학회 | 한국화학공학회 |
학술대회 | 2008년 봄 (04/23 ~ 04/25, 제주ICC) |
권호 | 14권 1호, p.786 |
발표분야 | 에너지/환경 |
제목 | Ultra-low Pt content anode catalyst prepared by electrochemical processes for a DFAFC |
초록 | The electrodeposition of platinum (Pt) catalyst directly on the electrochemically pretreated carbon paper substrate as catalyst support was conducted to not only improve catalyst utilization but also secure electronic percolation network toward formic acid fuel cell application. The nanostructured Pt catalysts were obtained by potentiostatic or galvanostatic deposition and characterized by SEM, XRD, XPS and EDX analysis. Good selection of adequate carbon paper as catalyst support was prerequisite to form more favorable catalyst layer of membrane electrode assembly (MEA). Furthermore, for more enhanced catalytic activity of formic acid electro-oxidation, Bi adatom was under-potential deposited on as-prepared Pt electrode with ca. 30% surface coverage. Polarization measurement with PtBiupd catalyst of 0.5 mg/cm2 shows superior power performance and stability to commercially available PtRu or Pt black catalyst with higher metal loading (i.e., at least 3 mg/cm2) over entire current range in addition to enhanced open circuit potential. "This work was supported by the Korea Science and Engineering Foundation(KOSEF) grant funded by the Korea government(MOST) (R01-2007-000-20290-0)". |
저자 | 엄성현1, 권영국2, 정성택1, 이재영2 |
소속 | 1인하대, 2광주과학기술원 |
키워드 | electrodeposition; Pt; Bi; formic acid; fuel cell |
원문파일 | 초록 보기 |