Hydrogen evolution on diamond electrodes and its dependence on surface C-H bond strengths

被引：11

作者：

Cai, Y ^{[1
]}

Anderson, AB

Angus, JC

Kostadinov, LN

机构：

[1] Case Western Reserve Univ, Dept Chem, Cleveland, OH 44106 USA

[2] Case Western Reserve Univ, Dept Chem Engn, Cleveland, OH 44106 USA

[3] Bulgarian Acad Sci, Dept Phys Chem, BU-1113 Sofia, Bulgaria

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2005年 / 8卷 / 09期

关键词：

D O I：

10.1149/1.1999913

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this quantum chemical study it is shown that a hydrogen atom chemisorbs weakly to a surface carbon atom on hydrogen-terminated diamond (111) if there is a bond-inserted hydrogen atom, or a substitutional B atom, in the near-subsurface region. It is found that reductive hydronium ion discharge in the Volmer-Heyrovsky mechanism to form H-2 is activated over these adsorbed H atoms compared to the strongly bonded H that terminates the surface. Activation energies for H-2 generation are calculated for these systems as functions of electrode potential between 0 and -3.2 V, using constrained variation theory. (c) 2005 The Electrochemical Society.

引用

页码：E62 / E65

页数：4

共 19 条

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