cefceptcrc","title":"Platinum-Chromium (Pt-Cr, Premetek) Alloy on Carbon Black as Electrocatalysts for Electrolyzer and Fuel Cell, 0.5 g\/bottle, CEFCEPtCrC","description":"\u003cp\u003ePlatinum-Chromium (Pt-Cr) electrocatalysts are a specialized class of materials often chosen for their exceptional stability and specific electronic properties. While Pt-Co and Pt-Ni dominate the \"highest activity\" headlines, Pt-Cr is frequently favored in long-term durability studies and specific aerospace or heavy-duty applications.\u003c\/p\u003e\n\u003cp\u003eIn fuel cells, Pt-Cr is primarily used at the cathode for the Oxygen Reduction Reaction (ORR). (1) \u003cstrong\u003eElectronic Modification\u003c\/strong\u003e: Like other 3d transition metals, Chromium modifies the platinum lattice. It contracts the Pt-Pt bond distance (strain effect) and shifts the d-band center. This reduces the binding energy of oxygen intermediates (OH*), preventing the platinum surface from becoming \"blocked\" and allowing the reaction to proceed faster than on pure Pt\/C. (2) \u003cstrong\u003eCorrosion Resistance\u003c\/strong\u003e: Chromium is known for its ability to form a very stable, thin protective oxide layer. In the harsh, acidic, and high-voltage environment of a fuel cell cathode, Pt-Cr often shows better resistance to \"metal leaching\" than Pt-Ni or Pt-Cu. (3) \u003cstrong\u003eActivity vs. Durability\u003c\/strong\u003e: While its peak activity might be slightly lower than Pt-Ni, its retention of activity over thousands of voltage cycles is often superior. This makes it a strong candidate for heavy-duty vehicles (trucks\/buses) where the stack must last 20,000+ hours.\u003c\/p\u003e\n\u003ctable style=\"width: 100.036%; height: 309.212px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 46.6125px;\"\u003e\n\u003ctd style=\"width: 29.6656%; height: 46.6125px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 46.6125px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCEFCEPtCr31C20\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 46.6125px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCEFCEPtCr31C40\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 74.8px;\"\u003e\n\u003ctd style=\"width: 29.6656%; height: 74.8px;\"\u003e\u003cem\u003ePlatinum-Chromium Content\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 74.8px;\"\u003e\n\u003cp\u003e20 wt% Pt-Cr (3:1 ratio) (18.4 wt% Pt, 1.6 wt% Cr), 80 wt% carbon black\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 74.8px;\"\u003e\n\u003cp\u003e40 wt% Pt-Cr (3:1 ratio) (36.7 wt% Pt, 3.3 wt% Cr), 60 wt% carbon black\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 29.6656%; height: 35.6px;\"\u003e\u003cem\u003eMetal Surface Area\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e~90 m2\/g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e~75 m2\/g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 29.6656%; height: 35.6px;\"\u003e\u003cem\u003eCatalyst BET Surface Area:\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e~200 m2\/g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e~150 m2\/g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 29.6656%; height: 35.6px;\"\u003e\u003cem\u003eMetal Crystallite Size\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e2-4 nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e3-5 nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 29.6656%; height: 39.2px;\"\u003e\u003cem\u003eCatalyst granule size D(100)\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 39.2px;\"\u003e\n\u003cp\u003e\u003cspan\u003e≤ 75 µm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 39.2px;\"\u003e\n\u003cp\u003e\u003cspan\u003e≤ 75 µm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 15.6125px;\"\u003e\n\u003ctd style=\"width: 29.6656%; height: 15.6125px;\"\u003e\u003cem\u003eImpurities \u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 15.6125px;\"\u003e\n\u003cp\u003e\u003cspan\u003e≤ 500 ppm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 15.6125px;\"\u003e\n\u003cp\u003e\u003cspan\u003e≤ 500 ppm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.1875px;\"\u003e\n\u003ctd style=\"width: 29.6656%; height: 26.1875px;\"\u003e\u003cem\u003ePackage Size\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 26.1875px;\"\u003e0.5 g\/bottle\u003c\/td\u003e\n\u003ctd style=\"width: 34.8795%; height: 26.1875px;\"\u003e0.5 g\/bottle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e: Please try to store the Pt-Cr\/C powder in a dry place.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eReferences\u003c\/strong\u003e: \u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\u003cspan\u003e\u003ca href=\"https:\/\/pubs.acs.org\/doi\/abs\/10.1021\/jp030948q\"\u003eH. Yang, et al. Tailoring, Structure, and Activity of Carbon-Supported Nanosized Pt−Cr Alloy Electrocatalysts for Oxygen Reduction in Pure and Methanol-Containing Electrolytes, J. Phys. Chem. B 2004, 108, 6, 1938–1947\u003c\/a\u003e.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003ca href=\"https:\/\/iopscience.iop.org\/article\/10.1149\/1.1862258\/meta\"\u003eH. Yang, et al. High Methanol Tolerance of Carbon-Supported Pt-Cr Alloy Nanoparticle Electrocatalysts for Oxygen Reduction, J. Electrochem. Soc., 2005,152 A704\u003c\/a\u003e. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Premetek","offers":[{"title":"20 wt% Pt-Cr (3:1 ratio) on Vulcan XC-72","offer_id":47350593290470,"sku":"CEFCEPtCr31C20","price":249.0,"currency_code":"USD","in_stock":true},{"title":"40 wt% Pt-Cr (3:1 ratio) on Vulcan XC-72","offer_id":47350593323238,"sku":"CEFCEPtCr31C40","price":279.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CEFCEPtCrC_main_renew.png?v=1772301904","url":"https:\/\/echemsupplies.com\/products\/cefceptcrc","provider":"EChem Supplies","version":"1.0","type":"link"}