Segmented Au/PtCo heterojunction nanowires for efficient formic acid oxidation catalysis

Yingjun Sun; Bolong Huang; Yingjie Li; Yingnan Qin; Ziqi Fu; Mingzi Sun; Lei Wang; Shaojun Guo

doi:10.1016/j.fmre.2021.06.016

Segmented Au/PtCo heterojunction nanowires for efficient formic acid oxidation catalysis

Yingjun Sun
, Bolong Huang^*
, Yingjie Li
, Yingnan Qin
, Ziqi Fu
, Mingzi Sun
, Lei Wang^*
, Shaojun Guo^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

13 Citations (Scopus)

7 Downloads (CityUHK Scholars)

Abstract

Exploring a new strategy for the removal of adsorbed CO (CO*) on a Pt surface at a low potential is the key to achieving enhanced catalysis for the formic acid oxidation reaction (FAOR); however, the development of such a strategy remains a significant challenge. Herein, we report a class of Au/PtCo heterojunction nanowires (HNWs) as efficient electrocatalysts for accelerating the FAOR. This heterojunction structure and the induced Co alloying effects can facilitate formic acid adsorption/activation on Pt with high CO tolerance, generating the FAOR pathway from dehydration to dehydrogenation. The optimized Au₂₃/Pt₆₃Co₁₄ HNWs showed the highest specific and mass activities of 11.7 mA cm⁻²_Pt and 6.42 A mg⁻¹_Pt reported to date, respectively, which are considerably higher than those of commercial Pt/C. DFT calculations confirmed that the electron-rich Au segment enhances the electronic activity of the PtCo NWs, which not only allows the construction of a highly efficient electron transfer channel for the FAOR but also suppresses CO formation. © 2021

Original language	English
Pages (from-to)	453-460
Journal	Fundamental Research
Volume	1
Issue number	4
Online published	10 Jul 2021
DOIs	https://doi.org/10.1016/j.fmre.2021.06.016
Publication status	Published - Jul 2021
Externally published	Yes

Research Keywords

Electrocatalysis
Formic acid oxidation reaction
Heterojunction structure
Nanowires
Pt-based catalyst

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This full text is made available under CC-BY-NC-ND 4.0. https://creativecommons.org/licenses/by-nc-nd/4.0/

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title = "Segmented Au/PtCo heterojunction nanowires for efficient formic acid oxidation catalysis",

abstract = "Exploring a new strategy for the removal of adsorbed CO (CO*) on a Pt surface at a low potential is the key to achieving enhanced catalysis for the formic acid oxidation reaction (FAOR); however, the development of such a strategy remains a significant challenge. Herein, we report a class of Au/PtCo heterojunction nanowires (HNWs) as efficient electrocatalysts for accelerating the FAOR. This heterojunction structure and the induced Co alloying effects can facilitate formic acid adsorption/activation on Pt with high CO tolerance, generating the FAOR pathway from dehydration to dehydrogenation. The optimized Au23/Pt63Co14 HNWs showed the highest specific and mass activities of 11.7 mA cm−2Pt and 6.42 A mg−1Pt reported to date, respectively, which are considerably higher than those of commercial Pt/C. DFT calculations confirmed that the electron-rich Au segment enhances the electronic activity of the PtCo NWs, which not only allows the construction of a highly efficient electron transfer channel for the FAOR but also suppresses CO formation. {\textcopyright} 2021",

keywords = "Electrocatalysis, Formic acid oxidation reaction, Heterojunction structure, Nanowires, Pt-based catalyst",

author = "Yingjun Sun and Bolong Huang and Yingjie Li and Yingnan Qin and Ziqi Fu and Mingzi Sun and Lei Wang and Shaojun Guo",

year = "2021",

month = jul,

doi = "10.1016/j.fmre.2021.06.016",

language = "English",

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TY - JOUR

T1 - Segmented Au/PtCo heterojunction nanowires for efficient formic acid oxidation catalysis

AU - Sun, Yingjun

AU - Huang, Bolong

AU - Li, Yingjie

AU - Qin, Yingnan

AU - Fu, Ziqi

AU - Sun, Mingzi

AU - Wang, Lei

AU - Guo, Shaojun

PY - 2021/7

Y1 - 2021/7

N2 - Exploring a new strategy for the removal of adsorbed CO (CO*) on a Pt surface at a low potential is the key to achieving enhanced catalysis for the formic acid oxidation reaction (FAOR); however, the development of such a strategy remains a significant challenge. Herein, we report a class of Au/PtCo heterojunction nanowires (HNWs) as efficient electrocatalysts for accelerating the FAOR. This heterojunction structure and the induced Co alloying effects can facilitate formic acid adsorption/activation on Pt with high CO tolerance, generating the FAOR pathway from dehydration to dehydrogenation. The optimized Au23/Pt63Co14 HNWs showed the highest specific and mass activities of 11.7 mA cm−2Pt and 6.42 A mg−1Pt reported to date, respectively, which are considerably higher than those of commercial Pt/C. DFT calculations confirmed that the electron-rich Au segment enhances the electronic activity of the PtCo NWs, which not only allows the construction of a highly efficient electron transfer channel for the FAOR but also suppresses CO formation. © 2021

AB - Exploring a new strategy for the removal of adsorbed CO (CO*) on a Pt surface at a low potential is the key to achieving enhanced catalysis for the formic acid oxidation reaction (FAOR); however, the development of such a strategy remains a significant challenge. Herein, we report a class of Au/PtCo heterojunction nanowires (HNWs) as efficient electrocatalysts for accelerating the FAOR. This heterojunction structure and the induced Co alloying effects can facilitate formic acid adsorption/activation on Pt with high CO tolerance, generating the FAOR pathway from dehydration to dehydrogenation. The optimized Au23/Pt63Co14 HNWs showed the highest specific and mass activities of 11.7 mA cm−2Pt and 6.42 A mg−1Pt reported to date, respectively, which are considerably higher than those of commercial Pt/C. DFT calculations confirmed that the electron-rich Au segment enhances the electronic activity of the PtCo NWs, which not only allows the construction of a highly efficient electron transfer channel for the FAOR but also suppresses CO formation. © 2021

KW - Electrocatalysis

KW - Formic acid oxidation reaction

KW - Heterojunction structure

KW - Nanowires

KW - Pt-based catalyst

UR - https://www.scopus.com/pages/publications/85113666892

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85113666892&origin=recordpage

U2 - 10.1016/j.fmre.2021.06.016

DO - 10.1016/j.fmre.2021.06.016

M3 - RGC 21 - Publication in refereed journal

SN - 2667-3258

VL - 1

SP - 453

EP - 460

JO - Fundamental Research

JF - Fundamental Research

IS - 4

ER -

Segmented Au/PtCo heterojunction nanowires for efficient formic acid oxidation catalysis

Abstract

Research Keywords

Publisher's Copyright Statement

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