Uniform Pt nanoparticles supported on urchin-like mesoporous TiO2 hollow spheres as stable electrocatalysts for the oxygen reduction reaction - Details

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Abstract：

In　order　to　promote　the　commercial　application　of　proton　exchange　membrane　fuel　cells,　it　is　of　great　importance　to　develop　Pt-based　electrocatalysts　with　high　activity　and　stability　for　the　oxygen　reduction　reaction　(ORR).　Here,　urchin-like　mesoporous　TiO2　hollow　spheres　(UMTHS)　with　a　high　specific　surface　area　(167.1　m2　g-1)　and　improved　conductivity　were　designed　and　applied　as　supports　to　disperse　Pt　nanoparticles　(NPs)　for　the　first　time.　Uniform　Pt　NPs　(∼3.2　nm)　on　the　surface　of　nanothorns　were　obtained　after　heat　treatment.　The　as-prepared　product　(Pt/UMTHS)　exhibited　a　more　positive　half-wave　potential　(Eh)　than　that　of　the　reference　sample　Pt@C　without　UMTHS　(0.867　V　vs.　0.829　V).　The　improved　performance　can　be　ascribed　to　the　high　specific　surface　area　of　UMTHS.　The　Pt/UMTHS　also　exhibited　a　much　better　ORR　stability　than　the　commercial　Pt/C　after　long-term　cycling　at　0.6-1.0　V　according　to　the　comparison　of　Eh,　mass　activity　and　electrochemical　surface　area　with　Pt/C.　The　enhanced　stability　of　Pt/UMTHS　was　mainly　derived　from　the　strong　metal　support　interaction　between　Pt　NPs　and　UMTHS,　together　with　the　spatial　restriction　and　the　anti-restriction　provided　by　UMTHS.　©　2020　The　Royal　Society　of　Chemistry.

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[ 1 ] [He, S.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 2 ] [He, S.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou Fujian, 350116, China
[ 3 ] [Wu, C.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou Fujian, 350116, China
[ 4 ] [Sun, Z.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 5 ] [Sun, Z.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou Fujian, 350116, China
[ 6 ] [Liu, Y.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou Fujian, 350116, China
[ 7 ] [Hu, R.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou Fujian, 350116, China
[ 8 ] [Guan, L.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou Fujian, 350116, China
[ 9 ] [Zhan, H.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China

Reprint 's Address：

[Zhan, H.]College of Materials Science and Engineering, Fuzhou UniversityChina

Email：

hbzhan@fzu.edu.cn

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Source ：

Nanoscale

ISSN： 2040-3364

Year： 2020

Issue： 19

Volume： 12

Page： 10656-10663

7 . 7 9

JCR@2020

5 . 8 0 0

JCR@2023

ESI HC Threshold：115

JCR Journal Grade：1

CAS Journal Grade：2

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WoS CC Cited Count：

SCOPUS Cited Count： 18

ESI Highly Cited Papers on the List： 0 Unfold All

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Chinese Cited Count：

30 Days PV： 3

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