Durability of Pt Catalysts Supported on Graphitized Carbon-Black during Gas-Exchange Start-Up Operation Similar to That Used for Fuel Cell Vehicles

W2340113415 · 수집 2026-10-04 18:12:25

T10030 Electrocatalysts for Energy Conversion

CoT 라벨링

라벨링 전

PDF 파일

저장된 PDF 없음

기본 정보

DOI 제목 발행년도 저널 URL 페이지 열기 PDF URL PDF 열기 발행기관 피인용수 라이선스

추가 정보 초록

We investigated the durability of cathode catalysts during a start-up (SU) process similar to that used in actual polymer electrolyte fuel cell vehicle operation. The durability of Pt supported on graphitized carbon black (Pt/GCB) catalysts was evaluated in the practical SU process, i.e., the anode gas was successively cycled between air, hydrogen, and nitrogen. The effect of the SU process on the cell performance was evaluated using two types of catalysts (commercial Pt/GCB, and that prepared in house by the "nanocapsule-method," n-Pt/GCB). The polarization curves and cyclic voltammetry were evaluated before and after the SU evaluation. The degradation of Pt nanoparticles and carbon supports was analyzed by transmission electron microscopy, scanning transmission electron microscopy, and micro-Raman spectroscopy. We also applied glancing incidence X-ray diffraction in order to observe the depth profiles of the Pt crystallite sizes in various interfacial regions. From these analyses, we found that the degradation of the Pt catalyst occurred not only in the gas outlet region but also the gas inlet region of the cathode. The degradation in the inlet region is ascribed to both the interim electrochemical evaluations and the potential fluctuations, which cause a dissolution of Pt nanoparticles used during the SU process.

본문

PDF 본문 자동 추출 실패: [download] not a PDF (Content-Type: text/html, final URL: https://validate.perfdrive.com/fb803c746e9148689b3984a31fccd902/?ssa=025ca6a8-6e30-4f30-a8ad-c11d8ab39f2a&ssb=72418250291&ssc=https%3A%2F%2Fiopscience.iop.org%2Farticle%2F10.1149%2F2.0771607jes%2Fpdf&ssi=e97582e7-cnvj-4beb-98fc-907e7af010f5&ssk=botmanager_support@radware.com&ssm=0490493176923293610155426222940399&ssn=8e32ea5600fbd39614fc5798e343fbb887710365ea35-1dfa-4a77-9b2fd6&sso=ba9d8f5b-51d081f0c92958a2a836624c0b5aee70ca772d8c3ae3c730&ssp=28244299361791122779179117117140563&ssq=83886723419385721965410984979870169380402&ssr=MjExLjE4OC41NS4xMTY=&sst=Mozilla/5.0%20(X11;%20Linux%20x86_64)%20AppleWebKit/537.36%20(KHTML,%20like%20Gecko)%20Chrome/126.0%20Safari/537.36%20ai4s-collector/1.0&ssu=&ssv=&ssw=&ssx=eyJfX3V6bWYiOiI3ZjkwMDAwMzY1ZWEzNS0xZGZhLTRhNzctOWY1Yi01MWQwODFmMGM5MjkxLTE3OTExMTA5ODQ3MjAyMzIwODk4MC0wMDU2M2Q2NjZmODQ5NDgzZDMzMTAxNSIsInJkIjoiaW9wLm9yZyIsInV6bXgiOiI3ZmMwMDA4OTRmNTU4ZC1lNDlkLTQwZjgtYjI1Yi0xN2RkNzk3MjJmNzAxLTE3 (2026-10-05 02:16:34)

활용가능성

이력 0건

아직 편집 이력이 없습니다. 저장할 때마다 이전 내용이 여기에 백업됩니다.