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Title: Pt skin on Pd–Co–Zn/C ternary nanoparticles with enhanced Pt efficiency toward ORR

Abstract

Exploring highly active, stable and relatively low-cost nanomaterials for the oxygen reduction reaction (ORR) is of vital importance for the commercialization of proton exchange membrane fuel cells (PEMFCs). A highly active, durable, carbon supported, and monolayer Pt coated Pd–Co–Zn nanoparticle is synthesized via a simple impregnation–reduction method, followed by spontaneous displacement of Pt. By tuning the atomic ratios, we obtain the composition–activity volcano curve for the Pd–Co–Zn nanoparticles and determined that Pd : Co : Zn = 8 : 1 : 1 is the optimal composition. Compared with pure Pd/C, the Pd 8CoZn/C nanoparticles show a substantial enhancement in both the catalytic activity and the durability toward the ORR. Moreover, the durability and activity are further enhanced by forming a Pt skin on Pd 8CoZn/C nanocatalysts. Interestingly, after 10 000 potential cycles in N 2-saturated 0.1 M HClO 4 solution, Pd 8CoZn@Pt/C shows improved mass activity (2.62 A mg -1Pt) and specific activity (4.76 A m -2total), which are about 1.4 and 4.4 times higher than the initial values, and 37.4 and 5.5 times higher than those of Pt/C catalysts, respectively. After accelerated stability testing in O 2-saturated 0.1 M HClO 4 solution for 30 000 potential cycles, the half-wavemore » potential negatively shifts about 6 mV. Our results show that the Pt skin plays an important role in enhancing the activity as well as preventing degradation.« less

Authors:
 [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [2];  [1]
  1. Huazhong Univ. of Science and Technology, Wuhan (People's Republic of China). Key Lab. of Material Chemistry for Energy Conversion and Storage and Hubei Key Lab. of Material Chemistry and Service Failure
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1336138
Report Number(s):
BNL-112612-2016-JA
Journal ID: ISSN 2040-3364; NANOHL; R&D Project: 16060; 16060; KC0403020
Grant/Contract Number:
SC00112704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nanoscale
Additional Journal Information:
Journal Volume: 8; Journal Issue: 31; Journal ID: ISSN 2040-3364
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Oxygen Reduction Reaction; Fuel Cell; Center for Functional Nanomaterials

Citation Formats

Xiao, Weiping, Zhu, Jing, Han, Lili, Liu, Sufen, Wang, Jie, Wu, Zexing, Lei, Wen, Xuan, Cuijuan, Xin, Huolin L., and Wang, Deli. Pt skin on Pd–Co–Zn/C ternary nanoparticles with enhanced Pt efficiency toward ORR. United States: N. p., 2016. Web. doi:10.1039/C6NR03944H.
Xiao, Weiping, Zhu, Jing, Han, Lili, Liu, Sufen, Wang, Jie, Wu, Zexing, Lei, Wen, Xuan, Cuijuan, Xin, Huolin L., & Wang, Deli. Pt skin on Pd–Co–Zn/C ternary nanoparticles with enhanced Pt efficiency toward ORR. United States. doi:10.1039/C6NR03944H.
Xiao, Weiping, Zhu, Jing, Han, Lili, Liu, Sufen, Wang, Jie, Wu, Zexing, Lei, Wen, Xuan, Cuijuan, Xin, Huolin L., and Wang, Deli. Fri . "Pt skin on Pd–Co–Zn/C ternary nanoparticles with enhanced Pt efficiency toward ORR". United States. doi:10.1039/C6NR03944H. https://www.osti.gov/servlets/purl/1336138.
@article{osti_1336138,
title = {Pt skin on Pd–Co–Zn/C ternary nanoparticles with enhanced Pt efficiency toward ORR},
author = {Xiao, Weiping and Zhu, Jing and Han, Lili and Liu, Sufen and Wang, Jie and Wu, Zexing and Lei, Wen and Xuan, Cuijuan and Xin, Huolin L. and Wang, Deli},
abstractNote = {Exploring highly active, stable and relatively low-cost nanomaterials for the oxygen reduction reaction (ORR) is of vital importance for the commercialization of proton exchange membrane fuel cells (PEMFCs). A highly active, durable, carbon supported, and monolayer Pt coated Pd–Co–Zn nanoparticle is synthesized via a simple impregnation–reduction method, followed by spontaneous displacement of Pt. By tuning the atomic ratios, we obtain the composition–activity volcano curve for the Pd–Co–Zn nanoparticles and determined that Pd : Co : Zn = 8 : 1 : 1 is the optimal composition. Compared with pure Pd/C, the Pd8CoZn/C nanoparticles show a substantial enhancement in both the catalytic activity and the durability toward the ORR. Moreover, the durability and activity are further enhanced by forming a Pt skin on Pd8CoZn/C nanocatalysts. Interestingly, after 10 000 potential cycles in N2-saturated 0.1 M HClO4 solution, Pd8CoZn@Pt/C shows improved mass activity (2.62 A mg-1Pt) and specific activity (4.76 A m-2total), which are about 1.4 and 4.4 times higher than the initial values, and 37.4 and 5.5 times higher than those of Pt/C catalysts, respectively. After accelerated stability testing in O2-saturated 0.1 M HClO4 solution for 30 000 potential cycles, the half-wave potential negatively shifts about 6 mV. Our results show that the Pt skin plays an important role in enhancing the activity as well as preventing degradation.},
doi = {10.1039/C6NR03944H},
journal = {Nanoscale},
number = 31,
volume = 8,
place = {United States},
year = {Fri Jul 15 00:00:00 EDT 2016},
month = {Fri Jul 15 00:00:00 EDT 2016}
}

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