Knowledge (XXG)

Faraday efficiency

Source πŸ“

631: 223:, the difference between the theoretical and actual electrode voltages needed to drive the reaction at the desired rate. Even a rechargeable battery with 100% faradaic efficiency requires charging at a higher voltage than it produces during discharge, so its overall 606: 211:
converted to product, as measured by the current passed. This result is then compared to the observed quantity of product measured through another analytical method.
312:
Jones, J. E.; et al. (1995). "Faradaic efficiencies less than 100% during electrolysis of water can account for reports of excess heat in 'cold fusion' cells".
601: 402: 371: 434: 548: 228: 177: 257: 136:
Even when the proper electrolysis products are produced, losses can still occur if the products are permitted to recombine. During
487: 99: 611: 554: 512: 118:
cells when electrons or ions participate in unwanted side reactions. These losses appear as heat and/or chemical byproducts.
581: 457: 427: 314: 224: 207:
Faradaic efficiency of a cell design is usually measured through bulk electrolysis where a known quantity of reagent is
133:
can also be produced. The fraction of electrons so diverted represent a faradaic loss and vary in different apparatus.
655: 616: 502: 167: 634: 571: 420: 378: 275:"Recent Advances in Electrochemical Water Oxidation to Produce Hydrogen Peroxide: A Mechanistic Perspective" 227:
is the product of voltage efficiency and faradaic efficiency. Voltage efficiencies below 100% reflect the
189: 122: 79: 273:
Mavrikis, Sotirios; Perry, Samuel C.; Leung, Pui Ki; Wang, Ling; Ponce de LeΓ³n, Carlos (2021-01-11).
180:
provide another example of faradaic losses when some of the electrons separated from hydrogen at the
527: 91: 192:. Ideally, the electrolyte membrane would be a perfect insulator and prevent this from happening. 294: 137: 596: 396: 253: 130: 66:. The word "Faraday" in this term has two interrelated aspects: first, the historic unit for 586: 576: 522: 472: 353: 322: 286: 71: 67: 31: 497: 492: 443: 95: 55: 340:
Shkedi, Z.; et al. (1995). "Calorimetry, Excess Heat, and Faraday Efficiency in Ni-H
591: 462: 219:
Faradaic loss is only one form of energy loss in an electrochemical system. Another is
208: 196: 649: 532: 298: 220: 115: 17: 507: 467: 111: 290: 158:. This could realistically happen in the presence of catalytic materials such as 170:
has been identified as the cause of the misidentification of positive results in
482: 274: 171: 87: 163: 357: 159: 141: 59: 326: 185: 75: 148: 126: 188:
directly instead of passing through the load and performing useful
477: 412: 181: 155: 63: 416: 27:
Efficiency of charge transfer in an electrochemical reaction
166:
commonly used as electrodes. Failure to account for this
195:
An especially familiar example of faradaic loss is the
250:
Electrochemical Methods: Fundamentals and Applications
94:). This phenomenon was originally understood through 607:
Institute of Physics Michael Faraday Medal and Prize
564: 541: 450: 252:(2nd ed.). New York: John Wiley & Sons. 215:Faradaic loss vs. voltage and energy efficiency 602:Royal Society of London Michael Faraday Prize 428: 62:) is transferred in a system facilitating an 8: 279:ACS Sustainable Chemistry & Engineering 129:at the positive electrode in electrolysis. 435: 421: 413: 184:leak through the membrane and reach the 110:Faradaic losses are experienced by both 74:(F), but has since been replaced by the 240: 231:of every real-world chemical reaction. 401:: CS1 maint: archived copy as title ( 394: 54:) describes the efficiency with which 248:Bard, A. J.; Faulkner, L. R. (2000). 7: 549:Royal Institution Christmas Lectures 178:Proton exchange membrane fuel cells 203:Methods of measuring faradaic loss 25: 630: 629: 612:Faraday Medal (electrochemistry) 555:The Chemical History of a Candle 199:that limits battery shelf-life. 121:An example can be found in the 78:(C); and secondly, the related 488:Faraday's laws of electrolysis 1: 582:Faraday Building (Manchester) 513:Faraday's ice pail experiment 291:10.1021/acssuschemeng.0c07263 229:thermodynamic irreversibility 98:'s work and expressed in his 154:), could recombine to form 672: 458:Faraday's law of induction 625: 617:Faraday Lectureship Prize 503:Faraday-efficiency effect 168:Faraday-efficiency effect 90:of matter and electrons ( 86:) correlates charge with 635:Category:Michael Faraday 572:Michael Faraday Memorial 140:, the desired products ( 106:Sources of faradaic loss 64:electrochemical reaction 344:O Electrolytic Cells". 358:10.13182/FST95-A30436 100:laws of electrolysis 48:coulombic efficiency 18:Coulombic efficiency 327:10.1021/j100018a033 92:amount of substance 40:faradaic efficiency 518:Faraday efficiency 209:stoichiometrically 138:water electrolysis 123:oxidation of water 80:Faraday's constant 52:current efficiency 36:Faraday efficiency 643: 642: 597:IET Faraday Medal 346:Fusion Technology 321:(18): 6973–6979. 225:energy efficiency 131:Hydrogen peroxide 16:(Redirected from 663: 656:Electrochemistry 633: 632: 587:Faraday (crater) 577:Faraday Building 523:Electrochemistry 473:Faraday constant 437: 430: 423: 414: 407: 406: 400: 392: 390: 389: 383: 377:. Archived from 376: 368: 362: 361: 352:(4): 1720–1731. 337: 331: 330: 309: 303: 302: 270: 264: 263: 245: 85: 32:electrochemistry 21: 671: 670: 666: 665: 664: 662: 661: 660: 646: 645: 644: 639: 621: 560: 537: 498:Faraday rotator 493:Faraday paradox 446: 444:Michael Faraday 441: 411: 410: 393: 387: 385: 381: 374: 372:"Archived copy" 370: 369: 365: 343: 339: 338: 334: 311: 310: 306: 272: 271: 267: 260: 247: 246: 242: 237: 217: 205: 152: 145: 108: 96:Michael Faraday 83: 28: 23: 22: 15: 12: 11: 5: 669: 667: 659: 658: 648: 647: 641: 640: 638: 637: 626: 623: 622: 620: 619: 614: 609: 604: 599: 594: 592:Faraday Future 589: 584: 579: 574: 568: 566: 562: 561: 559: 558: 551: 545: 543: 539: 538: 536: 535: 530: 525: 520: 515: 510: 505: 500: 495: 490: 485: 480: 475: 470: 465: 463:Faraday effect 460: 454: 452: 448: 447: 442: 440: 439: 432: 425: 417: 409: 408: 363: 341: 332: 315:J. Phys. Chem. 304: 265: 258: 239: 238: 236: 233: 216: 213: 204: 201: 197:self-discharge 150: 143: 107: 104: 44:faradaic yield 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 668: 657: 654: 653: 651: 636: 628: 627: 624: 618: 615: 613: 610: 608: 605: 603: 600: 598: 595: 593: 590: 588: 585: 583: 580: 578: 575: 573: 570: 569: 567: 563: 557: 556: 552: 550: 547: 546: 544: 540: 534: 533:Line of force 531: 529: 526: 524: 521: 519: 516: 514: 511: 509: 506: 504: 501: 499: 496: 494: 491: 489: 486: 484: 481: 479: 476: 474: 471: 469: 466: 464: 461: 459: 456: 455: 453: 449: 445: 438: 433: 431: 426: 424: 419: 418: 415: 404: 398: 384:on 2008-09-21 380: 373: 367: 364: 359: 355: 351: 347: 336: 333: 328: 324: 320: 317: 316: 308: 305: 300: 296: 292: 288: 284: 280: 276: 269: 266: 261: 259:0-471-04372-9 255: 251: 244: 241: 234: 232: 230: 226: 222: 221:overpotential 214: 212: 210: 202: 200: 198: 193: 191: 187: 183: 179: 175: 174:experiments. 173: 169: 165: 161: 157: 153: 146: 139: 134: 132: 128: 124: 119: 117: 113: 105: 103: 101: 97: 93: 89: 81: 77: 73: 69: 65: 61: 57: 53: 49: 45: 41: 38:(also called 37: 33: 19: 553: 528:Faraday disc 517: 508:Faraday wave 468:Faraday cage 386:. Retrieved 379:the original 366: 349: 345: 335: 318: 313: 307: 285:(1): 76–91. 282: 278: 268: 249: 243: 218: 206: 194: 176: 135: 120: 112:electrolytic 109: 51: 47: 43: 39: 35: 29: 483:Faraday cup 172:cold fusion 388:2008-10-08 235:References 299:234271584 164:palladium 60:electrons 650:Category 542:Lectures 397:cite web 160:platinum 116:galvanic 565:Related 451:Physics 186:cathode 76:coulomb 72:faraday 70:is the 297:  256:  127:oxygen 68:charge 56:charge 478:Farad 382:(PDF) 375:(PDF) 295:S2CID 182:anode 156:water 88:moles 50:, or 403:link 254:ISBN 190:work 147:and 114:and 354:doi 323:doi 287:doi 162:or 125:to 30:In 652:: 399:}} 395:{{ 350:28 348:. 319:99 293:. 281:. 277:. 102:. 42:, 34:, 436:e 429:t 422:v 405:) 391:. 360:. 356:: 342:2 329:. 325:: 301:. 289:: 283:9 262:. 151:2 149:O 144:2 142:H 84:F 82:( 58:( 46:, 20:)

Index

Coulombic efficiency
electrochemistry
charge
electrons
electrochemical reaction
charge
faraday
coulomb
Faraday's constant
moles
amount of substance
Michael Faraday
laws of electrolysis
electrolytic
galvanic
oxidation of water
oxygen
Hydrogen peroxide
water electrolysis
H2
O2
water
platinum
palladium
Faraday-efficiency effect
cold fusion
Proton exchange membrane fuel cells
anode
cathode
work

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.

↑