CAJ | 학술논문

通过测试线性扫描伏安曲线研究了M_mNi_(3.2)Al_(0.2)Mn_(0.6) Co_(1.0)(Mm为混合稀土)经KOH处理和MnO_2掺杂对催化NaBH_4电氧化性能的影响. 发现NaBH_4在经KOH处理后的合金上峰电流达到50 mA/cm~2. 若再进行MnO_2掺杂, 其电催化活性会进一步提高, 当掺杂MnO_2的质量分数为10%时, M_mNi_(3.2)Al_(0.2)Mn_(0.6)Co_(1.0)对NaBH_4电氧化的峰电位和峰电流密度分别为-0.45 V和126 mA/cm~2, 峰电流密度为只经过KOH处理的合金的2.5倍, 是未经过任何处理的合金的9倍.
통과측시선성소묘복안곡선연구료M_mNi_(3.2)Al_(0.2)Mn_(0.6) Co_(1.0)(Mm위혼합희토)경KOH처리화MnO_2참잡대최화NaBH_4전양화성능적영향. 발현NaBH_4재경KOH처리후적합금상봉전류체도50 mA/cm~2. 약재진행MnO_2참잡, 기전최화활성회진일보제고, 당참잡MnO_2적질량분수위10%시, M_mNi_(3.2)Al_(0.2)Mn_(0.6)Co_(1.0)대NaBH_4전양화적봉전위화봉전류밀도분별위-0.45 V화126 mA/cm~2, 봉전류밀도위지경과KOH처리적합금적2.5배, 시미경과임하처리적합금적9배.
The effect of KOH treatment and MnO_2 adulteration of the M_mNi_(3.2)Al_(0.2) Mn_(0.6)Co_(1.0)(Mm is misch metal) on the electrocatalytic activity for borohydride oxidation was investigated by the linear sweeping voltammograms test. It was found that the peak potential and current density of the NaBH_4 oxidation at the M_mNi_(3.2)Al_(0.2)Mn_(0.6)Co_(1.0) catalyst without any treatments are -0.65 V and 14 mA/cm~2, respectively. After KOH treatment, the peak potential remains the same, but the peak current density reached 50 mA/cm~2, which is 3.6 times of that at the un-treated M_mNi_(3.2)Al_(0.2)Mn_(0.6)Co_(1.0). KOH treatment followed by the MnO_2 adulteration further increased the electrocatalytic activity of the M_mNi_(3.2)Al_(0.2)Mn_(0.6)Co_(1.0). When the mass fraction of MnO_2 to M_mNi_(3.2)Al_(0.2)Mn_(0.6)Co_(1.0) is 10%, the peak potential and current density are -0.45 V and 126 mA/cm~2, respectively. The peak current density is 2.5 and 9 times of that at the M_mNi_(3.2)Al_(0.2)Mn_(0.6)Co_(1.0) with and without KOH treatment, respectively.