TY - JOUR
T1 - Enhancing the hydrogen evolution reaction performance of solution-corroded NiMo via plasma modification
AU - Soo, Joshua Zheyan
AU - Riaz, Asim
AU - Zhang, Doudou
AU - Jagadish, Chennupati
AU - Tan, Hark Hoe
AU - Karuturi, Siva
PY - 2024/5/14
Y1 - 2024/5/14
N2 - In pursuit of efficient water-splitting technologies, the development of high-performing electrocatalysts is crucial, particularly for the hydrogen evolution reaction (HER). In addition, it is paramount to adopt cost-effective approaches that leverage earth-abundant metals, together with scalable synthesis methods. In this study, we introduce a synthesis approach that combines a facile solution corrosion technique with plasma modification, thereby enhancing the hydrogen evolution activity of NiMo alloys. The inclusion of NH3 plasma modification plays a dual role by concurrently reducing and nitriding as-synthesized NiMo hydroxide. The treatment results in a significant reduction in the HER overpotential to 95 mV at 10 mA/cm2 compared to its initial overpotential. This improvement is attributed to enhanced kinetics due to substantial reductions in charge transfer resistance and an increased double-layer capacitance. Furthermore, the catalyst demonstrates excellent stability of close to 120 h, thereby highlighting the potential of this synthesis method for large-area synthesis of HER electrocatalysts.[Graphic presents]
AB - In pursuit of efficient water-splitting technologies, the development of high-performing electrocatalysts is crucial, particularly for the hydrogen evolution reaction (HER). In addition, it is paramount to adopt cost-effective approaches that leverage earth-abundant metals, together with scalable synthesis methods. In this study, we introduce a synthesis approach that combines a facile solution corrosion technique with plasma modification, thereby enhancing the hydrogen evolution activity of NiMo alloys. The inclusion of NH3 plasma modification plays a dual role by concurrently reducing and nitriding as-synthesized NiMo hydroxide. The treatment results in a significant reduction in the HER overpotential to 95 mV at 10 mA/cm2 compared to its initial overpotential. This improvement is attributed to enhanced kinetics due to substantial reductions in charge transfer resistance and an increased double-layer capacitance. Furthermore, the catalyst demonstrates excellent stability of close to 120 h, thereby highlighting the potential of this synthesis method for large-area synthesis of HER electrocatalysts.[Graphic presents]
UR - http://www.scopus.com/inward/record.url?scp=85190737681&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.3c02978
DO - 10.1021/acs.chemmater.3c02978
M3 - Article
AN - SCOPUS:85190737681
SN - 0897-4756
VL - 36
SP - 4164
EP - 4173
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 9
ER -