Nickel–Cobalt Modified Boron-Doped Diamond as an Electrode for a Urea/H2O2Fuel Cell
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2021-11-19 |
| Journal | Bulletin of the Chemical Society of Japan |
| Authors | Yulia Mariana Tesa Ayudia Putri, Prastika Krisma Jiwanti, Irkham Irkham, Jarnuzi Gunlazuardi, Yasuaki Einaga |
| Institutions | Keio University, Airlangga University |
| Citations | 8 |
Abstract
Section titled “Abstract”A nickel-cobalt-modified boron-doped diamond (NiCo-BDD) electrode was prepared by chronoamperometry. A Ni/Co ratio of 4:1 in solution was determined as the optimum ratio for the urea oxidation reaction. Results showed that the Ni and Co particles were homogeneously deposited on the BDD surface and deposited without any interaction between the particles. The prepared NiCo-BDD electrode for a urea fuel cell exhibited optimum performance with a 0.1 M KOH and 0.50 M urea solution as the anode electrolyte and a 2.0 M H2O2 and 2.0 M H2SO4 solution as the cathode electrolyte. An open-circuit voltage of 0.817 V with a power density of approximately 0.632 mW cm−2 at room temperature and excellent stability after 6 h of application were achieved. NiCo-BDD significantly enhanced the catalytic activity of UOR compared with the Ni plate, unmodified BDD, Ni-BDD, and Co-BDD. NiCo-BDD electrodes were prepared using the chronoamperometric deposition technique. The application of NiCo-BDD in the urea fuel cell test showed the enhancement of power density compared to other electrodes in this work, indicating the contribution of Co and BDD to the catalytic activity of UOR. Excellent stability was observed, indicating the material is a promising catalyst for urea fuel cell.