The performance of an atomically dispersed oxygen reduction catalyst prepared by γ-CD-MOF integration with FePc.

Autor:	Xu D; Department of Chemistry, Capital Normal University Beijing 100048 China zuoxia@cnu.edu.cn +86-10-68903040 +86-10-68903086., Li X; Department of Chemistry, Capital Normal University Beijing 100048 China zuoxia@cnu.edu.cn +86-10-68903040 +86-10-68903086., Zheng T; Department of Chemistry, Capital Normal University Beijing 100048 China zuoxia@cnu.edu.cn +86-10-68903040 +86-10-68903086., Zhao R; Department of Chemistry, Capital Normal University Beijing 100048 China zuoxia@cnu.edu.cn +86-10-68903040 +86-10-68903086., Zhang P; Department of Chemistry, Capital Normal University Beijing 100048 China zuoxia@cnu.edu.cn +86-10-68903040 +86-10-68903086., Li K; Department of Chemistry, Capital Normal University Beijing 100048 China zuoxia@cnu.edu.cn +86-10-68903040 +86-10-68903086., Li Z; Department of Chemistry, Capital Normal University Beijing 100048 China zuoxia@cnu.edu.cn +86-10-68903040 +86-10-68903086., Zheng L; Department Beijing Synchrotron Radiation, Facility Institute of High Energy Physics China., Zuo X; Department of Chemistry, Capital Normal University Beijing 100048 China zuoxia@cnu.edu.cn +86-10-68903040 +86-10-68903086.
Jazyk:	angličtina
Zdroj:	Nanoscale advances [Nanoscale Adv] 2022 Apr 11; Vol. 4 (9), pp. 2171-2179. Date of Electronic Publication: 2022 Apr 11 (Print Publication: 2022).
DOI:	10.1039/d2na00095d
Abstrakt:	Here, a series of Fe/N/C catalysts with different proportions and pyrolysis temperatures are prepared by co-pyrolysis of melamine with a γ-cyclodextrin metal-organic framework (γ-CD-MOF) containing iron(ii) phthalocyanine (FePc). Due to the restriction effect of the host and guest at the molecular level, γ-CD-MOF can effectively avoid the π-π stacking of FePc and restrain the agglomeration of Fe atoms during pyrolysis. The phases and structures of the catalysts are characterized, which proves that the obtained catalyst has a three-dimensional porous and internal cavity structure with abundant surface area (1055.317 m 2 g -1 ) and Fe is atomically dispersed in nitrogen-doped carbon. The onset potential (0.988 V vs. RHE) and half-wave potential (0.846 V vs. RHE) of FePc@CD/M (1 : 20)-1000 are superior to those of a commercial 20% Pt/C catalyst. FePc@CD/M (1 : 20)-1000 also exhibits an approximately four-electron (3.84) transfer process, good stability and excellent methanol tolerance. Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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