| 학회 | 한국공업화학회 |
| 학술대회 | 2018년 봄 (05/02 ~ 05/04, 대구 엑스코(EXCO)) |
| 권호 | 22권 1호 |
| 발표분야 | (촉매) 수전해/평형수 처리를 위한 촉매 기술 |
| 제목 | 활성, 내구성, 전도성 측면에서 최적의 밸런스를 갖춘 이리듐 기반 나노포러스 코어쉘 OER 촉매 |
| 초록 | The selection of oxide materials for catalyzing the oxygen evolution reaction in acid-based electrolyzers for the future energy mass storage must be guided by the proper balance between activity, stability and conductivity—a challenging mission of great importance for delivering affordable and environmentally friendly hydrogen. Here we report that the highly conductive nanoporous architecture of an iridium oxide shell on a metallic iridium core, formed through the fast dealloying of osmium from an Ir25Os75 alloy, exhibits an exceptional balance between oxygen evolution activity and stability as quantified by the activity-stability factor. On the basis of this metric, the nanoporous Ir/IrO2 morphology of dealloyed Ir25Os75 shows a factor of ~30 improvement in activity-stability factor relative to conventional iridium-based oxide materials, and an ~8 times improvement over dealloyed Ir25Os75 nanoparticles due to optimized stability and conductivity, respectively. |
| 저자 | 김용태 |
| 소속 | 부산대 |
| 키워드 | OER; electrocatalysts; iridium; core-shell; ASF(activity stability factor) |
