The HCOOH electrooxidation reaction (FAO) was experimentally studied on rhodium electrode using a flow cell in a 0.5-M HCOOH + 0.5-M H₂SO₄ solution. It was obtained the steady-state current-potential curve by chronoamperometry, which demonstrated that the FAO is verified in the potential region 0.45 < E/V < 0.70. The amount of adsorbed CO on the electrode surface as a function of potential was quantified by stripping voltammetry after changing to a 0.50-M H₂SO₄ solution at closed electric circuit. It was established that the spontaneous dissociative adsorption of HCOOH on rhodium produces irreversibly adsorbed CO only for potential values E ≤ 0.40 V, and therefore, the FAO takes place in the absence of CO_ad. These results can explain the current-potential profiles obtained when the FAO is studied by cyclic voltammetry at different values of the potential scan limits, where the behaviour is strongly influenced by the inhibition of reaction sites due to the adsorbed CO. A kinetic mechanism for the FAO on rhodium is proposed on the basis of the results obtained, which are also in agreement with recently published spectroscopic measurements.

The kinetics of the formic acid electrooxidation reaction (FAO) on rhodium electrode on steady state was studied. It was demonstrated that adsorbed CO is not a reaction intermediate, being only an inhibitor. A kinetic mechanism compatible with experimental as well as previous spectroscopic evidences was proposed.

使用流动池在0.5-M HCOOH + 0.5-MH ₂ SO ₄溶液中在铑电极上对HCOOH电氧化反应（FAO）进行了实验研究。通过计时电流法获得了稳态电流-电位曲线，这表明在电位区域0.45 <E / V <0.70中验证了FAO。在闭合电路上变为0.50-MH ₂ SO ₄溶液后，通过溶出伏安法定量测定电极表面上吸附的CO量随电位的变化。可以确定的是，仅当电位值E≤0.40 V时，HCOOH在铑上的自发离解吸附会产生不可逆地吸附的CO，因此，FAO在不存在CO _ad的情况下进行。这些结果可以解释当通过循环伏安法在不同的电位扫描极限值下研究FAO时获得的电流-电位分布图，其中行为受吸附CO的反应位点抑制的影响很大。根据获得的结果提出了粮农组织关于铑的建议，该结果也与最近发表的光谱测量结果一致。

研究了稳态条件下铑电极上甲酸电氧化反应的动力学。已经证明吸附的CO不是反应中间体，仅是抑制剂。提出了一种与实验以及以前的光谱证据兼容的动力学机理。