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### AuthorTopic: Finding an Open Circuit Potential of a Hydrogen Pump Problem  (Read 138 times) !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="https://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); (function() {var po = document.createElement("script"); po.type = "text/javascript"; po.async = true;po.src = "https://apis.google.com/js/plusone.js";var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(po, s);})();

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#### JamminMic

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##### Finding an Open Circuit Potential of a Hydrogen Pump Problem
« on: February 10, 2019, 06:34:55 AM »

My problem is:

"In an electrochemical H2-pump using a proton conductive membrane (pH ≈ 0), H2 can be compressed from low to high pressure. Assume an exchange current density of the HOR/HER on Pt of i0 = 100 mA cm-2 Pt with αa = αc (charge transfer coefficient) = 0.5, a H2-partial pressure of 100 kPa on the low and 1000 kPa on the high pressure side. The system is operated at 80 °C and the roughness factor of the electrodes is 100 cm2Pt cm-2. The HFR (High Frequency Resistance) was determined to be 50 mΩ cm2."

"What is the thermodynamic open circuit potential between the two electrodes?"

I have tried using Butler-Volmer or a Tafel Slope equation in order to find the Overpotential but I'm not really getting anywhere. I'm also guessing that Nernst may be involved. Any suggestions?
« Last Edit: February 10, 2019, 09:49:15 AM by JamminMic »
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