Electrocatalytic and corrosion behaviour of tungsten carbide in near-neutral pH electrolytes
Electrocatalytic and corrosion behaviour of tungsten carbide in near-neutral pH electrolytes
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DOI：
10.1016/j.apcatb.2008.08.016
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发表时间：
2009-03
影响因子：
22.1
通讯作者：
F. Harnisch;U. Schröder;Marion Quaas;F. Scholz
中科院分区：
文献类型：
--
作者：
F. Harnisch;U. Schröder;Marion Quaas;F. Scholz
本文研究了碳化钨在室温和近中性pH条件下的电化学和电催化行为。氢，甲酸盐和乳酸盐的电催化氧化作为催化剂材料的组合物的函数，和所使用的电解质溶液的组合物和pH值的研究。它表明，对于氢的氧化，不同的表面和体积性质是决定性的比甲酸盐和乳酸盐的氧化。碳化钨的一个主要问题是它在水溶液中的稳定性，pH中性环境，其中发生明显的腐蚀过程。各个腐蚀速率强烈地取决于电解质成分和pH值，以及还原剂的存在。
This paper examines the electrochemical and electrocatalytic behaviour of tungsten carbide at ambient temperature and at near to neutral pH conditions. The electrocatalytic oxidation of hydrogen, formate and lactate is investigated as a function of the composition of the catalyst material, and of the composition and pH of the used electrolyte solutions. It is demonstrated that for the oxidation of hydrogen, different surface and bulk properties are decisive than for the oxidation of formate and lactate. A major problem of tungsten carbide is its stability in aqueous, pH neutral environments, in which noticeable corrosion processes take place. The individual corrosion rates strongly depend on the electrolyte composition and pH, and on the presence of reducing agents.