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Citation: Ma Chun-An, Yang Zu-Wang, Zhou Yun-Hong, Zha Quan-Xing. Research on the Waterproof Gas-Diffusion Electrode of Tungsten Carbide[J]. Acta Physico-Chimica Sinica, ;1990, 6(05): 622-628. doi: 10.3866/PKU.WHXB19900521 shu

Research on the Waterproof Gas-Diffusion Electrode of Tungsten Carbide

1.
Department of Chemical Engineering, Zhejiang Institute of Technology, Hangzhou; Department of Chemistry, Wuhan University, Wuhan

Received Date: 15 May 1989
Available Online: 15 October 1990

A gas-diffusion electrode of WC was made by active WC powder, PTFE with some additives. The influences of the electro-catalytic activity of Tungsten Carbide (WC) powder and the preparation of the electrode on its activity have been investigated. The results show that the activity of the waterproof gas-diffusion electrode of WC is directly related to the composition, the specific surface area of WC powder, the loading capacity of WC powder and PTFE content in the electrode. At η=250 mV, the appa-rent activation energies (kJ·mol~(-1).) of hydrogen ionisation reaction (HIR) for the electrode are 23.3 in 3.5 mol·L~(-1) HCl, 14.5 in 2.0 mol·L~(-1) H_2SO_4 and 13.7 in 85% H_3PO_4 respectively. When the electrode is polarized to 250 mV (vs. DHE) in 2.0 mol·L~(-1) H_2SO_4 at 60 ℃, the current dentity of HIR is 3020 mA·g~(-1) and the electrode has the highest activity.
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