High-Performance Pt–Co Nanoframes for Fuel-Cell Electrocatalysis

Chen, Shouping; Li, Mufan; Gao, Mengyu; Jin, Jianbo; van Spronsen, Matthijs A.; Salmeron, Miquel B.; Yang, Peidong

doi:10.1021/acs.nanolett.9b05251

High-Performance Pt–Co Nanoframes for Fuel-Cell Electrocatalysis

Journal Article · Tue Feb 11 23:00:00 EST 2020 · Nano Letters

DOI:https://doi.org/10.1021/acs.nanolett.9b05251· OSTI ID:1671763

^[1]; Li, Mufan ^[2]; Gao, Mengyu ^[3]; Jin, Jianbo ^[3]; van Spronsen, Matthijs A. ^[2]; ^[2]; ^[4]

Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Kavli Energy NanoScience Institute, Berkeley, CA (United States)

Pt-based alloy catalysts are promising candidates for fuel-cell applications, especially for cathodic oxygen reduction reaction (ORR) and anodic methanol oxidation reaction (MOR). The rational design of composition and morphology is crucial to promoting catalytic performances. Here, we report the synthesis of Pt–Co nanoframes via chemical etching of Co from solid rhombic dodecahedra. The obtained Pt–Co nanoframes exhibit excellent ORR mass activity in acidic electrolyte, which is as high as 0.40 A mg_Pt^–1 initially and 0.34 A mg_Pt^–1 after 10 000 potential cycles at 0.95 V_RHE. Furthermore, their MOR mass activity in alkaline media is up to 4.28 A mg_Pt^–1 and is 4-fold higher than that of commercial Pt/C catalyst. Furthermore, experimental studies indicate that the weakened binding of intermediate carbonaceous poison contributes to the enhanced MOR behavior. More impressively, the Pt–Co nanoframes also demonstrate remarkable stability under long-term testing, which could be attributed to the negligible electrochemical Co dissolution.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1671763

Journal Information:: Nano Letters, Journal Name: Nano Letters Journal Issue: 3 Vol. 20; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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25 ENERGY STORAGE
fuel cell
methanol oxidation reaction
nanoframe
oxygen reduction reaction
platinum-cobalt electrocatalyst

High-Performance Pt–Co Nanoframes for Fuel-Cell Electrocatalysis

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