Affiliation:
1. Department of Inorganic and Analytical Chemistry Faculty of Chemistry University of Lodz Tamka 12 91–403 Lodz Poland
2. Department of Chemistry Government College Peshawar Khyber 25000 Pakhtunkhwa Pakistan
3. Energy Research & Innovation Center (ERIC) King Fahd University of Petroleum & Minerals (KFUPM) Dhahran 31261 Saudi Arabia
4. Mechanical Engineering Department King Fahd University of Petroleum & Minerals (KFUPM) Dhahran 31261 Saudi Arabia
5. School of Materials Science and Engineering Jiangsu University Zhenjiang 212013 China
6. Chemistry Department Faculty of Science King Khalid University P.O. Box 9004 Abha 61413 Saudi Arabia
Abstract
Methanol oxidation stands out as a pivotal solution in addressing the global energy crisis and environmental pollution, owing to its practical applicability, high current density, and the ready availability of methanol as a fuel source. To effectively catalyze methanol oxidation, an electrocatalyst is imperious to overcome the activation energy barrier. Herein, a three‐dimensionally arranged NiSe2 nanosheet‐based electrocatalyst is synthesized through a facile solvothermal followed by an annealing method. The catalyst's porous structure enhances catalytic efficiency by providing a substantial electrochemical surface area (ECSA) equivalent to 0.121 mF cm−2. Notably, the electrocatalyst exhibits a remarkable response of 21.58 mA cm−2 at an overpotential of 1.70 V vs RHE, accompanied by the lowest Tafel slope recorded at 39.14 mV dec−1. The electronic circuit, represented by Rs(Qf(RfW(QdlRct)), aligns well with electrochemical impedance spectroscopy data, elucidating the reaction path and intrinsic properties. Furthermore, the catalytic performance is elucidated concerning ECSA and weight, revealing current densities of 5.60 mA cm−2 and 71.34 mA mg−1, respectively. Impressively, the catalyst demonstrates exceptional resistance to poisoning and sustained stability over a continuous 3600‐s operation. This comprehensive study underscores the promising potential of the NiSe2 nanosheet‐based electrocatalyst for efficient methanol oxidation, providing valuable insights for advancing clean energy technologies.
Funder
Deanship of Scientific Research, King Khalid University