عنوان

Steady state experimental evaluation of a novel Raney-nickel/PTFE gas diffusion electrode in an alkaline fuel cell

شماره

TLpq230726771

زبان متن نوشتاري يا گفتاري و مانند آن

انگلیسی

عنوان اصلي

Steady state experimental evaluation of a novel Raney-nickel/PTFE gas diffusion electrode in an alkaline fuel cell

نام عام مواد

[Thesis]

نام نخستين پديدآور

K. A. A. Khan

نام ناشر، پخش کننده و غيره

King Fahd University of Petroleum and Minerals (Saudi Arabia)

تاریخ نشرو بخش و غیره

1993

نام خاص و کميت اثر

140

جزئيات پايان نامه و نوع درجه آن

M.S.

کسي که مدرک را اعطا کرده

King Fahd University of Petroleum and Minerals (Saudi Arabia)

امتياز متن

1993

متن يادداشت

Steady state polarization measurements on specially prepared Raney-Ni/PTFE gas diffusion electrode impregnated with copper oxide were carried out. Pure hydrogen gas was fed to the half cell at a pressure of 1.4 bar. The electrolyte temperature was varied from 25C to 75C. The better performance (less polarization) at higher current densities is attributed to the addition of copper to the electrode. The spherical Raney-catalyst grain model was applied to determine the kinetic parameters, exchange current density (io) and charge transfer coefficient(usd\alphausd) for the electrode. Exchange current density followed an exponential relation with temperature. Apparent activation energy for the electrode was found to be 28 kJ/mol lower than that reported in the literature. Long term performance tests showed that electrode overpotential greater than 50 mV cause rapid deactivation of the electrode. The apparent deactivation constants estimated for the electrode varied from 0.004 hr to 0.032 hr. The rate of deactivation is more at higher temperatures. (Abstract shortened by UMI.)

موضوع مستند نشده

Applied sciences

موضوع مستند نشده

Chemical engineering

مستند نام اشخاص تاييد نشده

K. A. A. Khan

نام الکترونيکي

فرمت انتشار

p

نوع ماده

[Thesis]

کد کاربرگه

276903

سطح دسترسي

a

تكميل شده

Y