The Borohydride Oxidation Reaction (BOR), the anode reaction in a Direct borohydride fuel cell (DBFC), is complex and still poorly understood, which impedes the development and deployment of the DBFC technology. In particular, no practical electrocatalyst is capable to prevent gaseous hydrogen generation and escape from its anode upon operation, which lowers the fuel-efficiency of the DBFC and raises safety issues in operation. The nature of the anode electrocatalysts strongly influences the hydrogen escape characteristics of the DBFC, which demonstrates how important it is to isolate the BOR mechanism in conditions relevant to DBFC operation. In this paper, from a selected literature review and BOR experiments performed in differential electrochemical mass spectrometry (DEMS) in a wide range of NaBH₄ concentration (5–500 mM), a microkinetic model of the BOR for both Pt and Au surfaces is proposed; this model takes into account the hydrogen generation and escape.

硼氢化物氧化反应（BOR）是直接硼氢化物燃料电池（DBFC）中的阳极反应，它很复杂，但仍知之甚少，这阻碍了DBFC技术的发展和应用。特别地，没有实际的电催化剂能够防止气态氢的产生并在操作时从其阳极逸出，这降低了DBFC的燃料效率并增加了操作中的安全性问题。阳极电催化剂的性质极大地影响了DBFC的氢逸出特性，这表明在与DBFC操作有关的条件下隔离BOR机理是多么重要。本文从精选的文献综述和在广泛的NaBH ₄中的差示电化学质谱（DEMS）中进行的BOR实验中获得了成功浓度（5-500 mM），提出了铂和金表面的BOR的微动力学模型；该模型考虑了氢气的产生和逸出。