Enhancement of oxygen reduction reaction activity by grain boundaries in platinum nanostructures

Enbo Zhu; Wang Xue; Shiyi Wang; Xucheng Yan; Jingxuan Zhou; Yang Liu; Jin Cai; Ershuai Liu; Qingying Jia; Xiangfeng Duan; Yujing Li; Hendrik Heinz; Yu Huang

doi:10.1007/s12274-020-3007-2

Enhancement of oxygen reduction reaction activity by grain boundaries in platinum nanostructures

Enbo Zhu, Wang Xue, Shiyi Wang, Xucheng Yan, Jingxuan Zhou, Yang Liu, Jin Cai, Ershuai Liu, Qingying Jia, Xiangfeng Duan, Yujing Li, Hendrik Heinz^*, Yu Huang^*

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

Systematic control of grain boundary densities in various platinum (Pt) nanostructures was achieved by specific peptide-assisted assembly and coagulation of nanocrystals. A positive quadratic correlation was observed between the oxygen reduction reaction (ORR) specific activities of the Pt nanostructures and the grain boundary densities on their surfaces. Compared to commercial Pt/C, the grain-boundary-rich strain-free Pt ultrathin nanoplates demonstrated a 15.5 times higher specific activity and a 13.7 times higher mass activity. Simulation studies suggested that the specific activity of ORR was proportional to the resident number and the resident time of oxygen on the catalyst surface, both of which correlate positively with grain boundary density, leading to improved ORR activities. [Figure not available: see fulltext.].

Original language	English
Pages (from-to)	3310-3314
Number of pages	5
Journal	Nano Research
Volume	13
Issue number	12
DOIs	https://doi.org/10.1007/s12274-020-3007-2
Publication status	Published - 1 Dec 2020

Keywords

grain boundaries
nanowire
oxygen reduction reaction
peptide

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title = "Enhancement of oxygen reduction reaction activity by grain boundaries in platinum nanostructures",

abstract = "Systematic control of grain boundary densities in various platinum (Pt) nanostructures was achieved by specific peptide-assisted assembly and coagulation of nanocrystals. A positive quadratic correlation was observed between the oxygen reduction reaction (ORR) specific activities of the Pt nanostructures and the grain boundary densities on their surfaces. Compared to commercial Pt/C, the grain-boundary-rich strain-free Pt ultrathin nanoplates demonstrated a 15.5 times higher specific activity and a 13.7 times higher mass activity. Simulation studies suggested that the specific activity of ORR was proportional to the resident number and the resident time of oxygen on the catalyst surface, both of which correlate positively with grain boundary density, leading to improved ORR activities. [Figure not available: see fulltext.].",

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author = "Enbo Zhu and Wang Xue and Shiyi Wang and Xucheng Yan and Jingxuan Zhou and Yang Liu and Jin Cai and Ershuai Liu and Qingying Jia and Xiangfeng Duan and Yujing Li and Hendrik Heinz and Yu Huang",

note = "Publisher Copyright: {\textcopyright} 2020, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature.",

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doi = "10.1007/s12274-020-3007-2",

language = "English",

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TY - JOUR

T1 - Enhancement of oxygen reduction reaction activity by grain boundaries in platinum nanostructures

AU - Zhu, Enbo

AU - Xue, Wang

AU - Wang, Shiyi

AU - Yan, Xucheng

AU - Zhou, Jingxuan

AU - Liu, Yang

AU - Cai, Jin

AU - Liu, Ershuai

AU - Jia, Qingying

AU - Duan, Xiangfeng

AU - Li, Yujing

AU - Heinz, Hendrik

AU - Huang, Yu

PY - 2020/12/1

Y1 - 2020/12/1

N2 - Systematic control of grain boundary densities in various platinum (Pt) nanostructures was achieved by specific peptide-assisted assembly and coagulation of nanocrystals. A positive quadratic correlation was observed between the oxygen reduction reaction (ORR) specific activities of the Pt nanostructures and the grain boundary densities on their surfaces. Compared to commercial Pt/C, the grain-boundary-rich strain-free Pt ultrathin nanoplates demonstrated a 15.5 times higher specific activity and a 13.7 times higher mass activity. Simulation studies suggested that the specific activity of ORR was proportional to the resident number and the resident time of oxygen on the catalyst surface, both of which correlate positively with grain boundary density, leading to improved ORR activities. [Figure not available: see fulltext.].

AB - Systematic control of grain boundary densities in various platinum (Pt) nanostructures was achieved by specific peptide-assisted assembly and coagulation of nanocrystals. A positive quadratic correlation was observed between the oxygen reduction reaction (ORR) specific activities of the Pt nanostructures and the grain boundary densities on their surfaces. Compared to commercial Pt/C, the grain-boundary-rich strain-free Pt ultrathin nanoplates demonstrated a 15.5 times higher specific activity and a 13.7 times higher mass activity. Simulation studies suggested that the specific activity of ORR was proportional to the resident number and the resident time of oxygen on the catalyst surface, both of which correlate positively with grain boundary density, leading to improved ORR activities. [Figure not available: see fulltext.].

KW - grain boundaries

KW - nanowire

KW - oxygen reduction reaction

KW - peptide

UR - http://www.scopus.com/inward/record.url?scp=85089370607&partnerID=8YFLogxK

U2 - 10.1007/s12274-020-3007-2

DO - 10.1007/s12274-020-3007-2

M3 - Article

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SN - 1998-0124

VL - 13

SP - 3310

EP - 3314

JO - Nano Research

JF - Nano Research

IS - 12

ER -

Enhancement of oxygen reduction reaction activity by grain boundaries in platinum nanostructures

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Keywords

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