Устөрөгч ялгарах процесст ашиглах никель суурьт катализаторын судалгаа
DOI:
https://doi.org/10.22353/physics.v40i646.11013Keywords:
Никель-Зэс, Никель-фосфор, каталитик шинж чанарAbstract
Энэхүү судалгааны ажилд устөрөгч ялгарах процессын (HER) катализатораар ашиглах никель (Ni), никель-зэс (Ni-Cu), никель-фосфор (Ni-P) хайлшуудыг химийн тунадасжих аргаар гарган авч бүтэц, морфологи, гадаргуугийн шинж чанарыг рентген дифрактометр (XRD), сканнинг электрон микроскоп (SEM), хувийн гадаргуугийн талбайн анализатор (BET), каталитик шинж чанарыг циклик вольтамперметр (CV), шугаман алхамт вольтамперметр (LSV), цахилгаан химийн импеданс (EIS) аргуудаар тус тус тодорхойлов. Ni, Ni–Cu, Ni–P хайлшуудын цахилгаан химийн идэвхт гадаргуугийн талбайг (ECSA) тооцоолоход тус бүр 18, 201, 38 см2 байсан нь Cu болон P – оор хольцлоход цахилгаан химийн идэвхт төвийн тоо нэмэгдсэнийг харуулж байна. Мөн LSV болон EIS хэмжилтээр хэт потенциал (250-аас 124 мВ), Тафелийн налалт (150-аас 118 мВ дец -1), цэнэг шилжилтийн эсэргүүцэл (55.3 – аас 2.0 Ом) буурсан нь хольцын нөлөөгөөр HER урвалын каталитик идэвх сайжирсан болохыг харуулж байна.
[English]
In this study, nickel (Ni), nickel–copper (Ni–Cu), and nickel–phosphorus (Ni–P) alloys were prepared via chemical deposition as catalysts for the hydrogen evolution reaction (HER). Their structure, morphology, and surface properties were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller (BET) surface area analysis, while their catalytic performance was evaluated by cyclic voltammetry (CV), linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS), respectively. The electrochemically active surface areas (ECSA) of Ni, Ni–Cu, and Ni–P alloys were calculated to be 18, 201, and 38 cm², respectively, indicating an increase in the number of electrochemically active sites. Electrochemical measurements further demonstrated a significant improvement in catalytic performance, as evidenced by decreases in overpotential (from 250 to 124 mV), Tafel slope (from 150 to 118 mV dec⁻¹), and charge-transfer resistance (from 55.3 to 2.01 Ohm). These results confirm that elemental incorporation effectively enhances the catalytic activity of Nickel electrocatalysts for the hydrogen evolution reaction.
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